Proton-proton scattering has been studied at 970 MeV using the Birmingham University 1-BeV synchrotron and a 9-in.-diam liquid-hydrogen bubble chamber; 3945 events have been analyzed and cross sections determined for the various reactions. The elastic scattering cross section of 24.8±0.9 mb is significantly higher than the result of Dowell et al. using counters. The two experiments agree on the shape of the angular distribution, but not on its normalization; possible reasons for this are discussed. The elastic scattering angular distribution is peaked strongly forward, but does not agree quantitively with pure diffraction. Polarization effects observed in the elastic scattering agree with previous and more accurate counter experiments. Inelastic scattering is strongly influenced by the (f , §) w + p resonance and the peripheral mechanism. Theoretical predictions based on the single-pion exchange model are compared in detail with the experimental results and good quantitative agreement is obtained for small momentum transfers, particularly for the reaction p-\-p -> n-\-p-{-w + . Even for small momentum transfers, asymmetries in the Treiman-Yang test and departure from the expected (1+3 cos^) w + -P angular distribution indicate that other mechanisms may be important. The cross section for double-pion production at 970 MeV is less than 0.2 mb.
This paper describes the progress after 2 years of a 3½ year experimental programme organised jointly by two Universities as the Birmingham and Loughborough Electronic Network Development (BLEND). The aims of the programme are to explore and evaluate alternative forms of user communication through an ‘electronic journal’ and information network, and to assess the cost, efficiency and subjective impact of such a system. After summarising the background leading to this research, the project is described which involves the development of various types of ‘electronic journal’ with a community of initially about 50 scientists (the Loughborough Information Network Community—LINC). In this project, the journal procedures involving authors, editors and referees are being studied, up to the point at which editors accept pages for publication. The scientific subject area of this experimental programme is ‘Computer Human Factors’. Each member is expected to contribute at least one research article and one shorter note in each year of the project, and may also use other forms of communication such as messages, newsletters, annotated abstracts, workshop conferences, co‐operative authorship, etc. Considerable problems have been experienced with the hardware available to LINC members, with communications equipment, with modifying and developing software to obtain an acceptable operating system, and with various unexpected bureaucratic and organisational difficulties. These problems and the results to date will be reviewed. Nevertheless, more than 20 papers are in the system and the first number of the ‘Computer Human Factors’ experimental electronic journal was open to LINC members on 1st October 1982.
The interaction of 3.0-GeV/c K + mesons on protons was studied in an exposure of the Brookhaven National Laboratory (BNL) 80-in. hydrogen bubble chamber at the alternating gradient synchrotron (AGS). Results are presented concerning a search for resonances requiring higher SU(3) representations than 8 or 10, namely, an isotopic-spin-1 (K + K + ) or -f (K + TT + ) boson, and an isotopic-spin-0 or -l (K + n) baryon. Evidence is also given for the existence of the N* (1400) resonance, as well as a new {Kir) resonance with mass 1260db20 MeV and width 70 MeV.
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