Title: | Measurements of the ϒ(1S), ϒ(2S), and ϒ(3S) differential cross sections in pp collisions at √s= 7 TeV |
Authors: | Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Erö, J Friedl, M Frühwirth, R Frühwirth, R Ghete, VM Zenoni, F Adler, V Beernaert, K Benucci, L Cimmino, A Teodorescu, L Costantini, S Crucy, S Dildick, S Fagot, A Leslie, D Garcia, G Mccartin, J Ocampo Rios, AA Kyberd, P Poyraz, D Ryckbosch, D Khan, A Salva Diblen, S Hobson, PR Cole, JE Hartl, C Hörmann, N Hrubec, J Jeitler, M Jeitler, M Kiesenhofer, W Knünz, V Krammer, M Krammer, M Krätschmer, I Liko, D Mikulec, I Rabady, D Rabady, D Rahbaran, B Rohringer, H Schöfbeck, R Strauss, J Treberer-Treberspurg, W Waltenberger, W Wulz, CE Wulz, CE Mossolov, V Shumeiko, N Suarez Gonzalez, J Alderweireldt, S Bansal, S Cornelis, T De Wolf, EA Janssen, X Knutsson, A Lauwers, J Luyckx, S Ochesanu, S Rougny, R Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Van Spilbeeck, A Blekman, F Blyweert, S D'Hondt, J Daci, N Heracleous, N Keaveney, J Lowette, S Maes, M Olbrechts, A Python, Q Strom, D Tavernier, S Van Doninck, W Van Mulders, P Van Onsem, GP Villella, I Caillol, C Clerbaux, B De Lentdecker, G Dobur, D Favart, L Gay, APR Grebenyuk, A Léonard, A Mohammadi, A Perniè, L Perniè, L Randle-conde, A Reis, T Seva, T Thomas, L Van der Velde, C Vanlaer, P Wang, J Reid, ID |
Keywords: | CMS;Upsilon;B-Physics;Cross section |
Issue Date: | 2015 |
Publisher: | Elsevier |
Citation: | Physics Letters B, 749: 14 - 34, (2015) |
Abstract: | Differential cross sections as a function of transverse momentum p<inf>T</inf> are presented for the production of ϒ(nS) (n = 1, 2, 3) states decaying into a pair of muons. Data corresponding to an integrated luminosity of 4.9fb<sup>-1</sup> in pp collisions at s=7TeV were collected with the CMS detector at the LHC. The analysis selects events with dimuon rapidity |y|<1.2 and dimuon transverse momentum in the range 10<p<inf>T</inf><100GeV. The measurements show a transition from an exponential to a power-law behavior at p<inf>T</inf>≈20GeV for the three ϒ states. Above that transition, the ϒ(3S) spectrum is significantly harder than that of the ϒ(1S). The ratios of the ϒ(3S) and ϒ(2S) differential cross sections to the ϒ(1S) cross section show a rise as p<inf>T</inf> increases at low p<inf>T</inf>, then become flatter at higher p<inf>T</inf>. |
URI: | http://www.sciencedirect.com/science/article/pii/S037026931500547X http://bura.brunel.ac.uk/handle/2438/11278 |
DOI: | http://dx.doi.org/10.1016/j.physletb.2015.07.037 |
ISSN: | 0370-2693 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
|
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.