Date: Wed, 27 Nov 19 01:32:39 GMT Subject: hep-ex daily 1 new + 8 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 Mon 25 Nov 19 19:00:00 GMT to Tue 26 Nov 19 19:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1911.11740 Date: Tue, 26 Nov 2019 18:21:43 GMT (91kb,D) Title: Measurements of the Absolute Branching Fractions of $B^\pm \to K^\pm X_{c\bar c}$ Authors: J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kozyrev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, K. Yu. Todyshev, A. J. Lankfordm, B. Dey, J. W. Gary, O. Long, A. M. Eisner, W. S. Lockman, W. Panduro Vazquez, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, D. G. Hitlin, J. Kim, Y. Li, T. S. Miyashita, P. Ongmongkolkul, F. C. Porter, M. Rohrken, Z. Huard, B. T. Meadows, B. G. Pushpawela, M. D. Sokoloff, L. Sun, J. G. Smith, S. R. Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, et al. (176 additional authors not shown) Categories: hep-ex Comments: 8 pages 6 figures Report-no: BABAR-PUB-18/04 , SLAC_PUB-17489 \\ A study of the two body decays $B^\pm\rightarrow X_{c\bar c}K^\pm$, where X$_{c\bar c}$ refers to one charmonium state, is reported by BaBar collaboration using a data sample of 424 fb$^{-1}$. The absolute determination of branching fractions for these decays are significantly improved compared to previous BaBaR measurements. Evidence is found for the decay $B^+\rightarrow X(3872)K^+$ at the $3\sigma$ level. The absolute branching fraction ${\cal B}(B^+\rightarrow X(3872)K^+) = (2.1\pm0.6({\rm stat})\pm0.3({\rm syst}))\times 10^{-4}$ is measured for the first time. It follows that ${\cal B}(X(3872)\rightarrow J/\psi\pi^+\pi^-)=(4.1\pm1.3)\%$, supporting the hypothesis of a molecular component for this resonance. \\ ( https://arxiv.org/abs/1911.11740 , 91kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1911.11235 (*cross-listing*) Date: Mon, 25 Nov 2019 21:14:20 GMT (1427kb,D) Title: The Time Substructure of Jets and Boosted Object Tagging Authors: Matthew D. Klimek Categories: hep-ph hep-ex Comments: 8 pages + references \\ We initiate the study of the time substructure of jets, motivated by the fact that the next generation of detectors at particle colliders will resolve the time scale over which jet constituents arrive. This effect is directly related to hadronization, which transforms partons into massive hadrons with a distribution of velocities. We review the basic predictions for the velocity distribution of jet hadrons, and suggest an application for this information in the context of boosted object tagging. By noting that the velocity distribution is determined by the properties of the color string which ends on the parton that initiates the jet, we observe that jets originating from boosted color singlets, such as Standard Model electroweak bosons, will exhibit velocity distributions that are boosted relative to QCD jets of similar jet energy. We find that by performing a simple cut on the corresponding distribution of charged hadron arrival times at the detector, we can discriminate against QCD jets that would otherwise give a false positive under a traditional spatial substructure based boosted object tagger. \\ ( https://arxiv.org/abs/1911.11235 , 1427kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11244 (*cross-listing*) Date: Mon, 25 Nov 2019 21:39:13 GMT (475kb,D) Title: Electroweak Loops as a Probe of New Physics in $t\bar{t}$ Production at the LHC Authors: Till Martini and Markus Schulze Categories: hep-ph hep-ex Comments: 12 pages, 7 figures Report-no: HU-EP-19/36 \\ We calculate the $\mathcal{O}(\alpha)$ weak corrections to top quark pair production at the LHC and include anomalous electroweak interactions from dimension-six operators. The loop calculation and renormalization are consistently done within the Standard Model Effective Field Theory. Sensitivity to the involved operators is exposed through the virtual corrections, which receive enhancement from electroweak Sudakov logarithms. We investigate the prospects of using this feature for probing