20 research outputs found
Observation of the Charmed Baryon Decays to , , and
We have observed two new decay modes of the charmed baryon into
and using data collected with the
CLEO II detector. We also present the first measurement of the branching
fraction for the previously observed decay mode . The branching fractions for these three modes relative to
are measured to be , , and , respectively.Comment: 12 page uuencoded postscript file, postscript file also available
through http://w4.lns.cornell.edu/public/CLN
Rare baryon decays Λb→Λℓ+ ℓ- (ℓ=e, μ, τ) and Λ b→Λγ: Differential and total rates, lepton- and hadron-side forward-backward asymmetries
Using the covariant constituent quark model previously developed by us we
calculate the differential rate and the forward-backward asymmetries on the
lepton and hadron side for the rare baryon decays Lambda_b -> Lambda l+ l-
(l=e, mu, tau) and Lambda_b -> Lambda gamma. We use helicity methods to write
down a three-fold joint angular decay distribution for the cascade decay
Lambda_b -> Lambda (-> p pi-) + J_eff (-> l+ l-). Through appropriate angular
integrations we obtain expressions for the rates, the lepton-side
forward-backward (FB) asymmetry and the polarization of the daughter baryon
Lambda leading to a hadron-side forward-backward asymmetry. We present
numerical results on these observables using the covariant quark model and
compare our results to the results of other calculations that have appeared in
the literature.Comment: 36 pages, 26 figure
Rare baryon decays Λb→Λℓ+ ℓ- (ℓ=e, μ, τ) and Λ b→Λγ: Differential and total rates, lepton- and hadron-side forward-backward asymmetries
U članku se opisuje što je sakrament pomirenja i pokore, njegov povijesni razvikat i što naglašava Novi Obrednik za sakramentalnu službu pomirenja i pokore