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.
|Journal||Physical Review D|
|State||Published - May 1 2020|
Bibliographical noteFunding Information:
The work presented in this paper received financial support by the U.S. Department of Energy, Office of Nuclear Physics, within the framework of the TMD Topical Collaboration. The project is supported in part by the U.S. DOE Grant No. DE-SC0013065. M. C. is partly supported by the National Science Foundation under Grant No. PHY-1714407. Z. L. acknowledges the support of the National Science Foundation of China under Grant No. 11575197. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. Part of the data were generated using resources from the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation Grant No. ACI-1053575. We also thank the National Energy Research Scientific Computing Center (NERSC) for providing High-Performance Computing resources that have contributed to the research results reported within this paper. This work is also supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No. XDC01040100.
© 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