\psi^\prime Production and B Decay in Heavy Ion Collisions at LHC

TL;DR

This paper investigates the production of a880 in heavy ion collisions at LHC, emphasizing the dominant role of B-hadron decay over primordial production or regeneration, and analyzes the double ratio compared to p+p collisions.

Contribution

It introduces a transport approach to analyze the a880/a880 ratio, highlighting B decay as the main source in heavy ion collisions at LHC.

Findings

Primordial production and regeneration are negligible for a880 in LHC heavy ion collisions.

The double ratio is mainly governed by B-hadron decay in semi-central and central collisions.

B decay significantly influences a880 yields compared to initial production.

Abstract

In comparison with J/\psi, the excited charmonium state \psi^\prime is loosely bounded and its yield is dominantly from the B-hadron decay. Based on the transport approach, we study the double ratio of N(\psi^\prime)/N(J/\psi) from A+A collisions to that from p+p collisions at LHC energy. We found that the primordial production in the initial stage and the regeneration in the hot medium are not significant for \psi^\prime production in heavy ion collisions at LHC and the double ratio in semi-central and central collisions is controlled by the B decay.