Weinberg Angle, Neutron Abundance in BBN, and Lifetime
Cheng Tao Yang, Johann Rafelski
arXiv:2603.02652v1 Announce Type: cross
Abstract: The Big-Bang nucleosynthesis (BBN) initial neutron abundance and the neutron lifetime depend on the magnitude of the Fermi coupling constant $G_F$. When allowing for radiative corrections, $G_F$ depends on the symmetry breaking Weinberg angle $s_mathrm{W}$, a free parameter in the standard model of particle physics which could have considerable environmental (e.g. cosmological or temperature) dependence. We establish how the value of $s_mathrm{W}$ influences BBN and neutron lifetime.arXiv:2603.02652v1 Announce Type: cross
Abstract: The Big-Bang nucleosynthesis (BBN) initial neutron abundance and the neutron lifetime depend on the magnitude of the Fermi coupling constant $G_F$. When allowing for radiative corrections, $G_F$ depends on the symmetry breaking Weinberg angle $s_mathrm{W}$, a free parameter in the standard model of particle physics which could have considerable environmental (e.g. cosmological or temperature) dependence. We establish how the value of $s_mathrm{W}$ influences BBN and neutron lifetime.