| Početna stranica > An upper limit to the cross section for the reaction nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ at SPS energies |
| Article | |
| Title | An upper limit to the cross section for the reaction nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ at SPS energies |
| Author(s) | Morfín, J G ; Bertrand, D ; Bertrand-Coremans, G ; Blaes, R ; Bullock, F W ; De Unamuno, S ; Dewit, M ; Escoubés, B ; Fett, E ; Haatuft, A ; Halsteinslid, A ; Jones, T W ; Myklebost, K ; Olsen, J M ; Petitjean, P ; Pohl, M ; Rahimi, F ; Ratoff, P N ; Sacton, J ; Vilain, P ; Weerts, H ; Welch, L C |
| Affiliation | (III Phys Inst, RWTH Aachen, Aachen, West Germany) |
| Publication | 1979 |
| In: | Phys. Lett. B 84 (1979) 354-6 |
| DOI | 10.1016/0370-2693(79)90057-1 |
| Subject category | Particle Physics - Phenomenology |
| Accelerator/Facility, Experiment | CERN SPS |
| Abstract | Candidates for the purely leptonic process nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ have been searched for in the bubble chamber Gargamelle exposed to the CERN-SPS antineutrino wide-band beam. No single e/sup -/, of energy greater than 1 GeV, was found in a total of 230000 pictures, corresponding to 7400 charged current events. This leads to an upper limit for the observed cross section of sigma /sub obs/<1.6*10/sup -42/(E/sub nu //GeV) cm/sup 2/ (90% C.L.). Interpretation of this value in terms of the standard Weinberg-Salam model yields an upper limit to the mixing parameter sin/sup 2/ theta /sub W/<0.39 at 90% C.L. (5 refs). |