We present a study of 649±35 e+e−→cc¯ events produced at s√≈10.6 GeV containing both a Λ+c baryon and a Λ¯¯−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 c¯ 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.
|Titolo:||Correlated leading baryon-antibaryon production in e+e−→cc¯→Λ+cΛ¯¯¯−cX|
|Settore Scientifico Disciplinare:||Settore FIS/04 - Fisica Nucleare e Subnucleare|
|Data di pubblicazione:||2010|
|Digital Object Identifier (DOI):||10.1103/PhysRevD.82.091102|
|Appare nelle tipologie:||01 - Articolo su periodico|