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|Vub| from exclusive semileptonic B → π decays

|Vub| from exclusive semileptonic B → π decays
|Vub| from exclusive semileptonic B → π decays
We use Omnès representations of the form factors f+ and f0 for exclusive semileptonic B → π decays, paying special attention to the treatment of the B* pole and its effect on f+. We apply them to combine experimental partial branching fraction information with theoretical calculations of both form factors to extract |Vub|. The precision we achieve is competitive with the inclusive determination and we do not find a significant discrepancy between our result, |Vub|=(3.90 ± 0.32 ± 0.18) × 10-3, and the inclusive world average value, (4.45 ± 0.20 ±0.26) × 10-3 [Heavy Flavor Averaging Group (HFAG), hep-ex/0603003].
0370-2693
269-274
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe

Flynn, Jonathan M. and Nieves, Juan (2007) |Vub| from exclusive semileptonic B → π decays. Physics Letters B, 649 (4), 269-274. (doi:10.1016/j.physletb.2007.04.028).

Record type: Article

Abstract

We use Omnès representations of the form factors f+ and f0 for exclusive semileptonic B → π decays, paying special attention to the treatment of the B* pole and its effect on f+. We apply them to combine experimental partial branching fraction information with theoretical calculations of both form factors to extract |Vub|. The precision we achieve is competitive with the inclusive determination and we do not find a significant discrepancy between our result, |Vub|=(3.90 ± 0.32 ± 0.18) × 10-3, and the inclusive world average value, (4.45 ± 0.20 ±0.26) × 10-3 [Heavy Flavor Averaging Group (HFAG), hep-ex/0603003].

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More information

Published date: 7 June 2007

Identifiers

Local EPrints ID: 57250
URI: https://eprints.soton.ac.uk/id/eprint/57250
ISSN: 0370-2693
PURE UUID: 18be9563-d442-4498-b099-50d5648fb042
ORCID for Jonathan M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 20 Jul 2019 01:21

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