Date: Mon, 30 Mar 20 00:20:29 GMT Subject: hep-ph daily 16 new + 7 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-ph@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Thu 26 Mar 20 18:00:00 GMT to Fri 27 Mar 20 18:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:2003.12069 Date: Thu, 26 Mar 2020 17:43:18 GMT (10kb) Title: A new scheme for neutrino mass generation and relevant new physics Authors: Yanbin Deng, Changyu Huang and Yong-Chang Huang Categories: hep-ph Comments: 6 pages \\ We propose a new scheme for neutrino mass generation through a modification of the standard Higgs mechanism implemented by introducing an unconventional tiny vacuum breaking to the charged Higgs field. In this modified Higgs mechanism, with identical particle spectrum as the standard electroweak model, the lepton-Higgs Yukawa coupling Lagrangian would carry a modified lepton mass matrix. Combining the latest data of particle experiments with this modified lepton mass matrix enable us to locate the value of the parameter parametrizing the extra perturbative Higgs vacuum breaking and produce masses for neutrinos of three generations. We show that our results satisfy the constraints from current physical experiments and cosmological observations. In the new Higgs mechanism now we propose, the Higgs vacua are completely broken, such that, the very minuteness of the extra Higgs vacuum breaking explains the origin of the very minuteness of neutrino masses, while the relative greatness of the standard Higgs vacuum breaking is recognized as the origin of the relative greatness of charged lepton masses. This proposal can bring rich new physics to Higgs-relevant problems in particle physics, besides injecting new inspiration to the solution of massive neutrino problems. \\ ( https://arxiv.org/abs/2003.12069 , 10kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12077 Date: Thu, 26 Mar 2020 18:00:12 GMT (918kb,D) Title: Plasmon production from dark matter scattering Authors: Jonathan Kozaczuk, Tongyan Lin Categories: hep-ph astro-ph.CO hep-ex Comments: 10 pages \\ We present a first calculation of the rate for plasmon production in semiconductors from nuclei recoiling against dark matter. The process is analogous to bremsstrahlung of transverse photon modes, but with a longitudinal plasmon mode emitted instead. For dark matter in the 10 MeV - 1 GeV mass range, we find that the plasmon bremsstrahlung rate is 4-5 orders of magnitude smaller than that for elastic scattering, but 4-5 orders of magnitude larger than the transverse bremsstrahlung rate. Because the plasmon can decay into electronic excitations and has characteristic energy given by the plasma frequency $\omega_p$, with $\omega_p \approx 16$ eV in Si crystals, plasmon production provides a distinctive signature and new method to detect nuclear recoils from sub-GeV dark matter. \\ ( https://arxiv.org/abs/2003.12077 , 918kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12217 Date: Fri, 27 Mar 2020 03:33:02 GMT (116kb,D) Title: Deuteron EDM induced by CP violating couplings of pseudoscalar mesons Authors: Alexey S. Zhevlakov and Valery E. Lyubovitskij Categories: hep-ph \\ We analyze contributions to the electric dipole (EDM) and Schiff (SFM) moments of deuteron induced by the CP-violating three-pseudoscalar meson couplings using phenomenological Lagrangian approach involving nucleons and pseudoscalar mesons $P=\pi, K, \eta, \eta'$. Deuteron is considered as a proton-neutron bound state and its properties are defined by one- and two-body forces. One-body forces correspond to a picture there proton and neutron are quasi free constituents of deuteron and their contribution to the deuteron EDM (dEDM) is simply the sum of proton and neutron EDMs. Two-body forces in deuteron are induced by one-meson exchange between nucleons. They produce a contribution to the dEDM, which is estimated using corresponding potential approach. From numerical analysis of nucleon and deuteron EDMs we derive stringent limits on CP-violating hadronic couplings and $\bar\theta$ parameter. We showed that proposed measurements of proton and deuteron EDMs at level of $\sim 10^{-29}$ by the Store Ring EDM and JEDI Collaborations will provide more stringent upper limits on the CP violating parameters. \\ ( https://arxiv.org/abs/2003.12217 , 116kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12226 Date: Fri, 27 Mar 2020 03:53:35 GMT (2765kb) Title: Study of $B_s\to K^{(*)}\ell^+ \ell^-$ decays in the PQCD factorization approach with the lattice QCD input Authors: Su-Ping Jin, Xue-Qing Hu and Zhen-Jun Xiao Categories: hep-ph hep-ex hep-lat Comments: 38 pages, 13 tables and 8 figures \\ In this paper, we studied the semileptonic decays $B_s \to K^{(*)} \ell^+ \ell^-$ with $l^-=(e^-,\mu^-,\tau^-)$ by using the perturbative QCD (PQCD) and the "PQCD+Lattice" factorization approach, respectively. We first evaluated all relevant form factors $F_i(q^2)$ in the low $q^2$ region using the PQCD approach, and we also take the available Lattice QCD results at the end point $q^2_{max}$ as additional input to improve the extrapolation of the form factors to the high $q^2$ region. We calculated the branching ratios and other twelve kinds of physical observables. We find