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Search for new physics in e +- q contact interactions at HERA
(2003)Physics Letters BJournal Article -
Improved search for B-S(0)-(B)over-bar(S)(0) oscillations
(2003)The European Physical Journal CAn improved search for B s 0 oscillations is performed in the ALEPH data sample collected during the first phase of LEP, and reprocessed in 1998. Three analyses based on complementary event selections are presented. First, decays of B s 0 mesons into hadronic flavour eigenstates are fully reconstructed. This selection yields a small sample of candidates with excellent decay length and momentum resolution and hi gh average B s 0 purity. ...Journal Article -
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Isolated electrons and muons in events with missing transverse momentum at HERA
(2003)Physics Letters BJournal Article -
Observation of long ionizing tracks with the ICARUS T600 first half-module
(2003)Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentJournal Article -
Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays
(2003)The European Physical Journal CData from e+e− annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are ...Journal Article -
Measurement of the inclusive D∗± production in γγ collisions at LEP
(2003)The European Physical Journal CThe inclusive production of D∗± mesons in two-photon collisions is measured with the ALEPH detector at e+e- centre-of-mass energies from 183 GeV to 209 GeV. A total of 360±27 D∗± meson events are observed from an integrated luminosity of 699pb-1. Contributions from direct and single-resolved processes are separated using the ratio of the transverse momentum pD∗±t of the D∗± to the visible invariant mass Wvis of the event. Differential ...Journal Article -
Measurement of inclusive jet cross sections in photoproduction at HERA
(2003)The European Physical Journal CInclusive jet cross sections are measured in photoproduction at HERA using the H1 detector. The data sample of e+p→e++jet+X events in the kinematic range of photon virtualities Q2≤1GeV2 and photon-proton centre-of-mass energies 95≤Wγp≤285GeV represents an integrated luminosity of 24.1pb−1. Jets are defined using the inclusive k⊥ algorithm. Single- and multi-differential cross sections are measured as functions of jet transverse energy E ...Journal Article -
Exclusive production of pion and kaon meson pairs in two-photon collisions at LEP
(2003)Physics Letters BJournal Article -