Orateur
Prof.
Bogdan Povh
(Max-Planck-Institut für Kernphysik)
Description
The forward neutron production in the $ep$ collisions at 300 GeV CM measured by the H1 and ZEUS Collaborations at DESY has been used to estimate the total probability for the proton fluctuation into $n\pi^+$ and $p\pi^0$. The probability found is on the order of the 25\%. This number is compared with the numbers obtained for the probability of quark fluctuation into $\pi^+$ and $\pi^0$ from several alternative DIS processes (Gottfried sum rule, polarized structure function) and the axial-vector coupling constant, where the pion fluctuation is believed to play an important role. The probability for this fluctuation is about 36\%. The experimental results are discussed in frame of the SU2 quark model.
Auteur principal
Prof.
Bogdan Povh
(Max-Planck-Institut für Kernphysik)
