Please use this identifier to cite or link to this item:
Title: ϒ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV
Authors: Khachatryan, V
Sirunyan, AM
Tumasyan, A
Adam, W
Asilar, E
Bergauer, T
Brandstetter, J
Brondolin, E
Dragicevic, M
Erö, J
Fabjan, C
Flechl, M
Friedl, M
Frühwirth, R
Ghete, VM
Hartl, C
Hörmann, N
Hrubec, J
Jeitler, M
Knünz, V
König, A
Krammer, M
Krätschmer, I
Liko, D
Matsushita, T
Mikulec, I
Rabady, D
Rad, N
Rahbaran, B
Rohringer, H
Schieck, J
Schöfbeck, R
Strauss, J
Treberer-Treberspurg, W
Waltenberger, W
Wulz, CE
Mossolov, V
Shumeiko, N
Suarez Gonzalez, J
Alderweireldt, S
Cornelis, T
De Wolf, EA
Janssen, X
Knutsson, A
Lauwers, J
Luyckx, S
Van De Klundert, M
Van Haevermaet, H
Van Mechelen, P
Van Remortel, N
Van Spilbeeck, A
Abu Zeid, S
Blekman, F
D'Hondt, J
Daci, N
De Bruyn, I
Deroover, K
Heracleous, N
Keaveney, J
Lowette, S
Moreels, L
Olbrechts, A
Python, Q
Strom, D
Tavernier, S
Van Doninck, W
Van Mulders, P
Van Onsem, GP
Van Parijs, I
Barria, P
Brun, H
Caillol, C
Clerbaux, B
De Lentdecker, G
Fang, W
Fasanella, G
Favart, L
Goldouzian, R
Grebenyuk, A
Karapostoli, G
Lenzi, T
Léonard, A
Maerschalk, T
Marinov, A
Perniè, L
Randle-conde, A
Seva, T
Vander Velde, C
Vanlaer, P
Yonamine, R
Zenoni, F
Zhang, F
Beernaert, K
Benucci, L
Cimmino, A
Crucy, S
Dobur, D
Fagot, A
Garcia, G
Gul, M
Keywords: CMS;Physics;Quarkonium production;Quarkonium polarization;QCD medium effects
Issue Date: 2016
Publisher: Elsevier
Citation: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 761: pp. 31 - 52,(2016)
Abstract: The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|>1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S) and ϒ(3S) cases.
ISSN: 0370-2693
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

Files in This Item:
File Description SizeFormat 
Fulltext.pdf911.72 kBAdobe PDFView/Open

Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.