$B\to Kl^+l^-$ decay form factors from three-flavor lattice QCD

Bailey, Jon A.

doi:10.1103/PhysRevD.93.025026

Title: $$B\to Kl^+l^-$$ decay form factors from three-flavor lattice QCD

Journal Article · Wed Jan 27 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.025026· OSTI ID:1247500

Bailey, Jon A. ^[1]

Seoul National Univ., Seoul (Korea, Republic of). et al.

We compute the form factors for the B → Kl⁺l^- semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by the MILC Collaboration. The ensembles span lattice spacings from 0.12 to 0.045 fm and have multiple sea-quark masses to help control the chiral extrapolation. The asqtad improved staggered action is used for the light valence and sea quarks, and the clover action with the Fermilab interpretation is used for the heavy b quark. We present results for the form factors f+(q²), f₀(q²), and f_T(q²), where q² is the momentum transfer, together with a comprehensive examination of systematic errors. Lattice QCD determines the form factors for a limited range of q², and we use the model-independent z expansion to cover the whole kinematically allowed range. We present our final form-factor results as coefficients of the z expansion and the correlations between them, where the errors on the coefficients include statistical and all systematic uncertainties. Lastly, we use this complete description of the form factors to test QCD predictions of the form factors at high and low q².

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

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

Contributing Organization:: Fermilab Lattice and MILC Collaborations

Grant/Contract Number:: AC02-07CH11359; FG02-91ER40628; FC02-12ER41879; FG02-91ER40661; SC0010120; FC02-06ER41443; FG02-91ER40677; FG02-13ER42001; FG02-ER41976; SC0010114

OSTI ID:: 1247500

Alternate ID(s):: OSTI ID: 1236297

Report Number(s):: FERMILAB-PUB-15-403-T; arXiv:1509.06235; PRVDAQ; 1394175

Journal Information:: Physical Review D, Vol. 93, Issue 2; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 86 works

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$B_{(s)}^{0}$ -mixing matrix elements from lattice QCD for the Standard Model and beyond Bazavov, A.; Bernard, C.; Bouchard, C. M. Physical Review D, Vol. 93, Issue 11 https://doi.org/10.1103/physrevd.93.113016	journal	June 2016
New physics in $b \to s μ^{+} μ^{-}$ : Distinguishing models through $C P$ -violating effects Alok, Ashutosh Kumar; Bhattacharya, Bhubanjyoti; Kumar, Dinesh Physical Review D, Vol. 96, Issue 1 https://doi.org/10.1103/physrevd.96.015034	journal	July 2017
New light mediators for the $R_{K}$ and $R_{K^{*}}$ puzzles Datta, Alakabha; Kumar, Jacky; Liao, Jiajun Physical Review D, Vol. 97, Issue 11 https://doi.org/10.1103/physrevd.97.115038	journal	June 2018
Angular analysis of the decay $B^{+} \to K^{+} μ^{+} μ^{-}$ in proton-proton collisions at $\sqrt{s} = 8 TeV$ Sirunyan, A. M.; Tumasyan, A.; Adam, W. Physical Review D, Vol. 98, Issue 11 https://doi.org/10.1103/physrevd.98.112011	journal	December 2018
On flavourful Easter eggs for New Physics hunger and lepton flavour universality violation Ciuchini, Marco; Coutinho, António M.; Fedele, Marco The European Physical Journal C, Vol. 77, Issue 10 https://doi.org/10.1140/epjc/s10052-017-5270-2	journal	October 2017
Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee Kamenik, J. F.; Monteil, S.; Semkiv, A. The European Physical Journal C, Vol. 77, Issue 10 https://doi.org/10.1140/epjc/s10052-017-5272-0	journal	October 2017
New Physics in $${\varvec{b \rightarrow s \ell ^+ \ell ^-}}$$ b → s ℓ + ℓ - confronts new data on lepton universality Ciuchini, Marco; Coutinho, António M.; Fedele, Marco The European Physical Journal C, Vol. 79, Issue 8 https://doi.org/10.1140/epjc/s10052-019-7210-9	journal	August 2019
Implications for new physics in $$b\rightarrow s \mu \mu $$b→sμμ transitions after recent measurements by Belle and LHCb Kowalska, Kamila; Kumar, Dinesh; Sessolo, Enrico Maria The European Physical Journal C, Vol. 79, Issue 10 https://doi.org/10.1140/epjc/s10052-019-7330-2	journal	October 2019
FLAG Review 2019 Aoki, S.; Aoki, Y.; Becirevic, D. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-00055	text	January 2019
FLAG Review 2019: Flavour Lattice Averaging Group (FLAG) Aoki, S.; Aoki, Y.; Bečirević, D. The European Physical Journal C, Vol. 80, Issue 2 https://doi.org/10.1140/epjc/s10052-019-7354-7	journal	February 2020
Angular analysis of the decay B+→K+μ+μ− in proton-proton collisions at √s=8 TeV Collaboration, Cms; M., Sirunyan, Albert; Malte, Backhaus, ETH Zurich https://doi.org/10.3929/ethz-b-000315744	text	January 2018
Angular analysis of the decay B+→K+μ+μ− in proton-proton collisions at √s=8 TeV Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang RWTH Aachen University https://doi.org/10.18154/rwth-2019-00740	text	January 2018
FLAG Review 2019 Aoki, S.; Aoki, Y.; Bečirević, D. Springer https://doi.org/10.7892/boris.141201	text	January 2020
FLAG Review 2019 Aoki, S.; Aoki, Y.; Becirevic, D. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-04064	text	January 2020
Deuterium target data for precision neutrino-nucleus cross sections Meyer, Aaron S.; Betancourt, Minerba; Gran, Richard arXiv https://doi.org/10.48550/arxiv.1603.03048	text	January 2016

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