121608159
Observation of high transverse momentum electrons at the CERN ISR
Abstract A search for high transverse momentum electrons directly produced in proton-proton collisions has been performed at the CERN ISR. The apparatus included a magnetic spectrometer with wire spark chambers, a lead-glass counter array, and a threshold gas Cerenkov counter. At a centre-of-mass energy √ s = 52.7 GeV, a signal has been observed in the range 1.6 T ∗ GeV /c . The signal occurs at a level of approximately 10 −4 of the inclusive pion cross-section.
122529613
A Measurement of Single Electrons, electron Pairs, and Associated Phenomena, in Proton Proton Collisions at the CERN ISR
Abstract Measurements of single-electron production in proton-proton collisions at the CERN ISR are presented for five centre-of-mass energies √s = 23.5, 30.6, 44.8, 52.7, and 62.4 GeV. The invariant cross sections for single electrons with transverse momenta of 0.60 to 4.7 GeV/c are given. Measurements of electron-positron pairs and measurements of charged hadrons produced in association with the single electrons, are also reported.
91193621
Some expected rates of electron backgrounds for LEP13
120328133
Evidence for pomeron single-quark interactions in proton diffraction at the ISR
Abstract Measurements are presented of two exclusive diffractive reactions, pp → (Λ 0 φ 0 K + ) p and pp → (Λ 0 Λ 0 p)p , at √ s = 63 GeV . Pronounced correlations with the beam direction are observed (in the rest frame of the forward-going bracketed system) for those outgoing particles which contain the beam valence quarks. In each case there is a forward-Λ0 in correlation with a backward K+ or p, respectively. No such behavior is seen for the particles which do not contain beam valence quarks (φ 0 and Λ 0 , respectively) . Interpreted as examples of pomeron-proton scattering, these results constitute evidence that, for these final states, the pomeron interacts with a single valence quark and apparently back-scatters it. The subsequent hadronization leads to a longitudinal event structure.
117328126
Estimates for the rates of off momentum electrons to be expected in LEP
124950735
Observation of πo mesons with large transverse momentum in high-energy proton-proton collisions
Abstract Invariant cross-sections are presented for the inclusive reaction p + p → π o + anything, Measurements of large transverse momentum π o 's (2.5 GeV/ c p ⊥ c ) were made near 90° at the CERN ISR at five centre-of-mass energies (√ s = 23.5, 30.6, 44.8, 52.7 and 62.4 GeV. At large p ⊥ , the invariant cross-sections are seem to vary with s and p ⊥ , in good agreement with a fit of the form Ap ⊥ − n F ( p ⊥ /√ s ), with n ≈8 and F ( p ⊥ /√ s )≈ exp (−26 p ⊥ /√ s ).
117019037
The Lyman-alpha signature of the first galaxies
115904384
Review of Lepton Production in Hadron-Hadron Collisions
The production of leptons, especially at values of transverse momentum well above 1 fermi−1, is a sensitive probe of hadron structure at small distances. In these lectures I hope to summarize in an informal manner the present knowledge of hadronically-produced leptons, with emphasis on the general features of the data, rather than on details of individual experiments. The reader is referred to the many recent reviews1–3) of the subject (some still in press at this time) for other points of view. I have borrowed freely from them, and gladly acknowledge the authors. Also, some aspects of the subject were discussed by Professor Min Chen in his lecture at this School, and are not repeated here.
119595431
A wire-spark-chamber system with on-line computers
Abstract We describe the performance of a system of wire spark chambers and 2 on-line computers (one being time-shared) used in an experiment at the Brookhaven A.G.S. to study the decay of K± mesons via the τ mode (K±→ π ± π ± π ∓).
120145716
The response of air shower arrays to air showers
Abstract The air shower that is measured and analysed by an air shower experiment is not, in general, an unprejudiced derivative of the data. Biases of many kinds are present in these experiments and they can significantly modify the interpretation of the results if not eliminated.
129617632
The Durham Extensive Air Shower Array