Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks
Using (2 + 1)-flavor lattice QCD, we compute the 10 form factors describing the Λ[subscript b] → Λ matrix elements of the b → s vector, axial vector, and tensor currents. The calculation is based on gauge field ensembles generated by the RBC and UKQCD Collaborations with a domain-wall action for the...
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| Format: | Article |
| Language: | English |
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American Physical Society
2016
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| Online Access: | http://hdl.handle.net/1721.1/102092 https://orcid.org/0000-0002-0400-8363 |
| _version_ | 1811090039393746944 |
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| author | Detmold, William Meinel, Stefan |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Detmold, William Meinel, Stefan |
| author_sort | Detmold, William |
| collection | MIT |
| description | Using (2 + 1)-flavor lattice QCD, we compute the 10 form factors describing the Λ[subscript b] → Λ matrix elements of the b → s vector, axial vector, and tensor currents. The calculation is based on gauge field ensembles generated by the RBC and UKQCD Collaborations with a domain-wall action for the u, d, and s quarks and the Iwasaki gauge action. The b quark is implemented using an anisotropic clover action, tuned nonperturbatively to the physical point, and the currents are renormalized with a mostly nonperturbative method. We perform simultaneous chiral, continuum, and kinematic extrapolations of the form factors through modified z expansions. Using our form factor results, we obtain precise predictions for the Λ[subscript b] → Λ(→ p[superscript +]π[superscript -])μ[superscript +]μ[superscript -] differential branching fraction and angular observables in the Standard Model. |
| first_indexed | 2024-09-23T14:31:05Z |
| format | Article |
| id | mit-1721.1/102092 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:31:05Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1020922022-10-01T21:36:25Z Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks Detmold, William Meinel, Stefan Massachusetts Institute of Technology. Department of Physics Detmold, William Using (2 + 1)-flavor lattice QCD, we compute the 10 form factors describing the Λ[subscript b] → Λ matrix elements of the b → s vector, axial vector, and tensor currents. The calculation is based on gauge field ensembles generated by the RBC and UKQCD Collaborations with a domain-wall action for the u, d, and s quarks and the Iwasaki gauge action. The b quark is implemented using an anisotropic clover action, tuned nonperturbatively to the physical point, and the currents are renormalized with a mostly nonperturbative method. We perform simultaneous chiral, continuum, and kinematic extrapolations of the form factors through modified z expansions. Using our form factor results, we obtain precise predictions for the Λ[subscript b] → Λ(→ p[superscript +]π[superscript -])μ[superscript +]μ[superscript -] differential branching fraction and angular observables in the Standard Model. United States. Dept. of Energy (Early Career Research Award DE-SC0010495) United States. Dept. of Energy (Grant DE-SC0011090) 2016-04-04T15:11:38Z 2016-04-04T15:11:38Z 2016-04 2016-02 2016-04-01T22:00:07Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/102092 Detmold, William, and Stefan Meinel. “Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks.” Phys. Rev. D 93, no. 7 (April 1, 2016). © 2016 American Physical Society https://orcid.org/0000-0002-0400-8363 en http://dx.doi.org/10.1103/PhysRevD.93.074501 Physical Review D 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. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Detmold, William Meinel, Stefan Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title | Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title_full | Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title_fullStr | Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title_full_unstemmed | Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title_short | Λ[subscript b] → Λℓ[superscript +]ℓ[superscript −] form Factors, Differential Branching Fraction, and Angular Observables from Lattice QCD with Relativistic b quarks |
| title_sort | λ subscript b λl superscript l superscript form factors differential branching fraction and angular observables from lattice qcd with relativistic b quarks |
| url | http://hdl.handle.net/1721.1/102092 https://orcid.org/0000-0002-0400-8363 |
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