Abstract
In this work we present the isovector flavor combination for the nucleon tensor charge extracted from lattice QCD simulations using overlap fermions on Nf=2+1 domain-wall configurations. The pion mass dependence is studied using six valence quark masses, each reproducing a value for the pion mass in the valence sector between 147 and 330 MeV. We investigate and eliminate systematic uncertainties due to contamination by excited states, by employing several values for the source-sink separation that span from 1 to 1.6 fm. We apply a chiral extrapolation in the valence sector using a quadratic and a logarithmic term to fit the pion mass dependence, which describes well the lattice data. The lattice matrix element is renormalized nonperturbatively, and the final result is gT=1.096(30) in the MS¯ scheme at a renormalization scale of 2 GeV.
| Original language | English |
|---|---|
| Article number | 094501 |
| Journal | Physical Review D |
| Volume | 101 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 1 2020 |
Bibliographical note
Publisher Copyright:© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP
ASJC Scopus subject areas
- Nuclear and High Energy Physics