${{\mathit \Lambda}_{{{b}}}^{0}}$ DECAY PARAMETERS

See the note on ``Baryon Decay Parameters'' in the neutron Listings.

$\alpha _{\gamma }$ decay parameter for ${{\mathit \Lambda}_{{{b}}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \gamma}}$

INSPIRE   JSON  (beta) PDGID:
S040A39
Measures asymmetry between left- and right-handed photons in the decay.
VALUE DOCUMENT ID TECN  COMMENT
$0.82$ ${}^{+0.17}_{-0.26}$ ${}^{+0.04}_{-0.13}$ 1
AAIJ
2022M
 LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
1  AAIJ 2022M provides a combined measurement as well as measured ${{\mathit \alpha}_{{{\gamma}}}^{-}}$ = $1.26$ $\pm0.42$ $\pm0.20$ and ${{\mathit \alpha}_{{{\gamma}}}^{+}}$ = $0.55$ $\pm0.32$ $\pm0.16$ for ${{\mathit \Lambda}_{{{b}}}^{0}}$ and ${{\overline{\mathit \Lambda}}_{{{b}}}^{0}}$ separately.
References