Upsilon suppression in a hadron gas

Autor(es)

Abreu, L. M. ; Navarra, F. S. ; Nielsen, M.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW C; v. 101, n. 1, p. 12-pg., 2020-01-09.

Resumo

In this work, we study the interactions of bottom mesons which lead to Upsilon production and absorption in hot hadronic matter. We use effective Lagrangians to calculate the Upsilon production cross section in processes such as (B) over bar(*) B (*) -> Upsilon + (pi, rho) and also the Upsilon absorption cross section in the corresponding inverse processes. We update and extend previous calculations by Lin and Ko, introducing anomalous interactions. The obtained cross sections are used as input to solve the rate equation which allows us to follow the time evolution of the Upsilon multiplicity. In contrast to previous conjectures, our results suggest that the interactions in the hadron gas phase reduce the Upsilon abundance. (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