The $Λ_b\to J/ψ+Λ$ Decay Revisited
| dc.creator | Cheng, Hai-Yang | |
| dc.creator | Tseng, B. | |
| dc.date | 1994-11-03 | |
| dc.date.accessioned | 2026-07-07T06:32:30Z | |
| dc.date.available | 2026-07-07T06:32:30Z | |
| dc.description | The $\b$ decay does not receive any nonspectator contributions and hence its theoretical calculation is relatively clean. Two different methods are employed for the study of $\b$. In the first method, both $b$ and $s$ quarks are treated as heavy and leading $1/m_s$ as well as $1/m_b$ corrections are included. The branching ratio and the asymmetry parameter $α$ are found to be $(0.7-1.5)\times 10^{-3}$ and $0.18$, respectively. In the second method, only the $b$ quark is treated as heavy. The prediction of the decay rate is very sensitive to the choice of the $q^2$ dependence for form factors. We obtain $α=0.31$ and ${\cal B}(\b) \simeq 1.6\times 10^{-4}$ for dipole $q^2$ behavior as well as $8.2\times 10^{-4}$ for monopole $q^2$ dependence. We conclude that ${\cal B}(\b)~{\large ^<_{\sim}}~10^{-3}$ and $α$ is of order $0.20\sim 0.30$ with a positive sign. | |
| dc.description | 7 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9411215 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9411215 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/98919 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The $Λ_b\to J/ψ+Λ$ Decay Revisited | |
| dc.type | text |