Cargando…
Towards a non-perturbative matching of HQET and QCD with dynamical light quarks
We explain how the strategy of solving renormalization problems in HQET non-perturbatively by a matching to QCD in finite volume can be implemented to include dynamical fermions. As a primary application, some elements of an HQET computation of the mass of the b-quark beyond the leading order with N...
Autores principales: | , , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2007
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/1061145 |
_version_ | 1780913172766523392 |
---|---|
author | Della Morte, Michele Fritzsch, Patrick Heitger, Jochen Meyer, Harvey B. Simma, Hubert Sommer, Rainer |
author_facet | Della Morte, Michele Fritzsch, Patrick Heitger, Jochen Meyer, Harvey B. Simma, Hubert Sommer, Rainer |
author_sort | Della Morte, Michele |
collection | CERN |
description | We explain how the strategy of solving renormalization problems in HQET non-perturbatively by a matching to QCD in finite volume can be implemented to include dynamical fermions. As a primary application, some elements of an HQET computation of the mass of the b-quark beyond the leading order with N_f=2 are outlined. In particular, the matching of HQET and QCD requires relativistic QCD simulations in a volume with L ~ 0.5 fm, which will serve to quantitatively determine the heavy quark mass dependence of heavy-light meson observables in the continuum limit of finite-volume two-flavour lattice QCD. As a preparation for the latter, we report on our determination of the renormalization constants and improvement coefficients relating the renormalized current and subtracted bare quark mass in the relevant weak coupling region. The calculation of these coefficients employs a constant physics condition in the Schroedinger functional scheme, where the box size L is fixed by working at a prescribed value of the renormalized coupling. |
id | cern-1061145 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2007 |
record_format | invenio |
spelling | cern-10611452019-10-04T11:30:58Zhttp://cds.cern.ch/record/1061145engDella Morte, MicheleFritzsch, PatrickHeitger, JochenMeyer, Harvey B.Simma, HubertSommer, RainerTowards a non-perturbative matching of HQET and QCD with dynamical light quarksParticle Physics - LatticeWe explain how the strategy of solving renormalization problems in HQET non-perturbatively by a matching to QCD in finite volume can be implemented to include dynamical fermions. As a primary application, some elements of an HQET computation of the mass of the b-quark beyond the leading order with N_f=2 are outlined. In particular, the matching of HQET and QCD requires relativistic QCD simulations in a volume with L ~ 0.5 fm, which will serve to quantitatively determine the heavy quark mass dependence of heavy-light meson observables in the continuum limit of finite-volume two-flavour lattice QCD. As a preparation for the latter, we report on our determination of the renormalization constants and improvement coefficients relating the renormalized current and subtracted bare quark mass in the relevant weak coupling region. The calculation of these coefficients employs a constant physics condition in the Schroedinger functional scheme, where the box size L is fixed by working at a prescribed value of the renormalized coupling.We explain how the strategy of solving renormalization problems in HQET non-perturbatively by a matching to QCD in finite volume can be implemented to include dynamical fermions. As a primary application, some elements of an HQET computation of the mass of the b-quark beyond the leading order with N_f=2 are outlined. In particular, the matching of HQET and QCD requires relativistic QCD simulations in a volume with L ~ 0.5 fm, which will serve to quantitatively determine the heavy quark mass dependence of heavy-light meson observables in the continuum limit of finite-volume two-flavour lattice QCD. As a preparation for the latter, we report on our determination of the renormalization constants and improvement coefficients relating the renormalized current and subtracted bare quark mass in the relevant weak coupling region. The calculation of these coefficients employs a constant physics condition in the Schroedinger functional scheme, where the box size L is fixed by working at a prescribed value of the renormalized coupling.arXiv:0710.1188CERN-PH-TH-2007-171MS-TP-07-32MIT-CTP-3878DESY-07-166SFB-CPP-07-61CERN-PH-TH-2007-171MS-TP-07-32MIT-CTP 3878DESY 07-166SFB-CPP-07-61oai:cds.cern.ch:10611452007-10-08 |
spellingShingle | Particle Physics - Lattice Della Morte, Michele Fritzsch, Patrick Heitger, Jochen Meyer, Harvey B. Simma, Hubert Sommer, Rainer Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title | Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title_full | Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title_fullStr | Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title_full_unstemmed | Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title_short | Towards a non-perturbative matching of HQET and QCD with dynamical light quarks |
title_sort | towards a non-perturbative matching of hqet and qcd with dynamical light quarks |
topic | Particle Physics - Lattice |
url | http://cds.cern.ch/record/1061145 |
work_keys_str_mv | AT dellamortemichele towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks AT fritzschpatrick towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks AT heitgerjochen towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks AT meyerharveyb towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks AT simmahubert towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks AT sommerrainer towardsanonperturbativematchingofhqetandqcdwithdynamicallightquarks |