$Z_c(3900)$ in a hadronic molecule and a triangle singularity approach at finite temperature

Abstract

Studying exotic hadrons is a challenge against the conventional quark model, providing us with a good platform to deepen our understanding of the strong interaction. An inclusive study of the exotic hadrons in vacuum and at finite temperature is an intriguing approach to shed light on their nature. As a first step, we study the $Z_c(3900)$ in both the $D{\bar{D}}^{\ast }$ hadronic molecular and the triangle singularity pictures, and discuss the behaviors of $Z_c(3900)$ at finite temperature in these two different pictures. As a result, we show the properties that its mass becomes smaller and its width becomes larger when the temperature increases, which are seen commonly in the hadronic molecular picture and in the triangle singularity picture. The enhanced widths in hot medium indicate that the $Z_c(3900)$ will be dissociated at a sufficiently high temperature. This feature is also reflected by a decrease of the effective couplings in the hadronic molecular picture. It is concluded that, not only in vacuum but also in hot medium, the behaviors of $Z_c(3900)$ are similar in the two different interpretations of $Z_c(3900)$.

Accepted by PRD

References in corpus (19)

• Multiquark Resonances
• Pentaquark and Tetraquark states
• Exotics: Heavy Pentaquarks and Tetraquarks
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Pion Interactions in the X(3872)
• Is X(3872) {\sl Really} a Molecular State?
• Multi-quark hadrons from Heavy Ion Collisions
• Effect of charmed meson loops on charmonium transitions
• $Z_{cs}(3985{)}^{-}$ as the $U$-spin partner of $Z_c(3900{)}^{-}$ and implication of other states in the ${\text{SU(3)}}_F$ symmetry and heavy quark symmetry
• Remarks on the study of the X(3872) from Effective Field Theory with Pion-Exchange Interaction
• Novel approaches in Hadron Spectroscopy
• Weakly-bound Hadronic Molecule near a 3-body Threshold
• A combined analysis of the $Z_c(3900)$ and the $Z_{cs}(3985)$ exotic states
• Extracting $\pi \pi$ $S$-wave scattering lengths from cusp effect in heavy quarkonium dipion transitions
• Fate of charmed mesons near chiral symmetry restoration in hot matter
• Production of exotic hadrons in $pp$ and nuclear collisions
• Charm and Bottom Hadrons in Hot Hadronic Matter
• $X(3872)$, $X(4014)$, and their bottom partners at finite temperature
• Precise determination of the pole position of the exotic $Z_c(3900)$