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Title: Nucleon Charges from 2+1+1-flavor HISQ and 2+1-flavor clover lattices

Precise estimates of the nucleon charges g A, g S and g T are needed in many phenomenological analyses of SM and BSM physics. In this talk, we present results from two sets of calculations using clover fermions on 9 ensembles of 2+1+1-flavor HISQ and 4 ensembles of 2+1-flavor clover lattices. In addition, we show that high statistics can be obtained cost-effectively using the truncated solver method with bias correction and the coherent source sequential propagator technique. By performing simulations at 4–5 values of the source-sink separation t sep, we demonstrate control over excited-state contamination using 2- and 3-state fits. Using the high-precision 2+1+1-flavor data, we perform a simultaneous fit in a, M π and M πL to obtain our final results for the charges.
Authors:
ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-29008
Journal ID: ISSN 1824-8039
Grant/Contract Number:
AC52-06NA25396; AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
PoS Proceedings of Science
Additional Journal Information:
Journal Volume: 157; Conference: 34. Annual international symposium on lattice field theory (LATTICE2016), Southampton (United Kingdom), 24-30 Jul 2016; Journal ID: ISSN 1824-8039
Publisher:
SISSA
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC); USDOE Laboratory Directed Research and Development (LDRD) Program
Contributing Orgs:
PNDME and NME Collaborations
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics; Nucleon Charges
OSTI Identifier:
1356141

Gupta, Rajan. Nucleon Charges from 2+1+1-flavor HISQ and 2+1-flavor clover lattices. United States: N. p., Web.
Gupta, Rajan. Nucleon Charges from 2+1+1-flavor HISQ and 2+1-flavor clover lattices. United States.
Gupta, Rajan. 2016. "Nucleon Charges from 2+1+1-flavor HISQ and 2+1-flavor clover lattices". United States. doi:. https://www.osti.gov/servlets/purl/1356141.
@article{osti_1356141,
title = {Nucleon Charges from 2+1+1-flavor HISQ and 2+1-flavor clover lattices},
author = {Gupta, Rajan},
abstractNote = {Precise estimates of the nucleon charges gA, gS and gT are needed in many phenomenological analyses of SM and BSM physics. In this talk, we present results from two sets of calculations using clover fermions on 9 ensembles of 2+1+1-flavor HISQ and 4 ensembles of 2+1-flavor clover lattices. In addition, we show that high statistics can be obtained cost-effectively using the truncated solver method with bias correction and the coherent source sequential propagator technique. By performing simulations at 4–5 values of the source-sink separation tsep, we demonstrate control over excited-state contamination using 2- and 3-state fits. Using the high-precision 2+1+1-flavor data, we perform a simultaneous fit in a, Mπ and MπL to obtain our final results for the charges.},
doi = {},
journal = {PoS Proceedings of Science},
number = ,
volume = 157,
place = {United States},
year = {2016},
month = {7}
}