the following points: (a) for $ B_s \to K l^+ l^-$ decays, the PQCD and "PQCD+Lattice" predictions for branching ratios (BRs) ${\cal B}(B_s \to K l^+ l^-)$, the ratios of the BRs $R_K^{e\mu,\mu\tau }$ and the longitudinal polarization asymmetry of the leptons $P_L$ agree well within errors; (b) the "PQCD+Lattice" prediction ${\cal B}(B_s \to K^\ast \mu^+ \mu^-)=(2.58^{+0.69}_{-0.60})\times 10^{-8}$ does agree well with the LHCb measured value $ (2.9\pm 1.1 ) \times 10^{-8}$; (c) for the angular observables $P_{1,2,3}$ and $P^\prime_{4,5,6,8}$ , our theoretical predictions for each lepton $l^-$ are consistent within errors; (d) the theoretical predictions of the angular observables $P_3$ and $P'_{6,8}$ are less than $10^{-2}$ in absolute value, but the magnitude of $P_{1,2}$ and $P'_{4,5}$ are larger than $0.2$; and (e) the PQCD and "PQCD+Lattice" predictions of the binned values of all considered observables in the two $q^2$-bins $[0.1-0.98]$GeV$^2$ and $[1.1-6]$GeV$^2$ generally agree with each other and also be consistent with the LCSR results within errors. We believe that above predictions could be measured by future LHCb and Belle-II experiments. \\ ( https://arxiv.org/abs/2003.12226 , 2765kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12249 Date: Fri, 27 Mar 2020 06:09:14 GMT (42kb,D) Title: Light Meson Parton Distribution Functions from Basis Light-Front Quantization and QCD Evolution Authors: Jiangshan Lan, Chandan Mondal, Shaoyang Jia, Xingbo Zhao, James P. Vary Categories: hep-ph nucl-th Comments: Conference: C19-08-16 \\ We investigate the parton distribution functions (PDFs) of the pion and kaon from the eigenstates of a light-front effective Hamiltonian in the constituent quark-antiquark representation suitable for low-momentum scale applications. By taking these scales as the only free parameters, the valence quark distribution functions of the pion, after QCD evolving, are consistent with the E615 experiment at Fermilab. In addition, the ratio of the up quark distribution in the kaon to that in the pion also agrees with the NA3 experimental result at CERN. \\ ( https://arxiv.org/abs/2003.12249 , 42kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12253 Date: Fri, 27 Mar 2020 06:48:55 GMT (30kb) Title: Cross sections for 2-to-1 meson-meson scattering Authors: Wan-Xia Li, Xiao-Ming Xu, H. J. Weber Categories: hep-ph nucl-th Comments: 33 pages, 4 figures, 7 tables, LaTex \\ We study the processes $K\bar{K} \to \phi$, $\pi D \to D^\ast$, $\pi \bar{D} \to \bar{D}^\ast$, and the production of $\psi (4160)$ and $\psi (4415)$ mesons in collisions of charmed mesons or charmed strange mesons. The 2-to-1 meson-meson scattering involves a process where a quark and an antiquark from the two initial mesons annihilate into a gluon and subsequently the gluon is absorbed by the spectator quark or antiquark. Transition amplitudes for the scattering process derive from the transition potential in conjunction with mesonic quark-antiquark wave functions and the relative-motion wave function of the two initial mesons. We derive these transition amplitudes in the partial wave expansion of the relative-motion wave function of the two initial mesons so that parity and total-angular-momentum conservation are maintained. We calculate flavor and spin matrix elements in accordance with the transition potential and unpolarized cross sections for the reactions using the transition amplitudes. Cross sections for the production of $\psi (4160)$ and $\psi (4415)$ generally increase as the colliding mesons go through the cases of $D\bar{D}$, $D^*\bar{D}$, and $D^*\bar{D}^*$ or the cases of $D_s^+D_s^-$, $D_s^{*+}D_s^-$, and $D_s^{*+}D_s^{*-}$. We suggest the production of $\psi (4160)$ and $\psi (4415)$ as a probe of hadronic matter that results from the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. \\ ( https://arxiv.org/abs/2003.12253 , 30kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12272 Date: Fri, 27 Mar 2020 08:15:03 GMT (1557kb) Title: Investigation of rare semileptonic $ B_c$ decays into $(D_(s,d)^((*))){\mu}^+ {\mu}^-$ decays with non-universal $ Z'$ effect Authors: P. Maji, S. Mahata, P. Nayek, S. Biswas and S. Sahoo Categories: hep-ph Comments: Accepted for publication in Chinese Physics C Journal-ref: Chinese Physics C, 2020 \\ In this paper, we analyze different decay observables of semileptonic $ B_c$ decays into $(D_(s,d)^((*))){\mu}^+ {\mu}^-$ such as branching ratio, forward-backward asymmetry, polarization fraction and lepton polarization asymmetry in the non-universal Z' model. We have also studied the dependence of branching fraction to the new model parameters. Here, we have found that the values of different decay parameters increase in the Z' model, which provides a possible way out for the search of new physics as well as the unknown phenomena of charm B meson. \\ ( https://arxiv.org/abs/2003.12272 , 1557kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12281 Date: Fri, 27 Mar 2020 08:50:03 GMT (256kb,D) Title: Measuring the trilinear Higgs boson self--coupling at the 100 TeV hadron collider via multivariate analysis Authors: Jubin Park, Jung Chang, Kingman Cheung, and Jae Sik Lee Categories: hep-ph Comments: 18 pages, 3 figures, 4 tables