X(3872) Production in Relativistic Heavy-Ion Collisions

Abstract

Heavy-ion collisions provide a unique opportunity to study the nature of X(3872) compared with electron-positron and proton-proton (antiproton) collisions. We investigate the centrality and momentum dependence of X(3872) in heavy-ion collisions via the Langevin equation and instant coalescence model (LICM). When X(3872) is treated as a compact tetraquark state, the tetraquarks are produced via the coalescence of heavy and light quarks near the quantum chromodynamic (QCD) phase transition due to the restoration of the heavy quark potential at $T\to T_c$. In the molecular scenario, loosely bound X(3872) is produced via the coalescence of $D^0$-${\bar{D}}^{\ast 0}$ mesons in a hadronic medium after kinetic freeze-out. We employ the LICM to explain both $D^0$ and $J/\psi$ production as a benchmark. Then we give predictions regarding X(3872) production and the nuclear modification factor $R_{AA}^{X(3872)}$. We find that the total yield of tetraquark is several times larger than the molecular production in Pb-Pb collisions. Although the geometric size of the molecule is huge, the coalescence probability is small due to strict constraints on the relative momentum between $D^0$ and ${\bar{D}}^{\ast 0}$ in the molecular Wigner function, which significantly suppresses the molecular yield.

11 pages, 9 figures

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Cited by in corpus (20)

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• The Present and Future of QCD
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• Production of exotic hadrons in $pp$ and nuclear collisions
• Bottom energy loss and non-prompt $J/\psi$ production in relativistic heavy ion collisions
• Theoretical investigation of the molecular nature of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ and the possibility of observing the $D\bar{D}K$ bound state $K_{c\bar{c}}(4180)$ in inclusive $e^{+}{e}^{-}\to c\bar{c}$ collisions
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• Machine learning approach to analyze heavy quark diffusion coefficient in relativistic heavy-ion collisions
• A potential approach to the $X(3872)$ thermal behavior
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• Non-thermal distributions of charm and charmonium in relativistic heavy-ion collisions
• Coalescence production of sexaquark with three diquarks in high-energy nuclear collisions
• Soft-hard factorization of heavy-quark transport in QCD matter at finite chemical potential
• The charmonium-like exotic hadron productions in $e^{+}{e}^{-}$ collisions at the BESIII energy with the PACIAE model
• Evolution of charm-meson ratios in an expanding hadron gas
• Anisotropic flows of charmonium in the relativistic heavy-ion collisions
• Exploring parameter dependence of heavy-flavor dynamics in small collision systems
• Investigation of $T_{cs0}^{\ast }(2870{)}^0$ in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the PACIAE model