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Extracting I Vub I From Omnes dispersion relations and lattice QCD

Extracting I Vub I From Omnes dispersion relations and lattice QCD
Extracting I Vub I From Omnes dispersion relations and lattice QCD
To make the determination of jVubj from exclusive semileptonic B !p decays competitive with that from inclusive decays requires a means of using directly calculated and/or measured form-factor values to constrain the overall q2 shape of the form factors, f + (and f 0). Integrated or partially integrated decay-rates can then be compared to experiment to allow the extraction of jVubj. Dispersion approaches offer a model-independent way to accomplish this task. Dispersive bounds have been applied to B!p decays [1, 2, 3, 4, 5, 6] with recent work [6] combining a constraint on jVubj f +(0) from factorisation/SCET with lattice QCD inputs at high q2 and a ChPT result at q2 max = (mB
202-[5pp]
Proceedings of Science
Flynn, Jonathan
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe
Flynn, Jonathan
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe

Flynn, Jonathan and Nieves, Juan (2006) Extracting I Vub I From Omnes dispersion relations and lattice QCD. In Proceedings of Science (PoS) LAT2005. Proceedings of Science. 202-[5pp] .

Record type: Conference or Workshop Item (Paper)

Abstract

To make the determination of jVubj from exclusive semileptonic B !p decays competitive with that from inclusive decays requires a means of using directly calculated and/or measured form-factor values to constrain the overall q2 shape of the form factors, f + (and f 0). Integrated or partially integrated decay-rates can then be compared to experiment to allow the extraction of jVubj. Dispersion approaches offer a model-independent way to accomplish this task. Dispersive bounds have been applied to B!p decays [1, 2, 3, 4, 5, 6] with recent work [6] combining a constraint on jVubj f +(0) from factorisation/SCET with lattice QCD inputs at high q2 and a ChPT result at q2 max = (mB

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More information

Published date: July 2006
Venue - Dates: XXIIIrd International Symposium on Lattice Field Theory, 2005-07-25 - 2005-07-30

Identifiers

Local EPrints ID: 57240
URI: https://eprints.soton.ac.uk/id/eprint/57240
PURE UUID: 81d4d1be-99e0-4ca1-bb0c-b031f8cee4aa
ORCID for Jonathan Flynn: ORCID iD orcid.org/0000-0002-6280-1677

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 14 Mar 2019 01:53

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