• Corpus ID: 6711089

# Quantifying the Sensitivity of Big Bang Nucleosynthesis to Isospin Breaking

@inproceedings{Heffernan2016QuantifyingTS,
title={Quantifying the Sensitivity of Big Bang Nucleosynthesis to Isospin Breaking},
author={Matthew Heffernan and Projjwal Banerjee and Andr{\'e} Walker-Loud},
year={2016}
}
• Published 15 June 2017
• Physics
We perform the first quantitative study of the sensitivity of Big Bang Nucleosynthesis to variations in isospin breaking with precise input from lattice QCD calculations. The predicted light nuclear abundances are most sensitive to the neutron-proton mass splitting as both the initial relative abundance of neutrons to protons and the $n \rightleftharpoons p$ weak reaction rates are very sensitive to this quantity. Lattice QCD has been used to determine this mass splitting to greater than 5…
4 Citations

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## References

SHOWING 1-10 OF 98 REFERENCES
Quark mass variation constraints from Big Bang nucleosynthesis
• Physics
• 2011
We study the impact on the primordial abundances of light elements created of a variation of the quark masses at the time of Big Bang nucleosynthesis (BBN). In order to navigate through the particle
Quark-mass variation effect on big bang nucleosynthesis
• Physics
• 2012
We calculate the effect of variation in the light-current quark mass, mq, on standard big bang nucleosynthesis. A change in mq at during the era of nucleosynthesis affects nuclear reaction rates, and
Strong isospin violation and chiral logarithms in the baryon spectrum
• Physics
• 2016
We present a precise lattice QCD calculation of the contribution to the neutron-proton mass splitting arising from strong isospin breaking, $m_n-m_p|_{QCD}=2.32\pm0.17$ MeV. We also determine
BBN and Lambda_QCD
• Physics
• 2003
Big Bang Nucleosynthesis (BBN) has increasingly become the tool of choice for investigating the permitted variation of fundamental constants during the earliest epochs of the Universe. Here we
Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED
• Physics
• 2015
Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor
Constraining the variation of the coupling constants with big bang nucleosynthesis
• Physics
• 2002
We consider the possibility of the coupling constants of the $SU(3)\times SU(2)\times U(1)$ gauge interactions at the time of big bang nucleosynthesis having taken different values from what we
Big Bang Nucleosynthesis: 2015
• Physics
• 2015
Big-bang nucleosynthesis (BBN) describes the production of the lightest nuclides via a dynamic interplay among the four fundamental forces during the first seconds of cosmic time. We briefly overview
Precision Prediction for the Big-Bang Abundance of Primordial Helium
• Physics
• 1998
Within the standard models of particle physics and cosmology we have calculated the big-bang prediction for the primordial abundance of 4He to a theoretical uncertainty of less than 0.1% (δYP <
Dependence of nuclear binding on hadronic mass variation
• Physics
• 2007
We examine how the binding of light (A {le} 8) nuclei depends on possible variations of hadronic masses, including meson, nucleon, and nucleon-resonance masses. Small variations in hadronic masses