Limits on the time variation of the Fermi constant G(F) based on type Ia supernova observations

作者：Ferrero Alejandro^*; Altschul Brett

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010, 82(12): 123002.

DOI：10.1103/PhysRevD.82.123002

The light curve of a type Ia supernova decays at a rate set by the beta-decay lifetimes of the Ni-56 and Co-56 produced in the explosion. This makes such a light curve sensitive to the value of the Fermi constant G(F) at the time of the supernova. Using data from the CfA Supernova Archive, we measure the dependence of the light curve decay rate on redshift and place a bound on the time variation of G(F) of vertical bar G(F)/G(F)vertical bar < 10(-9) yr(-1).

• 出版日期2010-12-6