KARMEN: Neutrino oscillation limits and new results with the upgrade
✍ Scribed by Klaus Eitel
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 395 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0920-5632
No coin nor oath required. For personal study only.
✦ Synopsis
The neutrino experiment KARMEN is situated at the beam stop neutrino source ISIS which provides ~~'9, ve's and fir's from the ?r+-Cc+-decay at rest. The oscillation channels up+ Y, and iirj se are investigated with a 56 t liquid scintillation calorimeter. No evidence for oscillations could be found with KARMEN, resulting in 96% CL exclusion limits of sin'(20) < 9.5 -lo-' (-ufi-) i&) and sin'(20) < 4.0 + low2 (v~-v=) for Am2 > 100eV". In 1996, the KAFMEN experiment has been upgraded by an additional veto counting system with a total coverage of 300m'. The new system allows the identification of cosmic muons in the vicinity of the detector. Vetoing these muons suppresses energetic neutrons from deep inelastic scattering of muons as well as from p-capture by a factor of 40. Up to 1996, these neutrons represented the main badcgound for Pi-) zie oscillation search. The experimental sensitivity for Ok--, P, will be significantly enhanced towards sin2(20) N 1.0 -lo-" after a further measuring period of 2-3 years.