Jul 24 – 30, 2016
Highfield Campus, University of Southampton
Europe/London timezone

Form factors in the $B_s --> K l \nu$ decays using HQET and the lattice

Jul 29, 2016, 5:50 PM
Building 67 Room 1003 (Highfield Campus, University of Southampton)

Building 67 Room 1003

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Weak Decays and Matrix Elements Weak Decays and Matrix Elements


Dr Debasish Banerjee (NIC, DESY)


We report on a recent computation of the form factors in semi-leptonic decays of the $B_s$ using Heavy Quark Effective Theory (HQET) formalism applied on the lattice. The connection of the form factors with the 2-point and 3-point correlators on the lattice is explained, and the subsequent non-perturbative renormalization of HQET and it's matching to $N_f=2$ QCD is outlined. The results of the (static) leading-order calculation in the continuum limit is presented. Preliminary results on extending the leading-order computation by including the $1/m$ effects (where m is the heavy-quark mass) are mentioned.

Primary author

Dr Debasish Banerjee (NIC, DESY)


Dr Anosh Joseph (DAMTP, University of Cambridge) Dr Fabio Bernadoni (TU Dresden) Dr Felix Tobias Bahr (NIC DESY) Dr Hubert Simma (NIC DESY) Dr Mateusz Koren (NIC, DESY) Prof. Rainer Sommer (NIC, DESY)

Presentation materials