Charm production is studied in deep-inelastic electron-photon scattering using OPAL data at ee centre-of-mass energies from 183 to 209 GeV. Charm quarks are identified by exclusive reconstruction of D mesons. The cross-section of D production is measured in a restricted kinematic region, and then extrapolated to the total charm production cross-section and the charm structure function of the ph...

Production of muons and neutrinos in cosmic ray interactions with the atmosphere has been investigated with Monte Carlo models for hadronic interactions. The resulting conventional muon and neutrino fluxes (from π and K decays) agree well with earlier calculations, whereas our prompt fluxes from charm decays are significantly lower than earlier estimates. Charm production is mainly considered a...

Charm quarks are expected to be produced mainly by the photongluon fusion mechanism in γ −N interactions. However, a small part of the total charm cross section originates in similar processes to those appearing in charm hadroproduction through the resolved (hadronic) component of the photon. Although the contribution of the resolved part of the photon is small at fixed target energies, it can ...

Recent data on B decays involving η′ may be explained if the singlet axial current of charmed quarks has a large matrix element to η′, and instantons were shown to be able to generate this effect. We study the magnitude of charm contributions to nucleon polarized structure functions generated in a similar way. Comparing the charm contribution, which is related to a dim(6) gluonic operator, to t...

Recent measurements by the H1 experiment of the inclusive charm and beauty cross sections in deep inelastic ep scattering at HERA are presented. The data were collected in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb −1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex detector. The measurement of the inclusive c...

Japan is no exception among developed countries facing healthcare system problems due to aging and low birthrate as the number of possible patients increases and health care worker numbers shrink. The introduction of high tech medicine has increased the amount of knowledge to be learned by novice nurses. Although vast amounts of implicit knowledge have accumulated among nursing practitioners, t...

We propose a sensitive measurement of the charm total cross-section at RHIC through muon identification from charm semileptonic decay at low transverse momentum (pT ). This can test the binary-collision scaling (Nbin) properties of the charm total cross-section and be used to study whether heavy-flavor quarks, which are used as a probe, are produced exclusively at the initial impact in hadron-h...

Experimental sensitivity to CP violation in charm decay is beginning to approach the interesting regime (∼ 10) in which new physics may be manifest. In the early years of the 21st century, if the technical challenges can be met, the proposed BTeV experiment should have the best sensitivity for rare effects both in charm and in beauty. 1 Charm CP Violation in the Standard Model and Beyond The St...

The authors examined feminine charm, an impression management technique available to women that combines friendliness with flirtation. They asked whether feminine charm resolves the impression management dilemma facing women who simultaneously pursue task (i.e., economic) and social goals in negotiations. They compared women's social and economic consequences after using feminine charm versus a...

We consider the production of open charm in heavy ion collisions in the framework of the Color Glass Condensate. In the central rapidity region at RHIC, for the charm quark yield we expect Ncoll (number of collisions) scaling in the absence of final–state effects. At higher energies, or forward rapidities at RHIC, the saturation scale exceeds the charm quark mass; we find that this results in t...