Study of Drell – Yan processes with the compact muon solenoid experiment at Large Hadron Collider

  • Ilya N. Gorbunov Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia
  • Alexander V. Lanyov Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia
  • Vladislav V. Shalaev Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia; Dubna State University, 6 Universitetskaya Street, Dubna 141982, Moscow region, Russia
  • Sergey V. Shmatov Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia
DOI: https://doi.org/10.33581/2520-2243-2019-2-16-25

Abstract

The results of measurements of the differential and double-differential cross sections (dσ/dM and d2σ/dMdy) of Drell – Yan processes in proton-proton collisions at 7 and 8 TeV in c. m. s. are presented. The double-differential cross section d2σ/dMdy has been studied in the range of the Bjorken scaling variable values 0.0003 < x± < 1.0 and the evolution scale 600 < Q2 < 750000 (GeV2/c2), and the differential cross section dσ/dM has been explored in a wider range 300 < Q2 < 3000000 (GeV2/c2). The measurements were performed in a combined channel with a pair of electrons and muons and are based on the experimental data of the Compact Muon Solenoid (CMS), collected during the first Large Hadron Collider (LHC) Run in 2011 and 2012. The statistic is corresponding to integrated luminosity of 5.1 fb–1 at 7 TeV and 20.6 fb–1 at 8 TeV. The measurements of the lepton forward-backward asymmetry AFB and the angular coefficients Ai are also discussed. These results agree within the uncertainty with the predictions of the standard model in the leading and next-to-leading orders.

Author Biographies

Ilya N. Gorbunov, Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia

PhD (physics and mathematics); senior researcher at the scientific experimental department of physics at CMS, Veksler and Baldin laboratory of high energy physics

Alexander V. Lanyov, Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia

PhD (physics and mathematics); leading researcher at the Veksler and Baldin laboratory of high energy physics

Vladislav V. Shalaev, Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia; Dubna State University, 6 Universitetskaya Street, Dubna 141982, Moscow region, Russia

engineer at the scientific experimental department of physics at CMS, Veksler and Baldin laboratory of high energy physics, Joint Institute for Nuclear Research, and postgraduate student at the department of biophysics, faculty of natural and engineering sciences, Dubna State University

Sergey V. Shmatov, Joint Institute for Nuclear Research, 6 Zholio Kyuri Street, Dubna 141980, Moscow region, Russia

PhD (physics and mathematics); head at the department No. 1 of a new physics at CMS

References

  1. Golutvin IA, Shmatov SV. [Results and prospects of research on the CMS LHC experiment]. Fizika elementarnykh chastits i atomnogo yadra. 2017;48(5):604 – 616. Russian.
  2. Shmatov SV. [Some results of BSM physic searching with the CMS experiment at the CERN LHC]. Fizika elementarnykh chastits i atomnogo yadra. 2018;49(4):1291–1301. Russian.
  3. Shmatov SV. Searches for physics beyond the standard model in proton-proton interactions at s = 7 TeV in the CMS experiment at the LHC. Yadernaya fizika. 2013;76(9):1166 –1174. DOI: 10.7868/S0044002713090195. Russian.
  4. Lanev AV. [CMS collaboration results of searching heavy dilepton and diphoton resonanсes]. Fizika elementarnykh chastits i atomnogo yadra. 2017:48(5);677– 683. Russian.
  5. Lanev AV. [CMS collaboration results: Higgs boson and searching of a new physic]. Uspekhi fizicheskikh nauk. 2014;184:996. DOI: 10.3367/UFNr.0184.201409i.0996.
  6. Chatrchyan S, Hmayakyan G, Khachatryan V, Sirunyan AM, Adam W, Bauer T, et al. (CMS collaboration). The CMS experiment at the CERN LHC. Journal of Instrumentation. 2008;3:S08004. DOI: 10.1088/1748-0221/3/08/S08004.
  7. Drell SD, Yan T-M. Massive lepton pair production in hadron-hadron collisions at high-energies. Physical Review Letters. 1970;25(5):316 –320. DOI: 10.1103/PhysRevLett.25.316.
  8. Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, et al. (CMS collaboration). Measurements of differential and double-differential Drell – Yan cross sections in proton-proton collisions at s = 8 TeV. European Physical Journal C. 2015;75:147. DOI: 10.1140/epjc/s10052-015-3364-2.
  9. Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, et al. (CMS collaboration). Angular coefficients of Z bosons produced in pp collisions at s = 8 TeV and decaying to m + m – as a function of transverse momentum and rapidity. Physical Letters B. 2015;750:154–175. DOI: 10.1016/j.physletb.2015.08.061.
  10. Lam CS, Tung W-K. Systematic approach to inclusive lepton pair production in hadronic collisions. Physical Review D. 1978;18:2447. DOI: 10.1103/PhysRevD.18.2447.
  11. Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, et al. (CMS collaboration). Forward-backward asymmetry of Drell – Yan lepton pairs in pp collisions at s = 8 TeV. European Physical Journal C. 2016;76:325. DOI: 10.1140/epjc/s10052-016-4156-z.
  12. Chatrchyan S, Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Bergauer T, et al. (CMS collaboration). Forward-backward asymmetry of Drell – Yan lepton pairs in pp collisions at s = 7 TeV. Physical Letters B. 2013;718(3):752–772. DOI: 10.1016/j.physletb.2012.10.082.
Published
2019-05-24
Keywords: Large Hadron Collider, CMS experiment, Drell – Yan process, differential cross section, angular coefficients, forward-backward asymmetry
How to Cite
Gorbunov, I. N., Lanyov, A. V., Shalaev, V. V., & Shmatov, S. V. (2019). Study of Drell – Yan processes with the compact muon solenoid experiment at Large Hadron Collider. Journal of the Belarusian State University. Physics, 2, 16-25. https://doi.org/10.33581/2520-2243-2019-2-16-25
Issue
No 2 (2019): Journal of the Belarusian State University. Physics
Section
Atomic Nucleus and Elementary Particle Physics

Copyright (c) 2019 Journal of the Belarusian State University. Physics

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

The authors who are published in this journal agree to the following:

  1. The authors retain copyright on the work and provide the journal with the right of first publication of the work on condition of license Creative Commons Attribution-NonCommercial. 4.0 International (CC BY-NC 4.0).
  2. The authors retain the right to enter into certain contractual agreements relating to the non-exclusive distribution of the published version of the work (e.g. post it on the institutional repository, publication in the book), with the reference to its original publication in this journal.
  3. The authors have the right to post their work on the Internet (e.g. on the institutional store or personal website) prior to and during the review process, conducted by the journal, as this may lead to a productive discussion and a large number of references to this work. (See The Effect of Open Access.)