Particle multiplicities in the central region of high-energy collisions from k(T)-factorization with running coupling corrections

Autor(es)

Dumitru, Adrian ^{[1, 2, 3, 4]} ; Giannini, Andre V. ^[5] ; Luzum, Matthew ^[5] ; Nara, Yasushi ^[6]

Afiliação do(s) autor(es)

^[1] Brookhaven Natl Lab, Phys Dept, Upton, NY 11973 - USA

^[2] CUNY, Dept Nat Sci, Baruch Coll, 17 Lexington Ave, New York, NY 10010 - USA

^[3] CUNY, Grad Sch, 365 Fifth Ave, New York, NY 10016 - USA

^[4] CUNY, Univ Ctr, 365 Fifth Ave, New York, NY 10016 - USA

^[5] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil

^[6] Akita Int Univ, Akita 0101292 - Japan

• Tipo de documento: Artigo Científico
• Fonte: Physics Letters B; v. 784, p. 417-422, SEP 10 2018.
• Citações Web of Science: 3

Resumo

Horowitz and Kovchegov have derived a k(T)-factorization formula for particle production at small x which includes running coupling corrections. We perform a first numerical analysis to confront the theory with data on the energy and centrality dependence of particle multiplicities at midrapidity in high-energy p+A (and A+A) collisions. Moreover, we point out a strikingly different dependence of the multiplicity per participant on N-part in p+Pb vs. Pb+Pb collisions at LHC energies, and argue that the observed behavior follows rather naturally from the convolution of the gluon distributions of an asymmetric vs. symmetric projectile and target. (c) 2018 The Authors. Published by Elsevier B.V. (AU)

• Processo FAPESP: 17/05685-2 - Física hadrônica em colisões nucleares de altas energias
• Beneficiário: Jun Takahashi
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 16/24029-6 - A investigação da força nuclear forte sob condições extremas
• Beneficiário: Matthew William Luzum
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/14974-8 - Fenomenologia das colisões de íons pesados relativísticos: QCD em condições extremas
• Beneficiário: André Veiga Giannini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado