arXiv subjects

A. Schafer

Publications and source records attributed to A. Schafer.

57 records · Page 4Linked to original sources

arXiv1997

Semi-inclusive asymmetries with polarized proton beams at HERA

The prospects of semi-inclusive measurements with polarized proton beams at HERA are discussed. Detailed simulations show that one can disentangle the valence-quark and sea-quark contribution to the polarized structure function g_1(x) in the small x-domain, if the equivalent of 1000 pb-1 of data are collected. It is also shown how semi-inclusive charged- current events can provide information on the relative importance of the spin contribution of the anti-s and anti-d sea quarks. Moreover, various methods to determine the fragmentation functions in this kinematical domain are presented.

hep-ph↗

arXiv1997

Recent developments of PEPSI and SPHINX

Recent developments of the two MC-generators SPHINX and PEPSI are discussed. In SPHINX the process of polarized photo production was included to simulate the potential of a polarized HERA to measure the photon structure function. In PEPSI the CC polarized cross sections on tree level have been added together with the electroweak corrections to simulate their effect on CC signals proposed for a polarized HERA.

hep-ph↗

arXiv1995

Interplay between polarized DIS and RHIC spin physics

The complementarity of polarized DIS experiments and polarized Proton-Proton experiments is illustrated for two examples. It is shown how the twist-3 part of the second moment of $g_2(x,Q^2)$ and the single-spin photon asymmetry are connected and it is discussed how the polarized gluon distribution can be obtained from the measurement of direct gamma asymmetries.

hep-ph↗