Journal article
B → K l + l − decay form factors from three-flavor lattice QCD
Physical review. D, Vol.93(2), 025026
01/27/2016
DOI: 10.1103/PhysRevD.93.025026
Abstract
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 fT(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.
Details
- Title: Subtitle
- B → K l + l − decay form factors from three-flavor lattice QCD
- Creators
- Jon A Bailey - Seoul National UniversityFermilab Lattice CollaborationMILC Collaboration
- Contributors
- Y Meurice (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Vol.93(2), 025026
- DOI
- 10.1103/PhysRevD.93.025026
- ISSN
- 2470-0010
- eISSN
- 2470-0029
- Publisher
- American Physical Society (APS)
- Grant note
- DOI: 10.13039/100008902, name: Los Alamos National Laboratory; DOI: 10.13039/100000015, name: U.S. Department of Energy, award: DE-FG02-91ER40628, DE-FC02-12ER41879, DE-FG02-91ER40661, DE-SC0010120, DE-FC02-06ER41443, DE-FG02-91ER40677, DE-FG02-13ER42001, DE-FG02-ER41976, DE-SC0010114; DOI: 10.13039/100000001, name: National Science Foundation, award: PHY-10034278, PHY10-67881, PHY-1316748, PHY-1212389, PHY-1417805; DOI: 10.13039/501100004837, name: Ministerio de Ciencia e Innovación, award: FPA2010-16696; DOI: 10.13039/501100002878, name: Consejería de Economía, Innovación, Ciencia y Empleo, Junta de Andalucía, award: FQM-101, FQM-6552; DOI: 10.13039/501100000780, name: European Commission, award: PCIG10-GA-2011-303781; DOI: 10.13039/501100004963, name: Seventh Framework Programme, award: 291763; DOI: 10.13039/501100003725, name: National Research Foundation of Korea; DOI: 10.13039/501100001700, name: Ministry of Education, Culture, Sports, Science, and Technology, award: 2014027937, 2015024974; DOI: 10.13039/501100004085, name: Ministry of Education, Science and Technology; name: European Union’s Marie Curie COFUND program; name: Fermi Research Alliance, award: DE-AC02-07CH11359; name: Creative Research Initiatives Program, award: 2014001852, 2015001776
- Language
- English
- Date published
- 01/27/2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199946202771
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