Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at root s(NN)=5.02 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
22/10/2015
22/10/2015
29/05/2015
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Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Transverse momentum spectra of charged particles are measured by the CMS experiment at the CERN LHC in pPb collisions at root s(NN) = 5.02 TeV, in the range 0.4 < pT < 120 GeV/c and pseudorapidity |eta(CM)| < 1.8 in the proton-nucleon center-of-mass frame. For p(T) < 10 GeV/c, the charged-particle production is asymmetric about eta(CM) = 0, with smaller yield observed in the direction of the proton beam, qualitatively consistent with expectations from shadowing in nuclear parton distribution functions (nPDF). A pp reference spectrum at root s = 5.02 TeV is obtained by interpolation from previous measurements at higher and lower center-of-mass energies. The p(T) distribution measured in pPb collisions shows an enhancement of charged particles with p(T) > 20 GeV/c compared to expectations from the pp reference. The enhancement is larger than predicted by perturbative quantum chromodynamics calculations that include antishadowing modifications of nPDFs. |
Formato |
1-25 |
Identificador |
http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-015-3435-4 European Physical Journal C. New York: Springer, v. 75, n. 237, p. 1-25, 2015. 1434-6044 http://hdl.handle.net/11449/129591 http://dx.doi.org/10.1140/epjc/s10052-015-3435-4 WOS:000355681400005 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
European Physical Journal C |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |