@article{2512fe48ff6342f394638ab6448892c7,
title = "Λc → Λ∗ (1520) form factors from lattice QCD and improved analysis of the Λb → Λ∗ (1520) and Λb → Λc∗ (2595,2625) form factors",
abstract = "We present the first lattice-QCD calculation of the form factors governing the charm-baryon semileptonic decays Λc→Λ∗(1520)l+νl. As in our previous calculation of the Λb→Λ∗(1520) form factors, we work in the Λ∗(1520) rest frame, but here we use four different heavy-baryon momenta instead of just two. Because of the lower mass of the Λc, the moderately sized momenta used here are sufficient to determine the form factors in the full kinematic range of the semileptonic decay. We also update the analysis of our lattice results for the Λb→Λ∗(1520) and Λb→Λc∗(2595,2625) form factors by imposing exact relations among the different form factors at zero recoil that follow from rotational symmetry. Imposing these relations ensures the correct behavior of the angular observables near the endpoint.",
author = "Stefan Meinel and Gumaro Rendon",
note = "Funding Information: We thank M. Bordone, S. Descotes-Genon, G. Hiller, C. Marin-Benito, J. Toelstede, D. van Dyk, and R. Zwicky for discussions. We are grateful to the RBC and UKQCD Collaborations for making their gauge field ensembles available. S. M. is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under Award Number DE-SC0009913. G. R. is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-SC0012704 (BNL). The computations for this work were carried out on facilities at the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH1123, and on facilities of the Extreme Science and Engineering Discovery Environment (XSEDE) , which is supported by National Science Foundation Grant number ACI-1548562. We acknowledge the use of Chroma , QPhiX , QLUA , MDWF , and related USQCD software . Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",
year = "2022",
month = mar,
day = "1",
doi = "10.1103/PhysRevD.105.054511",
language = "English (US)",
volume = "105",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "5",
}