Prompt nu(tau) background in wide band nu(mu) beams

被引：45
|
作者：
VandeVyver, B
机构：
[1] Inter-Univ. Inst. High Energies, Brussels
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1997年 / 385卷 / 01期
关键词：
tau-neutrino; neutrino oscillations; neutrino beams; Drell-Yan process;
D O I：
10.1016/S0168-9002(96)00940-0
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
To estimate the prompt background for nu(mu) --> nu(tau) oscillation search in the Chorus and Nomad experiments, two possible sources of tau-neutrinos were considered. The first is the production and (semi-)leptonic decay of heavy flavour mesons. Secondly, the Drell-Yan mechanism can lead to tau-pairs. It is shown that this last contribution is negligible. However, the decay of D-s(+/-) mesons to tau(+/-)nu(tau) gives rise to 3.3 x 10(-6) nu(tau) charged-current interactions per nu(mu) charged-current interaction. Over the course of the Chorus experiment, this corresponds to 0.1 detected nu(tau) charged-current events. This value is an upper limit and the actual background might be smaller by a factor of 2. However, it should carefully be taken into account, especially in view of future experiments, wishing to explore smaller values of mixing.
引用
收藏
页码：91 / 99
页数：9
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