Editing Antineutron (section)

==Background ==

The antineutron was discovered in [[proton–antiproton collision]]s at the [[Bevatron]] ([[Lawrence Berkeley National Laboratory]]) by the team of [[Bruce Cork]], Glen Lambertson, [[Oreste Piccioni]], and William Wenzel in 1956,<ref>{{cite journal |last1=Cork |first1=Bruce |last2=Lambertson |first2=Glen R. |last3=Piccioni |first3=Oreste |last4=Wenzel |first4=William A. |title=Antineutrons Produced from Antiprotons in Charge-Exchange Collisions |journal=Physical Review |date=15 November 1956 |volume=104 |issue=4  |pages=1193–1197 |doi=10.1103/PhysRev.104.1193 |bibcode=1956PhRv..104.1193C |s2cid=123156830 |url=http://www.escholarship.org/uc/item/0cn7n2mz }}</ref> one year after the [[antiproton]] was discovered.

Since the antineutron is electrically neutral, it cannot easily be observed directly. Instead, the products of its [[annihilation]] with ordinary matter are observed. In theory, a free antineutron should [[particle decay|decay]] into an [[antiproton]], a [[positron]], and a [[neutrino]] in a process analogous to the [[beta decay]] of [[free neutron]]s. There are theoretical proposals of [[Neutron–antineutron oscillation|neutron–antineutron oscillations]], a process that implies the violation of the [[baryon number]] conservation.<ref>{{cite journal|author=R. N. Mohapatra|date=2009|title=Neutron-Anti-Neutron Oscillation: Theory and Phenomenology|journal=[[Journal of Physics G]]|volume=36|issue=10|pages=104006|doi=10.1088/0954-3899/36/10/104006|arxiv=0902.0834|bibcode = 2009JPhG...36j4006M |s2cid=15126201}}</ref><ref>{{cite web|author=C. Giunti |author2=M. Laveder |date=19 August 2010 |title=Neutron Oscillations |url=http://www.nu.to.infn.it/Neutron_Oscillations/ |work=Neutrino Unbound |publisher=[[Istituto Nazionale di Fisica Nucleare]] |access-date=19 August 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110927180013/http://www.nu.to.infn.it/Neutron_Oscillations/ |archive-date=27 September 2011 }}</ref><ref>{{cite web|author=Y. A. Kamyshkov|date=16 January 2002|title=Neutron → Antineutron Oscillations|url=http://muonstoragerings.web.cern.ch/muonstoragerings/NuWorkshop02/presentations/kamyshkov1.pdf|work=NNN 2002 Workshop on "Large Detectors for Proton Decay, Supernovae and Atmospheric Neutrinos and Low Energy Neutrinos from High Intensity Beams" at CERN|access-date=19 August 2010}}</ref> There is a project to search for neutron-antineutron oscillations using ultracold neutrons.<ref>{{cite journal | last1=Serebrov | first1=A. | last2=Fomin | first2=A. | last3=Kamyshkov | first3=Y. | title=Sensitivity of Experiment on Search for Neutron–Antineutron Oscillations on the Projected Ultracold Neutron Source at the WWR-M Reactor | journal=Technical Physics Letters | volume=42 | issue=1 | year=2016 | doi=10.1134/S1063785016010314 | pages=99–101| bibcode=2016TePhL..42...99S }}</ref><ref>{{cite journal | last=A.K. Fomin | display-authors=et al.| title=Experiment on search for neutron–antineutron oscillations using a projected UCN source at the WWR-M reactor | journal=Journal of Physics: Conference Series | volume=798 | year=2017 | issue=1| doi=10.1088/1742-6596/798/1/012115 | pages=012115| bibcode=2017JPhCS.798a2115F| doi-access=free }}</ref><ref>{{cite journal | last=A.K. Fomin | title=Experiment On Search For n-nbar Oscillations Using A Projected UCN Source At The WWR-M Reactor | journal=Proceedings of Science | volume=281 | year=2017 | doi=10.22323/1.281.0189 | pages=189| doi-access=free }}</ref><ref>{{cite journal | last=A.K. Fomin | display-authors=et al.| title=Project on searching for neutron-antineutron oscillation at the WWR-M reactor | journal=Journal of Physics: Conference Series | volume=1390 | year=2019 | issue=1| doi=10.1088/1742-6596/1390/1/012133 | pages=012133| bibcode=2019JPhCS1390a2133F| doi-access=free }}</ref>