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Title: Measurement of long-range near-side two-particle angular correlations in pp collisions at $$\sqrt{s}$$ = 13 TeV

Our 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 (p T). In high-multiplicity events, a long-range (|Δη| > 2.0), near-side (ΔΦ≈ 0) structure emerges in the two-particle Dh–Df correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0 < p T < 2.0 GeV/c and an approximately linear increase with the charged particle multiplicity. The overall correlation strength at √s = 13 TeV is similar to that found in earlier pp data at √s = 7 TeV, but is measured up to much higher multiplicity values. We observed long-range correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.
Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-15-466-CMS
Journal ID: ISSN 0031-9007; arXiv eprint number arXiv:1510.03068
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 17; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1249949
Alternate Identifier(s):
OSTI ID: 1226338

Khachatryan, Vardan. Measurement of long-range near-side two-particle angular correlations in pp collisions at $\sqrt{s}$ = 13 TeV. United States: N. p., Web. doi:10.1103/PhysRevLett.116.172302.
Khachatryan, Vardan. Measurement of long-range near-side two-particle angular correlations in pp collisions at $\sqrt{s}$ = 13 TeV. United States. doi:10.1103/PhysRevLett.116.172302.
Khachatryan, Vardan. 2016. "Measurement of long-range near-side two-particle angular correlations in pp collisions at $\sqrt{s}$ = 13 TeV". United States. doi:10.1103/PhysRevLett.116.172302.
@article{osti_1249949,
title = {Measurement of long-range near-side two-particle angular correlations in pp collisions at $\sqrt{s}$ = 13 TeV},
author = {Khachatryan, Vardan},
abstractNote = {Our 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 Dh–Df 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. The overall correlation strength at √s = 13 TeV is similar to that found in earlier pp data at √s = 7 TeV, but is measured up to much higher multiplicity values. We observed long-range correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.},
doi = {10.1103/PhysRevLett.116.172302},
journal = {Physical Review Letters},
number = 17,
volume = 116,
place = {United States},
year = {2016},
month = {4}
}