Report-no: IUEP-HEP-20-01 \\ We perform a multivariate analysis of Higgs-pair production via the decay channel $HH \to b\bar b \gamma\gamma$ at the future 100 TeV $pp$ collider to determine the trilinear Higgs self--coupling (THSC) $\lambda_{3H}$, which takes the value of 1 in the standard model. We consider all known background processes. For the signal we adopt the most recent event generator of {\tt POWHEG-BOX-V2} to exploit the NLO distributions for Toolkit for Multivariate Data Analysis (TMVA). Through the technique of Boosted Decision Tree (BDT) analysis trained for $\lambda_{3H}=1$, compared to the the conventional cut-and-count approach, the signal-to-background ratio improves tremendously from about $1/10$ to $1$ and the significance can reach up to $20.5$ with a luminosity of 3 ab$^{-1}$. In addition, by implementing a likelihood fitting of the signal-plus-background $M_{\gamma\gamma b b}$ distribution with optimized bin sizes, the THSC can be determined with the precision of 7.5\% at 68\% CL with 3 ab$^{-1}$. \\ ( https://arxiv.org/abs/2003.12281 , 256kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12320 Date: Fri, 27 Mar 2020 10:39:04 GMT (529kb,D) Title: Improving $t \bar{t}$ reconstruction in the dilepton channel at future lepton colliders Authors: P. Mart\'in-Ramiro, J. M. Moreno Categories: hep-ph hep-ex Comments: 17 pages, 5 figures, 3 tables \\ A future lepton collider, such as the proposed CLIC or ILC, would allow to study top quark properties with unprecedented precision. In this paper, we present a method to reconstruct the $t \bar{t}$ decay in the dilepton channel at future $e^+e^-$ colliders. We derive a simple, closed analytical expression for the neutrino four-momenta as a function of the $W$ boson mass and develop a maximization procedure to find the optimal solution for the reconstruction of the full $t \bar{t}$ event. We show that our method is able to reconstruct neutrino four-momenta with an error of less than $2 \, \%$ in $60 \, \%$ of the times. Finally, we test the performance of this reconstruction method in the calculation of the helicity fractions of the $W$ boson. A precise measurement of these observables could be used to probe new physics effects in the $Wtb$ vertex. We find that, from a large $t \bar{t}$ sample, our reconstruction method allows to calculate these observables with an accuracy better than $1 \, \%$. \\ ( https://arxiv.org/abs/2003.12320 , 529kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12329 Date: Fri, 27 Mar 2020 11:11:35 GMT (261kb,D) Title: Dark-matter spontaneous freeze out Authors: Herv\'e Partouche Categories: hep-ph astro-ph.HE hep-th Comments: Based on a talk given at the International Conference on Neutrinos and Dark Matter (NDM-2020), 11-14 January 2020, Hurghada, Egypt \\ We consider the possibility that thermalized dark-matter particles acquire their mass thanks to the spontaneous breaking of a symmetry below some critical temperature. We describe the regime where a freeze out mechanism takes place shortly after the onset of the phase transition, while the dark-matter mass has not yet reached its final constant value. For such a "spontaneous freeze out" to yield the correct relic density, the present-time cross section of annihilation of the dark matter into Standard-Model states has to be one or two orders of magnitude larger than in the case of a constant dark-matter mass. \\ ( https://arxiv.org/abs/2003.12329 , 261kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12391 Date: Fri, 27 Mar 2020 12:59:59 GMT (3318kb,D) Title: What pp SUSY limits mean for future e$^+$e$^-$ colliders Authors: Mikael Berggren (1) ((1) DESY, Hamburg, Germany) Categories: hep-ph hep-ex Comments: Contribution to the International Workshop on Future Linear Colliders (LCWS2019), Sendai, Japan,28 October-1 November, 2019. C19-10-28 \\ It is well-known that e$^+$e$^-$ colliders have the power to with certainty exclude or discover any SUSY model that predicts a Next to lightest SUSY particle (an NLSP) that has a mass up to slightly below the half the centre-of-mass energy of the collider. Here, we present an estimation of the power of present and future hadron colliders to extend the reach of searches for SUSY, with particular emphasis whether it can be claimed that either discovery or exclusion is {\it guaranteed} in a region of LSP and NLSP masses - no set of values of the other SUSY could change the conclusion. A scan over SUSY parameter space was done, only requiring that the NLSP was a bosino - the hardest case - with mass not larger than a few TeV. The mass-spectrum, cross-sections and decay branching ratios found in this region were confronted with projections of sensitivity at future hadron colliders. In our conclusions we weigh in the maturity of the analysis the projections are based upon. The conclusion is that although future hadron colliders have a large discovery-reach, i.e. potential to discover {\it some} SUSY model, hardly any models with low-to-medium LSP-NLSP mass-differences can be excluded with certainty. The models that are expected to be excluded/discovered are, on one hand, those with mass-differences larger than those allowed by models with GUT-scale $M_1$-$M_2$ unification, and on the other