B > d* l nu and b > d l nu formfactors 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 heavylight 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 nexttoleading 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):
 FERMILABPUB05534T
arXiv eprint number heplat/0512007; TRN: US0700926
 DOE Contract Number:
 AC0276CH03000
 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, PhenomenologyHEP
Citation Formats
Laiho, Jack, Van de Water, Ruth S., and /Fermilab. B > d* l nu and b > d l nu formfactors 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 formfactors 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 formfactors 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 formfactors 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 heavylight 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 nexttoleading 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}
}

We calculate the B{yields}D and B{yields}D* form factors at zero recoil in staggered chiral perturbation theory. We consider heavylight 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 nonrelativistic QCD action for the heavy (b or c) quark. We work to lowest nontrivial order in the heavyquark expansion and to oneloop 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 partiallymore »

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