Search for a new bottomonium state decaying to ϒ ( 1 S ) π + π − in pp collisions at √ s = 8 TeV
Name
1-s2.0-S0370269313008095-main.pdf
Description
Published version
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635.48 KB
Format
Adobe PDF
Checksum (MD5)
d7b986c3b8053166987aeb1447d7bff5
Date Issued
November 2013
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
CMS Collaboration, "Search for a new bottomonium state decaying to ϒ ( 1 S ) π + π − in pp collisions at √ s = 8 TeV." Physics Letters B 727 (2013): p. 57-76 doi 10.1016/J.PHYSLETB.2013.10.016 ©2013 Author(s)
Version
Final published version
Abstract
The results of a search for the bottomonium counterpart, denoted as X b , of the exotic charmonium state X(3872) is presented. The analysis is based on a sample of pp collisions at s=8 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 20.7 fb -1 . The search looks for the exclusive decay channel X b →Υ{hooked}(1S)π + π - followed by Υ{hooked}(1S)→μ + μ - . No evidence for an X b signal is observed. Upper limits are set at the 95% confidence level on the ratio of the inclusive production cross sections times the branching fractions to Υ{hooked}(1S)π + π - of the X b and the Υ{hooked}(2S). The upper limits on the ratio are in the range 0.9-5.4% for X b masses between 10 and 11 GeV. These are the first upper limits on the production of a possible X b at a hadron collider. © 2013 CERN.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2013.10.016