hand, a tiny region where the mass-difference is so small that the NLSP decays in the tracking volume of the detectors. Excluding the latter possibility does not, however, allow to exclude the possibility of a Wino or Higgsino LSP: at any value of the LSP mass, we could identify models where the NLSP lifetime would be too short for a signal to be seen. \\ ( https://arxiv.org/abs/2003.12391 , 3318kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12407 Date: Fri, 27 Mar 2020 13:18:45 GMT (1016kb,D) Title: Disentangling different structures in heavy-light four-quark states Authors: Paul C. Wallbott, Gernot Eichmann and Christian S. Fischer Categories: hep-ph hep-lat Comments: 9 pages, 4 figures \\ Models proposed to explain recently discovered heavy-light four-quark states already assume certain internal structures, i.e. the (anti)quark constituents are grouped into diquark/antidiquark clusters, heavy-meson/light-meson clusters (hadrocharmonium) or heavy-light meson molecules. We propose and use an approach to four-quark states based on Dyson-Schwinger and Bethe-Salpeter equations that has the potential to discriminate between these models. We study heavy-light $cq\bar{q}\bar{c}$ and $cc\bar{q}\bar{q}$ four-quark states with $q=u,d,s$ and quantum numbers $I(J^{PC})=0(1^{++}),1(1^{+-}),0(0^{++})$ and $1(0^+),0(1^+),1(1^+)$. We identify the dominant components of the ground states with these quantum numbers and suggest candidates for corresponding experimental states. Most notably, we find strong heavy-light meson-meson and negligible diquark-antidiquark components in all $cq\bar{q}\bar{c}$ states, whereas for $cc\bar{q}\bar{q}$ states diquarks are present. \\ ( https://arxiv.org/abs/2003.12407 , 1016kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12421 Date: Fri, 27 Mar 2020 13:59:50 GMT (1538kb,D) Title: Charm Physics Confronts High-$p_T$ Lepton Tails Authors: Javier Fuentes-Martin, Admir Greljo, Jorge Martin Camalich, Jose David Ruiz-Alvarez Categories: hep-ph hep-ex Comments: 34 pages, 7 figures Report-no: CERN-TH-2020-047 \\ We present a systematic survey of possible short-distance new-physics effects in (semi)leptonic charged- and neutral-current charmed meson decays. Using the Standard Model Effective Field Theory (SMEFT) to analyze the most relevant experimental data at low and high energies, we demonstrate a striking complementarity between charm decays and high invariant mass lepton tails at the LHC. Interestingly enough, high-$p_T$ Drell-Yan data offer competitive constraints on most new physics scenarios. Furthermore, the full set of correlated constraints from $K$, $\pi$ and $\tau$ decays imposed by $SU(2)_L$ gauge invariance is considered. The bounds from $D_{(s)}$ decays, high-$p_T$ lepton tails and $SU(2)_L$ relations chart the space of the SMEFT affecting semi(leptonic) charm flavor transitions. \\ ( https://arxiv.org/abs/2003.12421 , 1538kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12435 Date: Fri, 27 Mar 2020 14:29:36 GMT (402kb,D) Title: Parton-shower effects in Higgs production via Vector-Boson Fusion Authors: Barbara J\"ager, Alexander Karlberg, Simon Pl\"atzer, Johannes Scheller, Marco Zaro Categories: hep-ph Comments: 18 pages including figures and references Report-no: OUTP-20-01P, MCNET-20-14, UWTHPH 2020-4, TIF-UNIMI-2020-10, VBSCAN-PUB-01-20 \\ We present a systematic investigation of parton-shower and matching uncertainties for Higgs-boson production via vector-boson fusion. To this end we employ different generators at next-to-leading order QCD accuracy matched with shower Monte Carlo programs, PYTHIA8 and HERWIG7, and a next-to-next-to-leading order QCD calculation. We thoroughly analyse the intrinsic sources of uncertainty within each generator, and then compare predictions among the different tools using the respective recommended setups. Within typical vector-boson fusion cuts, the resulting uncertainties on observables that are accurate to next-to-leading order are at the 10% level for rates and even smaller for shapes. For observables sensitive to extra radiation effects uncertainties of about 20% are found. We furthermore show how a specific recoil scheme is needed when PYTHIA8 is employed, in order not to encounter unphysical enhancements for these observables. We conclude that for vector-boson fusion processes an assessment of the uncertainties associated with a simulation at next-to-leading order matched to parton showers based only on the variation of renormalisation, factorisation and shower scales systematically underestimates their true size. \\ ( https://arxiv.org/abs/2003.12435 , 402kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12525 Date: Fri, 27 Mar 2020 16:41:49 GMT (45kb,D) Title: Matching scalar leptoquarks to the SMEFT at one loop Authors: Valerio Gherardi, David Marzocca, Elena Venturini Categories: hep-ph hep-th Comments: Body of paper: 21 pages. Appendices: 31 pages \\ In this paper we present the complete one-loop matching conditions, up to dimension-six operators of the Standard Model effective field theory, resulting by integrating out the two scalar leptoquarks $S_{1}$ and $S_{3}$. This allows a phenomenological study of low-energy constraints on this model at one-loop accuracy, which will