Rare Λ b → Λ l + l − Decays with Polarized Λ

Ja n 20 01 Rare Λ b → Λ l + l − Decays with Polarized Λ

We investigate the rare baryonic exclusive decays of Λb → Λll (l = e, μ, τ) with polarized Λ. Under the approximation of the heavy quark effective theory (HQET), in the standard model we derive the differential decay rates and various polarization asymmetries by including lepton mass effects. We find that with the long-distance effects the decay branching ratios are 5.3× 10 for Λb → Λll (l = e,...

TECHNION - PH 97 - 02 Inclusive Semileptonic Decays of Polarized Λ b Baryons into Polarized τ - Leptons

ar X iv : h ep - p h / 06 05 24 5 v 1 2 3 M ay 2 00 6 Photon helicity in Λ b →

Radiative decays of polarized Λb baryons represent an attractive possibility to measure the helicity of the photon emitted in the b → sγ quark transition and thus to subject the Standard Model to a stringent test at existing and future hadron colliders. The most abundant mode, Λ(1116)γ, is experimentally very challenging because of the long decay length of the Λ(1116). We show that the experime...

ar X iv : h ep - p h / 06 05 24 5 v 3 1 4 Fe b 20 07 Photon helicity in Λ b → pKγ decays

Radiative decays of polarized Λb baryons represent an attractive possibility to measure the helicity of the photon emitted in the b → sγ quark transition and thus to subject the Standard Model to a stringent test at existing and future hadron colliders. The most abundant mode, Λ(1116)γ, is experimentally very challenging because of the long decay length of the Λ(1116). We show that the experime...

ar X iv : h ep - p h / 06 05 24 5 v 2 8 J an 2 00 7 Photon helicity in Λ b → pKγ decays

Radiative decays of polarized Λb baryons represent an attractive possibility to measure the helicity of the photon emitted in the b → sγ quark transition and thus to subject the Standard Model to a stringent test at existing and future hadron colliders. The most abundant mode, Λ(1116)γ, is experimentally very challenging because of the long decay length of the Λ(1116). We show that the experime...