Determining the Efficacy of Different Parameterizations of the z-expansion

Erik Gustafson; Yannick Meurice

doi:10.22323/1.334.0291

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Determining the Efficacy of Different Parameterizations of the z-expansion

Conference proceeding

Open access

Determining the Efficacy of Different Parameterizations of the z-expansion

Erik Gustafson and Yannick Meurice

The 36th Annual International Symposium on Lattice Field Theory - LATTICE2018 22-28 July, 2018 Michigan State University, East Lansing, Michigan, USA

Proceedings of Science, v. 334

07/26/2018

DOI: 10.22323/1.334.0291

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Abstract

We develop a methodology to test the accuracy of lattice extrapolations of the form factors in B decays only using experimental data. We test this methodology by comparing the BGL parameterization proposed by Boyd, Grinstein, and Lebed and the BCL parameterization proposed by Bourrely, Caprini, and Lellouch in the context of B→πℓν . Our results suggest that the BCL parameterization is a slightly better predictor of the low q2 region than the BGL parameterization and that this methodology can be extended to other decays such as B→Dℓν .

Form factors

Methodology

Parameterization

Test procedures

Details

Title: Subtitle: Determining the Efficacy of Different Parameterizations of the z-expansion
Creators: Erik Gustafson
Yannick Meurice
Resource Type: Conference proceeding
Publication Details: The 36th Annual International Symposium on Lattice Field Theory - LATTICE2018 22-28 July, 2018 Michigan State University, East Lansing, Michigan, USA
Series: Proceedings of Science; v. 334
DOI: 10.22323/1.334.0291
eISSN: 2331-8422
Language: English
Date published: 07/26/2018
Academic Unit: Physics and Astronomy
Record Identifier: 9984428783602771

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