Publicación:
Measurement of Neutral-Current K+ Production by Neutrinos using MINERvA
Measurement of Neutral-Current K+ Production by Neutrinos using MINERvA
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Fecha
2017
Autores
Marshall, CM
Aliaga, L
Altinok, O
Bellantoni, L
Bercellie, A
Betancourt, M
Bodek, A
Bravar, A
Cai, T
Carneiro, MF
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American Physical Society
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Abstracto
Neutral-current production of Kþ by atmospheric neutrinos is a background in searches for the proton
decay p → Kþν¯. Reactions such as νp → νKþΛ are indistinguishable from proton decays when the
decay products of the Λ are below detection threshold. Events with Kþ are identified in MINERvA by
reconstructing the timing signature of a Kþ decay at rest. A sample of 201 neutrino-induced neutral-current
Kþ events is used to measure differential cross sections with respect to the Kþ kinetic energy, and the nonKþ hadronic visible energy. An excess of events at low hadronic visible energy is observed relative to the
prediction of the NEUT event generator. Good agreement is observed with the cross section prediction of the
GENIE generator. A search for photons from π0 decay, which would veto a neutral-current Kþ event in a
proton decay search, is performed, and a 2σ deficit of detached photons is observed relative to the GENIE
prediction.
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Palabras clave
Forecasting,
Kinetic energy,
Kinetics