32 Result(s)
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Article
Recent studies of unstable nuclei far from stability with the on-line isotope separators of JAERI
Studies on the decay of unstable nuclei using the two on-line isotope separators of JAERI are reviewed for the past five years. With the previously established ion-source technique using mono-oxide ion formati...
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Article
Diffractive dijet cross sections in photoproduction at HERA
Differential dijet cross sections have been measured with the ZEUS detector for photoproduction events in which the hadronic final state containing the jets is separated with respect to the outgoing proton dir...
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Article
Measurement of the diffractive structure functionF 2 D(4) at HERA
This paper presents the first analysis of diffractive photon dissociation events in deep inelastic positron-proton scattering at HERA in which the proton in the final state is detected and its momentum measure...
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Article
Comparison of ZEUS data with standard model predictions for e+p → e+X scattering at high x and Q2
Using the ZEUS detector at HERA, we have studied the reaction e+p → e+ X for Q2 > 5000 GeV2 with a 20.1 pb−1 data sample collected during the years 1994 to 1996. For Q2 below 15000 GeV2, the data ...
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Article
Measurement of theF 2 structure function in deep inelastice + p scattering using 1994 data from the ZEUS detector at HERA
We present measurements of the structure functionF 2 ine + p scattering at HERA in the range 3.5 GeV2<Q 2<5000 GeV2. A new reconstruction method has...
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Article
Study of charged—currentep interactions atQ 2>200 GeV2 with the ZEUS detector at HERA
Deep inelastic charged-current reactions have been studied ine + p ande − p collisions at a center of mass energy of about 300GeV in the kinematic r...
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Article
Inclusive charged particle distributions in deep inelastic scattering events at HERA
A measurement of inclusive charged particle distributions in deep inelasticep scattering forγ*p centre-of-mass energies 75<W<175 GeV and momentum transfer squared 10<Q 2<160 GeV2 from the ...
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Article
Study of inclusive baryon-antibaryon pair production ofp orΛ in two-photon processes
Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at thee + e − collider TRISTAN, and correspond to an integrated lu...
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Article
Measurement of elasticρ 0 photoproduction at HERA
Elasticρ 0 photoproduction has been measured using the ZEUS detector at HERA. Untagged photoproduction events fromep interactions were used to measure the reactionγp→ρ 0 ...
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Article
Measurement of the diffractive structure function in deep inelastic scattering at HERA
This paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced inep interactions at HERA. The events are characterised by a rapidity gap between the outgoing ...
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Article
Measurement of the proton structure functionF 2 at lowx and lowQ 2 at HERA
We report on a measurement of the proton structure functionF 2 in the range 3.5×10−5≤x≤4×10−3 and 1.5 GeV2≤Q 2≤15GeV2 at theep collider HERA operating at a centre-of-mass energy of...
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Article
A search for excited fermions in electron-proton collisions at HERA
A search for excited states of the standard model fermions was performed using the ZEUS detector at the HERA electron-proton collider, operating at a centre of mass energy of 296 GeV. In a sample corresponding...
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Article
Measurement of the proton structure functionF 2 from the 1993 HERA data
The ZEUS detector has been used to measure the proton structure functionF 2. During 1993 HERA collided 26.7 GeV electrons on 820 GeV protons. The data sample corresponds to an integrated luminosity of 0.54 pb−1, ...
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Article
Inclusive transverse momentum distributions of charged particles in diffractive and non-diffractive photoproduction at HERA
Inclusive transverse momentum spectra of charged particles in photoproduction events in the laboratory pseudorapidity range −1.2<η<1.4 have been measured up top T =8 GeV usign t...
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Article
Neutral strange particle production in deep inelastic scattering at HERA
This paper presents measurements ofK 0 and Λ production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 10<Q 2<640 GeV2, 0.0003<x<0.01, andy>0.04. Av...
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Article
Measurement of multiplicity and momentum spectra in the current fragmentation region of the Breit frame at HERA
Charged particle production has been measured in Deep Inelastic Scattering (DIS) events using the ZEUS detector over a large range ofQ 2 from 10 to 1280 GeV2. The evolution withQ of the charged multiplicity and s...
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Article
Jet production in highQ 2 deep-inelastic ep scattering at HERA
Two-jet production in deep-inelastic electron-proton scattering has been studied for 160<Q 2<1280 GeV2, 0.01<x<0.1 and 0.04<y<0.95 with the ZEUS detector at HERA. The kinematic properties of the jets and the jet ...
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Article
Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy
Photon proton cross sections for elastic light vector meson production, σ el νp , inelastic diffractive production, σ nd νp ...
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Article
Measurement of open charm production in two-photon processes with detection of electron-inclusive events
Experimental studies of open charm production in two-photon processes have been performed. In the measurement, charmed hadrons were identified by electrons from their semi-leptonic decays. The result was compa...
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Article
Hadronic energy distributions in deep-inelastic electron-proton scattering
This paper presents energy distributions of the hadronic system produced in neutral-current electron-proton deep-inelastic scattering at a centre of mass energy of 296 GeV. Comparison of the results with QCD M...
