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Title: Nuclear Kinetic Equilibrium During Big Bang Nucleosynthesis

Abstract

Sasankan et al, have recently claimed that there are significant deviations in the phase-space distributions of the kinetic energies of nuclei from the Maxwell-Boltzmann form usually assumed in BBN, and further, that these deviations lead to big changes in the predicted light-element abundances. Solving the relativistic Boltzmann equation perturbatively, we explicitly show that these deviations are not 20% as claimed, but rather are about 10^-17 in size and hence cannot significantly alter the predicted light-element abundances. We discuss and compute two related effects: O(0.1%) corrections to the kinetic distributions of nuclei that arise from small relativistic corrections to the MB distribution and a much smaller effect, nuclear kinetic drag, which arises from the heat transferred from the EM plasma to nuclei that is needed to maintain kinetic equilibrium.

Authors:
 [1];  [2]
  1. Fermilab
  2. Chicago U.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1488591
Report Number(s):
arXiv:1811.04932; FERMILAB-PUB-18-625-A
1703446
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

McDermott, Samuel D., and Turner, Michael S. Nuclear Kinetic Equilibrium During Big Bang Nucleosynthesis. United States: N. p., 2018. Web.
McDermott, Samuel D., & Turner, Michael S. Nuclear Kinetic Equilibrium During Big Bang Nucleosynthesis. United States.
McDermott, Samuel D., and Turner, Michael S. Mon . "Nuclear Kinetic Equilibrium During Big Bang Nucleosynthesis". United States. https://www.osti.gov/servlets/purl/1488591.
@article{osti_1488591,
title = {Nuclear Kinetic Equilibrium During Big Bang Nucleosynthesis},
author = {McDermott, Samuel D. and Turner, Michael S.},
abstractNote = {Sasankan et al, have recently claimed that there are significant deviations in the phase-space distributions of the kinetic energies of nuclei from the Maxwell-Boltzmann form usually assumed in BBN, and further, that these deviations lead to big changes in the predicted light-element abundances. Solving the relativistic Boltzmann equation perturbatively, we explicitly show that these deviations are not 20% as claimed, but rather are about 10^-17 in size and hence cannot significantly alter the predicted light-element abundances. We discuss and compute two related effects: O(0.1%) corrections to the kinetic distributions of nuclei that arise from small relativistic corrections to the MB distribution and a much smaller effect, nuclear kinetic drag, which arises from the heat transferred from the EM plasma to nuclei that is needed to maintain kinetic equilibrium.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}