Non-perturbative improvement of quark mass renormalization in two-flavour lattice QCD - INSPIRE

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Non-perturbative improvement of quark mass renormalization in two-flavour lattice QCD

Patrick Fritzsch
(
- Southampton U. and
- Munster U., ITP
)
,
Jochen Heitger
(
- Munster U., ITP
)
,
Nazario Tantalo
(
- Rome U., Tor Vergata and
- INFN, Rome2 and
- Enrico Fermi Ctr., Rome
)

Apr, 2010

29 pages

Published in:

JHEP 08 (2010) 074

e-Print:

1004.3978 [hep-lat]

DOI:

10.1007/JHEP08(2010)074

Report number:

MS-TP-10-06,
SHEP-1010

View in:

ADS Abstract Service

reference search47 citations

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Abstract: (arXiv)

We non-perturbatively determine the renormalization constant and the improvement coefficients relating the renormalized current and subtracted quark mass in O(a) improved two-flavour lattice QCD. We employ the Schr\'odinger functional scheme and fix the physical extent of the box by working at a constant value of the renormalized coupling. Our calculation yields results which cover two regions of bare parameter space. One is the weak-coupling region suitable for volumes of about half a fermi. By making simulations in this region, quarks as heavy as the bottom can be propagated with the full relativistic QCD action and renormalization problems in HQET can be solved non-perturbatively by a matching to QCD in finite volume. The other region refers to the common parameter range in large-volume simulations of two-flavour lattice QCD, where our results have particular relevance for charm physics applications.

Lattice QCD
Quark Masses and SM Parameters
Nonperturbative Effects
Heavy Quark Physics
quark: mass
mass: renormalization
quantum chromodynamics: action
flavor: 2
nonperturbative
weak coupling

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Figures(0)

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