HERA Anomaly and Hard Charm in the Nucleon

Details HERA Anomaly and Hard Charm in the Nucleon HERA Anomaly and Hard Charm in the Nucleon

1997-07-18

arxiv.org/abs/hep-ph/9707387v2

Phys.Lett.B414:134-139,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

extra figure included, version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(97)01150-7

We explore the possibility that the excess neutral and charged current events seen by the H1 and ZEUS Collaborations at HERA at large x and Q^2 could arise from a hard charm component of the nucleon. While the symmetric intrinsic charm hypothesis is unable to account for the HERA anomaly, a non-symmetric charm distribution generated non-perturbatively, for which c-bar is much harder than c, can produce significant enhancement of cross sections at the HERA kinematics.

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