be the focus of a subsequent work. Furthermore, it provides a rich comparison for functional and computational methods for one-loop matching, that are being developed. As a corollary result, we derive a complete set of dimension-six operators independent under integration by parts, but not under equations of motions, called Green's basis, as well as the complete reduction formulae from this set to the Warsaw basis. \\ ( https://arxiv.org/abs/2003.12525 , 45kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12567 Date: Fri, 27 Mar 2020 17:59:59 GMT (439kb,D) Title: Quark and pion condensates at finite isospin density in chiral perturbation theory Authors: Prabal Adhikari and Jens O. Andersen Categories: hep-ph hep-lat nucl-th Comments: 9 pages, 3 figures \\ In this paper, we consider two-flavor QCD at zero temperature and finite isospin chemical potential ($\mu_I$) using a model-independent analysis within chiral perturbation theory at next-to-leading order. We calculate the effective potential, the chiral condensate and the pion condensate in the pion-condensed phase at both zero and nonzero pionic source. We compare our finite pionic source results for the chiral condensate and the pion condensate with recent (2+1)-flavor lattice QCD results and find that they are in excellent agreement. \\ ( https://arxiv.org/abs/2003.12567 , 439kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:2003.12086 (*cross-listing*) Date: Thu, 26 Mar 2020 18:05:26 GMT (887kb,D) Title: Ratios of the hadronic contributions to the lepton $g-2$ from Lattice QCD+QED simulations Authors: D. Giusti and S. Simula Categories: hep-lat hep-ex hep-ph physics.atom-ph Comments: 28 pages, 4 figures, 3 tables \\ The ratios among the leading-order (LO) hadronic vacuum polarization (HVP) contributions to the anomalous magnetic moments of electron, muon and tau-lepton, $a_{\ell = e, \mu, \tau}^{ HVP, LO}$, are computed using lattice QCD+QED simulations. The results include the effects at order $O(\alpha_{em}^2)$ as well as the electromagnetic and strong isospin-breaking corrections at orders $O(\alpha_{em}^3)$ and $O(\alpha_{em}^2 (m_u - m_d))$, respectively, where $(m_u - m_d)$ is the u- and d-quark mass difference. We employ the gauge configurations generated by the Extended Twisted Mass Collaboration with $N_f = 2+1+1$ dynamical quarks at three values of the lattice spacing ($a \simeq 0.062, 0.082, 0.089$ fm) with pion masses in the range 210 - 450 MeV. We show that in the case of the electron-muon ratio the hadronic uncertainties in the numerator and in the denominator largely cancel out, while in the cases of the electron-tau and muon-tau ratios such a cancellation does not occur. For the electron-muon ratio we get $R_{e / \mu } \equiv (m_\mu / m_e)^2 (a_e^{HVP, LO} / a_\mu^{HVP, LO}) = 1.1478~(70)$ with an uncertainty of ~ 0.6 %. Our result, which represents an accurate Standard Model (SM) prediction, agrees very well with the estimate obtained using the results of dispersive analyses of the experimental $e^+ e^- \to$ hadrons data. Instead, it differs by ~ 2.7 standard deviations from the value expected from present electron and muon ($g - 2$) experiments after subtraction of the current estimates of the QED, electro-weak, hadronic light-by-light and higher-order HVP contributions, namely $R_{e / \mu} = 0.575~(213)$. An improvement of the precision of both the experiment and the QED contribution to the electron ($g - 2$) by a factor of $\simeq 2$ could be sufficient to reach a tension with the SM value of the ratio $R_{e / \mu }$ at a significance level of ~ 5 standard deviations. \\ ( https://arxiv.org/abs/2003.12086 , 887kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12130 (*cross-listing*) Date: Thu, 26 Mar 2020 19:55:15 GMT (2695kb,D) Title: Charged multi-hadron systems in lattice QCD+QED Authors: S. R. Beane, W. Detmold, R. Horsley, M. Illa, M. Jafry, D. J. Murphy, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, P. E. Shanahan, H. St\"uben, M. L. Wagman, F. Winter, R. D. Young, and J. M. Zanotti Categories: hep-lat hep-ph nucl-th Comments: 67 pages, 27 figures \\ Systems with the quantum numbers of up to twelve charged and neutral pseudoscalar mesons, as well as one-, two-, and three-nucleon systems, are studied using dynamical lattice quantum chromodynamics and quantum electrodynamics (QCD+QED) calculations and effective field theory. QED effects on hadronic interactions are determined by comparing systems of charged and neutral hadrons after tuning the quark masses to remove strong isospin breaking effects. A non-relativistic effective field theory, which perturbatively includes finite-volume Coulomb effects, is analyzed for systems of multiple charged hadrons and found to accurately reproduce the lattice QCD+QED results. QED effects on charged multi-hadron systems beyond Coulomb photon exchange are determined by comparing the two- and three-body interaction parameters extracted from the lattice QCD+QED results for charged and neutral multi-hadron systems. \\ ( https://arxiv.org/abs/2003.12130 , 2695kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12256 (*cross-listing*) Date: Fri, 27 Mar 2020 07:00:17 GMT (19kb) Title: Planck scale from broken local conformal invariance in