# Properties of heavy mesons at finite temperature

### Submission summary

 As Contributors: Gloria Montana Arxiv Link: https://arxiv.org/abs/1910.01384v1 (pdf) Date accepted: 2020-01-24 Date submitted: 2019-10-04 02:00 Submitted by: Montana, Gloria Submitted to: SciPost Physics Proceedings Proceedings issue: 24th European Few Body Conference (University of Surrey, U.K.) Academic field: Physics Specialties: High-Energy Physics - Theory High-Energy Physics - Phenomenology Approach: Theoretical

### Abstract

We study the properties of heavy mesons using a unitarized approach in a hot pionic medium, based on an effective hadronic theory. The interaction between the heavy mesons and pseudoscalar Goldstone bosons is described by a chiral Lagrangian at next-to-leading order in the chiral expansion and leading order in the heavy-quark mass expansion so as to satisfy heavy-quark spin symmetry. The meson-meson scattering problem in coupled channels with finite-temperature corrections is solved in a self-consistent manner. Our results show that the masses of the ground-state charmed mesons $D(0^-)$ and $D_s(1^-)$ decrease in a pionic environment at $T\neq 0$ and they acquire a substantial width. As a consequence, the behaviour of excited mesonic states (i.e. $D_{s0}^*(2317)^\pm$ and $D_0^*(2300)^{0,\pm}$), generated dynamically in our heavy-light molecular model, is also modified at $T\neq 0$. The aim is to test our results against Lattice QCD calculations in the future.

Published as SciPost Phys. Proc. 3, 038 (2020)

### Submission & Refereeing History

Submission 1910.01384v1 on 4 October 2019

## Reports on this Submission

### Anonymous Report 1 on 2020-1-13 (Contributed Report)

• Cite as: Anonymous, Report on arXiv:1910.01384v1, delivered 2020-01-13, doi: 10.21468/SciPost.Report.1449

### Report

The proceedings contribution "Properties of heavy mesons at finite temperature" by Montaña, Ramos and Tolos provides a very clear summary of recent progress of the theoretical description of heavy mesons in a hot pion environment at equilibrium and in finite-temperature conditions. I feel the write-up is very clear, with a transparent justification, an illustrative description of the theoretical techniques and a succinct description of relevant results (including an analysis of loops in the appendix). I feel this goes beyond expectations in a proceedings contribution and fully endorse the publication.

### Requested changes

I do have however a list of minor requests for clarification that I hope the authors can incorporate at the proofing stage.

1) Eq. (5): I don't think the C_LO, C_24 and C_35 constants have been introduced before. Could the authors provide a brief description of their meaning?
2) Immediately before Eq. (8): "the most general expression" seems to indicate there is a freedom of choice in getting Eq. (8). Is this the case, or is the expression dictated by IFT? Along these lines, I feel a general readership would benefit from references on how these integrals are computed (eg direct numerical integration or using the techniques outlined in Ref [9]?).
3) Eq. (9): is there a missing \omega in the first term of the second line?

I recommend publication of this comprehensive and clear contribution for the European Few-Body Conference, on the basis that it provides a clear description of timely theoretical work in hadronic physics.

• validity: high
• significance: good
• originality: good
• clarity: top
• formatting: excellent
• grammar: excellent