Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV

Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Adžić, Petar; Ćirković, Predrag; Devetak, Damir; Đorđević, Miloš; Milošević, Jovan

doi:10.1016/j.physletb.2019.135048

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Abstract

The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of sNN=8.16TeV. Measurements are performed in the W±→μ±νμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1nb−1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ηlab μ|<2.4 and transverse momentum pT μ>25GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on ...

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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2020, 800, 135048-

DOI: 10.1016/j.physletb.2019.135048

ISSN: 0370-2693

WoS: 000503832500038

Scopus: 2-s2.0-85076613850

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https://vinar.vin.bg.ac.rs/handle/123456789/8766

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TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8766
AB  - The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of sNN=8.16TeV. Measurements are performed in the W±→μ±νμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1nb−1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ηlab μ|<2.4 and transverse momentum pT μ>25GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits. © 2019 The Author(s)
T2  - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
T1  - Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV
VL  - 800
SP  - 135048
DO  - 10.1016/j.physletb.2019.135048
ER  -

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan",
year = "2020",
abstract = "The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of sNN=8.16TeV. Measurements are performed in the W±→μ±νμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1nb−1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ηlab μ|<2.4 and transverse momentum pT μ>25GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits. © 2019 The Author(s)",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
title = "Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV",
volume = "800",
pages = "135048",
doi = "10.1016/j.physletb.2019.135048"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2020). Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 800, 135048.
https://doi.org/10.1016/j.physletb.2019.135048

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2020;800:135048.
doi:10.1016/j.physletb.2019.135048 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Observation of nuclear modifications in W± boson production in pPb collisions at sNN=8.16TeV" in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 800 (2020):135048,
https://doi.org/10.1016/j.physletb.2019.135048 . .