The diffractive dissociation of photons with virtuality Q(2) < 0.7 GeV2, gamma *p --> Xp, has been studied in ep interactions with the ZEUS detector at HERA. For a subsample of the data, the scattered proton was measured with the Leading Proton Spectrometer. The dependence of the diffractive cross section on the photon-proton centre-of-mass energy is used to determine the Pomeron intercept. The diffractive structure function F-2(D) is measured and its dependence on Q(2) studied. At the small values of Q(2) considered, F-2(D) exhibits a strong Q(2) dependence, a result at variance with what has been observed at higher Q(2) values.
The diffractive dissociation of photons with virtuality Q(2) < 0.7 GeV2, gamma *p --> Xp, has been studied in ep interactions with the ZEUS detector at HERA. For a subsample of the data, the scattered proton was measured with the Leading Proton Spectrometer. The dependence of the diffractive cross section on the photon-proton centre-of-mass energy is used to determine the Pomeron intercept. The diffractive structure function F-2(D) is measured and its dependence on Q(2) studied. At the small values of Q(2) considered, F-2(D) exhibits a strong Q(2) dependence, a result at variance with what has been observed at higher Q(2) values.
F-2(D) at low Q(2) at HERA
CAPUA, Marcella
2001-01-01
Abstract
The diffractive dissociation of photons with virtuality Q(2) < 0.7 GeV2, gamma *p --> Xp, has been studied in ep interactions with the ZEUS detector at HERA. For a subsample of the data, the scattered proton was measured with the Leading Proton Spectrometer. The dependence of the diffractive cross section on the photon-proton centre-of-mass energy is used to determine the Pomeron intercept. The diffractive structure function F-2(D) is measured and its dependence on Q(2) studied. At the small values of Q(2) considered, F-2(D) exhibits a strong Q(2) dependence, a result at variance with what has been observed at higher Q(2) values.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
