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Title: Quark mass variation constraints from Big Bang nucleosynthesis

Quark mass variation constraints from Big Bang nucleosynthesis 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 and nuclear physics required to connect quark masses to binding energies and reaction rates in a model-independent way we use lattice QCD data and an hierarchy of effective field theories. We find that the measured {sup 4}He abundances put a bound of {delta}-1% {approx}< m{sub q}/m{sub 1} {approx}< 0.7%. The effect of quark mass variations on the deuterium abundances can be largely compensated by changes of the baryon-to-photon ratio {eta}. Including the bounds on the variation of {eta} coming from WMAP results and some additional assumptions narrows the range of allowed values of {delta}m{sub q}/m{sub q} somewhat.
Authors: ; ;
Publication Date:
OSTI Identifier:OSTI ID: 1018816
Report Number(s):LLNL-JRNL-465219
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1103475
DOE Contract Number:W-7405-ENG-48
Resource Type:Journal Article
Resource Relation:Journal Name: Physical Review C, vol. 83, n/a, April 15, 2011, pp. 045803; Journal Volume: 83
Research Org:Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:USDOE
Country of Publication:United States
Language:English
Subject: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DEUTERIUM; FIELD THEORIES; NUCLEAR PHYSICS; NUCLEOSYNTHESIS; QUANTUM CHROMODYNAMICS; QUARKS; REACTION KINETICS