Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambda_c+ antiLambda_c- X
High Energy Physics - Experiment
2010-12-13 v1
Abstract
We present a study of 649 \pm 35 e+e- --> ccbar events produced at sqrt{s}~10.6 GeV containing both a Lambda_c baryon and a Lambda_c antibaryon. The number observed is roughly four times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Collaboration. We find a 2-jet topology in these events but very few additional baryons, demonstrating that the primary c and cbar are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6 \pm 0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.
Cite
@article{arxiv.1006.2216,
title = {Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambda_c+ antiLambda_c- X},
author = {The BABAR Collaboration and B. Aubert},
journal= {arXiv preprint arXiv:1006.2216},
year = {2010}
}
Comments
8 pages, 3 postscript figures, submitted to Phys.Rev D-RC