New Physics at the LHC that so far has only been studied in final states with on-shell sensitivity such as $t\bar{t}+Z$ or $t \to b W$. We find that the large $t\bar{t}$ production rate and the excellent perturbative control allow compensating the loop suppression and yield remarkably strong constraints that are competitive with those from $t\bar{t}+Z$. \\ ( https://arxiv.org/abs/1911.11244 , 475kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11450 (*cross-listing*) Date: Tue, 26 Nov 2019 10:55:25 GMT (480kb,D) Title: Expanding Core-Collapse Supernova Search Horizon of Neutrino Detectors Authors: Odysse Halim, Carlo Vigorito, Claudio Casentini, Giulia Pagliaroli, Marco Drago, Viviana Fafone Categories: astro-ph.IM astro-ph.GA astro-ph.HE hep-ex physics.data-an Comments: 4 pages, 2 figures, this contribution was accepted by IOP Conference Series - proceedings services for science \\ Core-Collapse Supernovae, failed supernovae and quark novae are expected to release an energy of few $10^{53}$ ergs through MeV neutrinos and a network of detectors is operative to look online for these events. However, when the source distance increases and/or the average energy of emitted neutrinos decreases, the signal statistics drops and the identification of these low statistic astrophysical bursts could be challenging. In a standard search, neutrino detectors characterise the observed clusters of events with a parameter called multiplicity, i.e. the number of collected events in a fixed time-window. We discuss a new parameter called $\xi$ (=multiplicity/duration of the cluster) in order to add the information on the temporal behaviour of the expected signal with respect to background. By adding this parameter to the multiplicity we optimise the search of astrophysical bursts and we increase their detection horizon. Moreover, the use of the $\xi$ can be easily implemented in an online system and can apply also to a network of detectors like SNEWS. For these reasons this work is relevant in the multi-messengers era when fast alerts with high significance are mandatory. \\ ( https://arxiv.org/abs/1911.11450 , 480kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11577 (*cross-listing*) Date: Sun, 24 Nov 2019 16:14:29 GMT (2435kb,D) Title: Scintillating crystals for the Neutral Particle Spectrometer in Hall C at JLab Authors: T. Horn, V.V. Berdnikov, S. Ali, A. Asaturyan, M. Carmignotto, J. Crafts, A. Demarque, R. Ent, G. Hull, H.-S. Ko, M. Mostafavi, C. Munoz-Camacho, A. Mkrtchyan, H. Mkrtchyan, T. Nguyen Trung, I.L. Pegg, E. Rindel, A. Somov, V. Tadevosyan, R. Trotta, S. Zhamkochyan, R. Wang, S.A. Wood Categories: physics.ins-det hep-ex nucl-ex Comments: 20 pages, 30 figures \\ This paper discusses the quality and performance of currently available PbWO$_4$ crystals of relevance to high-resolution electromagnetic calorimetry, e.g. detectors for the Neutral Particle Spectrometer at Jefferson Lab or those planned for the Electron-Ion Collider. Since the construction of the Compact Muon Solenoid (CMS) at the Large Hadron Collider (LHC) and early PANDA (The antiProton ANnihilations at DArmstadt) electromagnetic calorimeter (ECAL) the worldwide availability of high quality PbWO$_4$ production has changed dramatically. We report on our studies of crystal samples from SICCAS/China and CRYTUR/Czech Republic that were produced between 2014 and 2019. \\ ( https://arxiv.org/abs/1911.11577 , 2435kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11681 (*cross-listing*) Date: Tue, 26 Nov 2019 16:32:38 GMT (222kb) Title: Exclusive $\pi^+$ electroproduction off the proton from low to high -t Authors: S. Basnet, G.M. Huber, W.B. Li, H.P. Blok, D. Gaskell, T. Horn, K. Aniol, J. Arrington, E.J. Beise, W. Boeglin, E.J. Brash, H. Breuer, C.C. Chang, M.E. Christy, R. Ent, E. Gibson, R.J. Holt, S. Jin, M.K. Jones, C.E. Keppel, W. Kim, P.M. King, V. Kovaltchouk, J. Liu, G.J. Lolos, D.J. Mack, D.J. Margaziotis, P. Markowitz, A. Matsumura, D. Meekins, T. Miyoshi, H. Mkrtchyan, I. Niculescu, Y. Okayasu, L. Pentchev, C. Perdrisat, D. Potterveld, V. Punjabi, P. Reimer, J. Reinhold, J. Roche, A. Sarty, G.R. Smith, V. Tadevosyan, L.G. Tang, V. Tvaskis, J. Volmer, W. Vulcan, G. Warren, S.A. Wood, C. Xu, X. Zheng