$nS)$ polarizations versus particle multiplicity in pp collisions at $s =$ 7 TeV
$nS)$ polarizations versus particle multiplicity in pp collisions at $s =$ 7 TeV
The polarizations of the ϒ(1S)ϒ(1S), ϒ(2S)ϒ(2S), and ϒ(3S)ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at View the MathML sources=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS)ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|<1.2|y|<1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S)ϒ(2S) and ϒ(3S)ϒ(3S) cases.
31-52
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
(2016)
$nS)$ polarizations versus particle multiplicity in pp collisions at $s =$ 7 TeV.
Physics Letters B, B761, .
(doi:10.1016/j.physletb.2016.07.065).
Abstract
The polarizations of the ϒ(1S)ϒ(1S), ϒ(2S)ϒ(2S), and ϒ(3S)ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at View the MathML sources=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS)ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|<1.2|y|<1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S)ϒ(2S) and ϒ(3S)ϒ(3S) cases.
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Accepted/In Press date: 26 July 2016
e-pub ahead of print date: 2 August 2016
Organisations:
Physics & Astronomy
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Local EPrints ID: 408265
URI: http://eprints.soton.ac.uk/id/eprint/408265
ISSN: 0370-2693
PURE UUID: 4574cdd8-bd1f-4c31-be99-2d9e30bc0795
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Date deposited: 18 May 2017 04:02
Last modified: 16 Mar 2024 03:54
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Author:
Vardan Khachatryan
Corporate Author: The CMS Collaboration
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