An estimate of the K-0-K-0 mixing amplitude

Authors
Becirevic, D Meloni, D Retico, A
Citation
D. Becirevic et al., An estimate of the K-0-K-0 mixing amplitude, J HIGH EN P, 2001(1), 2001, pp. NIL_278-NIL_296
Citations number
52
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
10298479 → ACNP
Volume
2001
Issue
1
Year of publication
2001
Pages
NIL_278 - NIL_296
Database
ISI
SICI code
1029-8479(200101)2001:1<NIL_278:AEOTKM>2.0.ZU;2-R
Abstract
We computed the B-K parameter on the lattice by using a non-perturbatively improved Wilson action. From our quenched simulation we obtain B-K((MS) ove r bar) (2 GeV) = 0.73(7)(-0.01)(+0.05). To gain some insight in the systema tic errors due to the use of the quenched approximation, we also made the u nquenched computation with Wilson fermions. We do not observe any significa nt deviation with respect to the quenched result.