Measurements of the ϒ(1S), ϒ(2S), and ϒ(3S) differential cross sections in pp collisions at root √s = 7 TeV
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Published version
Author(s)
Type
Journal Article
Abstract
Differential cross sections as a function of transverse momentum pT 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 4.9View the MathML source in pp collisions at View the MathML source 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 View the MathML source. The measurements show a transition from an exponential to a power-law behavior at View the MathML source 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 pT increases at low pT, then become flatter at higher pT.
Date Issued
2015-07-22
Date Acceptance
2015-07-16
Citation
Physics Letters B, 2015, 749, pp.14-34
ISSN
0370-2693
Publisher
Elsevier
Start Page
14
End Page
34
Journal / Book Title
Physics Letters B
Volume
749
Copyright Statement
© 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access
article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Sponsor
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Grant Number
ST/J005665/1
ST/I005912/1
ST/J004901/1
ST/K003844/1 GRIDPP
ST/L00609X/1 GRIDPP
ST/K001604/1
ST/M005356/1
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
CMS
Upsilon
B-Physics
Cross section
OCTET QUARKONIA PRODUCTION
QED RADIATIVE-CORRECTIONS
UNIVERSAL MONTE-CARLO
PHOTOS
Nuclear & Particles Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Publication Status
Published
OA Location
http://www.sciencedirect.com/science/article/pii/S037026931500547X