Solar Neutrino Limits on Decoherence

Abstract

The solar neutrino flux arrives at Earth as an incoherent admixture of mass eigenstates, and then solar neutrino detection constitute a blind probe to the oscillation pattern of the neutrino flavour conversion. Consequently, it is also impossible to probe, in a model independent approach, any new physics that leads to an enhancement of decoherence during the neutrino evolution, an effect that is present for instance in Open Quantum System formalism. However, such mechanism can also induce changes between mass eigenstates if an energy interchange between the neutrino subsystem and the reservoir is not explicitly forbidden. In this work the conversion probabilities between mass eigenstates in an Open Quantum System are calculated, and limits are stablished for these kind of transitions. We present our results in a pedagogical way, pointing out how far the analysis can go without any assumption on the neutrino conversion physics inside the Sun, before performing the full calculations. We obtain as limits for the decoherence parameters the values of ${\Gamma }_3<6.5\times 10^{-19}$ eV and ${\Gamma }_8<7.1\times 10^{-19}$ eV at 3$\sigma$.

24 pages, 4 figures

References in corpus (6)

• Observation of Coherent Elastic Neutrino-Nucleus Scattering
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• A new Generation of Standard Solar Models
• Improved measurements of the neutrino mixing angle ${\theta }_{13}$ with the Double Chooz detector
• Probing non-standard decoherence effects with solar and KamLAND neutrinos
• Decoherence, matter effect, neutrino hierarchy signature in long baseline experiments

Cited by in corpus (7)

• Neutrino oscillation bounds on quantum decoherence
• Neutrino signals of lightcone fluctuations resulting from fluctuating space-time
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Independent determination of the Earth's orbital parameters with solar neutrinos in Borexino
• Decoherence in Neutrino Oscillation at the ESSnuSB Experiment
• Study of quantum decoherence at Protvino to ORCA experiment
• Inference finds consistency between a neutrino flavor evolution model and Earth-based solar neutrino measurements