Neutrino-Proton Elastic Scattering Detection in Scintillators

Physics

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Scientific paper

We propose that neutrino-proton elastic scattering, ν + p arrow ν + p, can be used for the detection of supernova neutrinos. Though the proton recoil kinetic energy spectrum is soft, with Tp ≃ 2 E_ν^2/M_p, and the scintillation light output from slow, heavily ionizing protons is quenched, the yield above a realistic threshold is nearly as large as that from barνe + p arrow e^+ + n. In addition, the measured proton spectrum is related to the incident neutrino spectrum, which solves a long-standing problem of how to separately measure the total energy release and temperature of ν_μ, ν_τ, barν_μ, and barν_τ. The ability to detect this signal would give detectors like KamLAND and Borexino a crucial and unique role in the quest to detect supernova neutrinos

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