2016/05/17 by Enis Yazici, Yazici, Enis
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.1605.05289
openalex publication_date 2016/05/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The masses and the leptonic decay constants of vector and axial vector heavy-heavy mesons are calculated using the thermal QCD sum rules approach. While obtaining the QCD sum rules, additional operators in the Wilson expansion and also temperature dependency of the continuum threshold are taken into account. The masses and the decay constants remained unchanged up to T≃100~MeV. After that point, they start to diminish. At the critical temperature, the masses decreased about 3%, 5% and 14% for the vector mesons Υ, Bc and J/ψ; 6%, 7% and 22% for the axial vector mesons χb1, Bc and χc1, respectively. The decay constants reached about less than 20% of their vacuum values. The obtained results of the thermal mass and decay constant calculations at zero temperature are in a very good agreement with the other non-perturbative calculations at vacuum as well as with the experimental data.