Exclusive channels in high-energy hadronic reactions and Low´s theorem

• Otto Nachtmann

Abstract: Exclusive high - energy reactions at small momentum transfer without and with photon radiation are discussed. The tensor - pomeron model describing such reactions involving hadrons is introduced. As an example pi+ pi- elastic scattering without and with photon radiation is considered. The "exact" model results are compared to approximations based on F. Low´s soft photon theorem.

Bremsstrahlung radiation from charged Reggeon exchanges at high energies

• Rainer Schicker (PI)

The leading contribution to single/double diffractive dissociation and central exclusive production at high energies is by the pomeron trajectory. Reggeon contributions are highly suppressed, but can experimentally be measured by identifying charge exchange reactions. Such reactions channels are accompanied by bremsstrahlung radiation.