Testing nonstandard neutrino properties with a Mössbauer oscillation experiment

Abstract

If the neutrino analogue of the Mössbauer effect, namely, recoiless emission and resonant capture of neutrinos is realized, one can study neutrino oscillations with much shorter baselines and smaller source/detector size when compared to conventional experiments. In this work, we discuss the potential of such a Mössbauer neutrino oscillation experiment to probe nonstandard neutrino properties coming from some new physics beyond the standard model. We investigate four scenarios for such new physics that modify the standard oscillation pattern. We consider the existence of a light sterile neutrino that can mix withν e , the existence of a Kaluza-Klein tower of sterile neutrinos that can mix with the flavor neutrinos in a model with large flat extra dimensions, neutrino oscillations with nonstandard quantum decoherence and mass varying neutrinos, and discuss to which extent one can constrain these scenarios. We also discuss the impact of such new physics on the determination of the standard oscillation parameters.

Dissipative effect in long baseline neutrino experiments

“…This is explained through the neutrino appearance at this region where a non-usual appearance occurs due to the MSW effect and the decoherence effect described by 31 . In the same way, 21 also decreases the values for survival probability to high energy. In this case, as P ν μ ν μ + P ν μ ν e + P ν μ ν τ = 1 and there is no new neutrino appearance at all (Fig.…”

“…In this case, as P ν μ ν μ + P ν μ ν e + P ν μ ν τ = 1 and there is no new neutrino appearance at all (Fig. 4), we can just conclude that there is an interesting transition to P ν μ ν τ at this region if 21 has high enough magnitude.…”

“…Then 32 would only be responsible for this decrease in the oscillation amplitude. The decoherence parameters 21 and 31 appear in terms that depend on α 2 or α sin θ 13 , so they are subdominant in this oscillation regime.…”

“…From Fig. 4, we can see the consequences that 21 and 31 bring to the survival probability. In this case, 31 just changes the behavior at the resonance region where the survival probability decreases its value.…”

“…The success of the model opened the opportunity for testing other kinds of effects in oscillation experiments [14][15][16][17][18][19][20][21]. So, considering the precision level that the next generation of experiments will achieve, the limits on each usual neutrino oscillation parameter will be very stringent and the space for new physics may also be lessened.…”