Bose-Einstein correlations in pp, pPb, and PbPb collisions at √sNN = 0.9–7 TeV

The CMS Collaboration

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

Quantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 and 2.76 TeV, respectively, using the CMS detector at the Large Hadron Collider. Separate analyses are performed for same-sign unidentified charged particles as well as for same-sign pions and kaons identified via their energy loss in the silicon tracker. The characteristics of the one-, two-, and three-dimensional correlation functions are studied as functions of the pair average transverse momentum (kT) and the charged-particle multiplicity in the event. For all systems, the extracted correlation radii steadily increase with the event multiplicity, and decrease with increasing kT. The radii are in the range 1-5 fm, the largest values corresponding to very high multiplicity pPb interactions and to peripheral PbPb collisions with multiplicities similar to those seen in pPb data. It is also observed that the dependencies of the radii on multiplicity and kT largely factorize. At the same multiplicity, the radii are relatively independent of the colliding system and center-of-mass energy.
Original languageEnglish
Article number064912
Number of pages42
JournalPhysical Review C
Volume97
Issue number6
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • Correlation
  • Collisions
  • HBT radii

Cite this

@article{12c7599f6aa44259a87d61e6fcacb158,
title = "Bose-Einstein correlations in pp, pPb, and PbPb collisions at √sNN = 0.9–7 TeV",
abstract = "Quantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 and 2.76 TeV, respectively, using the CMS detector at the Large Hadron Collider. Separate analyses are performed for same-sign unidentified charged particles as well as for same-sign pions and kaons identified via their energy loss in the silicon tracker. The characteristics of the one-, two-, and three-dimensional correlation functions are studied as functions of the pair average transverse momentum (kT) and the charged-particle multiplicity in the event. For all systems, the extracted correlation radii steadily increase with the event multiplicity, and decrease with increasing kT. The radii are in the range 1-5 fm, the largest values corresponding to very high multiplicity pPb interactions and to peripheral PbPb collisions with multiplicities similar to those seen in pPb data. It is also observed that the dependencies of the radii on multiplicity and kT largely factorize. At the same multiplicity, the radii are relatively independent of the colliding system and center-of-mass energy.",
keywords = "Correlation, Collisions, HBT radii",
author = "Jordan Nash and {The CMS Collaboration}",
year = "2018",
doi = "10.1103/PhysRevC.97.064912",
language = "English",
volume = "97",
journal = "Physical Review C",
issn = "0556-2813",
publisher = "American Physical Society",
number = "6",

}

Bose-Einstein correlations in pp, pPb, and PbPb collisions at √sNN = 0.9–7 TeV. / The CMS Collaboration.

In: Physical Review C, Vol. 97, No. 6, 064912, 2018.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Bose-Einstein correlations in pp, pPb, and PbPb collisions at √sNN = 0.9–7 TeV

AU - Nash, Jordan

AU - The CMS Collaboration

PY - 2018

Y1 - 2018

N2 - Quantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 and 2.76 TeV, respectively, using the CMS detector at the Large Hadron Collider. Separate analyses are performed for same-sign unidentified charged particles as well as for same-sign pions and kaons identified via their energy loss in the silicon tracker. The characteristics of the one-, two-, and three-dimensional correlation functions are studied as functions of the pair average transverse momentum (kT) and the charged-particle multiplicity in the event. For all systems, the extracted correlation radii steadily increase with the event multiplicity, and decrease with increasing kT. The radii are in the range 1-5 fm, the largest values corresponding to very high multiplicity pPb interactions and to peripheral PbPb collisions with multiplicities similar to those seen in pPb data. It is also observed that the dependencies of the radii on multiplicity and kT largely factorize. At the same multiplicity, the radii are relatively independent of the colliding system and center-of-mass energy.

AB - Quantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 and 2.76 TeV, respectively, using the CMS detector at the Large Hadron Collider. Separate analyses are performed for same-sign unidentified charged particles as well as for same-sign pions and kaons identified via their energy loss in the silicon tracker. The characteristics of the one-, two-, and three-dimensional correlation functions are studied as functions of the pair average transverse momentum (kT) and the charged-particle multiplicity in the event. For all systems, the extracted correlation radii steadily increase with the event multiplicity, and decrease with increasing kT. The radii are in the range 1-5 fm, the largest values corresponding to very high multiplicity pPb interactions and to peripheral PbPb collisions with multiplicities similar to those seen in pPb data. It is also observed that the dependencies of the radii on multiplicity and kT largely factorize. At the same multiplicity, the radii are relatively independent of the colliding system and center-of-mass energy.

KW - Correlation

KW - Collisions

KW - HBT radii

U2 - 10.1103/PhysRevC.97.064912

DO - 10.1103/PhysRevC.97.064912

M3 - Article

VL - 97

JO - Physical Review C

JF - Physical Review C

SN - 0556-2813

IS - 6

M1 - 064912

ER -