The production of bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of . Measurements are performed in the channel using a data sample corresponding to an integrated luminosity of , 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 and transverse momentum . The boson differential cross sections, muon charge asymmetry, and the ratios of 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.

(2020). Observation of nuclear modifications in W± boson production in pPb collisions at √sNN=8.16TeV [journal article - articolo]. In PHYSICS LETTERS. SECTION B. Retrieved from http://hdl.handle.net/10446/150088

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

Re, V.;Vai, I.;
2020-01-01

Abstract

The production of bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of . Measurements are performed in the channel using a data sample corresponding to an integrated luminosity of , 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 and transverse momentum . The boson differential cross sections, muon charge asymmetry, and the ratios of 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.
articolo
2020
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Fl...espandi
(2020). Observation of nuclear modifications in W± boson production in pPb collisions at √sNN=8.16TeV [journal article - articolo]. In PHYSICS LETTERS. SECTION B. Retrieved from http://hdl.handle.net/10446/150088
File allegato/i alla scheda:
File Dimensione del file Formato  
1-s2.0-S0370269319307701-main.pdf

accesso aperto

Versione: publisher's version - versione editoriale
Licenza: Creative commons
Dimensione del file 1.14 MB
Formato Adobe PDF
1.14 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/150088
Citazioni
  • Scopus 32
  • ???jsp.display-item.citation.isi??? 23
social impact