Date: Thu, 28 Jan 21 01:37:19 GMT Subject: hep-ex daily 6 new + 4 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-ex@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 26 Jan 21 19:00:00 GMT to Wed 27 Jan 21 19:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:2101.11261 Date: Wed, 27 Jan 2021 08:39:27 GMT (31kb,D) Title: On event-by-event pseudorapidity fluctuations in relativistic nuclear interactions Authors: M. Mohisin Khan, Danish F. Meer, Tahir Hussain, Nazeer Ahmad Categories: hep-ex \\ Present study is an attempt to have a detailed look into event-by-event(e-by-e) pseudorapidity fluctuations of the relativistic charged particles produced in $^{28}$Si-nucleus interactions at incident momenta 4.5A and 14.5A GeV/c.The method used in the present study makes use of a kinematic variable which is derived in terms of the average pseudo-rapidity and the total number of particles produced in a single event. The multiplicity and pseudorapidity dependence of these fluctuations have also been studied. The results obtained for the experimental data are compared with HIJING simulation. \\ ( https://arxiv.org/abs/2101.11261 , 31kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11395 Date: Wed, 27 Jan 2021 16:09:20 GMT (414kb,D) Title: Effect of new jet substructure measurements on Pythia8 tunes Authors: Deepak Kar and Pratixan Sarmah Categories: hep-ex hep-ph Comments: Masters project \\ This study used the recent ATLAS jet substructure measurements to see if any improvements can be made to the commonly used Pythia8 Monash and A14 tunes. \\ ( https://arxiv.org/abs/2101.11395 , 414kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11489 Date: Wed, 27 Jan 2021 15:39:23 GMT (86kb,D) Title: Parallelizing the Unpacking and Clustering of Detector Data for Reconstruction of Charged Particle Tracks on Multi-core CPUs and Many-core GPUs Authors: Giuseppe Cerati, Peter Elmer, Brian Gravelle, Matti Kortelainen, Vyacheslav Krutelyov, Steven Lantz, Mario Masciovecchio, Kevin McDermott, Boyana Norris, Allison Reinsvold Hall, Micheal Reid, Daniel Riley, Matev\v{z} Tadel, Peter Wittich, Bei Wang, Frank W\"urthwein, and Avraham Yagil Categories: hep-ex cs.DC \\ We present results from parallelizing the unpacking and clustering steps of the raw data from the silicon strip modules for reconstruction of charged particle tracks. Throughput is further improved by concurrently processing multiple events using nested OpenMP parallelism on CPU or CUDA streams on GPU. The new implementation along with earlier work in developing a parallelized and vectorized implementation of the combinatoric Kalman filter algorithm has enabled efficient global reconstruction of the entire event on modern computer architectures. We demonstrate the performance of the new implementation on Intel Xeon and NVIDIA GPU architectures. \\ ( https://arxiv.org/abs/2101.11489 , 86kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11573 Date: Wed, 27 Jan 2021 18:02:13 GMT (751kb,D) Title: Results and prospects of radiative and electroweak penguin decays at Belle II Authors: Soumen Halder (On behalf of the Belle II Collaboration) Categories: hep-ex Comments: 7 pages, 10 figures \\ The $b\to s(d)$ quark-level transitions are flavor-changing neutral current processes, which are not allowed at tree level in the standard model. These processes are very rare and constitute a potential probe for new physics. Belle II at SuperKEKB is a substantial upgrade of the Belle experiment. It aims to collect 50 ab$^{-1}$ of data with a design peak luminosity of $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ that is 40 times more than its predecessor. It has been recording data since 2019 and during these early days of the experiment, efforts are being made to detect early signals of the above decays. We report the first reconstrution in Belle II data of a $B\to K^{*}\gamma$ signal as well as future prospects for radiative and electroweak decays at Belle II. \\ ( https://arxiv.org/abs/2101.11573 , 751kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11582 Date: Wed, 27 Jan 2021 18:15:52 GMT (3126kb,D) Title: Search for pair production of third-generation scalar leptoquarks decaying into a top quark and a $\tau$-lepton in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector Authors: ATLAS Collaboration Categories: hep-ex Comments: 59 pages in total, author list starting page 43, 15 figures, 10 