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20th LOMONOSOV CONFERENCE ON ELEMENTARY PARTICLE PHYSICS
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PHENIX Results on Hadron Production in Large Collision Systems
Y.A. Berdnikov, A.Y. Berdnikov, D.O. Kotov, D.M. Larionovaa (PHENIX Collaboration) E-mail: adashalario@gmail.com
Peter the Great Saint-Petersburg Polytechnic University Received April 1, 2022
The paper presents recent PHENIX results on hadron production in heavy ion collisions. Comparison of light hadron (n0,n±,Ks,K±,K*, (p + p)/2,n,^,w) nuclear modification factors in Au+Au, Cu+Au collisions at \/snn =200 GeV and U+U collisions at N/sNN =192 GeV will be discussed. Keywords: : heavy ions, hadrons, QGP, nuclear modification factors. English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 232-233.
Towards New Physics through Precision:
Simultaneous Constraints on QCD Parameters and New Physics
Katerina Lipkaa, Toni Makela6 E-mail: aKaterina.Lipka@desy.de, 6 Toni.Maekelae@desy.de
University of Wuppertal and Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg Received January 15, 2022
The CMS measurements of inclusive jet production and of top quark-antiquark production in proton-proton collisions at the LHC at the center of mass energy of 13 TeV are used together with the data of inclusive deep inelastic scattering to extract the parton distribution functions in the proton, the top quark mass and the strong coupling constant. Using standard model predictions, the analysis at NNLO results in the most precise determination of the strong coupling constant at hadron collider. In an alternative analysis, the standard model is extended with effective couplings for 4-quark contact interactions, leading to the first simultaneous extraction of the standard model parameters and the Wilson coefficients of contact interactions using the LHC data.
Keywords: QCD, PDFs, jets, top quark mass, strong coupling constant, contact interactions, SMEFT.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 234-236.
Comparison of Methods for Elliptic Flow Measurements at NICA Energy Range
Vinh Ba Luong (for the MPD Collaboration) E-mail: VBLuong@mephi.ru
National Research Nuclear University MEPhl. Moscow, 115409, Russia Received January 16, 2022
The elliptic collective flow (v2) is one of the important observables sensitive to the transport properties of strongly interacting matter created in relativistic heavy-ion collisions. The performance of MPD detector at NICA for v2 measurements using two- and four-particle correlation methods is studied with simulations of Au+Au collisions at a/sTTjv = 7.7, 11.5 GeV.
Keywords: collective flow, correlations, relativistic heavy-ion collisions.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 237-238.
Relativistic Corrections to the Decay Width of the Higgs Boson
into a Pair of Bc Mesons
R.N. Faustov1,a, F.A. Martynenko2'6, A.P. Martynenko2'c E-mail: afaustov@ccas.ru, 6f.a.martynenko@gmail.com, ca.p.martynenko@samsu.ru
1FRC Computer Science and Control RAS. Moscow, 119333 Russia 2Samara University. Samara, 443086, Russia Received December 22, 2021
The investigation of rare production of the pair Bc-meson in the Higgs boson decay is presented. Relativisic amplitudes and decay widths are constructed on the basis of relativistic quark model with the account of the relative motion of heavy quarks.
Keywords: Higgs boson decays, relativistic quark model.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 239-240.
