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Title: B -> d* l nu and b -> d l nu form-factors in staggered chiral perturbation theory

Abstract

We calculate the B {yields} D and B {yields} D* form factors at zero recoil in Staggered Chiral Perturbation Theory. We consider heavy-light mesons in which only the light (u, d, or s) quark is staggered; current lattice simulations generally use a highly improved action such as the Fermilab or NRQCD action for the heavy (b or c) quark. We work to lowest order in the heavy quark expansion and to next-to-leading order in the chiral expansion. We present results for a partially quenched theory with three sea quarks in which there are no mass degeneracies (the ''1+1+1'' theory) and for a partially quenched theory in which the u and d sea quark masses are equal (the ''2+1'' theory). We also present results for full (2+1) QCD, along with a numerical estimate of the size of staggered discretization errors. Finally, we calculate the finite volume corrections to the form factors and estimate their numerical size in current lattice simulations.

Authors:
; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
879125
Report Number(s):
FERMILAB-PUB-05-534-T
arXiv eprint number hep-lat/0512007; TRN: US0700926
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.D73:054501,2006
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FERMILAB; FORM FACTORS; MESONS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; SEAS; Lattice, Phenomenology-HEP

Citation Formats

Laiho, Jack, Van de Water, Ruth S., and /Fermilab. B -> d* l nu and b -> d l nu form-factors in staggered chiral perturbation theory. United States: N. p., 2005. Web.
Laiho, Jack, Van de Water, Ruth S., & /Fermilab. B -> d* l nu and b -> d l nu form-factors in staggered chiral perturbation theory. United States.
Laiho, Jack, Van de Water, Ruth S., and /Fermilab. Thu . "B -> d* l nu and b -> d l nu form-factors in staggered chiral perturbation theory". United States. doi:. https://www.osti.gov/servlets/purl/879125.
@article{osti_879125,
title = {B -> d* l nu and b -> d l nu form-factors in staggered chiral perturbation theory},
author = {Laiho, Jack and Van de Water, Ruth S. and /Fermilab},
abstractNote = {We calculate the B {yields} D and B {yields} D* form factors at zero recoil in Staggered Chiral Perturbation Theory. We consider heavy-light mesons in which only the light (u, d, or s) quark is staggered; current lattice simulations generally use a highly improved action such as the Fermilab or NRQCD action for the heavy (b or c) quark. We work to lowest order in the heavy quark expansion and to next-to-leading order in the chiral expansion. We present results for a partially quenched theory with three sea quarks in which there are no mass degeneracies (the ''1+1+1'' theory) and for a partially quenched theory in which the u and d sea quark masses are equal (the ''2+1'' theory). We also present results for full (2+1) QCD, along with a numerical estimate of the size of staggered discretization errors. Finally, we calculate the finite volume corrections to the form factors and estimate their numerical size in current lattice simulations.},
doi = {},
journal = {Phys.Rev.D73:054501,2006},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}