TY - JOUR
T1 - B-meson semileptonic form factors on (2+1+1)-flavor HISQ ensembles
AU - Fermilab Lattice and MILC Collaborations
AU - Gelzer, Z.
AU - DeTar, C.
AU - El-Khadra, A. X.
AU - Gámiz, E.
AU - Gottlieb, Steven
AU - Kronfeld, Andreas S.
AU - Liu, Yuzhi
AU - Meurice, Y.
AU - Simone, J. N.
AU - Toussaint, D.
AU - van de Water, R. S.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2019
Y1 - 2019
N2 - We report updates to an ongoing lattice-QCD calculation of the form factors for the semileptonic decays B → π`ν, Bs → K`ν, B → π`+`−, and B → K`+`−. The tree-level decays B(s) → π(K)`ν enable precise determinations of the CKM matrix element |Vub|, while the flavor-changing neutral-current interactions B → π(K)`+`− are sensitive to contributions from new physics. This work uses MILC's (2+1+1)-flavor HISQ ensembles at approximate lattice spacings between 0.057 and 0.15 fm, with physical sea-quark masses on four out of the seven ensembles. The valence sector is comprised of a clover b quark (in the Fermilab interpretation) and HISQ light and s quarks. We present preliminary results for the form factors f0, f+, and fT, including studies of systematic errors.
AB - We report updates to an ongoing lattice-QCD calculation of the form factors for the semileptonic decays B → π`ν, Bs → K`ν, B → π`+`−, and B → K`+`−. The tree-level decays B(s) → π(K)`ν enable precise determinations of the CKM matrix element |Vub|, while the flavor-changing neutral-current interactions B → π(K)`+`− are sensitive to contributions from new physics. This work uses MILC's (2+1+1)-flavor HISQ ensembles at approximate lattice spacings between 0.057 and 0.15 fm, with physical sea-quark masses on four out of the seven ensembles. The valence sector is comprised of a clover b quark (in the Fermilab interpretation) and HISQ light and s quarks. We present preliminary results for the form factors f0, f+, and fT, including studies of systematic errors.
UR - https://www.scopus.com/pages/publications/85099589602
UR - https://www.scopus.com/inward/citedby.url?scp=85099589602&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85099589602
SN - 1824-8039
VL - 363
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 236
T2 - 37th International Symposium on Lattice Field Theory, LATTICE 2019
Y2 - 16 June 2019 through 22 June 2019
ER -