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# $nS)$ polarizations versus particle multiplicity in pp collisions at $s =$ 7 TeV

The CMS Collaboration (2016) $nS)$ polarizations versus particle multiplicity in pp collisions at $s =$ 7 TeV. Physics Letters B, B761, 31-52.

Record type: Article

## 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.

Text
bS0370269316304063-main - Version of Record

Accepted/In Press date: 26 July 2016
e-pub ahead of print date: 2 August 2016
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 408265
URI: http://eprints.soton.ac.uk/id/eprint/408265
ISSN: 0370-2693
PURE UUID: 4574cdd8-bd1f-4c31-be99-2d9e30bc0795
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 18 May 2017 04:02

## Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration