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Measurement of long-range near-side two-particle angular correlations in pp collisions at √s=13  TeV

Measurement of long-range near-side two-particle angular correlations in pp collisions at √s=13  TeV
Measurement of long-range near-side two-particle angular correlations in pp collisions at √s=13  TeV
Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of-mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an integrated luminosity of about 270  nb−1. The correlations are studied over a broad range of pseudorapidity (|η|<2.4) and over the full azimuth (ϕ) as a function of charged particle multiplicity and transverse momentum (pT). In high-multiplicity events, a long-range (|Δη|>2.0), near-side (Δϕ≈0) structure emerges in the two-particle Δη–Δϕ correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0<pT<2.0  GeV/c and an approximately linear increase with the charged particle multiplicity, with an overall correlation strength similar to that found in earlier pp data at √s=7  TeV. The present measurement extends the study of near-side long-range correlations up to charged particle multiplicities Nch∼180, a region so far unexplored in pp collisions. The observed long-range correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.
1079-7114
1-19
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2016) Measurement of long-range near-side two-particle angular correlations in pp collisions at √s=13  TeV. Physical Review Letters, 116 (17), 1-19, [172302]. (doi:10.1103/PhysRevLett.116.172302).

Record type: Article

Abstract

Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of-mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an integrated luminosity of about 270  nb−1. The correlations are studied over a broad range of pseudorapidity (|η|<2.4) and over the full azimuth (ϕ) as a function of charged particle multiplicity and transverse momentum (pT). In high-multiplicity events, a long-range (|Δη|>2.0), near-side (Δϕ≈0) structure emerges in the two-particle Δη–Δϕ correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0<pT<2.0  GeV/c and an approximately linear increase with the charged particle multiplicity, with an overall correlation strength similar to that found in earlier pp data at √s=7  TeV. The present measurement extends the study of near-side long-range correlations up to charged particle multiplicities Nch∼180, a region so far unexplored in pp collisions. The observed long-range correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.

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Accepted/In Press date: 11 October 2015
e-pub ahead of print date: 27 April 2016
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 408257
URI: http://eprints.soton.ac.uk/id/eprint/408257
ISSN: 1079-7114
PURE UUID: 39e14901-1c89-46a5-a1db-ca39eb2b1e2d
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 18 May 2017 04:02
Last modified: 26 Nov 2021 02:52

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Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration

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