Properties of charmonia in a hot equilibrated medium
- I.N.F.N., Sezione di Bari, I-70126 Bari, Italia, Universita degli Studi di Bari, I-70126 Bari (Italy)
- Instituto de Ciencias del Espacio (IEEC/CSIC) Campus, Universitat Autonoma de Barcelona, Facultat de Ciencies, Torre C5, E-08193 Bellaterra (Barcelona), Catalonia (Spain)
We investigate the properties of charmonia in a thermal medium, showing that with increasing temperature the decay widths of these mesons behave in a nontrivial way. Our analysis is based on a potential model with interaction potential extracted from thermal lattice QCD calculations of the free-energy of a static quark-antiquark pair. We find that in the crossover region some decay widths are extremely enhanced. In particular, at temperatures T{approx}T{sub c} the decay widths of the J/{psi} that depend on the value of the wave function at the origin are enhanced with respect to the values in vacuum by about a factor 2. In the same temperature range the decay width of the process {chi}{sub cJ}{yields}J/{psi}+{gamma} is enhanced by approximately a factor 6 with respect to the value in vacuum. At higher temperatures the charmonia states dissociate and the widths of both decay processes become vanishing small.
- OSTI ID:
- 21322580
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevD.80.054004; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Higher-order multipole amplitudes in charmonium radiative transitions
Nonfactorizable contributions to B meson decays into charmonia