Date of Original Version




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© 2015 CERN for the benefit of the CMS Collaboration.

Abstract or Description

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 4.9 in pp collisions at 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 . The measurements show a transition from an exponential to a power-law behavior at 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 lowpT, then become flatter at higher pT.



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Published In

Physics Letters B, 749, 14-34.