Production of Doubly Charmed Baryons
in Hadronic Experiments

A. V. Berezhnoy, V. V. Kiselev, A. K. Likhoded, and A. I. Onishchenko

State Research Center Institute for High Energy Physics, Protvino, Moscow oblast, 142284 Russia

Received March 19, 1997

Abstract—In the leading order of perturbative QCD, the cross section for the hadroproduction of doubly
charmed baryons is calculated for various experimental conditions. It is shown that an experimental estimate of
the cross section for J/ + D + production would make it possible to reduce the uncertainty that arbitrariness
in choosing _s and m_c values introduces in the cross section for the production of doubly charmed baryons. It
is demonstrated that the contribution of _cc and to the total yield of charm is about 10⁶10⁵ in the fixed-
target HERA-B and E781 experiments. At Tevatron and LHC, the analogous suppression factor is about
10⁴10³. The observation of the doubly charmed baryons _cc and is virtually impossible in the E781
experiment. At the same time, the expected number of events featuring double charm may amount to about
10⁵at HERA-B and Tevatron and to 10⁹ at LHC.

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