Weyl geometry Authors: Ichiro Oda Categories: hep-th gr-qc hep-ph Comments: 17 pages; Contribution to the Proceedings of the Corfu Summer Institute 2019, 31 Aug - 25 Sep 2019, Corfu, Greece. arXiv admin note: substantial text overlap with arXiv:1903.09309 Report-no: DPUR/TH/67 \\ We show that in a quadratic gravity based on Weyl's conformal geometry, the Planck mass scale can be generated from quantum effects of the gravitational field and the Weyl gauge field via the Coleman-Weinberg mechanism where a local scale symmetry is broken. At the same time, the Weyl gauge field acquires a mass less than the Planck mass by absorbing the scalar graviton. The shape of the effective potential is almost flat owing to a gravitational character and high symmetries, so our model would provide for an attractive model for the inflationary universe. We also present a toy model showing spontaneous symmetry breakdown of a global scale symmetry by moving from the Jordan frame to the Einstein one, and point out its problems. \\ ( https://arxiv.org/abs/2003.12256 , 19kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12279 (*cross-listing*) Date: Fri, 27 Mar 2020 08:40:42 GMT (19kb,D) Title: Second-order effective energy-momentum tensor of gravitational scalar perturbations with perfect fluid Authors: Inyong Cho, Jinn-Ouk Gong and Seung Hun Oh Categories: gr-qc astro-ph.CO hep-ph hep-th Comments: 21 pages \\ We investigate the second-order gravitational scalar perturbations for a barotropic fluid. We derive the effective energy-momentum tensor described by the quadratic terms of the gravitational and the matter perturbations. We show that the second-order effective energy-momentum tensor is gauge dependent. We impose three gauge conditions (longitudinal, spatially-flat, and comoving gauges) for dust and radiation. The resulting energy-momentum tensor is described only by a gauge invariant variable, but the functional form depends on the gauge choice. In the matter-dominated epoch with dust-like fluid background, the second-order effective energy density and pressure of the perturbations evolve as 1/a^2 in all three gauge choices, like the curvature density of the Universe, but they do not provide the correct equation of state. The value of this parameter depends also on the gauge choice. In the radiation-dominated epoch, the perturbations in the short-wave limit behave in the same way as the radiation-like fluid in the longitudinal and the spatially-flat gauges. However, they behave in a different way in the comoving gauge. As a whole, we conclude that the second-order effective energy-momentum tensor of the scalar perturbation is strictly gauge dependent. \\ ( https://arxiv.org/abs/2003.12279 , 19kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12482 (*cross-listing*) Date: Fri, 27 Mar 2020 15:36:34 GMT (1473kb,D) Title: Anomalous chiral transports and spin polarization in heavy-ion collisions Authors: Yu-Chen Liu, Xu-Guang Huang Categories: nucl-th hep-ph nucl-ex Comments: 35 pages, 13 figures. A review article for Nucl. Sci. Tech \\ The relativistic heavy-ion collisions create hot quark-gluon plasma as well as very strong electromagnetic and fluid vortical fields. The strong electromagnetic field and vorticity can induce intriguing macroscopic quantum phenomena such as chiral magnetic effect, chiral separation effect, chiral electric separation effect, chiral vortical effects, and spin polarization of hadrons. These phenomena provide us the experimentally feasible means to study the nontrivial topological sector of the quantum chromodynamics, the possible parity violation of strong interaction at high temperature, and the subatomic spintronics of quark-gluon plasma. These studies, both in theory and in experiment of heavy-ion collisions, are strongly entangled with other subfields of physics, such as condensed matter physics, astrophysics, and cold atomic physics, and thus form an emerging interdisciplinary research area. We will give an introduction to the above phenomena induced by electromagnetic field and vorticity and an overview about the current status of their experimental search in heavy-ion collisions. We also briefly discuss the spin hydrodynamics and the chiral and spin kinetic theories. \\ ( https://arxiv.org/abs/2003.12482 , 1473kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12487 (*cross-listing*) Date: Fri, 27 Mar 2020 15:40:27 GMT (6kb) Title: String Backgrounds in String Geometry Authors: Masaki Honda, Matsuo Sato Categories: hep-th gr-qc hep-ph Comments: 6 pages Report-no: WU-HEP-20-06 \\ String geometry theory is a candidate of the non-perturbative formulation of string theory. In order to determine the string vacuum, we need to clarify how string backgrounds are described in string geometry theory. In this paper, we show that arbitrary configurations of the string backgrounds are embedded in configurations of the fields of string geometry theory. Especially, we show that the action of the string backgrounds is obtained by a consistent truncation of the action of the string geometry model; the configurations of the fields of string geometry theory satisfy their equations of motion if and only if the embedded configurations of the string backgrounds satisfy