caa a22 4500 44587211X CHVBK 20180317145515.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1140/epja/i2011-11110-8 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11110-8 Thermal QCD sum rules study of vector charmonium and bottomonium states [Elektronische Daten] [E. Veliev, K. Azizi, H. Sundu, G. Kaya, A. Türkan] We calculate the masses and leptonic decay constants of the heavy vector quarkonia, J/ψ and ϒ mesons at finite temperature. In particular, considering the thermal spectral density as well as additional operators coming up at finite temperature, the thermal QCD sum rules are acquired. Our numerical calculations demonstrate that the masses and decay constants are insensitive to the variation of temperature up to T ≅ 100 MeV, however after this point, they start to fall altering the temperature. At deconfinement temperature, the decay constants attain roughly to 45% of their vacuum values, while the masses are diminished about 12%, and 2.5% for J/ψ and ϒ states, respectively. The obtained results at zero temperature are in good consistency with the existing experimental data as well as predictions of the other nonperturbative models. SIF, Springer-Verlag Berlin Heidelberg, 2011 Veliev E. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut Azizi K. Physics Division, Faculty of Arts and Sciences, Doğuş University, Acıbadem-Kadıköy, 34722, Istanbul, Turkey aut Sundu H. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut Kaya G. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut Türkan A. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut The European Physical Journal A Springer-Verlag 47/9(2011-09-01), 1-8 1434-6001 47:9<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11110-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11110-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Veliev E. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut NATIONALLICENCE 700 1- Azizi K. Physics Division, Faculty of Arts and Sciences, Doğuş University, Acıbadem-Kadıköy, 34722, Istanbul, Turkey aut NATIONALLICENCE 700 1- Sundu H. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut NATIONALLICENCE 700 1- Kaya G. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut NATIONALLICENCE 700 1- Türkan A. Department of Physics, Kocaeli University, 41380, Izmit, Turkey aut NATIONALLICENCE 773 0- The European Physical Journal A Springer-Verlag 47/9(2011-09-01), 1-8 1434-6001 47:9<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer