B→πℓv and B→;ℓ+;ℓ- Semilept

Daping Du; Jon A. Bailey; A. Bazavov; C. Bernard; A. X. El-Khadra; Steven Gottlieb; R. D. Jain; A. S. Kronfeld; J. Laiho; Yuzhi Liu; P. B. Mackenzie; Y. Meurice; R. S. Van De Water; Ran Zhou

B→πℓv and B→;ℓ+;ℓ- Semilept

Daping Du, Jon A. Bailey, A. Bazavov, C. Bernard, A. X. El-Khadra, Steven Gottlieb, R. D. Jain, A. S. Kronfeld, J. Laiho, Yuzhi Liu, P. B. Mackenzie, Y. Meurice, R. S. Van De Water, Ran Zhou

Integrated Sciences and Engineering Division

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

We update the lattice calculation of the B→π semileptonic form factors, which have important applications to the CKM matrix element jV_ubj and the B →π ℓ⁺ℓ^- rare decay. We use MILC asqtad ensembles with N_f = 2+1 sea quarks and over a range of lattice spacings a ≈ 0:045- 0:12 fm. We perform a combined chiral and continuum extrapolation of our lattice data using SU(2) staggered chiral perturbation theory in the hard pion limit. To extend the results for the form factors to the full kinematic range, we take a functional approach to parameterize the form factors using the Bourrely-Caprini-Lellouch formalism in a model-independent way. Our analysis is still blinded with an unknown off-set factor which will be disclosed when we present the final results.

Original language	English
Article number	383
Journal	Proceedings of Science
Volume	29-July-2013
Publication status	Published - 2013
Event	31st International Symposium on Lattice Field Theory, LATTICE 2013 - Mainz, Germany Duration: 2013 Jul 29 → 2013 Aug 3

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Cite this

@article{35c440807cb0447497ea43ffb57ac535,

title = "B→πℓv and B→;ℓ+;ℓ- Semilept",

abstract = "We update the lattice calculation of the B→π semileptonic form factors, which have important applications to the CKM matrix element jVubj and the B →π ℓ+ℓ- rare decay. We use MILC asqtad ensembles with Nf = 2+1 sea quarks and over a range of lattice spacings a ≈ 0:045- 0:12 fm. We perform a combined chiral and continuum extrapolation of our lattice data using SU(2) staggered chiral perturbation theory in the hard pion limit. To extend the results for the form factors to the full kinematic range, we take a functional approach to parameterize the form factors using the Bourrely-Caprini-Lellouch formalism in a model-independent way. Our analysis is still blinded with an unknown off-set factor which will be disclosed when we present the final results.",

author = "Daping Du and Bailey, {Jon A.} and A. Bazavov and C. Bernard and El-Khadra, {A. X.} and Steven Gottlieb and Jain, {R. D.} and Kronfeld, {A. S.} and J. Laiho and Yuzhi Liu and Mackenzie, {P. B.} and Y. Meurice and {Van De Water}, {R. S.} and Ran Zhou",

year = "2013",

language = "English",

volume = "29-July-2013",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

note = "31st International Symposium on Lattice Field Theory, LATTICE 2013 ; Conference date: 29-07-2013 Through 03-08-2013",

}

TY - JOUR

T1 - B→πℓv and B→;ℓ+;ℓ- Semilept

AU - Du, Daping

AU - Bailey, Jon A.

AU - Bazavov, A.

AU - Bernard, C.

AU - El-Khadra, A. X.

AU - Gottlieb, Steven

AU - Jain, R. D.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Liu, Yuzhi

AU - Mackenzie, P. B.

AU - Meurice, Y.

AU - Van De Water, R. S.

AU - Zhou, Ran

PY - 2013

Y1 - 2013

N2 - We update the lattice calculation of the B→π semileptonic form factors, which have important applications to the CKM matrix element jVubj and the B →π ℓ+ℓ- rare decay. We use MILC asqtad ensembles with Nf = 2+1 sea quarks and over a range of lattice spacings a ≈ 0:045- 0:12 fm. We perform a combined chiral and continuum extrapolation of our lattice data using SU(2) staggered chiral perturbation theory in the hard pion limit. To extend the results for the form factors to the full kinematic range, we take a functional approach to parameterize the form factors using the Bourrely-Caprini-Lellouch formalism in a model-independent way. Our analysis is still blinded with an unknown off-set factor which will be disclosed when we present the final results.

AB - We update the lattice calculation of the B→π semileptonic form factors, which have important applications to the CKM matrix element jVubj and the B →π ℓ+ℓ- rare decay. We use MILC asqtad ensembles with Nf = 2+1 sea quarks and over a range of lattice spacings a ≈ 0:045- 0:12 fm. We perform a combined chiral and continuum extrapolation of our lattice data using SU(2) staggered chiral perturbation theory in the hard pion limit. To extend the results for the form factors to the full kinematic range, we take a functional approach to parameterize the form factors using the Bourrely-Caprini-Lellouch formalism in a model-independent way. Our analysis is still blinded with an unknown off-set factor which will be disclosed when we present the final results.

UR - http://www.scopus.com/inward/record.url?scp=84976288768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84976288768&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84976288768

SN - 1824-8039

VL - 29-July-2013

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 383

T2 - 31st International Symposium on Lattice Field Theory, LATTICE 2013

Y2 - 29 July 2013 through 3 August 2013

ER -

B→πℓv and B→;ℓ+;ℓ- Semilept

Abstract

All Science Journal Classification (ASJC) codes

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