How the nuclear Fermi motion plus a simple statistical model explains the EMC effect

Details How the nuclear Fermi motion plus a simple statistical model explains the EMC effect How the nuclear Fermi motion plus a simple statistical model explains the EMC effect

2002-11-20

arxiv.org/abs/hep-ph/0211320v2

Nucl.Phys. A721 (2003) 388-391

Physics

High Energy Physics

High Energy Physics - Phenomenology

Contribution to PANIC 2002 conference, Sept. 30 - October 4, 2002, Osaka, Japan. Some misprints corrected

Scientific paper

We present calculation of influence caused by nucleon Fermi motion on the parton distributions in nuclei. Our approach is based on the model where momenta of valence partons have some primordial distribution inside the hadron at rest, which is either provided by a statistical considerations or calculated using spherically symmetric Gaussian distribution with a width derived from the Heisenberg uncertainty relation. The sea parton contribution emerges from the similar Gaussian distribution with a width dictated by the presence of virtual pions in hadron. We show that the influence of Fermi motion changes substantially the nucleonic structure function inside the nucleus in the right direction and therefore should be considered seriously in all attempts devoted to explain the experimentally observed EMC effect for $x_{Bj} > 0.1$.

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