Thermal properties of the exotic X(3872) state via QCD sum rule


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Veliev E. , GÜNAYDIN S., Sundu H.

EUROPEAN PHYSICAL JOURNAL PLUS, cilt.133, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 133 Konu: 4
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1140/epjp/i2018-11977-0
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL PLUS

Özet

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.