Semileptonic $$B$$-Meson Decays to Light Pseudoscalar Mesons on the HISQ Ensembles

Conference · Wed Oct 25 00:00:00 EDT 2017

OSTI ID:1423242

Gelzer, Zechariah ^[1]; Bernard, C. ^[2]; DeTar, C. ^[3]; El-Khadra, A. X. ^[4]; Gámiz, E. ^[5]; Gottlieb, Steven ^[6]; Kronfeld, Andreas S. ^[7]; Liu, Yuzhi ^[6]; Meurice, Y. ^[1]; Simone, J. N. ^[4]; Toussaint, D. ^[8]; Van de Water, R. S. ^[4]; Zhou, R. ^[4]

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1. Iowa U.
2. Washington U., St. Louis
3. Utah U.
4. Fermilab
5. Granada U., Theor. Phys. Astrophys.
6. Indiana U.
7. TUM-IAS, Munich
8. Arizona U.

We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of $$B$$ mesons with both charged currents ($$B\to\pi\ell\nu$$, $$B_s\to K\ell\nu$$) and neutral currents ($$B\to\pi\ell^+\ell^-$$, $$B\to K\ell^+\ell^-$$). The results are important for constraining or revealing physics beyond the Standard Model. This work uses MILC's (2+1+1)-flavor ensembles with the HISQ action for the sea and light valence quarks and the clover action in the Fermilab interpretation for the $$b$$ quark. Simulations are carried out at three lattice spacings down to $0.088$ fm, with both physical and unphysical sea-quark masses. We present preliminary results for correlation-function fits.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1423242
• Report Number(s): arXiv:1710.09442; FERMILAB-CONF-17-484-T; 1632762
• Resource Relation: Conference: 35th International Symposium on Lattice Field Theory, Granada, Spain, 06/18-06/24/2017
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS