Editing Antimatter (section)

===Antiprotons, antineutrons, and antinuclei===
{{Main|Antiproton|Antineutron}}

The existence of the antiproton was experimentally confirmed in 1955 by [[University of California, Berkeley]] [[physicist]]s [[Emilio Segrè]] and [[Owen Chamberlain]], for which they were awarded the 1959 [[Nobel Prize in Physics]].<ref>{{cite web | url=http://nobelprize.org/nobel_prizes/physics/laureates/ | title=All Nobel Prizes in Physics | archive-url=https://web.archive.org/web/20100723052215/http://nobelprize.org/nobel_prizes/physics/laureates/ | archive-date=23 July 2010 | url-status=live}}</ref> An antiproton consists of two up antiquarks and one down antiquark ({{Subatomic particle|link=yes|Up antiquark}}{{Subatomic particle|link=yes|Up antiquark}}{{Subatomic particle|link=yes|Down antiquark}}). The properties of the antiproton that have been measured all match the corresponding properties of the proton, with the exception of the antiproton having opposite electric charge and magnetic moment from the proton. Shortly afterwards, in 1956, the antineutron was discovered in proton–proton collisions at the [[Bevatron]] ([[Lawrence Berkeley National Laboratory]]) by [[Bruce Cork]] and colleagues.<ref>{{cite web | url=http://bancroft.berkeley.edu/Exhibits/physics/extending02.html | title=Breaking Through: A Century of Physics at Berkeley, 1868–1968 | publisher=[[Regents of the University of California]] | date=2006 | access-date=18 November 2010 | archive-url=https://web.archive.org/web/20100709235643/http://bancroft.berkeley.edu/Exhibits/physics/extending02.html | archive-date=9 July 2010 | url-status=live}}</ref>

In addition to anti[[baryon]]s, anti-nuclei consisting of multiple bound antiprotons and antineutrons have been created. These are typically produced at energies far too high to form antimatter atoms (with bound positrons in place of electrons). In 1965, a group of researchers led by [[Antonino Zichichi]] reported production of nuclei of [[antideuterium]] at the Proton Synchrotron at [[CERN]].<ref>{{cite journal | bibcode=1965NCimS..39...10M | title=Experimental observation of antideuteron production | date=1965 | last1=Massam | first1=T. | last2=Muller | first2=Th. | last3=Righini | first3=B. | last4=Schneegans | first4=M. | last5=Zichichi | first5=A. | journal=Il Nuovo Cimento | volume=39 | issue=1 | pages=10–14 | doi=10.1007/BF02814251| s2cid=122952224 }}</ref> At roughly the same time, observations of antideuterium nuclei were reported by a group of American physicists at the Alternating Gradient Synchrotron at [[Brookhaven National Laboratory]].<ref>{{cite journal | bibcode=1965PhRvL..14.1003D | date=June 1965 | first1=D. E | last1=Dorfan | title=Observation of Antideuterons | last2=Eades | first2=J. | last3=Lederman | first3=L. M. | last4=Lee | first4=W. | last5=Ting | first5=C. C. | journal=Physical Review Letters | volume=14 | issue=24 | pages=1003–1006 | doi=10.1103/PhysRevLett.14.1003}}</ref>