B s → K ℓ ν decay from lattice QCD

Bazavov, A.; Bernard, C.; DeTar, C.; Du, Daping; El-Khadra, A. X.; Freeland, E. D.; Gámiz, E.; Gelzer, Z.; Gottlieb, Steven; Heller, U. M.; Kronfeld, A. S.; Laiho, J.; Liu, Yuzhi; Mackenzie, P. B.; Meurice, Y.; Neil, E. T.; Simone, J. N.; Sugar, R.; Toussaint, D.; Van de Water, R. S.; Zhou, Ran

doi:10.1103/PhysRevD.100.034501

Title: $B_{s} \to K ℓ ν$ decay from lattice QCD

Abstract

We use lattice QCD to calculate the form factors f+(q²) and f₀(q²) for the semileptonic decay Bs→Kℓν. Our calculation uses six MILC asqtad 2+1 flavor gauge-field ensembles with three lattice spacings. At the smallest and largest lattice spacing the light-quark sea mass is set to 1/10 the strange-quark mass. At the intermediate lattice spacing, we use four values for the light-quark sea mass ranging from 1/5 to 1/20 of the strange-quark mass. We use the asqtad improved staggered action for the light valence quarks, and the clover action with the Fermilab interpolation for the heavy valence bottom quark. We use SU(2) hard-kaon heavy-meson rooted staggered chiral perturbation theory to take the chiral-continuum limit. A functional z expansion is used to extend the form factors to the full kinematic range. We present predictions for the differential decay rate for both Bs→Kμν and Bs→Kτν. We also present results for the forward-backward asymmetry, the lepton polarization asymmetry, ratios of the scalar and vector form factors for the decays Bs→Kℓν and Bs→Dsℓν. Our results, together with future experimental measurements, can be used to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |$$V_{ub}$$|.

Publication Date:: Thu Aug 01 00:00:00 EDT 2019

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Univ. of Colorado, Boulder, CO (United States); Syracuse Univ., NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: Fermilab Lattice and MILC Collaborations

OSTI Identifier:: 1546825

Alternate Identifier(s):: OSTI ID: 1527437; OSTI ID: 1764431; OSTI ID: 1834561; OSTI ID: 1903111

Report Number(s):: arXiv:1901.02561; FERMILAB-PUB-19-005-T
Journal ID: ISSN 2470-0010; PRVDAQ; 034501

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357; FG02-91ER40628; FC02-12ER41879; FG02-13ER42001; SC0015655; SC0010120; FG02-91ER40661; SC0010113; SC0010005; FG02-13ER41976; SC0012704; AC02-07CH11359; CNS-0421498; CNS-0420873; CNS-0420985; 12-S-15; SC0009998

Resource Type:: Published Article

Journal Name:: Physical Review. D.

Additional Journal Information:: Journal Name: Physical Review. D. Journal Volume: 100 Journal Issue: 3; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Lattice QCD; Leptonic, semileptonic & radiative decays

Citation Formats


                    Bazavov, A., Bernard, C., DeTar, C., Du, Daping, El-Khadra, A. X., Freeland, E. D., Gámiz, E., Gelzer, Z., Gottlieb, Steven, Heller, U. M., Kronfeld, A. S., Laiho, J., Liu, Yuzhi, Mackenzie, P. B., Meurice, Y., Neil, E. T., Simone, J. N., Sugar, R., Toussaint, D., Van de Water, R. S., Zhou, Ran, and Fermilab Lattice and MILC Collaborations. B s → K ℓ ν decay from lattice QCD.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.100.034501.

