We present a study of 649±35 e+e-→cc̅ events produced at √s≈10.6 GeV containing both a Λc+ baryon and a Λ̅ c- antibaryon. The number observed is roughly 4 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 c̅ are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6±0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.
Correlated leading baryon-antibaryon production in e+e-→cc̅ →Λc+Λ̅ c-X
GAZ A;SIMI, GABRIELE;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2010
Abstract
We present a study of 649±35 e+e-→cc̅ events produced at √s≈10.6 GeV containing both a Λc+ baryon and a Λ̅ c- antibaryon. The number observed is roughly 4 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 c̅ are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6±0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.File in questo prodotto:
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