Friday, October 20, 2006, 11:00 am — Small Seminar Room, Bldg. 510
It was first suggested by Jedamzik a decade ago that solar mass black holes could have been formed during a first order QCD phase transition in the early universe. The reason is that during a first order phase transition the speed of long wavelength sound waves is zero, implying a
softened equation of state that would allow over-dense regions of space to more easily collapse to a black hole. We have studied the critical over-density necessary to achieve collapse for a variety of QCD equations of state, including parametrizations of a first order phase transition, a second order phase transition, and a rapid crossover. Limits on the abundance of primordial black holes from Jupiter mass to solar mass can provide information on the QCD equation of state.
Hosted by: D. Kharzeev/T. Lappi
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