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arXiv · 1611.00344

Axial-Current Matrix Elements in Light Nuclei from Lattice QCD

Martin J. Savage·Phiala E. Shanahan·Brian C. Tiburzi·Michael L. Wagman·Frank Winter·Silas R. Beane·Emmanuel Chang·Zohreh Davoudi·William Detmold·Kostas Orginos
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Abstract

I present results from the first lattice QCD calculations of axial-current matrix elements in light nuclei, performed by the NPLQCD collaboration. Precision calculations of these matrix elements, and the subsequent extraction of multi-nucleon axial-current operators, are essential in refining theoretical predictions of the proton-proton fusion cross section, neutrino-nucleus cross sections and $ββ$-decay rates of nuclei. In addition, they are expected to shed light on the phenomenological quenching of $g_A$ that is required in nuclear many-body calculations.

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Martin J. Savage, Phiala E. Shanahan, Brian C. Tiburzi, Michael L. Wagman, Frank Winter, Silas R. Beane, Emmanuel Chang, Zohreh Davoudi, William Detmold, Kostas Orginos. 2016-11-01. Axial-Current Matrix Elements in Light Nuclei from Lattice QCD. https://arxiv.org/abs/1611.00344

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