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http://bura.brunel.ac.uk/handle/2438/19917| Title: | Observation of nuclear modifications in W± boson production in pPb collisions at √sNN = 8.16 TeV |
| Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Asilar, E Bergauer, T Brandstetter, J Dragicevic, M Erö, J Escalante Del Valle, A Flechl, M Frühwirth, R Ghete, VM Hrubec, J Jeitler, M Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Rad, N Rohringer, H Schieck, J Schöfbeck, R Spanring, M Spitzbart, D Taurok, A Waltenberger, W Wittmann, J Wulz, CE Zarucki, M Chekhovsky, V Mossolov, V Suarez Gonzalez, J De Wolf, EA Di Croce, D Janssen, X Lauwers, J Pieters, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Abu Zeid, S Blekman, F D'Hondt, J De Bruyn, I De Clercq, J Deroover, K Flouris, G Lontkovskyi, D Lowette, S Marchesini, I Moortgat, S Moreels, L Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Beghin, D Bilin, B Brun, H Clerbaux, B Zahid, S De Lentdecker, G Delannoy, H Dorney, B Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Teodorescu, L Kalsi, AK Lenzi, T Luetic, J Postiau, N Starling, E Thomas, L Reid, ID Vander Velde, C Vanlaer, P Vannerom, D Wang, Q Cornelis, T Morton, A Dobur, D Fagot, A Gul, M Khvastunov, I Mackay, CK Poyraz, D Roskas, C Trocino, D Tytgat, M Verbeke, W Vermassen, B Vit, M Zaganidis, N Bakhshiansohi, H Bondu, O Brochet, S Kyberd, P Bruno, G Caputo, C Khan, A David, P Hobson, PE Cole, JE |
| Keywords: | CMS;heavy ions;electroweak;W boson;pPb |
| Issue Date: | 24-Oct-2019 |
| Publisher: | Elsevier |
| Citation: | CMS Collaboration, Sirunyan, A.M., Tumasyan, A. et al. (2019) 'Observation of nuclear modifications in W± boson production in pPb collisions at √sNN = 8.16 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 800, 135048, pp. 1-24. doi: 10.1016/j.physletb.2019.135048. |
| Abstract: | Copyright © 2019 The Author(s). 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 |ηlabμ|<2.4 and transverse momentum pTμ>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. |
| URI: | https://bura.brunel.ac.uk/handle/2438/19917 |
| DOI: | https://doi.org/10.1016/j.physletb.2019.135048 |
| ISSN: | 0370-2693 |
| Other Identifiers: | 135048 |
| Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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