Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/101868
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Type: | Journal article |
Title: | Measurement of upsilon production in 7 TeV pp collisions at ATLAS |
Author: | The ATLAS Collaboration, Aad, G. |
Citation: | Physical Review D, 2013; 87(5):052004-1-052004-31 |
Publisher: | American Physical Society |
Issue Date: | 2013 |
ISSN: | 2470-0010 2470-0029 |
Statement of Responsibility: | G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni … M.J. White … et al. [The ATLAS Collaboration] |
Abstract: | Using 1.8 fb-1 of pp collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of Υ(1S,2S,3S) mesons. Υ mesons are reconstructed using the dimuon decay mode. Total production cross sections for pT<70 GeV and in the rapidity interval |yΥ|<2.25 are measured to be, 8.01±0.02±0.36±0.31 nb, 2.05±0.01±0.12±0.08 nb, and 0.92±0.01±0. 07±0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times dimuon branching fractions for Υ(1S), Υ(2S), and Υ(3S) as a function of Υ transverse momentum pT and rapidity are presented. These cross sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame, the cross section may vary by approximately ±20%. If a nontrivial azimuthal dependence is considered, integrated cross sections may be significantly enhanced by a factor of 2 or more. We compare our results to several theoretical models of Υ meson production, finding that none provide an accurate description of our data over the full range of Υ transverse momenta accessible with this data set. |
Rights: | © 2013 CERN, for the ATLAS Collaboration Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
DOI: | 10.1103/PhysRevD.87.052004 |
Published version: | http://dx.doi.org/10.1103/physrevd.87.052004 |
Appears in Collections: | Aurora harvest 7 Chemistry and Physics publications |
Files in This Item:
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hdl_101868.pdf | Published version | 1.99 MB | Adobe PDF | View/Open |
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