LSND

The Liquid Scintillator Neutrino Detector (LSND) was a scintillation counter at Los Alamos National Laboratory that measured the number of neutrinos being produced by an accelerator neutrino source. The LSND project was created to look for evidence of neutrino oscillation, and its results conflict with the standard model expectation of only three neutrino flavors, when considered in the context of other solar and atmospheric neutrino oscillation experiments. Cosmological data bound the mass of the sterile neutrino to m_s < 0.26eV (0.44eV) at 95% (99.9%) confidence limit, excluding at high significance the sterile neutrino hypothesis as an explanation of the LSND anomaly. [S. Dodelson, A. Melchiorri, A. Slosar, Phys. Rev. Lett. 97 (2006) 04301, http://xxx.lanl.gov/abs/astro-ph/0511500] The controversial LSND result was tested by the MiniBooNE experiment at Fermilab, which refuted a simple 2-neutrino oscillation interpretation of the LSND result.

The detector consisted of a tank filled with 167 tons (50000 gallons) of mineral oil and 14 pounds of b-PDB (butyl-phenyl-bipheny-oxydiazole) organic scintillator material. Cherenkov light emitted by particle interactions was detected by an array of 1220 photomultiplier tubes. The experiment collected data from 1993 to 1998.

References

elected papers

*Athanassopoulos "et al", "The Liquid Scintillator Neutrino Detector and LAMPF Neutrino Source", Nucl. Instrum. Meth. A388 (1997) 149-172. [http://arxiv.org/abs/nucl-ex/9605002 nucl-ex/9605002]

External links

* [http://www.lanl.gov/news/releases/archive/01-122.shtml LSND strengthens evidence for neutrino oscillations]
* [http://www.nu.to.infn.it/exp/all/lsnd/ LSND scientific publications]
* [http://www.slac.stanford.edu/spires/find/experiments/www2?expt=LAMPF-1173 LSND scientific publications, SPIRES database]