Scaling test for Wilson twisted mass QCD - INSPIRE

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Scaling test for Wilson twisted mass QCD

XLF

Collaboration

•

Karl Jansen
(
- NIC, Zeuthen and
- DESY, Zeuthen
)

Dec, 2003

15 pages

Published in:

Phys.Lett.B 586 (2004) 432-438

e-Print:

hep-lat/0312013 [hep-lat]

DOI:

10.1016/j.physletb.2004.01.030

Report number:

DESY-03-198,
SFB-CPP-03-56

View in:

ADS Abstract Service

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Abstract:

We present a first scaling test of twisted mass QCD with pure Wilson quarks for a twisting angle of pi/2. We have computed the vector meson mass and the pseudoscalar decay constant for different values of beta at fixed value of r_0 m_PS. The results obtained in the quenched approximation are compared with data for pure Wilson and non-perturbatively O(a) improved Wilson computations. We show that our results from Wilson twisted mass QCD show clearly reduced lattice spacing errors, consistent with O(a) improvement and without the need of any improvement terms added. These results thus provide numerical evidence of the prediction in ref. [1].

Note:

15 pages, 4 figures: v2: two typos corrected, accepted for publication in Phys. Lett. B Report-no: DESY 03-198, SFB/CPP-03-56

fermion: lattice field theory
gauge field theory: SU(3)
mass: twist
vector meson: mass
pseudoscalar meson: decay constant
scaling
approximation: quenching
numerical calculations: Monte Carlo

References(20)

Figures(0)

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