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2019-15/ Report-no: CERN-EP-2020-241 \\ A search for pair production of third-generation scalar leptoquarks decaying into a top quark and a $\tau$-lepton is presented. The search is based on a dataset of $pp$ collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb$^{-1}$. Events are selected if they have one light lepton (electron or muon) and at least one hadronically decaying $\tau$-lepton, or at least two light leptons. In addition, two or more jets, at least one of which must be identified as containing $b$-hadrons, are required. Six final states, defined by the multiplicity and flavour of lepton candidates, are considered in the analysis. Each of them is split into multiple event categories to simultaneously search for the signal and constrain several leading backgrounds. The signal-rich event categories require at least one hadronically decaying $\tau$-lepton candidate and exploit the presence of energetic final-state objects, which is characteristic of signal events. No significant excess above the Standard Model expectation is observed in any of the considered event categories, and 95% CL upper limits are set on the production cross section as a function of the leptoquark mass, for different assumptions about the branching fractions into $t\tau$ and $b\nu$. Scalar leptoquarks decaying exclusively into $t\tau$ are excluded up to masses of 1.43 TeV while, for a branching fraction of 50% into $t\tau$, the lower mass limit is 1.22 TeV. \\ ( https://arxiv.org/abs/2101.11582 , 3126kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11589 Date: Wed, 27 Jan 2021 18:34:58 GMT (4362kb,D) Title: A Convolutional Neural Network based Cascade Reconstruction for the IceCube Neutrino Observatory Authors: R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, A. A. Alves Jr., N. M. Amin, R. An, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Arg\"uelles, S. Axani, X. Bai, A. Balagopal V., A. Barbano, S. W. Barwick, B. Bastian, V. Basu, V. Baum, S. Baur, R. Bay, J. J. Beatty, K.-H. Becker, J. Becker Tjus, C. Bellenghi, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, S. B\"oser, O. Botner, J. B\"ottcher, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, S. Bron, J. Brostean-Kaiser, A. Burgman, R. S. Busse, M. A. Campana, C. Chen, D. Chirkin, S. Choi, B. A. Clark, K. Clark, L. Classen, A. Coleman, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, R. Cross, P. Dave, C. De Clercq, J. J. DeLaunay, H. Dembinski, et al. (302 additional authors not shown) Categories: hep-ex cs.LG Comments: 39 pages, 15 figures, submitted to Journal of Instrumentation \\ Continued improvements on existing reconstruction methods are vital to the success of high-energy physics experiments, such as the IceCube Neutrino Observatory. In IceCube, further challenges arise as the detector is situated at the geographic South Pole where computational resources are limited. However, to perform real-time analyses and to issue alerts to telescopes around the world, powerful and fast reconstruction methods are desired. Deep neural networks can be extremely powerful, and their usage is computationally inexpensive once the networks are trained. These characteristics make a deep learning-based approach an excellent candidate for the application in IceCube. A reconstruction method based on convolutional architectures and hexagonally shaped kernels is presented. The presented method is robust towards systematic uncertainties in the simulation and has been tested on experimental data. In comparison to standard reconstruction methods in IceCube, it can improve upon the reconstruction accuracy, while reducing the time necessary to run the reconstruction by two to three orders of magnitude. \\ ( https://arxiv.org/abs/2101.11589 , 4362kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:2101.11031 (*cross-listing*) Date: Tue, 26 Jan 2021 19:01:25 GMT (411kb,D) Title: Is a Miracle-less WIMP Ruled Out? Authors: Jason Arakawa, Tim M. P. Tait Categories: hep-ph hep-ex Comments: 14 pages, 10 figures Report-no: UCI-HEP-TR-2021-02 \\ We examine a real electroweak triplet scalar field as dark matter, abandoning the requirement that its relic abundance is determined through freeze out in a standard cosmological history (a situation which we refer to as a 'miracle-less WIMP'). We extract the bounds on such a particle from collider searches, searches for direct scattering