Berengut, J. C.
[Author];
Epelbaum, E.
[Author];
Flambaum, V. V.
[Author];
Hanhart, C.
[Author];
Meißner, Ulf-G.
[Author];
Nebreda, J.
[Author];
Peláez, J. R.
[Author]
Varying the light quark mass: Impact on the nuclear force and big bang nucleosynthesis
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Media type:
E-Article
Title:
Varying the light quark mass: Impact on the nuclear force and big bang nucleosynthesis
Contributor:
Berengut, J. C.
[Author];
Epelbaum, E.
[Author];
Flambaum, V. V.
[Author];
Hanhart, C.
[Author];
Meißner, Ulf-G.
[Author];
Nebreda, J.
[Author];
Peláez, J. R.
[Author]
imprint:
Soc., 2013
Published in:Physical review / D 87(8), 085018 (2013). doi:10.1103/PhysRevD.87.085018
Footnote:
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Description:
The quark mass dependences of light element binding energies and nuclear scattering lengths are derived using chiral perturbation theory in combination with non-perturbative methods. In particular, we present new, improved values for the quark mass dependence of meson resonances that enter the nuclear force. A detailed analysis of the theoretical uncertainties arising in this determination is presented. As an application we derive from a comparison of observed and calculated primordial deuterium and helium abundances a stringent limit on the variation of the light quark mass, $\delta m_q/m_q = 0.02 \pm 0.04$. Inclusion of the neutron lifetime modification under the assumption of a variation of the Higgs vacuum expectation value that translates into changing quark, electron, and weak gauge boson masses, leads to a stronger limit, $|\delta m_q/m_q| < 0.009$.