2025/03/19 by Amruta Mishra, Mishra, Amruta
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2503.15219
openalex publication_date 2025/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The in-medium masses of the pseudoscalar open charm (D, D, Ds and Ds) and open bottom (B, B, Bs and Bs) mesons in hot asymmetric strange hadronic matter are studied within a QCD sum rule approach. These are computed using the medium modifications of the light quark condensates (⟨qiqi⟩, with (qi,i=1,2,3)≡(u,d,s)), the gluon condensates and other operators in the operator product expansion upto mass dimension 5. Within a chiral SU(3) model, the quark condensates are obtained from the medium modifications of the non-strange and strange scalar-isoscalar fields (σ and ζ), and the scalar-isovector field, δ, whereas, the gluon (scalar and twist-2) condensates are computed from the in-medium value of the dilaton field, χ, which is incorporated within the chiral model to mimic the broken scale invariance of QCD. The splittings of the masses of the D- D (B- B), as well as Ds- Ds (Bs- Bs) in the hadronic medium are due to the odd part of the spectral function. For the strange-charm (strange-bottom) mesons ((qi,i=3)≡ s), the value of ⟨ qi^† qi ⟩ dominates over the contributions from the other operators of the odd part of the spectral function. This is observed as opposite behaviour of the particle-antiparticle mass splittings with the mass of the particle to be larger (smaller) than the antiparticle mass in nuclear (hyperonic) matter. The density and isospin asymmetry effects are observed to be the dominant medium effects which might have observable consequences on the production of charmonia and open charm mesons, and, on the production ratios, D+/D- and D0/ D0, in asymmetric heavy ion collisions in the CBM experiment at FAIR at the future facility at GSI.