arXiv subjects

Gulsah Kaya

Publications and source records attributed to Gulsah Kaya.

3 recordsLinked to original sources

arXiv2010

Spectral Density of (Pseudo)Scalar Currents at Finite Temperature

We study the spectral densities of (pseudo)scalar currents at finite temperature in general case when mass of two quarks are different. Such spectral densities are necessary for the phenomenological investigation of hadronic parameters. We use quark propagator at finite temperature and show that an additional branch cut arises in spectral density, which corresponds to particle absorption from the medium. The obtained results at T \rightarrow 0 limit are in good agreement with the vacuum results.

hep-ph↗

arXiv2010

The Mass and Leptonic Decay Constant of Ds0(2317) Meson in the framework of thermal QCD sum rules

In the present work, we assume D_{s0}(2317) meson as the c\bar{s} state and study its parameters at finite temperature using QCD sum rules. It is calculated the annihilation and scattering parts of spectral function in the lowest order of perturbation theory. Taking into account perturbative two-loop order α_{s} corrections and nonperturbative corrections up to the dimension six condensates it is investigated the temperature dependences of mass and leptonic decay constant of D_{s0}(2317) meson.

hep-ph↗

arXiv2009

Leptonic Decay Constants of $D_{s}$ and $B_{s}$ Mesons at Finite Temperature

In the present work, $D_{s}$ and $B_{s}$ meson parameters are investigated in the framework of thermal QCD sum rules. The temperature dependence of the mass and the leptonic decay constants are investigated by using Borel transform sum rules and Hilbert moment sum rules. To increase sensitivity, the vacuum contributions are subtracted from thermal expressions and the temperature dependences of the leptonic decay constants and meson masses are studied.

hep-ph↗