| dc.contributor.author | Detmold, William | |
| dc.contributor.author | Lin, C.-J. David | |
| dc.contributor.author | Meinel, Stefan | |
| dc.contributor.author | Wingate, Matthew | |
| dc.date.accessioned | 2013-07-12T18:19:19Z | |
| dc.date.available | 2013-07-12T18:19:19Z | |
| dc.date.issued | 2013-04 | |
| dc.date.submitted | 2013-01 | |
| dc.identifier.issn | 1550-7998 | |
| dc.identifier.issn | 1550-2368 | |
| dc.identifier.uri | http://hdl.handle.net/1721.1/79595 | |
| dc.description.abstract | We present the first lattice QCD determination of the Λ[subscript b→]Λ transition form factors that govern the rare baryonic decays Λ[subscript b→]Λℓ[superscript +]ℓ[superscript -] at leading order in heavy-quark effective theory. Our calculations are performed with 2+1 flavors of domain-wall fermions, at two lattice spacings and with pion masses down to 227 MeV. Three-point functions with a wide range of source-sink separations are used to extract the ground-state contributions. The form factors are extrapolated to the physical values of the light-quark masses and to the continuum limit. We use our results to calculate the differential branching fractions for Λ[subscript b→]Λℓ[superscript +]ℓ[superscript -] with ℓ=e, μ, τ within the standard model. We find agreement with a recent CDF measurement of the Λ[subscript b→]Λμ[superscript +]μ[superscript -] differential branching fraction. | en_US |
| dc.description.sponsorship | United States. Dept. of Energy (Contract DE-FG02-94ER40818) | en_US |
| dc.description.sponsorship | Jeffress Memorial Trust (J-968) | en_US |
| dc.description.sponsorship | United States. Dept. of Energy (Outstanding Junior Investigator) (Award DE-SC000-1784) | en_US |
| dc.description.sponsorship | Science and Technology Facilities Council (Great Britain) | en_US |
| dc.description.sponsorship | IPPP Associateship | en_US |
| dc.language.iso | en_US | |
| dc.publisher | American Physical Society | en_US |
| dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevD.87.074502 | en_US |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
| dc.source | APS | en_US |
| dc.title | Λ[subscript b]→Λℓ[superscript +]ℓ[superscript -] form factors and differential branching fraction from lattice QCD | en_US |
| dc.type | Article | en_US |
| dc.identifier.citation | Detmold, William, C.-J. David Lin, Stefan Meinel, and Matthew Wingate. Λ_{b}→Λℓ^{+}ℓ^{-} Form Factors and Differential Branching Fraction from Lattice QCD. Physical Review D 87, no. 7 (April 2013). © 2013 American Physical Society | en_US |
| dc.contributor.department | Massachusetts Institute of Technology. Center for Theoretical Physics | en_US |
| dc.contributor.department | Massachusetts Institute of Technology. Laboratory for Nuclear Science | en_US |
| dc.contributor.mitauthor | Detmold, William | en_US |
| dc.contributor.mitauthor | Meinel, Stefan | en_US |
| dc.relation.journal | Physical Review D | en_US |
| dc.eprint.version | Final published version | en_US |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
| eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
| dspace.orderedauthors | Detmold, William; Lin, C.-J. David; Meinel, Stefan; Wingate, Matthew | en_US |
| dc.identifier.orcid | https://orcid.org/0000-0002-0400-8363 | |
| mit.license | PUBLISHER_POLICY | en_US |
| mit.metadata.status | Complete | |
