TY - JOUR
T1 - Semileptonic form factor ratio Bs → Ds/B → D and its application to BR(B0 s → µ+µ−)
AU - Fermilab Lattice and MILC Collaborations
AU - Du, Daping
AU - DeTar, Carleton
AU - Kronfeld, Andreas
AU - Laiho, Jack
AU - Meurice, Yannick
AU - Qiu, Si wei
N1 - Funding Information:
This work was supported in part by the U.S. Department of Energy under Grants No. DE-FG02-91ER40664 (Y.M., D.D.), DE-FE06-ER41446 (C.D.), No. DE-FG02-91ER40677 (D.D) and in part by the U.S. National Science Foundation under Grants PHY0757333 (C.D.) and PHY0903571 (S.-W.Q.). J.L. is supported by the STFC and by the Scottish Universities Physics Alliance. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
Funding Information:
D.D. thanks Aida El-Khadra for several helpful discussions on the perturbation theory. D.D. has also received considerable help from Chris Bouchard, Elizabeth Freeland, James Simone, Jon Bailey, Elvira Gamiz and Ran Zhou, who shared their numerical techniques or codes. Computations for this work were carried out with resources provided by the USQCD Collaboration, the Argonne Leadership Computing Facility, the National Energy Research Scientific Computing Center, and the Los Alamos National Laboratory, which are funded by the Office of Science of the U.S. Department of Energy; and with resources provided by the National Center for Supercomputer Applications, the National Institute for Computational Science, the Pittsburgh Supercomputer Center, the San Diego Supercomputer Center,and the Texas Advanced Computing Center, which are funded through the National Science Foundation Teragrid/XSEDE Program. D.D. was supported in part by the URA Visiting Scholars’ program at Fermilab. This work was supported in part by the U.S. Department of Energy under Grants No. DE-FG02-91ER40664 (Y.M., D.D.), DE-FE06-ER41446 (C.D.), No. DE-FG02-91ER40677 (D.D) and in part by the U.S. National Science Foundation under Grants PHY0757333 (C.D.) and PHY0903571 (S.-W.Q.). J.L. is supported by the STFC and by the Scottish Universities Physics Alliance. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
Publisher Copyright:
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PY - 2011
Y1 - 2011
N2 - We present a (2+1)-flavor lattice QCD calculation of the form factor ratio between the semileptonic decays B¯0 s → D+ s l−ν¯ and B¯0 → D+l−ν¯. This ratio is an important theoretical input to the hadronic determination of the Bmeson fragmentation fraction ratio fs/fd which enters in the measurement of BR(B0 s → µ+µ−). Small lattice spacings and high statistics enable us to simulate the decays with a dynamic final D meson of small momentum and reliably extract the hadronic matrix elements at nonzero recoil. We report our preliminary result for the form factor ratio at the corresponding momentum transfer of the two decays f0 (s)(Mπ 2)/f0 (d)(MK 2 ).
AB - We present a (2+1)-flavor lattice QCD calculation of the form factor ratio between the semileptonic decays B¯0 s → D+ s l−ν¯ and B¯0 → D+l−ν¯. This ratio is an important theoretical input to the hadronic determination of the Bmeson fragmentation fraction ratio fs/fd which enters in the measurement of BR(B0 s → µ+µ−). Small lattice spacings and high statistics enable us to simulate the decays with a dynamic final D meson of small momentum and reliably extract the hadronic matrix elements at nonzero recoil. We report our preliminary result for the form factor ratio at the corresponding momentum transfer of the two decays f0 (s)(Mπ 2)/f0 (d)(MK 2 ).
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M3 - Conference Article
AN - SCOPUS:85053289411
SN - 1824-8039
VL - 139
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 29th International Symposium on Lattice Field Theory, Lattice 2011
Y2 - 10 July 2011 through 16 July 2011
ER -