Odd C-P contributions to diffractive processes

Abstract

We investigate contributions to diffractive scattering, which are odd under C- and P-parity. Comparison of p-$\bar{p}$ and p-p scattering indicates that these odderon contributions are very small and we show how a diquark clustering in the proton can explain this effect. A good probe for the odderon exchange is the photo- and electroproduction of pseudo-scalar mesons. We concentrate on the pi^0 and show that the quasi elastic pi^0-production is again strongly suppressed for a diquark structure of the proton whereas the cross sections for diffractive proton dissociation are larger by orders of magnitude and rather independent of the proton structure.

18 pages, LaTex2e, graphicx package, 14 eps figures included

References in corpus (2)

• Nonperturbative γ^* p Interaction in the Diffractive Regime
• Diffractive color-dipole nucleon scattering

Cited by in corpus (8)

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• Two Photon Reactions at High Energies
• Searching for the Odderon in Ultraperipheral Proton--Ion Collisions at the LHC
• Cubic color charge correlator in a proton made of three quarks and a gluon
• Stronger $C$-odd color charge correlations in the proton at higher energy
• Chiral Symmetry and Diffractive Neutral Pion Photo- and Electroproduction
• Description of elastic vectormeson production and F_2 by two pomerons