Speaker
Description
Weak decay of beauty baryons in quark-diquark
model
The weak decays of $\Lambda_{b}$ provide valuable information of the
CKM parameter Vcb, fragmentation and hadronisation within the
framework of quantum chromodynamics. Recently, LHCb has reported
Branching ratios for non-leptonic decay $\Lambda_b^0\to\Lambda_c^+
\pi^-$$ = 4.3\pm 0.51 \times 10^{-3} $. This
experimental measurement generates great theoretical interests in
semi-leptonic decays of heavy flavour baryons. In the present study,
for the description of the $\Lambda_{b}$ baryon, we employ the
quark-diquark model with two body color coulomb plus power
potential. The model parameters are fixed using the
hyperfine mass splitting for each choice of the potential exponent
$\nu$, choice of running strong coupling constant $\alpha_{s}$ and
with different quark mass parameters $m_{Q}$. These extracted
spectroscopic parameters are used to compute decay widths of the
non-leptonic and semi-leptonic decays of $\Lambda_{b}$ baryon. The
results for branching ratios of non-leptonic decays
$\Lambda_b\to\Lambda_c^+ \pi^-$ $ = 4.91 \times 10^{-3} $
and semileptonic decay widths
$\Lambda_{b}\rightarrow X_{c}l\nu_{l}$$ = 6.13 \times 10^{10}s^{-1}
$ are in good agreement with the predictions with the recent
experimental results.
| Preferred Track | Open Heavy Flavors |
|---|---|
| Collaboration | Other |
