Study of the decay asymmetry parameter and CP violation parameter in the Lambdac+ --> Lambda pi+ decay
High Energy Physics - Experiment
2008-11-26 v1
Abstract
Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter alpha(Lambdac) in Lambdac --> Lambda pi decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter : A = [alpha(Lambdac)+alpha(antiLambda_c)]/[alpha(Lambdac)-alpha(antiLambda_c)]. We obtain alpha(Lambdac)=-0.78+-0.16+-0.13 and A = -0.07+-0.19+-0.12 where errors are statistical and systematic.
Keywords
Cite
@article{arxiv.hep-ex/0509042,
title = {Study of the decay asymmetry parameter and CP violation parameter in the Lambdac+ --> Lambda pi+ decay},
author = {J. M. Link},
journal= {arXiv preprint arXiv:hep-ex/0509042},
year = {2008}
}
Comments
18 pages, to be submitted to Phys. Lett. B For a list of the FOCUS collaboration, see http://www-focus.fnal.gov/authors.html