Spectrum of the heavy axial vector χ_b1(1P) and χ_c1(1P) mesons in thermal QCD

2012/05/25 by E. Veli Veliev, Veliev, E. Veli, K. Azizi +6
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.1205.5703

14 pages, 9 figures, 2 tables

arxiv created 2012/05/25 · arxiv updated 2012/05/28

Abstract

Using the additional operators coming up at finite temperature, we calculate the masses and decay constants of the P wave heavy axial-vector χ_b1 and χ_c1 quarkonia in the framework of thermal QCD sum rules. In the calculations, we take into account the perturbative two loop order alpha_s corrections and nonperturbative effects up to the dimension four condensates. It is observed that the masses and decay constants almost remain unchanged with respect to the variation of the temperature up to T ≃ 100 MeV, however after this point, the decay constants decrease sharply and approach approximately to zero at critical temperature. The decreasing in values of the masses is also considerable after T ≃ 100 MeV .

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