with terrestrial targets, and searches for the indirect products of annihilation. Each type of search provides complementary information, and each is most effective in a different region of parameter space. LHC searches tend to be highly dependent on the mass of the SU(2) charged partner state, and are effective for very large or very tiny mass splitting between it and the neutral dark matter component. Direct searches are very effective at bounding the Higgs portal coupling, but ineffective once it falls below $\lambda_{\text{eff}} \lesssim 10^{-3}$. Indirect searches suffer from large astrophysical uncertainties due to the backgrounds and $J$-factors, but do provide key information for $\sim$ 100 GeV to TeV masses. Synthesizing the allowed parameter space, this example of WIMP dark matter remains viable, but only in miracle-less regimes. \\ ( https://arxiv.org/abs/2101.11031 , 411kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11160 (*cross-listing*) Date: Wed, 27 Jan 2021 01:37:51 GMT (49kb) Title: QCD effects in lepton angular distributions of Drell-Yan/$Z$ production and jet discrimination Authors: Wen-Chen Chang, Randall Evan McClellan, Jen-Chieh Peng and Oleg Teryaev Categories: hep-ph hep-ex nucl-ex Comments: 7 pages, 2 figures; contribution to the proceedings of 40th International Conference on High Energy physics (ICHEP2020), 28 July - 6 August 2020, Prague, Czech. arXiv admin note: text overlap with arXiv:1907.11356 Journal-ref: PoS(ICHEP2020)465 DOI: 10.22323/1.390.0465 \\ We present a comparison of data of lepton angular distributions of Drell-Yan/$Z$ production with the fixed-order pQCD calculations by which the baseline of pQCD effects is illustrated. As for the $Z$ production, we predict that $A_0$ and $A_2$ for $Z$ plus single gluon-jet events are very different from that of $Z$ plus single quark-jet events, allowing a new experimental tool for checking various algorithms which attempt to discriminate quark jets from gluon jets. Using an intuitive geometric approach, we show that the violation of the Lam-Tung relation, appearing at large transverse-momentum region, is attributed to the presence of a non-coplanarity effect. This interpretation is consistent with the appearance of violation beyond LO-QCD effect. \\ ( https://arxiv.org/abs/2101.11160 , 49kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11200 (*cross-listing*) Date: Wed, 27 Jan 2021 04:37:22 GMT (103kb,D) Title: Hidden-charm pentaquarks with triple strangeness due to the $\Omega_{c}^{(*)}\bar{D}_s^{(*)}$ interactions Authors: Fu-Lai Wang, Xin-Dian Yang, Rui Chen and Xiang Liu Categories: hep-ph hep-ex Comments: 11 pages, 3 figures and 7 tables. arXiv admin note: text overlap with arXiv:2011.14296 \\ Motivated by the successful interpretation of these observed $P_c$ and $P_{cs}$ states under the meson-baryon molecular picture, we systematically investigate the possible hidden-charm molecular pentaquark states with triple strangeness which is due to the $\Omega_{c}^{(*)}\bar{D}_s^{(*)}$ interactions. We perform a dynamical calculation of the possible hidden-charm molecular pentaquarks with triple strangeness by the one-boson-exchange model, where the $S$-$D$ wave mixing effect and the coupled channel effect are taken into account in our calculation. Our results suggest that the $\Omega_{c}\bar D_s^*$ state with $J^P={3}/{2}^{-}$ and the $\Omega_{c}^{*}\bar D_s^*$ state with $J^P={5}/{2}^{-}$ can be recommended as the candidates of the hidden-charm molecular pentaquark with triple strangeness. Furthermore, we discuss the two-body hidden-charm strong decay behaviors of these possible hidden-charm molecular pentaquarks with triple strangeness by adopting the quark-interchange model. These predictions are expected to be tested at the LHCb, which can be as a potential research issue with more accumulated experimental data in near future. \\ ( https://arxiv.org/abs/2101.11200 , 103kb) ------------------------------------------------------------------------------ \\ arXiv:2101.11521 (*cross-listing*) Date: Wed, 27 Jan 2021 16:24:54 GMT (112kb) Title: Angular analysis of bottom-flavored hadron production in semileptonic decays of polarized top quarks Authors: Bernd A. Kniehl and S. Mohammad Moosavi Nejad Categories: hep-ph hep-ex Comments: 16 pages, 6 figures; to appear in Physical Review D \\ We study the inclusive production of bottom-flavored hadrons from semileptonic decays of polarized