Dynamical determination of B_K from improved staggered quarks

Autor:	Elvira Gamiz, Matthew Wingate, J. Shigemitsu, Christine Davies, Sara Collins
Jazyk:	angličtina
Rok vydání:	2005
Předmět:	Physics Quark Particle physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) Flavour High Energy Physics::Phenomenology FOS: Physical sciences Quenched approximation Action (physics) Renormalization High Energy Physics - Lattice Vacuum polarization Scaling
Popis:	The scaling corrections that affected previous staggered calculations of B_K have been proved to be reduced by using improved actions (HYP, Asqtad) in the quenched approximation. This improved behaviour allows us to perform a reliable dynamical calculation of B_K including quark vacuum polarization effects using the MILC (2+1) flavour dynamical configurations. We report here on the results from such dynamical calculation. We also discuss the renormalization effects with the Asqtad action. 6 pages, 2 figures. Talk presented at Lattice 2005 (Dublin). To appear in Proceedings of Science
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b3c30b2ac79b44c1057a6516b6a716d http://arxiv.org/abs/hep-lat/0509188 Zobrazit plný text záznamu