Categories: nucl-ex hep-ex Comments: 9 pages, 5 figures Physical Review C, in press \\ Background: Measurements of exclusive meson production are a useful tool in the study of hadronic structure. In particular, one can discern the relevant degrees of freedom at different distance scales through these studies. Purpose: To study the transition between non-perturbative and perturbative Quantum Chromodyanmics as the square of four momentum transfer to the struck proton, -t, is increased. Method: Cross sections for the $^1$H(e,e'$\pi^+$)n reaction were measured over the -t range of 0.272 to 2.127 GeV$^2$ with limited azimuthal coverage at fixed beam energy of 4.709 GeV, Q$^2$ of 2.4 GeV$^2$ and W of 2.0 GeV at the Thomas Jefferson National Accelerator Facility (JLab) Hall C. Results: The -t dependence of the measured $\pi^+$ electroproduction cross section generally agrees with prior data from JLab Halls B and C. The data are consistent with a Regge amplitude based theoretical model, but show poor agreement with a Generalized Parton Distribution (GPD) based model. Conclusion: The agreement of cross sections with prior data implies small contribution from the interference terms, and the confirmation of the change in t-slopes between the low and high -t regions previously observed in photoproduction indicates the changing nature of the electroproduction reaction in our kinematic regime. \\ ( https://arxiv.org/abs/1911.11681 , 222kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11706 (*cross-listing*) Date: Tue, 26 Nov 2019 17:20:48 GMT (153kb) Title: Sub-threshold $J/\psi$ and $\Upsilon$ Production in $\gamma A$ Collisions Authors: Yoshitaka Hatta (BNL), Mark Strikman (PSU), Ji Xu (SJTU), Feng Yuan (LBNL) Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 7 pages, 5 figures \\ We study sub-threshold heavy quarkonium ($J/\psi$ and $\Upsilon$) photo-productions in $\gamma A$ collisions as an independent test of the universality of the nucleon-nucleon short range correlation (SRC) in nuclear scattering processes. Just below the $\gamma p$ threshold, the cross section is dominated by the mean field contribution of nucleons inside the nucleus. The SRC contributions start to dominate at lower photon energies, depending on the fraction of the SRC pairs in the target nucleus. We give an estimate of the cross sections in the sub-threshold region both for $J/\psi$ and $\Upsilon$. This may be helpful for future measurements at JLab as well as at the Electron-Ion Collider in the U.S., and especially in China. \\ ( https://arxiv.org/abs/1911.11706 , 153kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11717 (*cross-listing*) Date: Tue, 26 Nov 2019 17:46:35 GMT (4548kb,D) Title: DeepRICH: Learning Deeply Cherenkov Detectors Authors: Cristiano Fanelli and Jary Pomponi Categories: physics.data-an cs.LG hep-ex nucl-ex physics.ins-det Comments: 28 pages, 11 figures, preprint \\ Imaging Cherenkov detectors are largely used for particle identification (PID) in nuclear and particle physics experiments, where developing fast reconstruction algorithms is becoming of paramount importance to allow for near real time calibration and data quality control, as well as to speed up offline analysis of large amount of data. In this paper we present DeepRICH, a novel deep learning algorithm for fast reconstruction which can be applied to different imaging Cherenkov detectors. The core of our architecture is a generative model which leverages on a custom Variational Auto-encoder (VAE) combined to Maximum Mean Discrepancy (MMD), with a Convolutional Neural Network (CNN) extracting features from the space of the latent variables for classification. A thorough comparison with the simulation/reconstruction package FastDIRC is discussed in the text. DeepRICH has the advantage to bypass low-level details needed to