3 papers
hep-ph2005
Hard Scattering in a Nuclear Environment: Farewell to Linear -Factorization
N. N. Nikolaev, W. Schäfer, B. G. Zakharov +1
We discuss a dramatic change brought into the pQCD description of hard processes in a nuclear environment by a large thickness of heavy nuclei. It breaks the familiar linear $k_{\p…
hep-ph2003
Impact of saturation on s-channel helicity nonconservation for diffractive vector mesons
I. P. Ivanov, N. N. Nikolaev, W. Schäfer
As Glauber has shown in 1959, the spin-flip phenomena caused by the conventional spin-orbit interaction do vanish in the scattering off heavy, strongly absorbing nuclei. On the oth…
hep-ph1999
Nonperturbative effects in the proton sea
W. Schäfer, J. Speth
We revisit the evaluation of the pionic mechanism of the -asymmetry in the proton structure function. Our analysis is based on the unitarity relation between contr…