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Title: New Methods for B Decay Constants and Form Factors from Lattice NRQCD

Abstract

We determine the normalisation of scalar and pseudo scalar current operators made from NonRelativistic QCD (NRQCD) b quarks and Highly Improved Staggered (HISQ) light quarks through O(αs∧QCD/mb). We use matrix elements of these operators to extract B meson decay constants and form factors and compare to those obtained using the standard vector and axial vector operators. We work on MILC second-generation 2+1+1 gluon field configurations, including those with physical light quarks in the sea. This provides a test of systematic uncertainties in these calculations and we find agreement between the results to the 2% level of uncertainty previously quoted.

Authors:
 [1];  [2];  [3]
  1. Glasgow U.
  2. Cambridge U., DAMTP
  3. Rutgers U., Piscataway
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1436709
Report Number(s):
FERMILAB-CONF-17-662-T
1665408
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Journal Name:
EPJ Web Conf.
Additional Journal Information:
Journal Volume: 175; Conference: 35th International Symposium on Lattice Field Theory, Granada, Spain, 06/18-06/24/2017
Country of Publication:
United States
Language:
English

Citation Formats

Davies, Christine, Hughes, Ciaran, and Monahan, Christopher. New Methods for B Decay Constants and Form Factors from Lattice NRQCD. United States: N. p., 2018. Web. doi:10.1051/epjconf/201817514021.
Davies, Christine, Hughes, Ciaran, & Monahan, Christopher. New Methods for B Decay Constants and Form Factors from Lattice NRQCD. United States. doi:10.1051/epjconf/201817514021.
Davies, Christine, Hughes, Ciaran, and Monahan, Christopher. Mon . "New Methods for B Decay Constants and Form Factors from Lattice NRQCD". United States. doi:10.1051/epjconf/201817514021. https://www.osti.gov/servlets/purl/1436709.
@article{osti_1436709,
title = {New Methods for B Decay Constants and Form Factors from Lattice NRQCD},
author = {Davies, Christine and Hughes, Ciaran and Monahan, Christopher},
abstractNote = {We determine the normalisation of scalar and pseudo scalar current operators made from NonRelativistic QCD (NRQCD) b quarks and Highly Improved Staggered (HISQ) light quarks through O(αs∧QCD/mb). We use matrix elements of these operators to extract B meson decay constants and form factors and compare to those obtained using the standard vector and axial vector operators. We work on MILC second-generation 2+1+1 gluon field configurations, including those with physical light quarks in the sea. This provides a test of systematic uncertainties in these calculations and we find agreement between the results to the 2% level of uncertainty previously quoted.},
doi = {10.1051/epjconf/201817514021},
journal = {EPJ Web Conf.},
number = ,
volume = 175,
place = {United States},
year = {2018},
month = {1}
}

Conference:
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Works referenced in this record:

B-physics from Nf = 2 tmQCD: the Standard Model and beyond
journal, March 2014

  • Carrasco, N.; Ciuchini, M.; Dimopoulos, P.
  • Journal of High Energy Physics, Vol. 2014, Issue 3
  • DOI: 10.1007/JHEP03(2014)016

Decay constants of B-mesons from non-perturbative HQET with two light dynamical quarks
journal, July 2014


B -Meson Decay Constants from Improved Lattice Nonrelativistic QCD with Physical u , d , s , and c Quarks
journal, May 2013