build a likelihood, allowing for a sensitive improvement in computation time at potentially the same reconstruction performance of other established reconstruction algorithms. In the conclusions, we address the implications and potentialities of this work, discussing possible future extensions and generalization. \\ ( https://arxiv.org/abs/1911.11717 , 4548kb) ------------------------------------------------------------------------------ \\ arXiv:1911.11755 (*cross-listing*) Date: Tue, 26 Nov 2019 18:46:53 GMT (12657kb,D) Title: AION: An Atom Interferometer Observatory and Network Authors: L. Badurina, E. Bentine, D. Blas, K. Bongs, D. Bortoletto, T. Bowcock, K. Bridges, W. Bowden, O. Buchmueller, C. Burrage, J. Coleman, G. Elertas, J. Ellis, C. Foot, V. Gibson, M. G. Haehnelt, T. Harte, S. Hedges, R. Hobson, M. Holynski, T. Jones, M. Langlois, S. Lellouch, M. Lewicki, R. Maiolino, P. Majewski, S. Malik, J. March-Russell, C. McCabe, D. Newbold, B. Sauer, U. Schneider, I. Shipsey, Y. Singh, M. A. Uchida, T. Valenzuela, M. van der Grinten, V. Vaskonen, J. Vossebeld, D. Weatherill, I. Wilmut Categories: astro-ph.CO gr-qc hep-ex hep-ph physics.atom-ph Report-no: AION-2019-001 \\ We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory and Network), a proposed UK-based experimental programme using cold strontium atoms to search for ultra-light dark matter, to explore gravitational waves in the mid-frequency range between the peak sensitivities of the LISA and LIGO/Virgo/ KAGRA/INDIGO/Einstein Telescope/Cosmic Explorer experiments, and to probe other frontiers in fundamental physics. AION would complement other planned searches for dark matter, as well as probe mergers involving intermediate mass black holes and explore early universe cosmology. AION would share many technical features with the MAGIS experimental programme in the US, and synergies would flow from operating AION in a network with this experiment, as well as with other atom interferometer experiments such as MIGA, ZAIGA and ELGAR. Operating AION in a network with other gravitational wave detectors such as LIGO, Virgo and LISA would also offer many synergies. \\ ( https://arxiv.org/abs/1911.11755 , 12657kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1812.09018 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 03:40:49 GMT (6462kb,D) Title: COMET Phase-I Technical Design Report Authors: The COMET Collaboration: R. Abramishvili, G. Adamov, R. R. Akhmetshin, A. Allin, J. C. Ang\'elique, V. Anishchik, M. Aoki, D. Aznabayev, I. Bagaturia, G. Ban, Y. Ban, D. Bauer, D. Baygarashev, A. E. Bondar, C. C\^arloganu, B. Carniol, T. T. Chau, J. K. Chen, S. J. Chen, Y. E. Cheung, W. da Silva, P. D. Dauncey, C. Densham, G. Devidze, P. Dornan, A. Drutskoy, V. Duginov, Y. Eguchi, L. B. Epshteyn, P. Evtoukhovich, S. Fayer, G. V. Fedotovich, M. Finger Jr, M. Finger, Y. Fujii, Y. Fukao, J. L. Gabriel, P. Gay, E. Gillies, D. N. Grigoriev, K. Gritsay, V. H. Hai, E. Hamada, I. H. Hashim, S. Hashimoto, O. Hayashi, T. Hayashi, T. Hiasa, Z. A. Ibrahim, Y. Igarashi, F. V. Ignatov, M. Iio, K. Ishibashi, A. Issadykov, T. Itahashi, A. Jansen, X. S. Jiang, P. Jonsson, T. Kachelhoffer, V. Kalinnikov, E. Kaneva, et al. (133 additional authors not shown) Categories: physics.ins-det hep-ex \\ ( https://arxiv.org/abs/1812.09018 , 6462kb) ------------------------------------------------------------------------------ \\ arXiv:1902.01375 replaced with revised version Tue, 26 Nov 2019 18:34:45 GMT (798kb) Title: A Measurement of the Branching Ratio of $\pi^0$ Dalitz Decay using $K_L \rightarrow \pi^0\pi^0\pi^0$ Decays Authors: E. Abouzaid, M. Arenton, A.R. Barker, L. Bellantoni, E. Blucher, G.J. Bock, E. Cheu, R. Coleman, M.D. Corcoran, B. Cox, A.R. Erwin, C.O. Escobar, A. Glazov, A. Golossanov, R.A. Gomes, P. Gouffon, Y.B. Hsiung, D.A. Jensen, R. Kessler, K. Kotera, A. Ledovskoy, P.L. McBride, E. Monnier, H. Nguyen, R. Niclasen, D.G. Phillips