Semileptonic decays of Λc+ in dynamical approaches
APS, 2020
Online
academicJournal
- 11
Zugriff:
We study the semileptonic decays of Λc+→Λ(n)ℓ+νℓ in two relativistic dynamical approaches of the light-front constituent quark model (LFCQM) and MIT bag model (MBM). By considering the Fermi statistic between quarks and determining spin-flavor structures in baryons along with the helicity formalism in the two different dynamical models, we calculate the branching ratios (Bs) and averaged asymmetry parameters (αs) in the decays. Explicitly, we find that B(Λc+→Λe+νe)=(3.36±0.87,3.48)% and α(Λc+→Λe+νe)=(−0.97±0.03,−0.83) in (LFCQM, MBM), in comparison with the data of B(Λc+→Λe+νe)=(3.6±0.4)% and α(Λc+→Λe+νe)=−0.86±0.04 given by the Particle Data Group, respectively. We also predict that B(Λc+→ne+νe)=(0.57±0.15,3.6±1.5)×10−3 and α(Λc+→ne+νe)=(−0.98±0.02,−0.96±0.04) in LFCQM with two different scenarios for the momentum distributions of quarks in the neutron and B(Λc+→ne+νe)=0.279×10−2 and α(Λc+→ne+νe)=−0.87 in MBM, which could be tested by the ongoing experiments at BESIII, LHCb, and BELLEII.
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Semileptonic decays of Λc+ in dynamical approaches
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Autor/in / Beteiligte Person: | Geng, C. Q. ; Lih, Chong-Chung ; Liu, Chia-Wei ; Tsai, Tien-Hsueh |
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Veröffentlichung: | APS, 2020 |
Medientyp: | academicJournal |
Umfang: | 11 |
DOI: | 10.1103/PhysRevD.101.094017 |
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