Rare Λ _c→ p ℓ ⁺ℓ ^- Λ c → p ℓ + ℓ - decay in the relativistic quark model

2018/05/31 by R. N. Faustov, V. O. Galkin
Physics and Astronomy · #Angular momentum #Basis (linear algebra) #Branching fraction #High-Energy Particle Collisions Research #Limit (mathematics) #Meson #Momentum transfer #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-018-6010-y

published as Eur.Phys.J. C78 (2018) no.6, 527 · 12 pages, 4 figures, Published version. arXiv admin note: text overlap with arXiv:1610.00957

openalex created_date 2018/05/17 · openalex publication_date 2018/06/01 · arxiv created 2018/07/06 · arxiv updated 2018/07/10 · openalex updated_date 2026/08/05

Abstract

The relativistic quark model based on the quasipotential approach with the QCD-motivate potential is employed for the calculation of the form factors of the Λ _c→ p rare weak transitions. Their momentum dependence is explicitly determined without additional assumptions and extrapolations in the whole kinematical range of the momentum transfer squared q² . The differential Λ _c→ p l⁺l^- decay branching fractions and angular distributions are calculated on the basis of these form factors. Both the perturbative and effective Wilson coefficients, which include contributions of vector meson resonances, are used. The calculated branching fraction of the Λ _c→ p μ ⁺μ ^- rare decay is well consistent with the experimental upper limit very recently set by the LHCb Collaboration.

Citations

• Semileptonic decays of Λ_c baryons in the relativistic quark model
• Masses of excited heavy baryons in the relativistic quark–diquark picture
• Strange baryon spectroscopy in the relativistic quark model
• Weak Interactions with Lepton-Hadron Symmetry
• SemileptonicΛb,cto nucleon transitions in full QCD at light cone
• Search for the rare decay Λc+→pμ+μ−
• Review of Multibody Charm Analyses