Color-allowed Bottom Baryon to $s$-wave and $p$-wave Charmed Baryon non-leptonic Decays
High Energy Physics - Phenomenology
2019-09-04 v2
Abstract
We study color allowed bottom baryon to s-wave and p-wave charmed baryon non-leptonic decays in this work. The charmed baryons include spin-1/2 and spin-3/2 states. Explicitly, we consider Λb→Λc(∗,∗∗)M−, Ξb→Ξc(∗∗)M− and Ωb→Ωc(∗,∗∗)M− decays with M=π,K,ρ,K∗,a1,D,Ds,D∗,Ds∗, Λc(∗,∗∗)=Λc,Λc(2595),Λc(2625),Λc(2765),Λc(2940), Ξc(∗∗)=Ξc,Ξc(2815),Ξc(2790) and Ωc(∗,∗∗)=Ωc,Ωc(2770),Ωc(3050),Ωc(3090),Ωc(3120). There are six types of transitions, namely, (i) Bb(3ˉf,1/2+) to Bc(3ˉf,1/2+), (ii) Bb(6f,1/2+) to Bc(6f,1/2+), (iii) Bb(6f,1/2+) to Bc(6f,3/2+), (iv) Bb(6f,1/2+) to Bc(6f,3/2−), (v) Bb(3ˉf,1/2+) to Bc(3ˉf,1/2−), and (vi) Bb(3ˉf,1/2+) to Bc(3ˉf,3/2−) transitions. Types (i) to (iii) involve spin 1/2 and 3/2 s-wave charmed baryons, while types (iv) to (vi) involve spin 1/2 and 3/2 p-wave charmed baryons. The transition form factors are calculated in the light-front quark model approach. All of the form factors in the 1/2→1/2 and 1/2→3/2 transitions are extracted, and they are found to reasonably satisfy the relations obtained in the heavy quark limit, as we are using heavy but finite mb and mc. Using na\"{i}ve factorization, decay rates and up-down asymmetries of the above modes are predicted and can be checked experimentally. The study on these decay modes may shed light on the quantum numbers of Λc(2765), Λc(2940) Ωc(3050), Ωc(3090) and Ωc(3120).
Cite
@article{arxiv.1905.00153,
title = {Color-allowed Bottom Baryon to $s$-wave and $p$-wave Charmed Baryon non-leptonic Decays},
author = {Chun-Khiang Chua},
journal= {arXiv preprint arXiv:1905.00153},
year = {2019}
}
Comments
To appear in Phys. Rev. D, 45 pages, 15 tables, 6 figures