Charmed Exotics in Heavy Ion Collisions

TL;DR

This paper predicts the existence and enhanced production of charmed multiquark hadrons, such as tetraquarks and pentaquarks, in heavy ion collisions at RHIC and LHC, using theoretical models and discussing their detection methods.

Contribution

It introduces the likelihood of charmed multiquark hadrons in heavy ion collisions and estimates their yields using coalescence and statistical models.

Findings

Charmed tetraquark $T_{cc}$ and pentaquark $ heta_{cs}$ yields are estimated for RHIC and LHC.

Production of charmed multiquark hadrons is expected to be enhanced in ultrarelativistic heavy ion collisions.

Decay modes are discussed to aid experimental detection.

Abstract

Based on the color-spin interaction in diquarks, we argue that charmed multiquark hadrons are likely to exist. Because of the appreciable number of charm quarks produced in central nucleus-nucleus collisions at ultrarelativistic energies, production of charmed multiquark hadrons is expected to be enhanced in these collisions. Using both the quark coalescence model and the statistical hadronization model, we estimate the yield of charmed tetraquark meson $T_{cc}$ and pentaquark baryon $\Theta_{cs}$ in heavy ion collisions at RHIC and LHC. We further discuss the decay modes of these charmed exotic hadrons in order to facilitate their detections in experiments.