https://doi.org/10.1140/epja/s10050-020-00072-5
Regular Article - Theoretical Physics
The effect of gluon condensate on imaginary potential and thermal width from holography
1
College of Science, China Three Gorges University, Yichang, 443002, China
2
Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOS), Central China Normal University, Wuhan, 430079, China
* e-mail: chenxunhep@qq.com
Received:
4
November
2019
Accepted:
8
January
2020
Published online:
14
February
2020
By the use of the gauge/gravity duality, we calculate the imaginary part of heavy quarkonium potential and thermal width with the effect of gluon condensate which is absent in 
background. Our results show that the dropping gluon condensate reduces the absolute value of imaginary potential and therefore decreases the thermal width both in “exact” and “approximate” approach implying that the heavy quarkonium has a weaker bound with the increase of gluon condensate. In addition, the thermal width will disappear at a critical condensate value, which indicates the dissociation of quarkonium. We conclude that increasing gluon condensate will lead to easier dissociation of heavy quarkonium for fixed temperature.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020
