|Vub| from exclusive semileptonic B→π decays


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).

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Description/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].

Item Type: Article
ISSNs: 0370-2693 (print)
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 57250
Date Deposited: 14 Aug 2008
Last Modified: 27 Mar 2014 18:39
URI: http://eprints.soton.ac.uk/id/eprint/57250

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