their equations of motion. \\ ( https://arxiv.org/abs/2003.12487 , 6kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12536 (*cross-listing*) Date: Fri, 27 Mar 2020 17:02:36 GMT (2633kb,D) Title: Nonperturbative Effects on Radiative Energy Loss of Heavy Quarks Authors: Shuai Y.F. Liu and Ralf Rapp Categories: nucl-th hep-ph nucl-ex Comments: 24 pages, 13 figures \\ The radiative energy loss of fast partons traveling through the quark-gluon plasma (QGP) is commonly studied within perturbative QCD (pQCD). Nonperturbative (NP) effects, which are expected to become important near the critical temperature, have been much less investigated. Here, we utilize a recently developed $T$-matrix approach to incorporate NP effects for gluon emission off heavy quarks propagating through the QGP. We set up four cases that contain, starting from a Born diagram calculation with color-Coulomb interaction, an increasing level of NP components, by subsequently including (remnants of) confining interactions, resummation in the heavy-light scattering amplitude, and off-shell spectral functions for both heavy and light partons. For each case we compute the power spectra of the emitted gluons, heavy-quark transport coefficients (drag and transverse-momentum broadening, $\hat{q}$), and the path-length dependent energy loss within a "QGP brick" at fixed temperature. Investigating the differences in these quantities between the four cases illustrates how NP mechanisms affect gluon radiation processes. While the baseline perturbative processes experience a strong suppression of soft radiation due to thermal masses of the emitted gluons, confining interactions, ladder resummations and broad spectral functions (re-)generate a large enhancement toward low momenta and low temperatures. For example, for a 10 GeV charm quark at 200 MeV temperature, they enhance the transport coefficients by up to a factor of 10, while the results smoothly converge to perturbative results at sufficiently hard scales. \\ ( https://arxiv.org/abs/2003.12536 , 2633kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1612.09138 (*cross-listing*) replaced with revised version Fri, 27 Mar 2020 17:57:47 GMT (497kb) Title: Spectral and Transport Properties of Quark-Gluon Plasma in a Nonperturbative Approach Authors: Shuai Y.F. Liu and Ralf Rapp Categories: nucl-th cond-mat.quant-gas cond-mat.stat-mech hep-ph nucl-ex Comments: 9 pages, 6 figures. version published in Eur. Phys. J. A Journal-ref: Eur. Phys. J. A 56, 44 (2020) DOI: 10.1140/epja/s10050-020-00024-z \\ ( https://arxiv.org/abs/1612.09138 , 497kb) ------------------------------------------------------------------------------ \\ arXiv:1907.00237 replaced with revised version Fri, 27 Mar 2020 15:03:17 GMT (227kb,D) Title: A generalized Higgs potential with two degenerate minima for a dark QCD matter scenario Authors: Matthias F.M. Lutz, Yonggoo Heo and Xiao-Yu Guo Categories: hep-ph astro-ph.GA Comments: 8 pages, five figures, published version \\ ( https://arxiv.org/abs/1907.00237 , 227kb) ------------------------------------------------------------------------------ \\ arXiv:1908.10930 (*cross-listing*) replaced with revised version Thu, 26 Mar 2020 22:53:05 GMT (93kb,D) Title: Fundamental Forces and Scalar Field Dynamics in the Early Universe Authors: Alexander Kusenko, Volodymyr Takhistov, Masaki Yamada, Masahito Yamazaki Categories: hep-th astro-ph.CO hep-ph Comments: 6 pages, 1 figure; v2: publication version Report-no: IPMU19-0115 Journal-ref: Phys.Lett. B804 (2020) 135369 DOI: 10.1016/j.physletb.2020.135369 \\ ( https://arxiv.org/abs/1908.10930 , 93kb) ------------------------------------------------------------------------------ \\ arXiv:1910.02972 replaced with revised version Thu, 26 Mar 2020 23:13:58 GMT (140kb,D) Title: Exotic Spin-Dependent Forces from a Hidden Sector Authors: Alexandria Costantino, Sylvain Fichet, Philip Tanedo Categories: hep-ph Comments: 19 pages & appendices, 4 figures, 1 table. v2: Paragraph added for clarity, reference added, matches JHEP version Report-no: UCR-TR-2019-FLIP-NCC-1709 Journal-ref: Journal of High Energy Physics volume 2020, Article number: 148 DOI: 10.1007/JHEP03(2020)148 \\ ( https://arxiv.org/abs/1910.02972 , 140kb) ------------------------------------------------------------------------------ \\ arXiv:1910.09146 replaced with revised version Fri, 27 Mar 2020 07:01:15 GMT (227kb,D) Title: Inverse Mass Hierarchy of Light Scalar Mesons Driven by Anomaly-Induced Flavor Breaking Authors: Yoshiki Kuroda, Masayasu Harada, Shinya Matsuzaki, Daisuke Jido Categories: hep-ph Comments: 15 pages, 2 figures \\ ( https://arxiv.org/abs/1910.09146 , 227kb) ------------------------------------------------------------------------------ \\ arXiv:1911.03363 replaced with revised version Fri, 27 Mar 2020 12:15:51 GMT (210kb,D) Title: Soft leptogenesis in the NMSSM with a singlet right-handed neutrino superfield Authors: Waleed Abdallah, Abhass Kumar, Abhijit Kumar Saha Categories: hep-ph Comments: 22 pages, 7 figures, version accepted for publication in JHEP \\ ( https://arxiv.org/abs/1911.03363 , 210kb) ------------------------------------------------------------------------------ \\ arXiv:1911.05515 replaced with revised version Fri, 27 