Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions
Abstract
The mass ordering of mean transverse momentum $$\langle$$pT$$\rangle$$ and of the Fourier harmonic coefficient v2 (pT) of azimuthally anisotropic particle distributions in high energy hadron collisions is often interpreted as evidence for the hydrodynamic flow of the matter produced. We investigate an alternative initial state interpretation of this pattern in high-multiplicity proton-proton collisions at the LHC. The QCD Yang-Mills equations describing the dynamics of saturated gluons are solved numerically with initial conditions obtained from the color-glass-condensate-based impact-parameter-dependent glasma model. The gluons are subsequently fragmented into various hadron species employing the well established Lund string fragmentation algorithm of the pythia event generator. Lastly, we find that this initial state approach reproduces characteristic features of bulk spectra, in particular, the particle mass dependence of $$\langle$$pT$$\rangle$$ and v2 (pT).
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics; Heidelberg Univ. (Germany). Inst. for Theoretische Physik
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1351716
- Alternate Identifier(s):
- OSTI ID: 1328960
- Report Number(s):
- BNL-113686-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: KB0301020; KB0301020; TRN: US1701518
- Grant/Contract Number:
- SC0012704; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 117; Journal Issue: 16; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Schenke, Björn, Schlichting, Sören, Tribedy, Prithwish, and Venugopalan, Raju. Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.117.162301.
Schenke, Björn, Schlichting, Sören, Tribedy, Prithwish, & Venugopalan, Raju. Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions. United States. https://doi.org/10.1103/PhysRevLett.117.162301
Schenke, Björn, Schlichting, Sören, Tribedy, Prithwish, and Venugopalan, Raju. Fri .
"Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions". United States. https://doi.org/10.1103/PhysRevLett.117.162301. https://www.osti.gov/servlets/purl/1351716.
@article{osti_1351716,
title = {Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions},
author = {Schenke, Björn and Schlichting, Sören and Tribedy, Prithwish and Venugopalan, Raju},
abstractNote = {The mass ordering of mean transverse momentum $\langle$pT$\rangle$ and of the Fourier harmonic coefficient v2 (pT) of azimuthally anisotropic particle distributions in high energy hadron collisions is often interpreted as evidence for the hydrodynamic flow of the matter produced. We investigate an alternative initial state interpretation of this pattern in high-multiplicity proton-proton collisions at the LHC. The QCD Yang-Mills equations describing the dynamics of saturated gluons are solved numerically with initial conditions obtained from the color-glass-condensate-based impact-parameter-dependent glasma model. The gluons are subsequently fragmented into various hadron species employing the well established Lund string fragmentation algorithm of the pythia event generator. Lastly, we find that this initial state approach reproduces characteristic features of bulk spectra, in particular, the particle mass dependence of $\langle$pT$\rangle$ and v2 (pT).},
doi = {10.1103/PhysRevLett.117.162301},
journal = {Physical Review Letters},
number = 16,
volume = 117,
place = {United States},
year = {Fri Oct 14 00:00:00 EDT 2016},
month = {Fri Oct 14 00:00:00 EDT 2016}
}
Web of Science
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