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  1. MAR



    Particle Physics Seminar

    "Evaluation of reactor neutrino flux: issues and uncertainties"

    Presented by Professor Petr Vogel, Caltech

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, March 30, 2017, 3:00 pm

    Hosted by: 'Xin Qian'

    Evaluation of the reactor antineutrino flux and spectrum is an essential ingredient of their application in the neutrino oscillation studies. Two anomalies, i.e. discrepancies between the observed and expected count rates, are widely discussed at the present time. The total rate is about 6% lower than the expectation at all distances > 10 m from the reactor. And there is a shoulder (often referred to as "bump") at neutrino energies 5-7 MeV, not predicted in the calculated spectrum. I review the ways the flux and spectrum is evaluated. I argue that far reaching conclusions based on these anomalies should await a thorough understanding of the uncertainties of the spectrum, and point out possible standard physics sources of the anomalies.

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