Charmed mesons in nuclei with heavy-quark spin symmetry

TL;DR

This paper investigates the behavior of charmed mesons in dense nuclear matter using a heavy-quark spin symmetry framework, generating resonances and exploring the formation of D-mesic nuclei.

Contribution

It extends the SU(3) Weinberg-Tomozawa model to SU(8) to incorporate heavy-quark spin symmetry and dynamically generates charmed meson resonances in dense matter.

Findings

Resonances with negative parity are dynamically generated.

Open-charm meson spectral functions are computed in dense matter.

Discussion of D-mesic nuclei formation.

Abstract

We study the properties of charmed pseudoscalar and vector mesons in dense matter within a unitary meson-baryon coupled-channel model which incorporates heavy-quark spin symmetry. This is accomplished by extending the SU(3) Weinberg-Tomozawa Lagrangian to SU(8) spin-flavor symmetry and implementing a suitable flavor symmetry breaking. Several resonances with negative parity are generated dynamically by the s-wave interaction between pseudoscalar and vector meson multiplets with $1/2^+$ and $3/2^+$ baryons. Those states are then compared to experimental data as well as theoretical models. Next, Pauli-blocking effects and meson self-energies are introduced in a self-consistent manner to obtain the open-charm meson spectral functions in a dense nuclear environment. We finally discuss the formation of $D$-mesic nuclei.