B<inf>c</inf> decays from highly improved staggered quarks and NRQCD

B Colquhoun; C Davies; J Koponen; A Lytle; C McNeile

B<inf>c</inf> decays from highly improved staggered quarks and NRQCD

B Colquhoun, C Davies, J Koponen, A Lytle, C McNeile

School of Engineering, Computing and Mathematics

Research output: Contribution to journal › Conference proceedings published in a journal › peer-review

Abstract

We calculate semileptonic form factors for the decays Bc→ηc lν and Bcrarr;J/ψ lν over the entire q2 range, using a highly improved lattice quark action for charm at several lattice spacings down to a = 0:045 fm. We have two ways of treating the b quark: either with an O(αs) improved NRQCD formalism or by extrapolating a heavy mass mh to mb in the relativistic formalism. Comparison of the two approaches provides an important cross-check of methodologies in lattice QCD. Nonperturbative renormalisation of the currents in the relativistic theory also allows us then to fix NRQCD-charm normalisation for b to c decays such as B→D and B→D∗.

Original language	English
Number of pages	0
Journal	Proceedings of Science
Volume	0
Issue number	0
Publication status	Published - 1 Jan 2016

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title = "Bc decays from highly improved staggered quarks and NRQCD",

abstract = "We calculate semileptonic form factors for the decays Bc→ηc lν and Bcrarr;J/ψ lν over the entire q2 range, using a highly improved lattice quark action for charm at several lattice spacings down to a = 0:045 fm. We have two ways of treating the b quark: either with an O(αs) improved NRQCD formalism or by extrapolating a heavy mass mh to mb in the relativistic formalism. Comparison of the two approaches provides an important cross-check of methodologies in lattice QCD. Nonperturbative renormalisation of the currents in the relativistic theory also allows us then to fix NRQCD-charm normalisation for b to c decays such as B→D and B→D∗.",

author = "B Colquhoun and C Davies and J Koponen and A Lytle and C McNeile",

year = "2016",

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language = "English",

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T1 - Bc decays from highly improved staggered quarks and NRQCD

AU - Colquhoun, B

AU - Davies, C

AU - Koponen, J

AU - Lytle, A

AU - McNeile, C

PY - 2016/1/1

Y1 - 2016/1/1

N2 - We calculate semileptonic form factors for the decays Bc→ηc lν and Bcrarr;J/ψ lν over the entire q2 range, using a highly improved lattice quark action for charm at several lattice spacings down to a = 0:045 fm. We have two ways of treating the b quark: either with an O(αs) improved NRQCD formalism or by extrapolating a heavy mass mh to mb in the relativistic formalism. Comparison of the two approaches provides an important cross-check of methodologies in lattice QCD. Nonperturbative renormalisation of the currents in the relativistic theory also allows us then to fix NRQCD-charm normalisation for b to c decays such as B→D and B→D∗.

AB - We calculate semileptonic form factors for the decays Bc→ηc lν and Bcrarr;J/ψ lν over the entire q2 range, using a highly improved lattice quark action for charm at several lattice spacings down to a = 0:045 fm. We have two ways of treating the b quark: either with an O(αs) improved NRQCD formalism or by extrapolating a heavy mass mh to mb in the relativistic formalism. Comparison of the two approaches provides an important cross-check of methodologies in lattice QCD. Nonperturbative renormalisation of the currents in the relativistic theory also allows us then to fix NRQCD-charm normalisation for b to c decays such as B→D and B→D∗.

M3 - Conference proceedings published in a journal

SN - 1824-8039

VL - 0

JO - Proceedings of Science

JF - Proceedings of Science

IS - 0

ER -

B<inf>c</inf> decays from highly improved staggered quarks and NRQCD

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