The recent progress in our understanding of heavy-flavour decays allows us to define more reliably which future measurements on charm decays are needed to further advance our understanding of QCD and to get our theoretical tools ready for treating beauty decays. After sketching the theoretical landscape I list those required measurements. I argue that some – in particular those concerning inclu...

I review the sensitivities achieved by and projected for fixed-target charm experiments in CP violation, flavor-changing neutral-current and lepton-number-violating decays, and mixing, and I describe the Charm2000 experiment intended to run at Fermilab in the Year ≈2000. If approved, Charm2000 will in many of these areas exceed the sensitivities projected for a Tau/Charm Factory, but the Tau/Ch...

There have been great advances in charm physics at the B-factories in recent years, including the observation of D-D 0 mixing and the discovery of many new hidden-charm states, some of them presumably exotic in structure. This talk reviews some of the recent Belle results, with emphasis on the hidden-charm sector. Evidence for two new charged states is presented for the first time at this confe...

The current plans for a high luminosity e+ecollider operated between 3.0 and 4.4 GeV/c2 are described. Such a dedicated facility (The Tau-Charm Factory), operating near tau-pair and charm thresholds would allow studies of the decay of the third generation tau-lepton and the second generation c-quark with unprecedented precision and control of systematics. The charm physics of such a facility is...

The semileptonic decays of charm particles continue to be an important area of research. The branching fractions provide measurements of CKM matrix elements in the charm sector, |Vcq| . All hadronic complications are contained in the form factors, which can be calculated via nonperturbative lattice QCD, Heavy Quark Effective Theories, Quark Models, and other methods. By comparing experimental o...

Open charm production in electron-proton (ep) scattering at the high energies of HERA (centreof-mass energy √ s ∼ 320 GeV) is an ideal tool to study perturbative Quantum Chromodynamics (pQCD), since the charm mass provides a hard scale. The main charm production mechanism is photon-gluon fusion (PGF) where a photon emitted by the incoming electron interacts with a gluon in the proton forming a ...

The charm quark photoproduction at large transverse momentum in the resolved photon interaction via partonic subprocess c(γ)g → cg is studied. It is shown that at HERA energies the contribution of the charm quark excitation in the photon in the inclusive charm production at p⊥ > 5 GeV/c dominates over the other resolved photon contribution via the gluon content of the photon and it is about 30%...

We compute the predictions of intrinsic charm for deep-inelastic scattering at high-Q 2 and compare to HERA data. With the inclusion of constraints from low-energy data, enhancements beyond the predictions of standard structure functions are very modest, but peaking in the leptoquark mass variable is present near 200 GeV. Ultimately, the ability of HERA to probe the intrinsic charm hypothesis c...

The performance of a transaction processing system whose database is not completely memory-resident critically depends on the amount of physical disk I/O required. This paper describes a high-performance transaction processing system called Charm, which aims to reducing the concurrency control overhead by minimizing the performance impacts of disk I/O on lock contention delay. In existing trans...