A STUDY ON SINGLE PHOTON PRODUCTION AT s**(1/2) = 54-GeV TO 61.4-GeV
Aug, 19896 pages
Published in:
- Phys.Lett.B 232 (1989) 431-436
- Published: 1989
Report number:
- KEK-PREPRINT-89-68,
- TMUP-HEL-89-21,
- OULNS-89-07,
- KOBE-HEP-89-04,
- HUPD-8910,
- KUNS-983
Experiments:
- KEK-TE-001,
- KEK-VENUS
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Abstract: (Elsevier)
A study of single photon events, produced in association with light neutrinos or other weakly interacting neutral particlaes in e + e − collisions, has been performed at √ s =54.0–61.4 GeV with the VENUS detector at TRISTAN. No anomalous signal has been observed in a data sample corresponding to an integrated luminosity of 28.2 pb −1 . This result indicates that the upper limit on the number of light neutrinos, N ν , is 11 (15) at a 90 (95)% confidence level. Combining this with published results from other e + e − experiments, the number of light neutrinos is limited to N ν <3.9(4.8) at the 90 (95)% confidence level. Limits are also placed on the mass of supersymmetric particles.- electron positron: colliding beams
- electron positron: annihilation
- photon: electroproduction
- neutrino: associated production
- neutrino: flavor
- sparticle: mass
- VENUS
- experimental results
- KEK TRISTAN Stor
- electron positron --> neutrino antineutrino photon
References(11)
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