Z(b)(10610) in a hadronic medium

Autor(es)

Abreu, L. M. ^[1] ; Navarra, F. S. ^{[2, 3]} ; Nielsen, M. ^{[2, 4]} ; Vasconcellos, A. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Bahia, Inst Fis, Campus Ondina, BR-40170115 Salvador, BA - Brazil

^[2] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil

^[3] Univ Paris Saclay, CNRS, CEA, Inst Phys Theor, F-91191 Gif Sur Yvette - France

^[4] Stanford Univ, SLAC Nacl Acelerator Lab, Stanford, CA 94309 - USA

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL C; v. 78, n. 9 SEP 19 2018.
• Citações Web of Science: 1

Resumo

In this work we investigate the Z(b)(10610) (called simply Z(b)) abundance in the hot hadron gas produced in heavy ion collisions after the quark-gluon plasma phase. We use effective Lagrangians to calculate the thermally averaged cross sections of Z(b) production in processes such as B-({*}()) + (B) over bar ((){*}()) -> pi + Z(b)(10610) and also of its absorption in the corresponding inverse processes. We then solve the rate equation to follow the time evolution of the Z(b) multiplicity. We find that, if we neglect the Z(b) decay, the number of Z(b)'s produced at the end of the quark-gluon plasma phase remains almost constant during the hadron phase. The introduction of the decay in the rate equation leads to a suppression in the final yield by a factor two. (AU)

• Processo FAPESP: 17/07278-5 - Estudo de estados exóticos à partir de uma Hadrodinâmica efetiva numa álgebra superconforme
• Beneficiário: Marina Nielsen
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 12/50984-4 - Física de hádrons
• Beneficiário: Fernando Silveira Navarra
• Modalidade de apoio: Auxílio à Pesquisa - Temático