Speaker
Mr
Aleksei Lokhov
(Institute for Nuclear Research RAS)
Description
The method of quasi-optimal weights is applied to constructing (quasi-)optimal criteria for various anomalous contributions in experimental spectra [1, 2]. Anomalies in the spectra could indicate physics beyond the Standard model (additional interactions and neutrino flavours, Lorenz violation etc.).
In particular the cumulative tritium beta-decay spectrum (for instance, in Troitsk-nu-mass, Mainz Neutrino Mass and KATRIN experiments) is analysed using the derived special criteria. Using the power functions we show that the derived quasi-optimal criteria are efficient statistical instruments for detecting the anomalous contributions in the spectra.
As a realistic example, the constructed criteria are applied to search for additional massive neutrino in the Troitsk-nu-mass data.
1) A.V. Lokhov, F.V. Tkachov, P.S. Trukhanov, A systematic search for step-like anomalies in the tritium beta-decay spectrum in the Troitsk-nu-mass experiment, Nucl.Phys. A897 (2013) 218-228;
2) A.V. Lokhov, F.V. Tkachov, P.S. Trukhanov, Application of quasi-optimal weights to searches of anomalies. Statistical criteria for step-like anomalies in cumulative spectra, Nucl.Instrum.Meth. A686 (2012) 162-167.
Primary authors
Mr
Aleksei Lokhov
(Institute for Nuclear Research RAS)
Dr
Fyodor Tkachov
(Institute for Nuclear Research RAS)
