Thermal properties of the exotic X(3872) state via QCD sum rule
Department of Physics, Kocaeli University, 41380, Izmit, Turkey
2 Education Faculty, Kocaeli University, 41380, Izmit, Turkey
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Accepted: 9 March 2018
Published online: 10 April 2018
In this work we investigate the X(3872) meson with quantum numbers in the framework of the thermal QCD sum rules method. We use a diquark-antidiquark current with the corresponding quantum numbers and calculate the two-point correlation function including contributions of non-perturbative condensates up to six dimensions. Analysis of the obtained thermal sum rule allows us to study contributions of a medium to the mass and coupling constant of the X(3872) resonance. Our numerical calculations demonstrate that the mass and the meson-current coupling constant are insensitive to the variation of temperature up to MeV; however, after this point, they start to fall by increasing the temperature. At deconfinement temperature, the meson-current coupling constants attain roughly to 34% of the vacuum value.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2018