Hot and dense medium effects on the Bs* and B* multiplets
Abstract
We present an extensive analysis of the in-medium masses and decay constants of the Bs*(5415) and B*(5325) multiplets, including both particles and antiparticles, using QCD sum rules at finite temperature and density. The OPE incorporates the full temperature- and density-dependent contributions from the quark, gluon, and mixed condensates. Computing the strange (Bs*0, B̅s*0), charged (B*±), and neutral (B*0, B̅*0) doublet properties allows us to study the effects of flavor symmetry breaking, strangeness, and heavy-quark decoupling on the beauty vector mesons in the medium. Our results indicate that the mass is remarkably resistant to the medium across the entire multiplet: no state loses more than ∼ 13% of its vacuum value, even at T = Tc and n = 5n0, the extreme conditions explored here. The decay constant is far more sensitive, losing up to ∼ 78% at the same point. Baryon density clearly dominates the medium response, while temperature plays a secondary role until the system approaches the deconfinement crossover. At zero density, every state loses almost the same fraction of its mass and decay constant: mass shifts lie between −(0.5-1.1)% and decay-constant shifts between −(3.9-5.3)%, regardless of charge or flavor, so temperature alone does not distinguish a particle from its antiparticle. At finite baryon density, a clear particle-antiparticle asymmetry emerges: at T = 0 and n = 5n0, the B̅*0 mass decreases by 12.9%, whereas the B*0 mass shifts by only 6.1%, a gap of nearly seven percentage points driven entirely by the vector self-energy. This provides a theoretical basis for the future heavy-ion collision program at RHIC, LHC, FAIR, and NICA.
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BibTeX
@misc{azizi2026dense,
title = {{Hot and dense medium effects on the $B_s^*$ and $B^*$ multiplets}},
author = {K. Azizi and N. Er and J. Y. Süngü},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.22419},
eprint = {2607.22419},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.22419},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Hot and dense medium effects on the B_s^* and B^* multiplets
AU - K. Azizi
AU - N. Er
AU - J. Y. Süngü
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2607.22419
UR - https://arxiv.org/abs/2607.22419
AB - We present an extensive analysis of the in-medium masses and decay constants of the B_s^*(5415) and B^*(5325) multiplets, including both particles and antiparticles, using QCD sum rules at finite temperature and density. The OPE incorporates the full temperature- and density-dependent contributions from the quark, gluon, and mixed condensates. Computing the strange (B_s^*0, B̅_s^*0), charged (B^*±), and neutral (B^*0, B̅^*0) doublet properties allows us to study the effects of flavor symmetry breaking, strangeness, and heavy-quark decoupling on the beauty vector mesons in the medium. Our results indicate that the mass is remarkably resistant to the medium across the entire multiplet: no state loses more than ∼ 13% of its vacuum value, even at T = T_c and n = 5n_0, the extreme conditions explored here. The decay constant is far more sensitive, losing up to ∼ 78% at the same point. Baryon density clearly dominates the medium response, while temperature plays a secondary role until the system approaches the deconfinement crossover. At zero density, every state loses almost the same fraction of its mass and decay constant: mass shifts lie between −(0.5-1.1)% and decay-constant shifts between −(3.9-5.3)%, regardless of charge or flavor, so temperature alone does not distinguish a particle from its antiparticle. At finite baryon density, a clear particle-antiparticle asymmetry emerges: at T = 0 and n = 5n_0, the B̅^*0 mass decreases by 12.9%, whereas the B^*0 mass shifts by only 6.1%, a gap of nearly seven percentage points driven entirely by the vector self-energy. This provides a theoretical basis for the future heavy-ion collision program at RHIC, LHC, FAIR, and NICA.
ER -