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Measurement of the pseudorapidity and centrality dependence of the transverse energy density in Pb-Pb collisions at root s(NN)=2.76 TeV

Title	Measurement of the pseudorapidity and centrality dependence of the transverse energy density in Pb-Pb collisions at root s(NN)=2.76 TeV
Author	Chatrchyan, S., Işıldak, Bora
Publication Date:	2012-10-12
Publication Place	- American Physical Society
Subject	Nucleus-nucleus collisions, Color glass condensate, quark-gluon plasma, Au plus au, Pion-production, Collaboration, Model, Perspective, Particle
Type	Periodical
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	1079-7114
Record ID	484e54b4-57fc-4a15-bb76-e712c39572a1
Library Location	Natural and Mathematical Sciences
Date	2012-10-12
Notes	FMSR ; FNRS and FWO ; CNPq, CAPES, FAPERJ, and FAPESP ; MES ; CERN; CAS, MoST, and NSFC ; COLCIENCIAS ; MSES ; RPF ; MoER, SF0690030s09 and ERDF ; Academy of Finland, MEC, and HIP ; CEA and CNRS/IN2P3 ; BMBF, DFG, and HGF ; GSRT ; OTKA and NKTH ; DAE and DST ; IPM ; SFI ; INFN ; NRF and WCU ; LAS ; CINVESTAV, CONACYT, SEP, and UASLP-FAI ; MSI ; PAEC ; MSHE and NSC ; FCT ; JINR ; MON, RosAtom, RAS and RFBR ; MSTD
Sample Text	The transverse energy (E-T) in Pb-Pb collisions at 2.76 TeV nucleon-nucleon center-of-mass energy (root s(NN)) has been measured over a broad range of pseudorapidity (eta) and collision centrality by using the CMS detector at the LHC. The transverse energy density per unit pseudorapidity (dE(T)/d eta) increases faster with collision energy than the charged particle multiplicity. This implies that the mean energy per particle is increasing with collision energy. At all pseudorapidities, the transverse energy per participating nucleon increases with the centrality of the collision. The ratio of transverse energy per unit pseudorapidity in peripheral to central collisions varies significantly as the pseudorapidity increases from eta = 0 to vertical bar eta vertical bar = 5.0. For the 5% most central collisions, the energy density per unit volume is estimated to be about 14 GeV/fm(3) at a time of 1 fm/c after the collision. This is about 100 times larger than normal nuclear matter density and a factor of 2.6 times higher than the energy density reported at root s(NN) = 200 GeV at the Relativistic Heavy Ion Collider.
DOI	10.1103/PhysRevLett.109.152303
Cilt	109

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Measurement of the pseudorapidity and centrality dependence of the transverse energy density in Pb-Pb collisions at root s(NN)=2.76 TeV

Author Chatrchyan, S., Işıldak, Bora

Publication Date 2012-10-12

Publication Place - American Physical Society

Subject Nucleus-nucleus collisions, Color glass condensate, quark-gluon plasma, Au plus au, Pion-production, Collaboration, Model, Perspective, Particle

Type Periodical

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 1079-7114

Record ID 484e54b4-57fc-4a15-bb76-e712c39572a1

Library Location Natural and Mathematical Sciences

Date 2012-10-12

Notes FMSR ; FNRS and FWO ; CNPq, CAPES, FAPERJ, and FAPESP ; MES ; CERN; CAS, MoST, and NSFC ; COLCIENCIAS ; MSES ; RPF ; MoER, SF0690030s09 and ERDF ; Academy of Finland, MEC, and HIP ; CEA and CNRS/IN2P3 ; BMBF, DFG, and HGF ; GSRT ; OTKA and NKTH ; DAE and DST ; IPM ; SFI ; INFN ; NRF and WCU ; LAS ; CINVESTAV, CONACYT, SEP, and UASLP-FAI ; MSI ; PAEC ; MSHE and NSC ; FCT ; JINR ; MON, RosAtom, RAS and RFBR ; MSTD

Sample Text The transverse energy (E-T) in Pb-Pb collisions at 2.76 TeV nucleon-nucleon center-of-mass energy (root s(NN)) has been measured over a broad range of pseudorapidity (eta) and collision centrality by using the CMS detector at the LHC. The transverse energy density per unit pseudorapidity (dE(T)/d eta) increases faster with collision energy than the charged particle multiplicity. This implies that the mean energy per particle is increasing with collision energy. At all pseudorapidities, the transverse energy per participating nucleon increases with the centrality of the collision. The ratio of transverse energy per unit pseudorapidity in peripheral to central collisions varies significantly as the pseudorapidity increases from eta = 0 to vertical bar eta vertical bar = 5.0. For the 5% most central collisions, the energy density per unit volume is estimated to be about 14 GeV/fm(3) at a time of 1 fm/c after the collision. This is about 100 times larger than normal nuclear matter density and a factor of 2.6 times higher than the energy density reported at root s(NN) = 200 GeV at the Relativistic Heavy Ion Collider.

DOI 10.1103/PhysRevLett.109.152303

Cilt 109