Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at root s(NN)=5.02 TeV

WOS: 000355681400005 ; 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. ; Austrian Federal Ministry of Science, Research and Economy; Austrian Science FundAustrian Science Fund (FWF); Belgian Fonds de la Recherche ScientifiqueFonds de la Recherche Scientifique - FNRS; Fonds voor Wetenschappelijk OnderzoekFWO; CNPqNational Council for Scientific and Technological Development (CNPq); CAPESCAPES; FAPERJCarlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ); FAPESPFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Bulgarian Ministry of Education and Science; CERN; Chinese Academy of SciencesChinese Academy of Sciences; Ministry of Science and Technology; National Natural Science Foundation of ChinaNational Natural Science Foundation of China; Colombian Funding Agency (COLCIENCIAS)Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Croatian Ministry of Science, Education and SportMinistry of Science, Education and Sports, Republic of Croatia; Croatian Science Foundation; Research Promotion Foundation, Cyprus; Ministry of Education ...