Heavy quark and direct photon production in hadronic collisions are processes of great interest. The discovery of the top has increased efforts in the calculation of heavy quark production cross sections while direct photon production is important for determinations of gluon distributions. Near threshold for the production of the final state in these processes one can resum logarithmic correcti...

ast week, member states of the World Health Organization (WHO) advanced another step in the nearly 1-year rigorous process of selecting its next director-general. Candidates for the position presented their vision of international health work and the role of this global health body. Having worked at WHO in a number of capacities in the area of infectious diseases, I know well that international...

the most important factor in donor-recipient matching for hematopoietic stem cell transplantation is their hla typing. for many patients, we can not find a full-matched donor. in high risk patients, one locus  mismatched related donors are suitable alternatives. (1, 2) since the matching of patients and their siblings usually is based on low resolution hla typing, the matching of one locus mism...

what counts as wise? Second, does the public, after considerable thought, think that our society has a moral obligation to pursue lines of research which may benefit present and future generations? I say “moral obligation” because it is sometimes implied by advocates of recombinant D N A research that science would be guilty of a sin of omission if it did not continue and promote research so pr...

Adresa za dopisivanje Ivan Galić Dom zdravlja Splitsko-dalmatinske županije Stomatološka ordinacija – Kamenmost Kamenmost bb, 21262 Kamenmost Tel: +385 21 848 052 Fax: +385 21 848 052 [email protected] Sažetak Određivanje dentalne dobi kod djece u razvoju važno je u pedodonciji, ortodonciji i forenzičnoj znanosti. Najčešće se primjenjuje postupak prema Demirjianu nastao na francusko-kanadskom uzo...

The alternative to the standard formulation of the quark-parton model is proposed. Our approach is based on the solution of the master equations relating the structure and distribution functions, which consistently takes into account the intrinsic quark motion in contradistinction to the standard infinite momentum approach, in which this motion is latently suppressed. The model well reproduces ...

The addition of an Abelian family symmetry to the Minimal Supersymmetric Standard Model reproduces the observed hierarchies of quark and lepton masses and quark mixing angles, only if it is anomalous. Green-Schwarz compensation of its anomalies requires the electroweak mixing angle to be sin2 θw = 3/8 at the string scale, without any assumed GUT structure, suggesting a superstring origin for th...

A new relation between ρ-meson mass, weak π-meson decay constant, quark and gluon condensates is derived from the QCD sum rules. As a byproduct an explanation for the dominance of ρρ-decay for the f0(1370)-meson is proposed. Pacs: 12.38.Lg

We study the structure of constituent quarks by dressing bare quarks with the Goldstone bosons and its implications for quark distribution functions of hadrons f1(x), g1(x) and h1(x). In particular we discuss effects of the dressing on the nucleon spin structure, and find that contributions to chiral-odd h1(x) is quite different from those to g1(x), which can be measured in the semi-inclusive p...