Abstract
The charged particle asymmetry, (n +−n −)/(n ++n −), in inclusive photoproduction of charged particles on protons has been studied as a function ofx F andp T in the rangesx F >0 and 0<p T <2 GeV/c and for photon energies in the range 65<E γ<175 GeV. The asymmetry is found to be positive and decreasing withE γ. Asymmetries of π's and K's in the final state have been obtained separately. Data from a carbon target show a significantly lower asymmetry. These results have been compared with a parton, recombination model which provides a qualitative explanation for the asymmetry and itsx F andE γ dependences. The model also gives a qualitative understanding of the lower asymmetry seen with the nuclear target.
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OMEGA Photon Collaboration., Apsimon, R.J., Atkinson, M. et al. Forward charge asymmetry in low-P T photoproduction of hadrons. Z. Phys. C - Particles and Fields 47, 397–400 (1990). https://doi.org/10.1007/BF01565861
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DOI: https://doi.org/10.1007/BF01565861