Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment - INSPIRE

Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment

RENO

Collaboration

•

J.K. Ahn
(
- Pusan Natl. U.
)

Apr, 2012

6 pages

Published in:

Phys.Rev.Lett. 108 (2012) 191802

e-Print:

1204.0626 [hep-ex]

DOI:

10.1103/PhysRevLett.108.191802

PDG: sin

^2(\theta _{13})

Experiments:

RENO

View in:

ADS Abstract Service

reference search2,552 citations

Citations per year

Abstract: (arXiv)

The RENO experiment has observed the disappearance of reactor electron antineutrinos, consistent with neutrino oscillations, with a significance of 4.9 standard deviations. Antineutrinos from six 2.8 GW

_{th}

reactors at the Yonggwang Nuclear Power Plant in Korea, are detected by two identical detectors located at 294 m and 1383 m, respectively, from the reactor array center. In the 229 day data-taking period between 11 August 2011 and 26 March 2012, the far (near) detector observed 17102 (154088) electron antineutrino candidate events with a background fraction of 5.5% (2.7%). The ratio of observed to expected numbers of antineutrinos in the far detector is

0.920 \pm 0.009({\rm stat.}) \pm 0.014({\rm syst.})

. From this deficit, we determine

\sin^2 2 \theta_{13} = 0.113 \pm 0.013({\rm stat.}) \pm 0.019({\rm syst.})

based on a rate-only analysis.

Note:

The Chi^2 fit result on theta_13 is updated based on use of the constrained global normalization parameter within the the absolute reactor neutrino flux uncertainty of 2.5%. The systematic error is enhanced to lower the significance to 4.9 sigma. The updated Li/He background resulted in a new fit value of theta_13

28.50.Hw
14.60.Pq
13.15.+g
29.40.-n
neutrino: oscillation
antineutrino/e: flux
neutrino: nuclear reactor
antineutrino: path length
scintillation counter: liquid
gadolinium: admixture

References(34)

Figures(4)

[1]

Zh. Eksp. Theo

B. Pontecorvo

- Fizika 34 (1957) 247

[2]

Remarks on the unified model of elementary particles

- Prog.Theor.Phys. 28 (1962) 870-880,
•
DOI:
- 10.1143/PTP.28.870

[3]

Limits on neutrino oscillations from the CHOOZ experiment

CHOOZ

Collaboration

•

M. Apollonio
(
- INFN, Trieste and
- Trieste U.
)

et al.

- Phys.Lett.B 466 (1999) 415-430,
- Phys. Lett. B472 (2000) 434. (Erratum)
•
e-Print:
- hep-ex/9907037
•
DOI:
- 10.1016/S0370-2693(99)01072-2

[3]

Search for neutrino oscillations on a long baseline at the CHOOZ nuclear power station

CHOOZ

Collaboration

•

M. Apollonio
(
- INFN, Trieste and
- Trieste U.
)

et al.

- Eur.Phys.J.C 27 (2003) 331-374
•
e-Print:
- hep-ex/0301017
•
DOI:
- 10.1140/epjc/s2002-01127-9

[4]

Search for neutrino oscillations at the Palo Verde nuclear reactors

F. Boehm
(
- Caltech
)
,
J. Busenitz
(
- Alabama U.
)
,
B. Cook
(
- Caltech
)
,
G. Gratta
(
- Stanford U., Phys. Dept.
)
,
H. Henrikson
(
- Caltech
)

et al.

- Phys.Rev.Lett. 84 (2000) 3764-3767
•
e-Print:
- hep-ex/9912050
•
DOI:
- 10.1103/PhysRevLett.84.3764

[5]

New Constraints on Muon-Neutrino to Electron-Neutrino Transitions in MINOS

MINOS

Collaboration

•

P. Adamson
(
- Fermilab
)

et al.

- Phys.Rev.D 82 (2010) 051102
•
e-Print:
- 1006.0996
•
DOI:
- 10.1103/PhysRevD.82.051102

[6]

An Improved search for nu(mu) ---> nu(e) oscillation in a long-baseline accelerator experiment

K2K

Collaboration

•

S. Yamamoto
(
- Kyoto U.
)

et al.

- Phys.Rev.Lett. 96 (2006) 181801
•
e-Print:
- hep-ex/0603004
•
DOI:
- 10.1103/PhysRevLett.96.181801

[7]

Atmospheric neutrino oscillation analysis with sub-leading effects in Super-Kamiokande I, II, and III

Super-Kamiokande

Collaboration

•

R. Wendell
(
- Duke U.
)

et al.

- Phys.Rev.D 81 (2010) 092004
•
e-Print:
- 1002.3471
•
DOI:
- 10.1103/PhysRevD.81.092004

[8]

Low Energy Threshold Analysis of the Phase I and Phase II Data Sets of the Sudbury Neutrino Observatory

SNO

Collaboration

•

B. Aharmim
(
- Laurentian U.
)

et al.