top quarks at next-to-leading order in QCD using fragmentation functions recently determined from a global fit to $e^+e^-$ data. We provide the relevant differential decay widths at parton level in analytic form. These results fill an important gap in the theoretical interpretation of recent measurements of the top-quark polarization and the $t\bar{t}$ spin correlations using dilepton final states in proton-proton collisions at the CERN Large Hadron Collider. As an illustration, we study the distributions in the scaled bottom-hadron energy of the polarized-top-quark decay widths for different $W$-boson helicities. \\ ( https://arxiv.org/abs/2101.11521 , 112kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1902.06461 (*cross-listing*) replaced with revised version Wed, 27 Jan 2021 03:02:27 GMT (96kb) Title: Analysis of the $ \boldsymbol{e^+ e^- \to J/\psi D\bar D}$ reaction close to the threshold concerning claims of a $\chi_{c0}(2P)$ state Authors: En Wang, Wei-Hong Liang, Eulogio Oset Categories: hep-ph hep-ex Comments: 9 figures, 11 pages, the version to be published in EPJA \\ ( https://arxiv.org/abs/1902.06461 , 96kb) ------------------------------------------------------------------------------ \\ arXiv:2006.01348 (*cross-listing*) replaced with revised version Wed, 27 Jan 2021 04:26:35 GMT (2268kb,D) Title: Searching for GeV-scale Majorana Dark Matter: inter spem et metum Authors: Adil Jueid, Salah Nasri, Rachik Soualah Categories: hep-ph hep-ex Comments: 29 pages, 9 figures and 4 Tables. Added section about LHC constraints on the model, improved discussion on the implications at lepton colliders. Comments are welcome! \\ ( https://arxiv.org/abs/2006.01348 , 2268kb) ------------------------------------------------------------------------------ \\ arXiv:2007.14705 (*cross-listing*) replaced with revised version Wed, 27 Jan 2021 15:08:44 GMT (2332kb,D) Title: Detecting the Diffuse Supernova Neutrino Background in the future Water-based Liquid Scintillator Detector Theia Authors: Julia Sawatzki, Michael Wurm and Daniel Kresse Categories: physics.ins-det astro-ph.IM hep-ex hep-ph Journal-ref: Phys. Rev. D 103, 023021 (2021) DOI: 10.1103/PhysRevD.103.023021 \\ ( https://arxiv.org/abs/2007.14705 , 2332kb) ------------------------------------------------------------------------------ \\ arXiv:2008.11288 (*cross-listing*) replaced with revised version Tue, 26 Jan 2021 23:56:38 GMT (165kb,D) Title: Can a protophobic vector boson explain the ATOMKI anomaly? Authors: Xilin Zhang and Gerald A. Miller Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 8 pages, 4 figures, 1 table. Version close to the published: detailed discussions on multipoles and experimental signal (with a new figure) are included Report-no: NT@UW-20-07 Journal-ref: Phys.Lett.B 813 (2021) 136061 DOI: 10.1016/j.physletb.2021.136061 \\ ( https://arxiv.org/abs/2008.11288 , 165kb) ------------------------------------------------------------------------------ \\ arXiv:2010.00237 (*cross-listing*) replaced with revised version Wed, 27 Jan 2021 13:44:10 GMT (475kb,D) Title: Performance studies of Time-of-Flight detectors at LHC Authors: Karel \v{C}ern\'y, Marek Ta\v{s}evsk\'y, Tom\'a\v{s} S\'ykora, Radek \v{Z}leb\v{c}\'ik Categories: hep-ph hep-ex Comments: 27 pages, 9 figures \\ ( https://arxiv.org/abs/2010.00237 , 475kb) ------------------------------------------------------------------------------ \\ arXiv:2010.07149 (*cross-listing*) replaced with revised version Wed, 27 Jan 2021 17:24:57 GMT (227kb,D) Title: NLO QCD predictions for doubly-polarized WZ production at the LHC Authors: Ansgar Denner and Giovanni Pelliccioli Categories: hep-ph hep-ex Comments: 10 pages, 5 figures, 1 table, slightly extended version to appear in Phys. Lett. B \\ ( https://arxiv.org/abs/2010.07149 , 227kb) ------------------------------------------------------------------------------ \\ arXiv:2012.03620 (*cross-listing*) replaced with revised version Tue, 26 Jan 2021 12:45:18 GMT (4196kb,D) Title: Calibration of the momentum scale of a particle physics detector using the Armenteros-Podolanski plot Authors: Pablo Baladr\'on Rodr\'iguez, Veronika Chobanova, Xabier Cid Vidal, Vladimir Gligorov, Miriam Lucio Mart\'inez, Jovan Markov, Diego Mart\'inez Santos, M\'aximo Pl\'o Casas\'us Categories: physics.ins-det hep-ex hep-ph \\ ( https://arxiv.org/abs/2012.03620 , 4196kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/