Neutral-to-charged current events ratio in atmospheric neutrinos and neutrino oscillations
نویسنده
چکیده
The atmospheric neutrinos produce isolated neutral pions (πevents) mainly in the neutral current interactions. We propose to study the ratios involving π-events and the events induced mainly by the charged currents. This minimizes uncertainties related to the original neutrino fluxes, and in certain cases, also to the cross-sections. Experimental study of these ratios will allow one to check the oscillation solution of the atmospheric neutrino problem and to identify the channel of oscillations. Illustrative analysis of existing data is presented.
منابع مشابه
One pion events by atmospheric neutrinos: A three flavor analysis
We study the one-pion events produced via neutral current (NC) and charged current (CC) interactions by the atmospheric neutrinos. We analyze the ratios of these events in the framework of oscillations between three neutrino flavors. The ratios of the CC events induced by νe to that of the NC events and a similar ratio defined with νμ help us in distinguishing the different regions of the neutr...
متن کاملAtmospheric neutrino results from Super-Kamiokande and Kamiokande Evidence for oscillations
Cosmic ray interactions in the atmosphere produce neutrinos. The prediction of the absolute ux has an uncertainty of 20%. However, the avor ratio of the atmospheric neutrino ux, ( + )=( e+ e), has been calculated to an accuracy of better than 5% in a broad energy range from 0.1 GeV to higher than 10 GeV. The calculated ux ratio has a value of about 2 for energies < 1GeV and increases with in...
متن کاملStudy of Inclusive Multi-Ring Events from Atmospheric Neutrinos
The current analysis of atmospheric neutrinos by the Super-Kamiokande Collaboration is based only on fully-contained one-ring events and partially contained events. We show that the up-down ratio of fully-contained, inclusive, multi-ring events gives an independent test of the atmospheric neutrino anomaly, without the need for particle identification. Moreover, this class of events is rich in n...
متن کاملTests of electron flavor conservation with the Sudbury Neutrino Observatory.
We analyze tests of electron flavor conservation that can be performed at the Sudbury Neutrino Observatory ~SNO!. These tests, which utilize B solar neutrinos interacting with deuterium, measure ~1! the shape of the recoil electron spectrum in charged-current ~CC! interactions ~the CC spectrum shape!, and ~2! the ratio of the number of charged-current to neutral current ~NC! events ~the CC/NC r...
متن کاملAtmospheric neutrinos and discovery of neutrino oscillations
Neutrino oscillation was discovered through studies of neutrinos produced by cosmic-ray interactions in the atmosphere. These neutrinos are called atmospheric neutrinos. They are produced as decay products in hadronic showers resulting from collisions of cosmic rays with nuclei in the atmosphere. Electron-neutrinos and muon-neutrinos are produced mainly by the decay chain of charged pions to mu...
متن کامل