1. First Results from Mark II at Spear
- Author
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J. A. Jaros, D. L. Scharre, R. H. Schindler, W. E. Dieterle, D. Lüke, W. R. Innes, E. Vella, A. J. Lankford, M. L. Perl, W. Carithers, J. B. Dillon, J. Dorenbosch, R. F. Schwitters, G. J. Feldman, C. Y. Pang, G. S. Abrams, R. J. Hollebeek, I. Videau, M. S. Alam, J. L. Siegrist, V. Luth, M. W. Eaton, G. G. Hanson, R. R. Larsen, A. D. Johnson, B. Couchman, H. G. Fischer, H. Zaccone, S. Cooper, T. Himel, M. Tonutti, Martin Breidenbach, George Gidal, Kenneth G. Hayes, R. A. Vidal, J. J. Russell, H. Taureg, William Chinowsky, M. J. Longo, C. A. Blocker, D. G. Hitlin, Mark E. Nelson, M. E. B. Franklin, G. Goldhaber, J. M. Weiss, P. Jenni, C. H. Broll, S. R. Shannon, J. F. Patrick, V. I. Telnov, R. E. Millikan, M. W. Coles, J. A. Kadyk, Burton Richter, J. F. Martin, D. L. Burke, James Strait, J. Dorfan, A. M. Boyarski, and G. H. Trilling
- Subjects
Physics ,Particle physics ,Meson ,High Energy Physics::Phenomenology ,Center (category theory) ,Particle accelerator ,Lambda ,Resonance (particle physics) ,law.invention ,Nuclear physics ,Baryon ,law ,High Energy Physics::Experiment ,Production (computer science) ,Nuclear Experiment ,Storage ring - Abstract
In this talk I will report some of the first results from the Mark II experiment at the Stanford Linear Accelerator Center e+e−; storage ring facility SPEAR. The first part will be devoted to a description of the Mark II detector and of its performance. Then I will show preliminary results on a measurement of the inclusive production of baryons \(\left( {p,\,\bar p,\,\Lambda \,and\,\bar \Lambda } \right)\) over the centre-of-mass energy range from 4.5 to 6 GeV in a search for a threshold of charmed baryon production. Data on decays of charmed D mesons have been accumulated at the Ψ ″ (3770) resonance and first results will be given in part three from an analysis of about one-third of the whole data sample. Finally, we have observed, for the first time, evidence for η ′ (958) production in two-photon collisions. We have measured the radiative width of the η ′ through this process as will be discussed in the last part of this talk.
- Published
- 1980
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