Quark mass variation constraints from Big Bang nucleosynthesis
arXiv:1012.3840 · doi:10.1103/PhysRevC.83.045803
Abstract
We study the impact on the primordial abundances of light elements created by 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 a hierarchy of effective field theories. We find that the measured Helium-4 abundances put a bound of -1 % <~ d m_q/m_q <~ 0.7 % on a possible variation of quark masses. The effect of quark mass variations on the deuterium abundances can be largely compensated by changes of the baryon-to-photon ratio eta. Including bounds on the variation of eta coming from WMAP results and adding some additional assumptions further narrows the range of allowed values of d m_q/m_q.
8 pages, 3 figures, figures and references updated
References in corpus (7)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
- Light hadron spectroscopy using domain wall valence quarks on an Asqtad sea
- Coupled Variations of Fundamental Couplings and Primordial Nucleosynthesis
- Strong-Isospin Violation in the Neutron-Proton Mass Difference from Fully-Dynamical Lattice QCD and PQQCD
- Dependence of nuclear binding on hadronic mass variation
- More on the infrared renormalization group limit cycle in QCD
- Pion-mass dependence of three-nucleon observables