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Search for coherent charged pion production in neutrino-carbon interactions
M Hasegawa1, E Aliu, S Andringa
1Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Physical Review Letters
|December 31, 2005
Summary
Researchers searched for coherent pion production from muon neutrinos but found no evidence. An upper limit was set for this interaction, providing the first experimental constraint in this energy range.
Area of Science:
- Particle Physics
- High-Energy Physics
- Neutrino Physics
Background:
- Coherent pion production is a rare neutrino interaction.
- Understanding this process is crucial for neutrino physics and nuclear models.
Purpose of the Study:
- To search for charged-current coherent pion production induced by muon neutrinos.
- To establish the first experimental upper limit for this cross-section ratio.
Main Methods:
- Utilized data from the K2K long-baseline neutrino oscillation experiment.
- Employed a fully active scintillator detector to analyze neutrino interactions.
- Searched for specific signatures of coherent pion production.
Main Results:
- No evidence for coherent pion production was observed.
- An upper limit of was set on the cross-section ratio at 90% confidence level.
Conclusions:
- This study provides the first experimental limit for coherent charged pion production in the few-GeV energy region.
- The results constrain theoretical models of neutrino- pion interactions.
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