Search

The STAR collaboration has reported precision measurements of the transverse single spin asymmetries for the production of the π0 mesons from polarized proton collisions at s = 200 GeV. These measurements were obtained using modular forward detectors. The Forward Meson Spectrometer (FMS), covering a region of 2.5<η<4.0, and its engineering prototype, provide increased acceptance, as needed for spin-dependent correlation studies that could disentangle contributions to the forward π0 asymmetries. We report on the status of the analysis. [ABSTRACT FROM AUTHOR]

Using the collected sample of 200 million minimum-bias proton-nucleus interactions at 41.6 GeV centre-of-mass energy, HERA-B is measuring the magnitudes of several inclusive particle productions. This contribution reports on preliminary measurements of the D-meson and J/ψ production cross sections and compares them with the current experimental situation. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

HERA-B is performing a comprehensive study of charmonium production based on about 300000 J/ψ’s, 5000 ψ′’s and 15000 χc’s collected using a dedicated dilepton trigger. By presenting preliminary accounts of production kinematics, nuclear dependence and feeddown components, this report illustrates how these measurements are going to improve the current experimental picture of proton-nucleus results. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]