- Phys.Rev.C 81 (2010) 055504
•
e-Print:
- 0910.2984
•
DOI:
- 10.1103/PhysRevC.81.055504

[9]

Constraints on $\theta_{13}$ from A Three-Flavor Oscillation Analysis of Reactor Antineutrinos at KamLAND

KamLAND

Collaboration

•

A. Gando
(
- Tohoku U.
)

et al.

- Phys.Rev.D 83 (2011) 052002
•
e-Print:
- 1009.4771
•
DOI:
- 10.1103/PhysRevD.83.052002

[10]

Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

T2K

Collaboration

•

K. Abe
(
- Tokyo U., ICRR
)

et al.

- Phys.Rev.Lett. 107 (2011) 041801
•
e-Print:
- 1106.2822
•
DOI:
- 10.1103/PhysRevLett.107.041801

[11]

Improved search for muon-neutrino to electron-neutrino oscillations in MINOS

MINOS

Collaboration

•

P. Adamson
(
- Fermilab
)

et al.

- Phys.Rev.Lett. 107 (2011) 181802
•
e-Print:
- 1108.0015
•
DOI:
- 10.1103/PhysRevLett.107.181802

[12]

Indication of Reactor $\bar{\nu}_e$ Disappearance in the Double Chooz Experiment

Double Chooz

Collaboration

•

Y. Abe
(
- Tokyo Inst. Tech.
)

et al.

- Phys.Rev.Lett. 108 (2012) 131801
•
e-Print:
- 1112.6353
•
DOI:
- 10.1103/PhysRevLett.108.131801

[13]

Evidence of $\theta_{13}$ >0 from global neutrino data analysis

G.L. Fogli
(
- Bari U. and
- INFN, Bari
)
,
E. Lisi
(
- INFN, Bari
)
,
A. Marrone
(
- Bari U. and
- INFN, Bari
)
,
A. Palazzo
(
- Munich, Tech. U., Universe
)
,
A.M. Rotunno
(
- Bari U.
)

- Phys.Rev.D 84 (2011) 053007
•
e-Print:
- 1106.6028
•
DOI:
- 10.1103/PhysRevD.84.053007

[14]

Where we are on $\theta_{13}$ : addendum to `Global neutrino data and recent reactor fluxes: status of three-flavour oscillation parameters'

Thomas Schwetz
(
- Heidelberg, Max Planck Inst.
)
,
Mariam Tortola
(
- Valencia U., IFIC
)
,
J.W.F. Valle
(
- Valencia U., IFIC
)

- New J.Phys. 13 (2011) 109401
•
e-Print:
- 1108.1376
•
DOI:
- 10.1088/1367-2630/13/10/109401

[15]

Observation of electron-antineutrino disappearance at Daya Bay

Daya Bay

Collaboration

•

F.P. An
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 108 (2012) 171803
•
e-Print:
- 1203.1669
•
DOI:
- 10.1103/PhysRevLett.108.171803

[16]

Measurement of the Neutrino Mass Splitting and Flavor Mixing by MINOS

MINOS

Collaboration

•

P. Adamson
(
- Fermilab
)

et al.

- Phys.Rev.Lett. 106 (2011) 181801
•
e-Print:
- 1103.0340
•
DOI:
- 10.1103/PhysRevLett.106.181801

[17]

RENO: An Experiment for Neutrino Oscillation Parameter $\theta_{13}$ Using Reactor Neutrinos at Yonggwang

RENO

Collaboration

•

J.K. Ahn
(
- Pusan Natl. U.
)

et al.

e-Print:
- 1003.1391

[18]

Construction and Properties of Acrylic Vessels in the RENO Detector, in preparation

K.S. Park

[19]

Production and Optical Properties of Gd-loaded Liquid Scintillator for the RENO Neutrino Detector, in preparation

J.S. Park

[20]

Muon induced production of radioactive isotopes in scintillation detectors

et al.

- Astropart.Phys. 14 (2000) 33-47
•
DOI:
- 10.1016/S0927-6505(00)00103-1

[21]

Energy levels of light nuclei A=8,9,10

et al.

- Nucl.Phys.A 745 (2004) 155-362
•
DOI:
- 10.1016/j.nuclphysa.2004.09.059

[22]

Production of Radioactive Isotopes through Cosmic Muon Spallation in KamLAND

KamLAND

Collaboration

•

S. Abe
(
- RCNS, Sendai
)

et al.

- Phys.Rev.C 81 (2010) 025807
•
e-Print:
- 0907.0066
•
DOI:
- 10.1103/PhysRevC.81.025807

[23]

Angular distribution of neutron inverse beta decay, anti-neutrino(e) + p ---> e+ + n

P. Vogel
(
- Caltech
)
,
John F. Beacom
(
- Caltech
)

- Phys.Rev.D 60 (1999) 053003
•
e-Print:
- hep-ph/9903554
•
DOI:
- 10.1103/PhysRevD.60.053003

[24]

EPRI 2001.1001470, Palo Alto, CA. (2001)

S.F.E. Tournu

1-25 of 34
1
2
25 / page