Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10368779" target="_blank" >RIV/00216208:11320/17:10368779 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1674-1137/41/1/013002" target="_blank" >http://dx.doi.org/10.1088/1674-1137/41/1/013002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1674-1137/41/1/013002" target="_blank" >10.1088/1674-1137/41/1/013002</a>

Result language

angličtina

Original language name

Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay

Original language description

A new measurement of the reactor antineutrino flux and energy spectrum by the Daya Bay reactor neutrino experiment is reported. The antineutrinos were generated by six 2.9 GW(th) nuclear reactors and detected by eight antineutrino detectors deployed in two near (560 m and 600 m flux-weighted baselines) and one far (1640 m flux-weighted baseline) underground experimental halls. With 621 days of data, more than 1.2 million inverse beta decay (IBD) candidates were detected. The IBD yield in the eight detectors was measured, and the ratio of measured to predicted flux was found to be 0.946 +/- 0.020 (0.992 +/- 0.021) for the Huber+Mueller (ILL+Vogel) model. A 2.9 sigma deviation was found in the measured IBD positron energy spectrum compared to the predictions. In particular, an excess of events in the region of 4-6 MeV was found in the measured spectrum, with a local significance of 4.4 sigma. A reactor antineutrino spectrum weighted by the IBD cross section is extracted for model-independent predictions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/LTT17021" target="_blank" >LTT17021: Reactor neutrino experiments Daya Bay and JUNO</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chinese Physics C

ISSN

1674-1137

e-ISSN

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Volume of the periodical

41

Issue of the periodical within the volume

1

Country of publishing house

CN - CHINA

Number of pages

36

Pages from-to

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UT code for WoS article

000393254200002

EID of the result in the Scopus database

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