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discovered in 2015 is also expected to be massless, but these are not actual particles. At one time neutrinos were thought to perhaps be Weyl fermions, but when they were discovered to have mass, that left no fundamental particles of the Weyl type.
366:, so the Standard Model neither predicts any such particle nor requires it, and no gravitational quantum particle has been indicated by experiment. Whether or not a graviton would be massless if it existed is likewise an open question.
392:, which are also quasiparticles. No real particle that is a Weyl fermion has been found to exist, and there is no compelling theoretical reason that requires them to exist.
388:– composite motions found in the structure of molecular latices that have particle-like behavior, but are not themselves real particles. Weyl fermions in matter are like
610:
406:
as they travel, at least two of the types of neutrinos must have mass (and cannot be Weyl fermions). The discovery of this phenomenon, known as
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323:, which are known from experiment to be extremely massive. Of these, only the photon has been experimentally confirmed to be massless.
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574:"After 85 year search, massless particle with promise for next-generation electronics found"
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338:, and hence their presumed lack of rest mass cannot be confirmed by any feasible experiment.
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Day, Charles (2015-10-07). "Takaaki Kajita and Arthur McDonald share 2015 Physics Nobel".
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Su-Yang Xu; Ilya
Belopolski; Nasser Alidoust; Madhab Neupane; et al. (16 July 2015).
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Valencia, G. (1992). "Anomalous gauge-boson couplings at hadron supercolliders".
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Debrescu, B.A. (2005). "Massless gauge bosons other than the photon".
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Although there are compelling theoretical reasons to believe that
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that are both believed to be massless; the other is the
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were originally thought to be massless – and possibly
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319:). The only other confirmed gauge bosons are the
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382:The Weyl fermions discovered in 2015 are merely
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27:Particle whose invariant mass is zero
672:Garisto, Robert (1 September 1998).
402:. However, because neutrinos change
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288:Purely hypothetical / unconfirmed
156:Other particles and quasiparticles
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513:Physical Review Letters
414:and Japanese scientist
420:Nobel prize in physics
307:) is one of two known
1785:Wave–particle duality
1775:Relativistic particle
912:Electron antineutrino
674:"Neutrinos have mass"
432:Relativistic particle
342:Hypothetical graviton
1015:Faddeev–Popov ghosts
765:Particles in physics
582:Princeton University
408:neutrino oscillation
182:Interaction mediated
54:improve this article
1790:Particle chauvinism
1733:Subatomic particles
629:2015Sci...349..613X
536:2005PhRvL..94o1802D
481:1992AIPC..272.1572V
437:Gravitational waves
356:gravitational force
214:Confirmed massless
142:elementary particle
69:"Massless particle"
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412:Arthur B. McDonald
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43:This article
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1476:Hypothetical
1424:Exotic atoms
1293:Omega baryon
1283:Sigma baryon
1273:Delta baryon
1025:Hypothetical
1007:Ghost fields
993:Higgs boson
927:Tau neutrino
819:Charm (quark
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689:. Retrieved
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656:. Retrieved
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309:gauge bosons
303:(carrier of
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169:Antiparticle
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64:
52:Please help
47:verification
44:
1758:Quark model
1526:Theta meson
1429:Positronium
1341:Omega meson
1336:J/psi meson
1266:Antineutron
1177:Dark photon
1142:Graviphoton
1101:Stop squark
809:Down (quark
613:: 613–617.
284:Gravitation
1821:Categories
1500:Heptaquark
1461:Superatoms
1394:Pentaquark
1384:Tetraquark
1366:Quarkonium
1256:Antiproton
1157:Leptoquark
1092:Neutralino
854:antiquark)
844:antiquark)
839:Top (quark
834:antiquark)
824:antiquark)
814:antiquark)
804:antiquark)
773:Elementary
691:2023-11-14
658:2023-11-14
620:1502.03807
443:References
185:Existence
110:April 2022
80:newspapers
1738:Particles
1683:Particles
1642:Polariton
1632:Plasmaron
1602:Dropleton
1495:Hexaquark
1466:Molecules
1454:Protonium
1331:Phi meson
1316:Rho meson
1288:Xi baryon
1220:Composite
1056:Gravitino
799:Up (quark
725:0031-9228
676:. Focus.
653:206636457
396:Neutrinos
1714:timeline
1566:R-hadron
1521:Glueball
1505:Skyrmion
1439:Tauonium
1152:Inflaton
1147:Graviton
1127:Curvaton
1097:Sfermion
1087:Higgsino
1082:Chargino
1043:Gauginos
902:Neutrino
887:Antimuon
877:Positron
872:Electron
782:Fermions
645:26184916
609:(6248).
578:phys.org
552:15904133
497:18917295
426:See also
358:in some
348:graviton
265:Graviton
172:Charge (
18:Massless
1702:Related
1673:Baryons
1647:Polaron
1637:Plasmon
1612:Fracton
1607:Exciton
1561:Diquark
1556:Pomeron
1531:T meson
1488:Baryons
1449:Pionium
1434:Muonium
1361:D meson
1356:B meson
1261:Neutron
1246:Nucleon
1238:Baryons
1229:Hadrons
1192:Tachyon
1167:Majoron
1132:Dilaton
1061:Photino
897:Antitau
864:Leptons
678:aps.org
625:Bibcode
602:Science
560:7123874
532:Bibcode
477:Bibcode
404:flavour
390:phonons
336:hadrons
334:within
94:scholar
1678:Mesons
1627:Phonon
1622:Magnon
1544:Others
1514:Mesons
1407:Others
1303:Mesons
1251:Proton
1115:Others
1070:Others
1051:Gluino
985:Scalar
965:Photon
948:Bosons
791:Quarks
723:
651:
643:
558:
550:
495:
328:gluons
301:photon
191:Photon
166:Symbol
150:photon
144:whose
140:is an
96:
89:
82:
75:
67:
1666:Lists
1657:Trion
1652:Roton
1592:Anyon
1419:Atoms
1182:Preon
1122:Axion
1077:Axino
970:Gluon
957:Gauge
649:S2CID
615:arXiv
556:S2CID
522:arXiv
493:S2CID
467:arXiv
313:gluon
220:Gluon
101:JSTOR
87:books
1617:Hole
1444:Onia
1351:Kaon
1311:Pion
882:Muon
721:ISSN
641:PMID
611:AAAS
548:PMID
374:The
346:The
299:The
274:Self
245:Self
200:Self
179:Spin
163:Name
136:, a
73:news
892:Tau
713:doi
633:doi
607:349
540:doi
485:doi
463:272
132:In
56:by
1823::
719:.
711:.
684:.
680:.
647:.
639:.
631:.
623:.
605:.
599:.
580:.
576:.
554:.
546:.
538:.
530:.
518:94
516:.
491:.
483:.
475:.
461:.
422:.
152:.
1390:)
1386:(
1103:)
1099:(
757:e
750:t
743:v
727:.
715::
694:.
661:.
635::
627::
617::
562:.
542::
534::
524::
499:.
487::
479::
469::
280:2
277:0
270:G
251:1
248:0
233:g
206:1
203:0
196:Îł
176:)
174:e
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
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