Measurement of Neutral-Current K+ Production by Neutrinos using MINERvA

• Autores: Marshall, CM, Aliaga, L, Altinok, O, Bellantoni, L, Bercellie, A, Betancourt, M, Bodek, A, Bravar, A, Cai, T, Carneiro, MF, da Motta, H, Dytman, SA, Diaz, GA, Dunkman, M, Eberly, B, Endress, E, Felix, J, Fields, L, Fine, R, Gago, AM, Galindo, R, Gallagher, H, Ghosh, A, Golan, T, Gran, R, Harris, DA, Higuera, A, Hurtado, K, Kleykamp, J, Kordosky, M, Le, T, Maher, E, Manly, S, Mann, WA, Caicedo, DAM, McFarland, KS, McGivern, CL, McGowan, AM, Messerly, B, Miller, J, Mislivec, A, Morfin, JG, Mousseau, J, Naples, D, Nelson, JK, Norrick, A, Nuruzzaman, Paolone, V, Patrick, CE, Perdue, GN, Ramirez, MA, Ransome, RD, Ray, H, Ren, L, Rimal, D, Rodrigues, PA, Ruterbories, D, Schmitz, DW, Salinas, CJS, Sultana, M, Falero, SS, Valencia, E, Walton, T, Wolcott, J, Wospakrik, M, Yaeggy, B, Zhang, D
• Formato: artículo
• Fecha de Publicación: 2017
• Institución: Consejo Nacional de Ciencia Tecnología e Innovación
• Repositorio: CONCYTEC-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.concytec.gob.pe:20.500.12390/1100
• Enlace del recurso: https://hdl.handle.net/20.500.12390/1100; https://doi.org/10.1103/PhysRevLett.119.011802
• Nivel de acceso: acceso abierto
• Materia: Forecasting; Kinetic energy; Kinetics

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.