II, E.J. Ramberg, R.E. Ray, M. Ronquest, E. Santos, W. Slater, D. Smith, N. Solomey, E.C. Swallow, P.A. Toale, R. Tschirhart, Y.W. Wah, J. Wang, H.B. White, J. Whitmore, M. J. Wilking, B. Winstein, R. Winston, E.T. Worcester, T. Yamanaka, E. D. Zimmerman, R.F. Zukanovich Categories: hep-ex Comments: 11 pages, 7 figures; v2 accepted version Report-no: FERMILAB-PUB-19-049-PPD, BNL-211906-2019-JAAM Journal-ref: Phys. Rev. D 100, 032003 (2019) DOI: 10.1103/PhysRevD.100.032003 \\ ( https://arxiv.org/abs/1902.01375 , 798kb) ------------------------------------------------------------------------------ \\ arXiv:1904.12889 replaced with revised version Tue, 26 Nov 2019 03:11:49 GMT (210kb,D) Title: Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory Authors: L. T. Yang, H. B. Li, Q. Yue, H. Ma, K. J. Kang, Y. J. Li, H. T. Wong, M. Agartioglu, H. P. An, J. P. Chang, J. H. Chen, Y. H. Chen, J. P. Cheng, Z. Deng, Q. Du, H. Gong, Q. J. Guo, L. He, J. W. Hu, Q. D. Hu, H. X. Huang, L. P. Jia, H. Jiang, H. Li, J. M. Li, J. Li, X. Li, X. Q. Li, Y. L. Li, B. Liao, F. K. Lin, S. T. Lin, S. K. Liu, Y. D. Liu, Y. Y. Liu, Z. Z. Liu, J. L. Ma, Y. C. Mao, H. Pan, J. Ren, X. C. Ruan, V. Sharma, Z. She, M. B. Shen, L. Singh, M. K. Singh, T. X. Sun, C. J. Tang, W. Y. Tang, Y. Tian, G. F. Wang, J. M. Wang, L. Wang, Q. Wang, Y. Wang, Y. X. Wang, S. Y. Wu, Y. C. Wu, H. Y. Xing, Y. Xu, T. Xue, N. Yi, C. X. Yu, H. J. Yu, J. F. Yue, X. H. Zeng, M. Zeng, Z. Zeng, F. S. Zhang, Y. H. Zhang, M. G. Zhao, J. F. Zhou, Z. Y. Zhou, J. J. Zhu, Z. H. Zhu Categories: hep-ex hep-ph physics.ins-det Comments: 5 pages, 4 figures Journal-ref: Phys. Rev. Lett. 123, 221301 (2019) DOI: 10.1103/PhysRevLett.123.221301 \\ ( https://arxiv.org/abs/1904.12889 , 210kb) ------------------------------------------------------------------------------ \\ arXiv:1908.02097 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 00:41:53 GMT (299kb) Title: Nucleon spin polarization in intermediate-energy heavy-ion collisions Authors: Yin Xia and Jun Xu Categories: nucl-th hep-ex nucl-ex Comments: 7 pages, 6 figures \\ ( https://arxiv.org/abs/1908.02097 , 299kb) ------------------------------------------------------------------------------ \\ arXiv:1908.04048 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 07:11:44 GMT (373kb,D) Title: F2F, a model-independent method to determine the mass and width of a particle in the presence of interference Authors: Li-Gang Xia Categories: hep-ph hep-ex Comments: 18 pages, typo fixed, add sections on higgs width measurement and new resonance search \\ ( https://arxiv.org/abs/1908.04048 , 373kb) ------------------------------------------------------------------------------ \\ arXiv:1908.04677 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 13:30:48 GMT (8362kb,D) Title: Form factors of $V'\to V''$ transition within the light-front quark models Authors: Qin Chang, Li-Ting Wang and Xiao-Nan Li Categories: hep-ph hep-ex Comments: 47pages, 6 figures, 10 tables. Revised version; Accepted for publication in JHEP \\ ( https://arxiv.org/abs/1908.04677 , 8362kb) ------------------------------------------------------------------------------ \\ arXiv:1910.00793 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 04:42:01 GMT (3015kb,D) Title: Exploiting higher-order resonant modes for axion haloscopes Authors: Jinsu Kim, SungWoo Youn, Junu Jeong, Woohyun Chung, Ohjoon Kwon, and Yannis K. Semertzidis Categories: physics.ins-det hep-ex Comments: 14 pages, 10 figures \\ ( https://arxiv.org/abs/1910.00793 , 3015kb) ------------------------------------------------------------------------------ \\ arXiv:1910.11597 (*cross-listing*) replaced with revised version Tue, 26 Nov 2019 08:35:09 GMT (0kb,I) Title: Three Photon Decay of $J/\psi$ from Lattice QCD Authors: Yu Meng, Chuan Liu, Ke-Long Zhang Categories: hep-lat hep-ex hep-ph Comments: 6 pages 5 figures. The method proposed needs to be further cross-checked in simpler cases, e.g. in two-photon decays, before it was applied to the more complicated case such as this one \\ ( https://arxiv.org/abs/1910.11597 , 0kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/