Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-11-22
Astropart.Phys.29:223-227,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, no figure. v3: refereed version
Scientific paper
10.1016/j.astropartphys.2008.02.
The formation of a strange or hybrid star from a neutron star progenitor is believed to occur when the central stellar density exceeds a critical value. If the transition from hadron to quark matter is of first order, the event has to release a huge amount of energy in a very short time and we would be able to observe the phenomenon even if it is at cosmological distance far from us; most likely, such violent quark deconfinement would be associated with at least a fraction of the observed gamma ray bursts. If we allow for temporal variations of fundamental constants like $\Lambda_{QCD}$ or $G_N$, we can expect that neutron stars with an initial central density just below the critical value can enter into the region where strange or hybrid stars are the true ground state. From the observed rate of long gamma ray bursts, we are able to deduce the constraint $\dot{G}_N/G_N \lesssim 10^{-17} {\rm yr^{-1}}$, which is about 5 orders of magnitude more stringent than the strongest previous bounds on a possible increasing $G_N$.
Bambi Cosimo
Drago Alessandro
No associations
LandOfFree
Constraints on temporal variation of fundamental constants from GRBs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraints on temporal variation of fundamental constants from GRBs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on temporal variation of fundamental constants from GRBs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-310790