Form factor ratios for B s → K ℓ ν and B s → D s ℓ ν semileptonic decays and | V u b / V c b |

Monahan, Christopher J.; Bouchard, Chris M.; Lepage, G. Peter; Na, Heechang; Shigemitsu, Junko

doi:10.1103/PhysRevD.98.114509

Title: Form factor ratios for $B_{s} \to K ℓ ν$ and $B_{s} \to D_{s} ℓ ν$ semileptonic decays and $| V_{u b} / V_{c b} |$

Journal Article · Wed Dec 19 00:00:00 EST 2018 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.98.114509· OSTI ID:1488365

Monahan, Christopher J.; Bouchard, Chris M.; Lepage, G. Peter; Na, Heechang; Shigemitsu, Junko

We present a lattice quantum chromodynamics determination of the ratio of the scalar and vector form factors for two semileptonic decays of the B s meson: $$B_s$$ → $Kℓν$ and $$B_s$$ → $$D_sℓν$$. In conjunction with future experimental data, our results for these correlated form factors will provide a new method to extract $$|V_{ub}/V_{cb}|$$, which may elucidate the current tension between exclusive and inclusive determinations of these Cabibbo-Kobayashi-Maskawa mixing matrix parameters. In addition to the form factor results, we determine the ratio of the differential decay rates, and forward-backward and polarization asymmetries, for the two decays.

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Research Organization:: Univ. of Washington, Seattle, WA (United States); The Ohio State Univ., Columbus, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: HPQCD Collaboration

Grant/Contract Number:: FG02-00ER41132; SC0011726

OSTI ID:: 1488365

Alternate ID(s):: OSTI ID: 1609330

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Vol. 98 Journal Issue: 11; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Measurements of branching fractions and <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math> distributions for <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mi>ℓ</mml:mi><mml:mi>ν</mml:mi></mml:math> and <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>ρ</mml:mi><mml:mi>ℓ</mml:mi><mml:mi>ν</mml:mi></mml:math> decays with <mml:math altimg="si4.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>∗</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:mi>ℓ</mml:mi><mml:mi>ν</mml:mi></mml:math> decay tagging Hokuue, T.; Abe, K.; Abe, K. Physics Letters B, Vol. 648, Issue 2-3 https://doi.org/10.1016/j.physletb.2007.02.067	journal	May 2007
$Λ_{b} \to p ℓ^{-} {\bar{ν}}_{ℓ}$ and $Λ_{b} \to Λ_{c} ℓ^{-} {\bar{ν}}_{ℓ}$ form factors from lattice QCD with relativistic heavy quarks Detmold, William; Lehner, Christoph; Meinel, Stefan Physical Review D, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevD.92.034503	journal	August 2015
$B \to D ℓ ν$ form factors at nonzero recoil and $\| V_{c b} \|$ from $2 + 1$ -flavor lattice QCD Bailey, Jon A.; Bazavov, A.; Bernard, C. Physical Review D, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevD.92.034506	journal	August 2015
Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016 Amhis, Y.; Banerjee, Sw.; Ben-Haim, E. The European Physical Journal C, Vol. 77, Issue 12 https://doi.org/10.1140/epjc/s10052-017-5058-4	journal	December 2017

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Title: Form factor ratios for $B_{s} \to K ℓ ν$ and $B_{s} \to D_{s} ℓ ν$ semileptonic decays and $| V_{u b} / V_{c b} |$