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Title: Intrinsic fluctuations of the proton saturation momentum scale in high multiplicity p+p collisions

Journal Article · · Nuclear Physics. A
 [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); China Central Normal Univ., Wuhan (China). Physics Dept.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)

High multiplicity events in p+p collisions are studied using the theory of the Color Glass Condensate. Here, we show that intrinsic fluctuations of the proton saturation momentum scale are needed in addition to the sub-nucleonic color charge fluctuations to explain the very high multiplicity tail of distributions in p+p collisions. It is presumed that the origin of such intrinsic fluctuations is non-perturbative in nature. Classical Yang Mills simulations using the IP-Glasma model are performed to make quantitative estimations. Furthermore, we find that fluctuations as large as O(1) of the average values of the saturation momentum scale can lead to rare high multiplicity events seen in p+p data at RHIC and LHC energies. Using the available data on multiplicity distributions we try to constrain the distribution of the proton saturation momentum scale and make predictions for the multiplicity distribution in 13 TeV p+p collisions.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC00112704; SC0012704
OSTI ID:
1295197
Alternate ID(s):
OSTI ID: 1359694
Report Number(s):
BNL-112122-2016-JA; R&D Project: KB0301020; KB0301020
Journal Information:
Nuclear Physics. A, Vol. 945, Issue C; ISSN 0375-9474
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (6)

Charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at $$\sqrt{s}=$$ s = 0.9, 7, and 8 TeV journal December 2017
Collectivity in Small Collision Systems: An Initial-State Perspective journal January 2016
Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions journal October 2016
Charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at $\sqrt{s}=$ 0.9, 7, and 8 TeV text January 2017
Revealing proton shape fluctuations with incoherent diffraction at high energy text January 2016
Mass ordering of spectra from fragmentation of saturated gluon states in high multiplicity proton-proton collisions text January 2016