Mar 2020 08:44:49 GMT (1560kb,D) Title: Multi-component scalar dark matter from a $Z_N$ symmetry: a systematic analysis Authors: Carlos E. Yaguna and \'Oscar Zapata Categories: hep-ph Comments: 36 pages, 12 figures. v2: version accepted for publication DOI: 10.1007/JHEP03(2020)109 \\ ( https://arxiv.org/abs/1911.05515 , 1560kb) ------------------------------------------------------------------------------ \\ arXiv:1911.10805 replaced with revised version Fri, 27 Mar 2020 09:16:16 GMT (3067kb,D) Title: Nuclear EDM from SMEFT flavor-changing operator Authors: Motoi Endo and Daiki Ueda Categories: hep-ph hep-ex Comments: 21 pages, 15 figures \\ ( https://arxiv.org/abs/1911.10805 , 3067kb) ------------------------------------------------------------------------------ \\ arXiv:1912.06374 replaced with revised version Fri, 27 Mar 2020 14:01:22 GMT (6768kb,D) Title: Interference effects in dilepton resonance searches for Z' bosons and dark matter mediators Authors: Felix Kahlhoefer, Alexander M\"uck, Stefan Schulte, Patrick Tunney Categories: hep-ph hep-ex Comments: v2 matches version accepted by JHEP. 14 pages + appendices, 9 figures + 1 table, ZPEED code to calculate dilepton likelihoods available at http://github.com/kahlhoefer/ZPEED Report-no: TTK-19-53, MPP-2019-253 Journal-ref: JHEP 2003 (2020) 104 \\ ( https://arxiv.org/abs/1912.06374 , 6768kb) ------------------------------------------------------------------------------ \\ arXiv:1912.09999 replaced with revised version Fri, 27 Mar 2020 08:38:39 GMT (1446kb,D) Title: Off-shell vs on-shell modelling of top quarks in photon associated production Authors: G. Bevilacqua, H. B. Hartanto, M. Kraus, T. Weber and M. Worek Categories: hep-ph Comments: 31 pages, 11 figures, 2 tables, version to appear in JHEP Report-no: TTK-19-52, P3H-19-051, IPPP/19/98 \\ ( https://arxiv.org/abs/1912.09999 , 1446kb) ------------------------------------------------------------------------------ \\ arXiv:2002.12910 replaced with revised version Fri, 27 Mar 2020 15:58:14 GMT (3798kb,D) Title: Addressing $R_{D^{(*)}}$, $R_{K^{(*)}}$, muon $g-2$ and ANITA anomalies in a minimal $R$-parity violating supersymmetric framework Authors: Wolfgang Altmannshofer, P. S. Bhupal Dev, Amarjit Soni, Yicong Sui Categories: hep-ph hep-ex Comments: 33 pages, 24 figures, 5 tables; added more discussion and references \\ ( https://arxiv.org/abs/2002.12910 , 3798kb) ------------------------------------------------------------------------------ \\ arXiv:2003.04828 replaced with revised version Fri, 27 Mar 2020 06:15:20 GMT (1864kb,D) Title: Extracting the Transverse Momentum Dependent Polarizing Fragmentation Functions Authors: Daniel Callos, Zhong-Bo Kang, John Terry Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 9 pages, 7 figures, updated fit and improved text \\ ( https://arxiv.org/abs/2003.04828 , 1864kb) ------------------------------------------------------------------------------ \\ arXiv:2003.05487 replaced with revised version Fri, 27 Mar 2020 16:11:05 GMT (62kb,D) Title: Lorentz and permutation invariants of particles I Authors: Ben Gripaios, Ward Haddadin, and Christopher G. Lester Categories: hep-ph hep-th math-ph math.MP Comments: 18 pages, 3 Tables \\ ( https://arxiv.org/abs/2003.05487 , 62kb) ------------------------------------------------------------------------------ \\ arXiv:2003.11043 replaced with revised version Fri, 27 Mar 2020 10:10:06 GMT (5546kb,D) Title: Disentangling new physics effects on non-resonant Higgs boson pair production from gluon fusion Authors: Kingman Cheung, Adil Jueid, Chih-Ting Lu, Jeonghyeon Song, and Yeo Woong Yoon Categories: hep-ph hep-ex Comments: References are added: 29 pages with 8 figures \\ ( https://arxiv.org/abs/2003.11043 , 5546kb) ------------------------------------------------------------------------------ \\ arXiv:2003.11729 replaced with revised version Fri, 27 Mar 2020 01:11:45 GMT (67kb,D) Title: Pentaquark $P_c$ electroproduction in $J/\psi +p$ channel in electron-proton collisions Authors: Ya-Ping Xie, Xu Cao, Yu-Tie Liang and Xurong Chen Categories: hep-ph \\ ( https://arxiv.org/abs/2003.11729 , 67kb) ------------------------------------------------------------------------------ \\ arXiv:2003.11880 (*cross-listing*) replaced with revised version Fri, 27 Mar 2020 09:27:34 GMT (189kb,D) Title: Deep learning and k-means clustering in heterotic string vacua with line bundles Authors: Hajime Otsuka, Kenta Takemoto Categories: hep-th hep-ph Comments: 21 pages, 9 figures, typos corrected Report-no: KEK-TH-2200, WU-HEP-20-4 \\ ( https://arxiv.org/abs/2003.11880 , 189kb) ------------------------------------------------------------------------------ \\ arXiv:2003.12030 replaced with revised version Fri, 27 Mar 2020 16:59:34 GMT (140kb,D) Title: The three-loop QED contributions to the $g-2$ of charged leptons with two internal fermion loops and a class of Kamp\'e de F\'eriet series Authors: B. Ananthanarayan, Samuel Friot and Shayan Ghosh Categories: hep-ph Comments: 31 pages, 7 figures, uncertainties in Eq.(20) and some other typos corrected \\ ( https://arxiv.org/abs/2003.12030 , 140kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arxiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arxiv.org/help/