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Status of next-generation $\Lambda_b \to p, \Lambda, \Lambda_c$ form-factor calculations

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arxiv 2309.01821 v2 pith:H6EAJZCN submitted 2023-09-04 hep-lat hep-ph

classification hep-lathep-ph
keywords lambdacalculationsensemblesnext-generationaccurateactionadditionalanisotropic
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

I present preliminary results of next-generation lattice-QCD calculations of the $\Lambda_b \to p$, $\Lambda_b \to \Lambda$, and $\Lambda_b \to \Lambda_c$ form factors based on RBC/UKQCD gauge-field ensembles with 2+1 flavors of domain-wall fermions. Compared to the work published in 2015 and 2016, the new calculations include three additional ensembles (one with 139 MeV pion mass, one with 0.073 fm lattice spacing, and one with another volume) and were performed with a more accurate tuning of the charm and bottom anisotropic clover action parameters.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Predicting the spectrum and decay constants of positive-parity heavy-strange mesons using domain-wall fermions

    hep-lat 2025-01 conditional novelty 7.0 of 10

    First lattice calculation of the B*_{s0} and B_{s1} decay constants is presented, alongside D*_{s0} and D_{s1} results, but the fits without two-meson operators may be biased.

  2. SCET sum rules for $\Lambda_b \to \Lambda \ell^+\ell^-$, $\Lambda \gamma$ decays

    hep-ph 2025-06 conditional novelty 6.0 of 10

    SCET light-cone sum rules give NLO soft form factors and small non-factorizable corrections for Λ_b → Λ decays, with a Λ_b → Λ γ branching fraction consistent with data.

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