HQET form factors for Bs → Klv decays beyond leading order
HQET form factors for Bs → Klv decays beyond leading order
We compute semi-leptonic Bs decay form factors using Heavy Quark Effective Theory on the lattice. To obtain good control of the 1 /mb expansion, one has to take into account not only the leading static order but also the terms arising at O (1/mb): kinetic, spin and current insertions. We show results for these terms calculated through the ratio method, using our prior results for the static order. After combining them with non-perturbative HQET parameters they can be continuum-extrapolated to give the QCD form factor correct up to O (1/) corrections and without O (αs(mb)n) corrections.
Banerjee, Debasish
dcc5d706-d0ed-40b7-94f6-a4ddd7d41646
Koren, Mateusz
84f8ee4e-3aaf-4fd1-aed0-6c9e53f49dab
Simma, Hubert
1081030b-d555-4860-8fc8-c97c1979e2fb
Sommer, Rainer
1b793a87-4321-4602-b30c-d5157c4d02a2
26 March 2018
Banerjee, Debasish
dcc5d706-d0ed-40b7-94f6-a4ddd7d41646
Koren, Mateusz
84f8ee4e-3aaf-4fd1-aed0-6c9e53f49dab
Simma, Hubert
1081030b-d555-4860-8fc8-c97c1979e2fb
Sommer, Rainer
1b793a87-4321-4602-b30c-d5157c4d02a2
Banerjee, Debasish, Koren, Mateusz, Simma, Hubert and Sommer, Rainer
(2018)
HQET form factors for Bs → Klv decays beyond leading order.
In EPJ Web Conf.
EPJ Web of Conferences..
(doi:10.1051/epjconf/201817513025).
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Conference or Workshop Item
(Paper)
Abstract
We compute semi-leptonic Bs decay form factors using Heavy Quark Effective Theory on the lattice. To obtain good control of the 1 /mb expansion, one has to take into account not only the leading static order but also the terms arising at O (1/mb): kinetic, spin and current insertions. We show results for these terms calculated through the ratio method, using our prior results for the static order. After combining them with non-perturbative HQET parameters they can be continuum-extrapolated to give the QCD form factor correct up to O (1/) corrections and without O (αs(mb)n) corrections.
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Published date: 26 March 2018
Venue - Dates:
35th International Symposium on Lattice Field Theory, , Granada, Spain, 2017-06-18 - 2017-06-24
Identifiers
Local EPrints ID: 500724
URI: http://eprints.soton.ac.uk/id/eprint/500724
PURE UUID: 149a0dcf-3dce-4adb-a177-da964955f86c
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Date deposited: 12 May 2025 16:37
Last modified: 13 May 2025 02:12
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Contributors
Author:
Debasish Banerjee
Author:
Mateusz Koren
Author:
Hubert Simma
Author:
Rainer Sommer
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