Carnegie Mellon University
Browse

Upsilon production cross section in pp collisions at s√=7  TeV

Download (1.19 MB)
journal contribution
posted on 2011-06-01, 00:00 authored by B. Akgun, R. Carroll, Thomas A. Ferguson, Y. Iiyama, D. W. Jang, S. Y. Jun, Y. F. Liu, Manfred PauliniManfred Paulini, James RussJames Russ, N. Terentyev, Helmut Vogel, Igor VorobievIgor Vorobiev, CMS Collaboration

The Υ(1S), Υ(2S), and Υ(3S) production cross sections in proton-proton collisions at s√=7  TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1±0.3  pb−1. Integrated over the rapidity range |y|<2, we find the product of the Υ(1S) production cross section and branching fraction to dimuons to be σ(pp→Υ(1S)X)⋅B(Υ(1S)→μ+μ−)=7.37±0.13+0.61−0.42±0.81  nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Υ(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections as a function of transverse momentum and rapidity.

History

Publisher Statement

© 2011 CERN, for the CMS Collaboration

Date

2011-06-01

Usage metrics

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC