NEOS Data and the Origin of the 5 MeV Bump in the Reactor Antineutrino Spectrum

Huber, Patrick

doi:10.1103/physrevlett.118.042502

Title: NEOS Data and the Origin of the 5 MeV Bump in the Reactor Antineutrino Spectrum

Journal Article · Fri Jan 27 00:00:00 EST 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.118.042502· OSTI ID:1536475

Huber, Patrick ^[1]

Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center of Neutrino Physics

We perform a combined analysis of recent NEOS and Daya Bay data on the reactor antineutrino spectrum. This analysis includes approximately 1.5 million antineutrino events, which is the largest neutrino event sample analyzed to date. We use a double ratio which cancels flux model dependence and related uncertainties as well as the effects of the detector response model. We find at 3–4 standard deviation significance level, that plutonium-239 and plutonium-241 are disfavored as the single source for the so-called 5 MeV bump. This analysis method has general applicability and, in particular, with higher statistics data sets, will be able to shed significant light on the issue of the bump. With some caveats, this should also allow us to improve the sensitivity for sterile neutrino searches in NEOS.

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Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0009973

OSTI ID:: 1536475

Alternate ID(s):: OSTI ID: 1341321

Journal Information:: Physical Review Letters, Vol. 118, Issue 4; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 47 works

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