Abstract
We investigate the effect on the light element abundances from the presence of a primordial magnetic field (PMF) whose strength is spatially inhomogeneous. By assuming an uniform total energy density with a gaussian distribution of field strength, we find that domains of different temperatures exist in the BBN epoch due to variations in the local PMF. As a result, the effective distribution function of particle velocities averaged over domains of different temperatures deviates from the Maxwell-Boltzmann distribution. We perform BBN calculations including this effect and find that the \(^7\)Li abundance is significantly reduced. We also discuss the possibility that the baryon-to-photon ratio decreased after the BBN epoch. In this case, if the ratio during BBN was larger than the cosmic microwave background constraint, all produced light elements are consistent with observational data.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
