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Title: Onset of radial flow in p + p collisions

Abstract

It has been debated for decades whether hadrons emerging from p+p collisions exhibit collective expansion. The signal of the collective motion in p+p collisions is not as clear as in heavy-ion collisions because of the low multiplicity and large fluctuation in p+p collisions. Tsallis Blast-Wave (TBW) model is a thermodynamic approach, introduced to handle the overwhelming correlation and fluctuation in the hadronic processes. We have systematically studied the identified particle spectra in p+p collisions from RHIC to LHC using TBW and found no appreciable radial flow in p+p collisions below √s = 900 GeV. At LHC higher energy of 7 TeV in p+p collisions, the radial flow velocity achieves an average of (β) = 0.320 ± 0.005. This flow velocity is comparable to that in peripheral (40-60%) Au+Au collisions at RHIC. In addition, breaking of the identified particle spectra m T scaling was also observed at LHC from a model independent test.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [2]
  1. Univ. of Science and Technology of China, Hefei (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1188210
Alternate Identifier(s):
OSTI ID: 1181629
Report Number(s):
BNL-107636-2015-JA
Journal ID: ISSN 0556-2813; PRVCAN
Grant/Contract Number:  
SC00112704; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; relativistic heavy ion collider

Citation Formats

Jiang, Kun, Zhu, Yinying, Liu, Weitao, Chen, Hongfang, Li, Cheng, Ruan, Lijuan, Tang, Zebo, and Xu, Zhangbu. Onset of radial flow in p+p collisions. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.91.024910.
Jiang, Kun, Zhu, Yinying, Liu, Weitao, Chen, Hongfang, Li, Cheng, Ruan, Lijuan, Tang, Zebo, & Xu, Zhangbu. Onset of radial flow in p+p collisions. United States. doi:10.1103/PhysRevC.91.024910.
Jiang, Kun, Zhu, Yinying, Liu, Weitao, Chen, Hongfang, Li, Cheng, Ruan, Lijuan, Tang, Zebo, and Xu, Zhangbu. Mon . "Onset of radial flow in p+p collisions". United States. doi:10.1103/PhysRevC.91.024910. https://www.osti.gov/servlets/purl/1188210.
@article{osti_1188210,
title = {Onset of radial flow in p+p collisions},
author = {Jiang, Kun and Zhu, Yinying and Liu, Weitao and Chen, Hongfang and Li, Cheng and Ruan, Lijuan and Tang, Zebo and Xu, Zhangbu},
abstractNote = {It has been debated for decades whether hadrons emerging from p+p collisions exhibit collective expansion. The signal of the collective motion in p+p collisions is not as clear as in heavy-ion collisions because of the low multiplicity and large fluctuation in p+p collisions. Tsallis Blast-Wave (TBW) model is a thermodynamic approach, introduced to handle the overwhelming correlation and fluctuation in the hadronic processes. We have systematically studied the identified particle spectra in p+p collisions from RHIC to LHC using TBW and found no appreciable radial flow in p+p collisions below √s = 900 GeV. At LHC higher energy of 7 TeV in p+p collisions, the radial flow velocity achieves an average of (β) = 0.320 ± 0.005. This flow velocity is comparable to that in peripheral (40-60%) Au+Au collisions at RHIC. In addition, breaking of the identified particle spectra mT scaling was also observed at LHC from a model independent test.},
doi = {10.1103/PhysRevC.91.024910},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 91,
place = {United States},
year = {2015},
month = {2}
}

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