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

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