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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Production of exotic tetraquarks QQ(q)over-bar (q)over-bar in heavy-ion collisions at the LHC

Texto completo
Autor(es):
Fontoura, C. E. [1] ; Krein, G. [2] ; Valcarce, A. [3, 4] ; Vijande, J. [5, 6]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] DCTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz, 271 Bloco 2, BR-01140070 Sao Paulo, SP - Brazil
[3] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca - Spain
[4] Univ Salamanca, IUFFyM, E-37008 Salamanca - Spain
[5] Univ Valencia, Inst Invest Sanitaria La Fe, Unidad Mixta Invest Radiofis & Instrumentac Nucl, E-46100 Valencia - Spain
[6] UV, CSIC, IFIC, Valencia 46100 - Spain
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 99, n. 9 MAY 28 2019.
Citações Web of Science: 0
Resumo

We investigate the production of exotic tetraquarks, QQ (q) over bar (q) over bar T-QQ (Q = c or b and q = u or d), in relativistic heavy-ion collisions using the quark coalescence model. The T-QQ yield is given by the overlap of the density matrix of the constituents in the emission source with the Wigner function of the produced tetraquark. The tetraquark wave function is obtained from exact solutions of the four-body problem using realistic constituent models. The production yields are typically one order of magnitude smaller than previous estimations based on simplified wave functions for the tetraquarks. We also evaluate the consequences of the partial restoration of chiral symmetry at the hadronization temperature on the coalescence probability. Such effects, in addition to increasing the stability of the tetraquarks, lead to an enhancement of the production yields, pointing towards an excellent discovery potential in forthcoming experiments. We discuss further consequences of our findings for the search of exotic tetraquarks in central Pb + Pb collisions at the LHC. (AU)

Processo FAPESP: 13/01907-0 - Centro de Pesquisa e Análise de São Paulo
Beneficiário:Sergio Ferraz Novaes
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 17/50269-7 - Search for heavy flavor exotics
Beneficiário:Gastão Inácio Krein
Linha de fomento: Auxílio à Pesquisa - Regular