Reactor Experiment for Neutrino Oscillation

Short description: Neutrino oscillation experiment in South Korea

"RENO" redirects here. For other uses, see Reno (disambiguation).

The Reactor Experiment for Neutrino Oscillation (RENO) is a short baseline reactor neutrino oscillation experiment in South Korea. The experiment was designed to either measure or set a limit on the neutrino mixing matrix parameter θ13, a parameter responsible for oscillations of electron neutrinos into other neutrino flavours. RENO has two identical detectors, placed at distances of 294 m and 1383 m, that observe electron antineutrinos produced by six reactors at the Hanbit Nuclear Power Plant (the old name: the Yeonggwang Nuclear Power Plant) in Korea.

Each detector consists of 16.5 t of gadolinium-doped liquid scintillator (LAB), surrounded by an additional 450 tons of buffer, veto, and shielding liquids.[1]: 6

On 3 April 2012, with some corrections on 8 April, the RENO collaboration announced a 4.9σ[broken anchor] observation of θ13 ≠ 0, with

sin22θ13=0.113±0.013(stat.)±0.019(syst.)[2][3]

This measurement confirmed a similar result announced by the Daya Bay Experiment three weeks before and is consistent with earlier, but less significant results by T2K, MINOS and Double Chooz.

RENO released updated results[4] in December 2013, confirming θ13 ≠ 0 with a significance of 6.3σ:

sin22θ13=0.100±0.010(stat.)±0.015(syst.)

In 2014, RENO announced the observation of an unexpectedly large number of neutrinos with an energy of 5±1 MeV.[5]: 14–15 This has since been confirmed by the Daya Bay and Double Chooz experiments,[1]: 14–17 and the cause remains an outstanding puzzle.

Expansion plans, referred to as RENO-50, will add a third medium-baseline detector at a distance of 47 km. This distance is better for observing neutrino oscillations, but requires a much larger detector due to the smaller neutrino flux. The location, near Dongshin University, has a 450 m high mountain (Mt. Guemseong), which will provide 900 m.w.e. shielding for the detector. If funded, this will contain 18000 t of scintillator,[1]: 31 surrounded by 15000 photomultiplier tubes.

## References

1. ↑ 1.0 1.1 1.2 Joo, Kyung Kwang (5 July 2016). "Results from RENO and prospects with RENO-50". XXVII International Conference on Neutrino Physics and Astrophysics. London. http://neutrino2016.iopconfs.org/IOP/media/uploaded/EVIOP/event_948/09.45___2_.ppt. Video available at Neutrino Conference 2016 - Tuesday (part 1) on YouTube.
2. ↑ RENO Collaboration (2012-04-03). "Observation of electron-antineutrino disappearance at RENO". Physical Review Letters 108 (18). doi:10.1103/PhysRevLett.108.191802. PMID 23003027. Bibcode: 2012PhRvL.108s1802A.
3. ↑ RENO Collaboration (2012-04-04). "Announcement of the First Results from RENO: Observation of the Weakest Neutrino Transformation". Interactions NewsWire. http://www.interactions.org/cms/?pid=1031612.
4. ↑ Seon-Hee Seo (for the RENO Collaboration) (2013). "New Results from RENO". arXiv:1312.4111 [physics.ins-det].
5. ↑ Seo, Seon-Hee (3 June 2014). "New Results from RENO". XXVI International Conference on Neutrino Physics and Astrophysics. Boston. https://indico.fnal.gov/getFile.py/access?contribId=255&sessionId=15&resId=0&materialId=slides&confId=8022.

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* t
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Neutrino detectors, experiments, and facilities

Discoveries|

* Cowan–Reines (νe)
* Lederman–Schwartz–Steinberger (νμ)
* DONUT (ντ)
* Neutrino oscillation
* SN 1987 neutrino burst

Operating
(divided by
primary
neutrino
source)|

| Astronomical|

* ANITA
* ANTARES
* BDUNT
* Borexino
* BUST
* HALO
* IceCube
* LVD
* NEVOD
* SAGE
* Super-Kamiokande
* SNEWS

|

Reactor|

* Daya Bay
* Double Chooz
* KamLAND
* RENO
* STEREO

Accelerator|

* ICARUS (Fermilab)
* MicroBooNE
* MINERνA
* MiniBooNE
* NA61/SHINE
* NOνA
* NuMI
* T2K
* COHERENT

0νββ|

* AMoRE
* COBRA
* CUORE
* EXO
* GERDA
* KamLAND-Zen
* MAJORANA
* NEXT
* PandaX
* XMASS

Other|

* KATRIN
* WITCH

Construction|

* ANNIE
* ARA
* ARIANNA
* BEST
* DUNE
* JUNO
* KM3NeT
* SNO+
* SuperNEMO

Retired|

* AMANDA
* CDHS
* Chooz
* CNGS
* Cuoricino
* DONUT
* ERPM
* GALLEX
* Gargamelle
* GNO
* Heidelberg-Moscow
* Homestake
* ICARUS
* IGEX
* IMB
* K2K
* Kamiokande
* KARMEN
* KGF
* LSND
* MACRO
* MINOS
* MINOS+
* NARC
* NEMO
* OPERA
* RICE
* SciBooNE
* SNO
* Soudan 2
* Utah

Proposed|

* CUPID
* GRAND
* Hyper-Kamiokande
* INO
* LAGUNA
* LEGEND
* LENA
* Neutrino Factory
* nEXO
* Nucifer
* SBND
* UNO
* JEM-EUSO
* WATCHMAN

Cancelled|

* DUMAND Project
* Long Baseline Neutrino Experiment
* NEMO Project
* NESTOR Project
* SOX
* BOREX

See also|

* BNO
* Kamioka Observatory
* LNGS
* SNOLAB
* List of neutrino experiments

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