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                    Bazavov, A., Bernard, C., DeTar, C., Du, Daping, El-Khadra, A. X., Freeland, E. D., Gámiz, E., Gelzer, Z., Gottlieb, Steven, Heller, U. M., Kronfeld, A. S., Laiho, J., Liu, Yuzhi, Mackenzie, P. B., Meurice, Y., Neil, E. T., Simone, J. N., Sugar, R., Toussaint, D., Van de Water, R. S., Zhou, Ran, & Fermilab Lattice and MILC Collaborations. B s → K ℓ ν decay from lattice QCD.  United States.  https://doi.org/10.1103/PhysRevD.100.034501

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                    Bazavov, A., Bernard, C., DeTar, C., Du, Daping, El-Khadra, A. X., Freeland, E. D., Gámiz, E., Gelzer, Z., Gottlieb, Steven, Heller, U. M., Kronfeld, A. S., Laiho, J., Liu, Yuzhi, Mackenzie, P. B., Meurice, Y., Neil, E. T., Simone, J. N., Sugar, R., Toussaint, D., Van de Water, R. S., Zhou, Ran, and Fermilab Lattice and MILC Collaborations. Thu .  
"B s → K ℓ ν decay from lattice QCD".  United States.  https://doi.org/10.1103/PhysRevD.100.034501.

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@article{osti_1546825,

  title        = {B s → K ℓ ν decay from lattice QCD},

  author       = {Bazavov, A. and Bernard, C. and DeTar, C. and Du, Daping and El-Khadra, A. X. and Freeland, E. D. and Gámiz, E. and Gelzer, Z. and Gottlieb, Steven and Heller, U. M. and Kronfeld, A. S. and Laiho, J. and Liu, Yuzhi and Mackenzie, P. B. and Meurice, Y. and Neil, E. T. and Simone, J. N. and Sugar, R. and Toussaint, D. and Van de Water, R. S. and Zhou, Ran and Fermilab Lattice and MILC Collaborations},

  abstractNote = {We use lattice QCD to calculate the form factors f+(q2) and f0(q2) for the semileptonic decay Bs→Kℓν. Our calculation uses six MILC asqtad 2+1 flavor gauge-field ensembles with three lattice spacings. At the smallest and largest lattice spacing the light-quark sea mass is set to 1/10 the strange-quark mass. At the intermediate lattice spacing, we use four values for the light-quark sea mass ranging from 1/5 to 1/20 of the strange-quark mass. We use the asqtad improved staggered action for the light valence quarks, and the clover action with the Fermilab interpolation for the heavy valence bottom quark. We use SU(2) hard-kaon heavy-meson rooted staggered chiral perturbation theory to take the chiral-continuum limit. A functional z expansion is used to extend the form factors to the full kinematic range. We present predictions for the differential decay rate for both Bs→Kμν and Bs→Kτν. We also present results for the forward-backward asymmetry, the lepton polarization asymmetry, ratios of the scalar and vector form factors for the decays Bs→Kℓν and Bs→Dsℓν. Our results, together with future experimental measurements, can be used to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |$V_{ub}$|.},

  doi          = {10.1103/PhysRevD.100.034501},

  journal      = {Physical Review. D.},

  number       = 3,

  volume       = 100,

  place        = {United States},

  year         = {Thu Aug 01 00:00:00 EDT 2019},

  month        = {Thu Aug 01 00:00:00 EDT 2019}

}

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DOI: 10.1103/PhysRevD.93.113016

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DOI: 10.1103/PhysRevD.92.034506

Heavy-meson semileptonic decays for the Standard Model and beyond
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Scaling tests of the improved Kogut-Susskind quark action
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Physical Review D, Vol. 61, Issue 11
DOI: 10.1103/PhysRevD.61.111502

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Title: B s → K ℓ ν decay from lattice QCD

Abstract

Citation Formats

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Title: $B_{s} \to K ℓ ν$ decay from lattice QCD

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journal, June 2016

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journal, May 2016

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journal, October 2013

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journal, November 2010

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journal, October 2007

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journal, April 2015

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journal, July 2000

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journal, September 2014

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journal, February 1999

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journal, June 2014

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journal, December 1998

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journal, August 2013

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journal, August 2018

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journal, December 2018

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journal, September 2014

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journal, July 1999

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journal, January 2006

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journal, June 2012

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journal, August 2001

Light hadrons with improved staggered quarks: Approaching the continuum limit
journal, November 2004

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journal, September 1985

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journal, June 2012

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journal, June 1995

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journal, May 2013

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conference, April 2014

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journal, January 2009

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journal, July 2015

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journal, August 2017

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journal, November 1980

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journal, March 2014

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journal, February 2016

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journal, January 2005

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