Interaction of exotic states in a hadronic medium: the Zc (3900) case

被引：1

作者：

Abreu, L. M. ^{[1
,2
]}

Magalhaes, R. O. ^{[1
]}

Navarra, F. S. ^{[3
]}

Vieira, H. P. L. ^{[1
]}

机构：

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

[2] Univ Sao Paulo, Inst Fis, Sao Paulo, SP, Brazil

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

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2024年 / 51卷 / 09期

基金：

巴西圣保罗研究基金会;

关键词：

exotic hadron states; heavy-ion collisions; hadron physics; Z(C)(3900); J/PSI; PENTAQUARK; COLLISIONS; X(3872);

D O I：

10.1088/1361-6471/ad66ec

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We investigate the interactions of the charged exotic state Z(c)(3900) in a hadronic medium composed of light mesons. We study processes such as Z(c)pi -> DD<overline>, Z(c)pi ->(DD)-D-& lowast;<overline>(& lowast;), Z(c)pi -> DD<overline>(& lowast;) and the inverse ones. Using effective Lagrangians and form factors calculated with Quantum Chromodynamics (QCD) sum rules (treating the Z(c)(3900) as a tetraquark) we estimate the vacuum and thermally-averaged cross-sections of these reactions. We find that the Z(c)(3900) has relatively large interaction cross sections with the constituent particles of the hadronic medium. After that, we use the production and suppression cross sections in a rate equation to estimate the time evolution of the Z(c) multiplicity. We include the Z(c) decay and regeneration terms The coalescence model is employed to compute the initial Z(c) multiplicity for the compact tetraquark configuration. Our results indicate that the combined effects of hadronic interactions, hydrodynamical expansion, decay and regeneration affect the final yield, which is bigger than the initial value. Besides, the dependence of the Z(c) final yield with the centrality, center-of-mass energy and the charged hadron multiplicity measured at midrapidity [dN(ch)/d eta(eta<0.5)] is also investigated.

引用

页数：19

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