13 research outputs found

    Observation of two-jet production in deep inelastic scattering at HERA

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    A sample of events with two distinct jets, in addition to the proton remnant, has been identified in deep inelastic, neutral current ep interactions recorded at HERA by the ZEUS experiment. For these events, the mass of the hadronic system ranges from 40 to 260 GeV. The salient features of the observed jet production agree with the predictions of higher order QCD

    Search for leptoquarks with the ZEUS detector

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    Results are presented on neutral current, deep inelastic scattering measured in collisions of 26.7 GeV electrons and 820 GeV protons. The events typically populate a range in Q2 from 10 to 100 GeV2. The values of x extend down to x ∼ 104^{−4} which is two orders of magnitude lower than previously measured at such Q2 values in fixed target experiments. The measured cross sections are in accord with the extrapolations of current parametrisations of parton distributions

    Search for leptoquarks with the ZEUS detector

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    Observation of events with a large rapidity gap in deep inelastic scattering at HERA

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    In deep inelastic, neutral current scattering of electrons and protons at s=296GeV, we observe in the ZEUS detector events with a large rapidity gap in the hadronic final state. They occur in the region of small Bjorken x and are observed up to Q2 of 100 GeV2. They account for about 5% of the events with Q2⩾10 GeV2. Their general properties are inconsistent with the dominant mechanism of deep inelastic scattering, where color is transferred between the scattered quark and the proton remnant, and suggest that the underlying production mechanism is the diffractive dissociation of the virtual photon

    Search for excited electrons using the ZEUS detector

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    A Measurement of sigma(t) (gamma p) at s**(1/2) = 210-GeV

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    Contains fulltext : 124393.pdf (publisher's version ) (Open Access
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