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Indication of transverse radial flow in high-multiplicity proton-proton collisions at the Large Hadron Collider

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Title Indication of transverse radial flow in high-multiplicity proton-proton collisions at the Large Hadron Collider
 
Creator GHOSH, P
MUHURI, S
NAYAK, JK
VARMA, R
 
Subject transverse radial flow
proton-proton collisions
Large Hadron Collider
QUARK-GLUON-PLASMA
HEAVY-ION COLLISIONS
SUPERDENSE MATTER
ENERGY
COLLABORATION
PERSPECTIVE
EVENTS
SEARCH
PHASE
 
Description We analyze the measured spectra of pi(+/-), K-+/-, p((p) over bar) in proton-proton (pp) collisions at root s = 0.9, 2.76 and 7 TeV in the light of blast-wave model to extract the transverse radial flow velocity and kinetic temperature at freeze-out for the system formed in pp collisions. The dependence of the blast-wave parameters on average charged particle multiplicity of event sample or the 'centrality' of collisions has been studied and compared with results of similar analysis in nucleus-nucleus (AA) and proton-nucleus (pA) collisions. We analyze the spectra of K-s(0), Lambda((Lambda) over bar) and Xi(-) also to see the dependence of blast-wave description on the species of produced particles. Within the framework of the blast-wave model, the study reveals indication of collective behavior for high-multiplicity events in pp collisions at LHC. Strong transverse radial flow in high-multiplicity pp collisions and its comparison with that in pA and AA collisions match with predictions from a very recent theoretical work (Shuryak and Zahed 2013 arXiv:hep-ph/1301.4470) that addresses the conditions for applicability of hydrodynamics in pp and pA collisions.
 
Publisher IOP PUBLISHING LTD
 
Date 2014-12-28T11:29:55Z
2014-12-28T11:29:55Z
2014
 
Type Article
 
Identifier JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 41(3)
0954-3899
1361-6471
http://dx.doi.org/10.1088/0954-3899/41/3/035106
http://dspace.library.iitb.ac.in/jspui/handle/100/16362
 
Language English