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The atmospheric neutrino background for proton decay via p -> e(+)pi(0) in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14x10(5) neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single pi(0) production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p -> e(+)pi(0) background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63(-0.33)(+0.42)(stat)(-0.51)(+0.45)(syst)(megaton-year)(-1). This result is also relevant to possible future, megaton-scale water Cherenkov detectors.

Experimental study of the atmospheric neutrino backgrounds for p -> e(+)pi(0) searches in water Cherenkov detectors / S., M., J. L., A., S., A., S., A., J., A., K., A., R., A., F., B., H., B., H., B., A., B., S., B., J., B., J., B.C., D., C., J., C., C., C., A., C., S. M., C., K. O., C., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 77:(2008). [10.1103/physrevd.77.032003]

Experimental study of the atmospheric neutrino backgrounds for p -> e(+)pi(0) searches in water Cherenkov detectors

DORE, Ubaldo;LOVERRE, Pier Ferruccio;
2008

Abstract

The atmospheric neutrino background for proton decay via p -> e(+)pi(0) in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14x10(5) neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single pi(0) production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p -> e(+)pi(0) background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63(-0.33)(+0.42)(stat)(-0.51)(+0.45)(syst)(megaton-year)(-1). This result is also relevant to possible future, megaton-scale water Cherenkov detectors.
2008
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental study of the atmospheric neutrino backgrounds for p -> e(+)pi(0) searches in water Cherenkov detectors / S., M., J. L., A., S., A., S., A., J., A., K., A., R., A., F., B., H., B., H., B., A., B., S., B., J., B., J., B.C., D., C., J., C., C., C., A., C., S. M., C., K. O., C., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 77:(2008). [10.1103/physrevd.77.032003]
01a Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/91542
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