Diagnosing the reactor antineutrino anomaly with global antineutrino flux data
We have examined the impact of new Daya Bay, Double Chooz, and RENO measurements on global fits of reactor antineutrino flux data to a variety of hypotheses regarding the origin of the reactor antineutrino anomaly. In comparing RENO and Daya Bay measurements of inverse beta decay (IBD) yield versus 239Pu fission fraction, we find differing levels of precision in measurements of time-integrated yield and yield slope, but similar central values, leading to modestly enhanced isotopic IBD yield measurements in a joint fit of the two datasets. In the absence of sterile neutrino oscillations, global fits to all measurements now provide 3σ preference for incorrect modeling of specific fission isotopes over common mis-modeling of all beta-converted isotopes. If sterile neutrino oscillations are considered, global IBD yield fits provide no substantial preference between oscillation-including and oscillation-excluding hypotheses: hybrid models containing both sterile neutrino oscillations and incorrect 235U or 239Pu flux predictions are favored at only 1σ-2σ with respect to models where 235U, 238U, and 239Pu are assumed to be incorrectly predicted.
- Research Organization:
- Illinois Institute of Technology, Chicago, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- SC0008347; XDA 10010100; 11835013
- OSTI ID:
- 1507191
- Alternate ID(s):
- OSTI ID: 1595060
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 99 Journal Issue: 7; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
New realization of the conversion calculation for reactor antineutrino fluxes
|
journal | September 2019 |
Similar Records
Prospects for improved understanding of isotopic reactor antineutrino fluxes
Improved measurement of the reactor antineutrino flux at Daya Bay