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Decoherence in Neutrino Oscillation at the ESSnuSB Experiment
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abstract
Neutrino oscillation experiments provide a unique window in exploring several new physics scenarios beyond the standard three flavour. One such scenario is quantum decoherence in neutrino oscillation which tends to destroy the interference pattern of neutrinos reaching the far detector from the source. In this work, we study the decoherence in neutrino oscillation in the context of the ESSnuSB experiment. We consider the energy-independent decoherence parameter and derive the analytical expressions for P$_{\mu e}$ and P$_{\mu \mu}$ probabilities in vacuum. We have computed the capability of ESSnuSB to put bounds on the decoherence parameters namely, $\Gamma_{21}$ and $\Gamma_{32}$ and found that the constraints on $\Gamma_{21}$ are competitive compared to the DUNE bounds and better than the most stringent LBL ones from MINOS/MINOS+. We have also investigated the impact of decoherence on the ESSnuSB measurement of the Dirac CP phase $\delta_{\rm CP}$ and concluded that it remains robust in the presence of new physics.
Forward citations
Cited by 3 Pith papers
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Impact of different neutrino decoherence formalisms at the future long-baseline Experiments
Two bases for the neutrino decoherence matrix yield identical vacuum probabilities at small Gamma but diverge at large Gamma or with strong matter effects, altering chi-squared sensitivities at DUNE and P2SO.
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Quantum Decoherence at ESSnuSB Experiment
ESSnuSB would set decoherence parameter constraints better than MINOS and comparable to DUNE, with robust CP sensitivity.
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ESSnuSB status
ESSnuSB, a proposed second-maximum neutrino beam experiment, projects 5-sigma CP violation discovery over 72% of the delta_CP range and sub-8-degree delta_CP precision after 10 years.
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