Abstract

We consider the string breaking phenomenon within effective string models which purport to mimic QCD with two light flavors, with a special attention to baryon modes. We make some estimates of the string breaking distances at zero and non-zero baryon chemical potentials. Our estimates point towards the enhancement of baryon production in strong decays of heavy mesons in dense baryonic matter. We also suggest that the enhanced production of $\Lambda_c^+$ baryons in PbPb collisions is mainly due to larger values of chemical potential.

Highlights

  • In the string models, the strong decay of hadrons is described through light quark-antiquark pair creation [1]

  • It is true that the meson mode is dominant in the vacuum, there are other decay modes which might be of interest for the physics of strong interactions

  • The string rearrangement may occur in the same way as it does in the case of the meson mode

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Summary

INTRODUCTION

The strong decay of hadrons is described through light quark-antiquark pair creation [1]. Apart from the string models, the string breaking phenomenon has been studied by lattice gauge theory simulations [3] This provides reliable results, but limited to the results for the meson mode at zero temperature and zero chemical potential. EQQðlÞ is the energy of two static heavy quark sources separated by distance l and connected by a string, 2EQqis the energy of a noninteracting pair of heavy-light mesons, and the off-diagonal matrix element g describes the mixing between these two states. The eigenvalues of this model Hamiltonian correspond to the energy levels of a system containing a static quark-antiquark pair. There have been several papers on this subject in the literature. here, we go another way to describe disconnected string configurations that is a real alternative to probe flavor branes

Preliminaries
String breaking
Deeply inside the hadronic phase
Near the critical line
EXAMPLE
More details
Numerics
CONCLUSIONS
Configurations without light quarks
Findings
Configurations with light quarks

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