M. Zimmer

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A measurement of the proton structure function F 2 (x; Q 2) is reported for momentum transfers squared Q 2 between 4.5 GeV 2 and 1600 GeV 2 and for Bjorken x between 1:810 ?4 and 0:13 using data collected by the HERA experiment H1 in 1993. It is observed that F 2 increases signiicantly with decreasing x, connrming our previous measurement made with one(More)
Evidence is presented using data taken with the H1 detector at HERA for a class of deep inelastic electron{proton scattering (DIS) events (5 < Q 2 < 120 GeV 2) at low Bjorken-x (10 ?4 < x < 10 ?2) which have almost no hadronic energy ow in a large interval of pseudo-rapidity around the proton remnant direction and which cannot be attributed to our present(More)
A search in the H1 experiment at HERA for scalar and vector leptoquarks, leptogluons and squarks coupling to rst generation fermions is presented in a data sample corresponding to an integrated luminosity of 425 nb ?1. For masses ranging up to 275 GeV, no signiicant evidence for the direct production of such particles is found in various possible decay(More)
Photoproduction of 2-jet events is studied with the H1 detector at HERA. Parton cross sections are extracted from the data by an unfolding method using leading order parton-jet correlations of a QCD generator. The gluon distribution in the photon is derived in the fractional momentum range 0:04 x 1 at the average factorization scale 75 GeV 2. H1(More)
An analysis is presented of scaling violations of the proton structure function F 2 (x; Q 2) measured with the H1 detector at HERA in the range of Bjorken x values between x = 310 ?4 and 10 ?2 for four-momentum transfers Q 2 larger than 8.7 GeV 2. The structure function F 2 (x; Q 2) is observed to rise linearly with lnQ 2. Under the assumption that the(More)
A search for direct production of new leptons in the mass range from 10 GeV up to 225 GeV is presented by the H1 experiment at HERA. The data were obtained during 1993 and correspond to an integrated luminosity of 528 nb ?1. The search includes heavy lepton decays to nal states e () and e () W, e () Z with the subsequent decay of the W and Z bosons into(More)
Cross sections are presented for the inclusive production of charged particles measured in electron-proton collisions at low Q 2 with the H1 detector at HERA. The transverse momentum distribution extends up to 8 GeV/c. Its shape is found to be harder than that observed in pp collisions at comparable centre-of-mass energies p s p p s pp 200 GeV, and also(More)
Global properties of the hadronic nal state in deep inelastic scattering events at HERA are investigated. The data are corrected for detector eeects and are compared directly with QCD phenomenology. Energy ows in both the laboratory frame and the hadronic centre of mass system and energy-energy correlations in the laboratory frame are presented. Comparing(More)
Photon-proton (p) interactions with Q 2 < 10 ?2 GeV 2 and deep-inelastic scattering (p) interactions with photon virtualities Q 2 > 5 GeV 2 are studied at the high energy electron-proton collider HERA. The transverse energy ow and relative rates of large rapidity gap events are compared in the two event samples. The observed similarity between p and p(More)