Date: Mon, 29 Mar 21 00:33:37 GMT Subject: nucl-ex daily 1 new + 2 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: nucl-ex@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Thu 25 Mar 21 18:00:00 GMT to Fri 26 Mar 21 18:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:2103.14271 Date: Fri, 26 Mar 2021 05:47:41 GMT (826kb,D) Title: Proton-$\rm ^3He$ elastic scattering at intermediate energies Authors: A. Watanabe, S. Nakai, Y. Wada, K. Sekiguchi, A. Deltuva, T. Akieda, D. Etoh, M. Inoue, Y. Inoue, K. Kawahara, H. Kon, K. Miki, T. Mukai, D. Sakai, S. Shibuya, Y. Shiokawa, T. Taguchi, H. Umetsu, Y. Utsuki, M. Watanabe, S. Goto, K. Hatanaka, Y. Hirai, T. Ino, D. Inomoto, A. Inoue, S. Ishikawa, M. Itoh, H. Kanda, H. Kasahara, N. Kobayashi, Y. Maeda, S. Mitsumoto, S. Nakamura, K. Nonaka, H. J. Ong, H. Oshiro, Y. Otake, H. Sakai, A. Taketani, A. Tamii, D. T. Tran, T. Wakasa, Y. Wakabayashi, and T. Wakui Categories: nucl-ex nucl-th Comments: 22 pages, 6 figures \\ We present a precise measurement of the cross section, proton and $\rm ^3He$ analyzing powers, and spin correlation coefficient $C_{y,y}$ for $p$-$\rm ^3He$ elastic scattering near 65 MeV, and a comparison with rigorous four-nucleon scattering calculations based on realistic nuclear potentials and a model with $\Delta$-isobar excitation. Clear discrepancies are seen in some of the measured observables in the regime around the cross section minimum. Theoretical predictions using scaling relations between the calculated cross section and the $\rm ^3 He$ binding energy are not successful in reproducing the data. Large sensitivity to the $NN$ potentials and rather small $\Delta$-isobar effects in the calculated cross section are noticed as different features from those in the deuteron-proton elastic scattering. The results obtained above indicate that $p$-$\rm ^3He$ scattering at intermediate energies is an excellent tool to explore nuclear interactions not accessible by three-nucleon scattering. \\ ( https://arxiv.org/abs/2103.14271 , 826kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:2103.14089 (*cross-listing*) Date: Thu, 25 Mar 2021 19:12:25 GMT (344kb,D) Title: High precision measurements of Z boson production in PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV Authors: CMS Collaboration Categories: hep-ex nucl-ex Comments: Submitted to PRL. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-19-003 (CMS Public Pages) Report-no: CMS-HIN-19-003, CERN-EP-2021-039 \\ The CMS experiment at the LHC has measured the differential cross sections of Z bosons decaying to pairs of leptons, as functions of transverse momentum and rapidity, in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The measured Z boson elliptic azimuthal anisotropy coefficient is compatible with zero, showing that Z bosons do not experience significant final-state interactions in the medium produced in the collision. Yields of Z bosons are compared to Glauber model predictions and are found to deviate from these expectations in peripheral collisions, indicating the presence of initial collision geometry and centrality selection effects. The precision of the measurement allows, for the first time, for a data-driven determination of the nucleon-nucleon integrated luminosity as a function of lead-lead centrality, thereby eliminating the need for its estimation based on a Glauber model. \\ ( https://arxiv.org/abs/2103.14089 , 344kb) ------------------------------------------------------------------------------ \\ arXiv:2103.14440 (*cross-listing*) Date: Fri, 26 Mar 2021 12:47:56 GMT (611kb,D) Title: Effect of magnetic field on jet transport coefficient $\hat{q}$ Authors: Debjani Banerjee, Souvik Paul, Prottoy Das, Abhi Modak, Ankita Budhraja, Sabyasachi Ghosh, Sidharth K. Prasad Categories: hep-ph hep-ex hep-th nucl-ex nucl-th \\ We report the effect of magnetic field on estimation of jet transport coefficient, $\hat{q}$ using a simplified quasi-particle model. Our adopted quasi-particle model introduces temperature and magnetic field dependent degeneracy factors of partons, which are tuned by fitting the magneto-thermodynamical data of lattice quantum chromodynamics. In absence of magnetic field, $\hat{q}$ is estimated by using the temperature dependent degeneracy factor. At finite magnetic field, ${\hat q}$ splits into parallel and perpendicular components, whose magnetic field dependent part has two sources. One is field dependent degeneracy factor and another is phase space part, guided from shear viscosity to entropy density ratio. Their collective role provides an enhanced jet transport coefficients, which should be considered in detailed jet quenching phenomenology in presence of magnetic field. \\ ( https://arxiv.org/abs/2103.14440 , 611kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1906.09363 replaced with revised version Fri, 26 Mar 2021 09:03:37 GMT (1186kb,D) Title: Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at $\sqrt{s_{_\mathrm{NN}}}=200$ GeV Authors: STAR Collaboration Categories: nucl-ex Comments: 9 pages, 5 figures Journal-ref: Chinese Physics C 44, 104001 (2020) DOI: 10.1088/1674-1137/ab97a9 \\ ( https://arxiv.org/abs/1906.09363 , 1186kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/