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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Fontoura, C. E. [1] ; Krein, G. [2] ; Valcarce, A. [3, 4] ; Vijande, J. [5, 6]
Total Authors: 4
Affiliation:
[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
Total Affiliations: 6
Document type: Journal article
Source: Physical Review D; v. 99, n. 9 MAY 28 2019.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 13/01907-0 - São Paulo Research and Analysis Center
Grantee:Sergio Ferraz Novaes
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/50269-7 - Search for heavy flavor exotics
Grantee:Gastão Inácio Krein
Support type: Regular Research Grants