Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD

Details Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD

1999-08-13

arxiv.org/abs/hep-ph/9908346v5

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages in Latex file, some comments and one table added

Scientific paper

We study the polarized $\Lambda_b$ baryon semileptonic decay $\Lambda_b \to \Lambda_cl{\bar\nu}$ using perturbative QCD factorization theorem. In this approach heavy baryon transition form factors are expressed as the convolutions of hard $b$ quark decay amplitudes with universal $\Lambda_b$ and $\Lambda_c$ baryon wave functions. With the heavy baryon wave functions determined in our previous work, we predict the asymmetry parameter $\alpha({\hat e})\equiv (N_+-N_-)/(N_++N_-)=-0.31 {\bf P}\cdot{\hat e}$, where ${\bf P}$ is the $\Lambda_b$ baryon polarization, ${\hat e}$ a unit vector perpendicular to the $\Lambda_b$ baryon momentum, $N_+$ ($N_-$) the number of leptons whose momenta possess positive (negative) components along ${\hat e}$. This result is useful for extracting the transverse polarization of a $\Lambda_b$ baryon from data of exclusive semileptonic decays.

Affiliated with

Also associated with

No associations

Rating

Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarized $Λ_b\to Λ_c l \barν$ decay in perturbative QCD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-354715