fB and fBs with maximally twisted Wilson fermions

  • We present a lattice QCD calculation of the heavy-light decay constants fB and fBs performed with Nf = 2 maximally twisted Wilson fermions, at four values of the lattice spacing. The decay constants have been also computed in the static limit and the results are used to interpolate the observables between the charmand the infinite-mass sectors, thus obtaining the value of the decay constants at the physical b quark mass. Our preliminary results are fB = 191(14)MeV, fBs = 243(14)MeV, fBs/ fB = 1.27(5). They are in good agreement with those obtained with a novel approach, recently proposed by our Collaboration (ETMC), based on the use of suitable ratios having an exactly known static limit.

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Metadaten
Author:Gregorio Herdoiza, Karl Jansen, Vittorio Lubicz, Cecilia Tarantino, Francesco Sanfilippo, Chris Michael, Andrea ShindlerGND, Silvano Simula, Carsten UrbachORCiDGND
URN:urn:nbn:de:hebis:30:3-274818
ISSN:1824-8039
ArXiv Id:http://arxiv.org/abs/0911.3757
Parent Title (English):Proceedings of Science
Publisher:Scuola Internazionale Superiore di Studi Avanzati
Place of publication:Trieste
Document Type:Conference Proceeding
Language:English
Year of Completion:2012
Year of first Publication:2009
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Creating Corporation:ETM Collaboration
Release Date:2012/12/14
Volume:2009
Page Number:8
First Page:1
Last Page:8
Note:
The XXVII International Symposium on Lattice Field Theory - LAT2009 July 26-31 2009 Peking University, Beijing, China
HeBIS-PPN:416425402
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen

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