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Form factors for semi-leptonic B decays

Form factors for semi-leptonic B decays
Form factors for semi-leptonic B decays
Semi-leptonic $B$ decays provide promising channels to test the Standard Model, search for signs of new physics, or determine fundamental parameters like CKM matrix elements. We present an update on our calculation of short distance contributions to GIM suppressed rare $B$ decays focusing in particular on $B_s\to \phi \ell^+ \ell^-$ decays. Furthermore we show first results for our calculation of $B_{(s)}\to D_{(s)}^{(*)}\ell\nu$ semi-leptonic decays involving $b\to c$ transitions. Our calculations are based on RBC-UKQCD's 2+1 flavor domain-wall fermion and Iwasaki gauge field configurations featuring three lattice spacings in the range $1.73$ GeV $\le a^{-1} \le 2.77$ GeV and pion masses down to the physical value. We calculate the form factors by simulating $b$-quarks using the relativistic heavy quark action, create light $u/d$ and $s$ quarks with standard domain-wall kernel, and use optimised M\"obius domain-wall fermions for charm quarks.
hep-lat
1824-8039
Flynn, Jonathan
d8e90963-ba56-415c-bbd4-496b7d91d343
Izubuchi, Taku
777b2caf-5063-400b-8f28-864e57938e54
Juttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Kawanai, Taichi
d14cf626-23e4-44e1-83c6-b6de622fe889
Lehner, Christoph
ca2f6986-c2ac-47b4-87fb-ac9351447244
Lizarazo, Edwin
93c4d9cb-f709-4e54-b949-9870d1137d48
Soni, Amarjit
1d4d3e39-9bc6-4861-8ced-fca957e79dfa
Tsang, Justus Tobias
e4648385-cecf-4c02-b13e-c06312f16b12
Witzel, Oliver
ceb5d2c8-8f0a-46f4-977e-7d45c6b06b82
Flynn, Jonathan
d8e90963-ba56-415c-bbd4-496b7d91d343
Izubuchi, Taku
777b2caf-5063-400b-8f28-864e57938e54
Juttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Kawanai, Taichi
d14cf626-23e4-44e1-83c6-b6de622fe889
Lehner, Christoph
ca2f6986-c2ac-47b4-87fb-ac9351447244
Lizarazo, Edwin
93c4d9cb-f709-4e54-b949-9870d1137d48
Soni, Amarjit
1d4d3e39-9bc6-4861-8ced-fca957e79dfa
Tsang, Justus Tobias
e4648385-cecf-4c02-b13e-c06312f16b12
Witzel, Oliver
ceb5d2c8-8f0a-46f4-977e-7d45c6b06b82

Flynn, Jonathan, Izubuchi, Taku, Juttner, Andreas, Kawanai, Taichi, Lehner, Christoph, Lizarazo, Edwin, Soni, Amarjit, Tsang, Justus Tobias and Witzel, Oliver (2016) Form factors for semi-leptonic B decays. Proceedings of Science, LATTICE2016, [296].

Record type: Article

Abstract

Semi-leptonic $B$ decays provide promising channels to test the Standard Model, search for signs of new physics, or determine fundamental parameters like CKM matrix elements. We present an update on our calculation of short distance contributions to GIM suppressed rare $B$ decays focusing in particular on $B_s\to \phi \ell^+ \ell^-$ decays. Furthermore we show first results for our calculation of $B_{(s)}\to D_{(s)}^{(*)}\ell\nu$ semi-leptonic decays involving $b\to c$ transitions. Our calculations are based on RBC-UKQCD's 2+1 flavor domain-wall fermion and Iwasaki gauge field configurations featuring three lattice spacings in the range $1.73$ GeV $\le a^{-1} \le 2.77$ GeV and pion masses down to the physical value. We calculate the form factors by simulating $b$-quarks using the relativistic heavy quark action, create light $u/d$ and $s$ quarks with standard domain-wall kernel, and use optimised M\"obius domain-wall fermions for charm quarks.

Full text not available from this repository.

More information

Published date: 15 December 2016
Additional Information: 13 pages, 2 tables, 6 figures, presented at the 34th annual International Symposium on Lattice Field Theory (Lattice2016), 24-30 July 2016, University of Southampton, UK
Keywords: hep-lat

Identifiers

Local EPrints ID: 431565
URI: http://eprints.soton.ac.uk/id/eprint/431565
ISSN: 1824-8039
PURE UUID: 8d2e70d8-33cf-4d77-b127-6175c90bffda
ORCID for Jonathan Flynn: ORCID iD orcid.org/0000-0002-6280-1677
ORCID for Andreas Juttner: ORCID iD orcid.org/0000-0002-3978-0927
ORCID for Edwin Lizarazo: ORCID iD orcid.org/0000-0001-7865-8951

Catalogue record

Date deposited: 07 Jun 2019 16:30
Last modified: 11 Mar 2021 02:40

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Contributors

Author: Jonathan Flynn ORCID iD
Author: Taku Izubuchi
Author: Andreas Juttner ORCID iD
Author: Taichi Kawanai
Author: Christoph Lehner
Author: Edwin Lizarazo ORCID iD
Author: Amarjit Soni
Author: Justus Tobias Tsang
Author: Oliver Witzel

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