Comparison of deep inelastic scattering with photoproduction interactions at HERA

Aid, S.; Andreev, V.; Andrieu, B.; Appuhn, R.D.; Arpagaus, M.; Babaev, A.; Bahr, J.; Ban, J.; Ban, Y.; Baranov, P.

doi:10.1016/0370-2693(95)01054-T

Comparison of deep inelastic scattering with photoproduction interactions at HERA

H1

Collaboration

Aug, 1995

15 pages

Published in:

Phys.Lett.B 358 (1995) 412-422

e-Print:

hep-ex/9508013 [hep-ex]

DOI:

10.1016/0370-2693(95)01054-T

Report number:

DESY-95-156

Experiments:

DESY-HERA-H1

View in:

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Abstract:

Photon-proton (

\gamma p

) interactions with

Q~2<10~{-2}

GeV

~2

and deep-inelastic scattering (

\gamma~* p

) interactions with photon virtualities Q~2>5GeV

~2

are studied at the high energy electron-proton collider HERA. The transverse energy flow and relative rates of large rapidity gap events are compared in the two event samples. The observed similarity between

\gamma p

and

\gamma~* p

interactions can be understood in a picture where the photon develops as a hadronic object. The transverse energy density measured in the central region of the collision, at

\eta~*=0

in the \gsp centre of mass frame, is compared with data from hadron-hadron interactions as function of the CMS energy of the collision.

Note:

15 pages, latex, 4 figures appended as uuencoded file Report-no: DESY 95-156

electron p: colliding beams
colliding beams: electron p
electron p: deep inelastic scattering
deep inelastic scattering: electron p
exchange: one-photon
one-photon: exchange
photon p: interaction
interaction: photon p
hadron: photoproduction
photoproduction: hadron

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