The production of charm and beauty quarks in ep interactions has been measured with the ZEUS detector at HERA for squared four-momentum exchange Q 2 > 20 GeV 2 , using an integrated lu-minosity of 126 pb −1. Charm and beauty quarks were identified through their decays into muons. Cross sections are presented for muon transverse momenta p µ T > 1.5 GeV and pseudorapidities −1.6 < η µ < 2.3. The ...

Open charm production during the equilibration of a gluon dominated parton plasma is calculated, with both the time-dependent temperature and parton densities given by a set of rate equations. Including pre-thermal production, the total enhancement of open charm production over the initial gluon fusion depends sensitively on the initial parton density and the effective temperature. The dependen...

Charm++ is a parallel programming system that evolved over the past 20 years to become a well-established system for programming parallel science and engineering applications, in addition to the combinatorial search applications with which it started. At its earliest point, the precursor to Charm++, the Chare Kernel, was a purely reactive specification, similar to most actor languages. This pap...

Recent experiments at Fermilab and CERN have observed a strong asymmetry between the hadroproduction cross sections of leading D mesons, containing projectile valence quarks, and nonleading charmed mesons, without projectile valence quarks. The observed correlations of the πN → DX cross section with the projectile charge violates the usual assumption that heavy quark jet fragmentation factorize...

It is widely believed that charm meson production and decay may play an important role in high energy astrophysical sources of neutrinos, especially those that are baryon-rich, providing an environment conducive to pp interactions. Using slowjet supernovae (SJS) as an example of such a source, we study the detectability of high-energy neutrinos, paying particular attention to those produced fro...

We present recent results on charm physics from CLEO-III, emphasizing QCD and hadronic structure. These include the decay Ξ 0 c → pK − K − π + and the form factor for D 0 → π − e + νe. We also discuss upcoming measurements with CLEO-c, including dramatic improvements in the D 0 → π − e + νe form factor, and glueball spectroscopy in J/ψ → γX. The CLEO collaboration has been in existence for over...

Experiments on charm hadroproduction have shown a substantial difference in the production of charm and anticharm hadrons. In this work we study Λ+ c and Λ c inclusive production in p−N interactions in the framework of two component models. We show that the recombination two component model gives a qualitatively and quantitatively good description of Λ c production while the intrinsic charm mod...