Koponen, J., Davies, C. , Donald, G., Follana, E., Lepage, G. P., Na, H. and Shigemitsu, J. (2011) The D to K and D to pi semileptonic decay form factors from Lattice QCD. In: XXIX International Symposium on Lattice Field Theory - Lattice 2011, Squaw Valley, Lake Tahoe, CA, USA, 10-16 July 2011,
|
Text
90926.pdf - Accepted Version Available under License Creative Commons Attribution Non-commercial Share Alike. 2MB |
Publisher's URL: http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=139
Abstract
We present a new and very high statistics study of D and D<sub>s</sub> semileptonic decay form factors on the lattice. We work with MILC N<sub>f</sub> = 2+1 lattices and use the Highly Improved Staggered Action (HISQ) for both the charm and the light valence quarks. We use both scalar and vector currents to determine the form factors f<sub>0</sub>(q<sup>2</sup>) and f+(q<sup>2</sup>) for a range of D and Ds form factors including those for D to p and D to K semileptonic decays. By using a phased boundary condition we are able to tune accurately to q<sup>2</sup> = 0. We also compare the shape in q<sup>2</sup> to that from experiment. We show that the form factors are very insensitive to the spectator quark: D to K and D<sub>s</sub> to h<sub>s</sub> form factors are essentially the same, and the same is true for D to p and D<sub>s</sub> to K. This has important implications when considering the corresponding B/B<sub>s</sub> processes.
Item Type: | Conference Proceedings |
---|---|
Status: | Published |
Refereed: | No |
Glasgow Author(s) Enlighten ID: | Follana, Dr Eduardo and Koponen, Dr Jonna and Shigemitsu, Prof Junko and Davies, Professor Christine and Donald, Dr Gordon |
Authors: | Koponen, J., Davies, C., Donald, G., Follana, E., Lepage, G. P., Na, H., and Shigemitsu, J. |
Subjects: | Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Copyright Holders: | Copyright © 2011 The Authors |
Publisher Policy: | Reproduced under a Creative Commons License |
Related URLs: |
University Staff: Request a correction | Enlighten Editors: Update this record