The total cross sections of charm and beauty production at a future high–energy ep collider, THERA, are expected to increase by factors of three and five, respectively, as compared to HERA. Heavy quarks can be measured at THERA in wide ranges of transverse momenta and Q values, thereby providing a solid basis for testing the perturbative QCD calculations. The charm and beauty contributions to t...

The asymmetries between charm and anticharm mesons observed in fixedtarget photoproduction experiments are an order of magnitude larger than the asymmetries predicted by conventional perturbative QCD. We show that these charm meson asymmetries can be explained by a heavy-quark recombination mechanism for heavy meson production. In this process, a charm quark combines with a light antiquark from...

Message-Driven Programming style avoids the use of blocking receives and allows overlap of computation and communication by scheduling processes (or objects) depending on availability of messages. Charm is a parallel programming system that uses message-driven execution to exhibit latency-tolerance. Charm supports objects whose methods can be triggered by remote objects asynchronously. Such asy...

We provide predictions for charmonium and open charm production in nuclear collisions at SPS/FAIR energies within the framework of the statistical hadronization model. The increasing importance at lower energies of Λc production is demonstrated and provides a challenge for future experiments. We also demonstrate that, because of the large charm quark mass and the different timescales for charm ...

A range of tools, from parallel debuggers to performance analysis/visualization to simulation visualizers, can benefit from interaction with a running parallel application. To be effective, this live interaction needs to be highly scalable. Such scalability for parallel applications is available in the form of the Charm++/AMPI runtime system. Charm++ is an object-based, message-driven model of ...

BACKGROUND AND PURPOSE Upper limb activity measures for children with cerebral palsy have a number of limitations, for example, lack of validity and poor responsiveness. To overcome these limitations, we developed the Children's Arm Rehabilitation Measure (ChARM), a parent-reported questionnaire validated for children with cerebral palsy aged 5-16 years. This paper describes both the developmen...

Inclusive production of K SK 0 S in ep collisions was studied with the ZEUS detector. Significant production of J = 2 tensor mesons and of the 0 glueball candidate f0(1710) was seen. Masses and widths were compared with previous experiments. The H1 Collaboration saw a charm pentaquark candidate in the D∗p spectrum at 3.1 GeV, which was not confirmed by a ZEUS higher statistics search. With the ...

The asymmetries between charm and anticharm mesons observed in fixedtarget photoproduction experiments are an order of magnitude larger than the asymmetries predicted by conventional perturbative QCD. We show that these charm meson asymmetries can be explained by a perturbative recombination mechanism for heavy meson production. In this process, a charm quark combines with a light antiquark fro...

Recently Plaga [1] claimed that the existence of a vector coupling of neutrinos in neutral currents, observed in the Charm II collaboration [2], led to the conclusion that neutrinos were Dirac particles. Although he successfully defended [1, 3] some of his assertions, his claim that Charm II data inevitably required Dirac neutrinos is not necessarily correct. Namely, Charm II data are fitted wi...

Intrinsic heavy quarks in hadrons emerge from the non-perturbative structure of a hadron bound state [1] and are a rigorous prediction of QCD [2, 3]. Lattice QCD calculations indicate significant intrinsic charm and strangeness probabilities [4, 5]. Since the light-front momentum distribution of the Fock states is maximal at equal rapidity, intrinsic heavy quarks carry significant fractions of ...