In particle physics, exotic baryons are a type of hadron (bound states of quarks and gluons) with half-integer spin, but with a quark content different from the three quarks (qqq) present in conventional baryons. An example would be pentaquarks, consisting of four quarks and one antiquark (qqqqq̅).
So far, the only observed exotic baryons are the pentaquarks Pc(4380)+, Pc(4450)+ discovered in 2015,[1]Pc(4312)+ in 2019[2] and PΛ ψs(4338)0 in 2022 by the LHCb collaboration.[3]
Several types of exotic baryons that require physics beyond the Standard Model have been conjectured in order to explain specific experimental anomalies. There is no independent experimental evidence for any of these particles. One example is supersymmetric R-baryons,[4] which are bound states of 3 quarks and a gluino. The lightest R-baryon is denoted as S0 and consists of an up quark, a down quark, a strange quark and a gluino. This particle is expected to be long lived or stable and has been invoked to explain ultra-high-energy cosmic rays.[5][6] Stable exotic baryons are also candidates for strongly interacting dark matter.
It has been speculated by futurologistRay Kurzweil that by the end of the 21st century it might be possible by using femtotechnology to create new chemical elements composed of exotic baryons that would eventually constitute a new periodic table of elements in which the elements would have completely different properties than the regular chemical elements.[7]
Referencesedit
^R. Aaij et al. (LHCb collaboration) (2015). "Observation of J/ψp resonances consistent with pentaquark states in Λ0 b→J/ψK−p decays". Physical Review Letters. 115 (7): 072001. arXiv:1507.03414. Bibcode:2015PhRvL.115g2001A. doi:10.1103/PhysRevLett.115.072001. PMID 26317714. S2CID 119204136.
^R. Aaij et al. (LHCb collaboration) (2019). "Observation of a narrow pentaquark state, Pc(4312)+, and of two-peak structure of the Pc(4450)+". Physical Review Letters. 122 (22): 222001. arXiv:1904.03947. doi:10.1103/PhysRevLett.122.222001. PMID 31283265. S2CID 102351520.
^ "Observation of a strange pentaquark, a doubly charged tetraquark and its neutral partner". July 5, 2022. Retrieved July 5, 2022.
exotic, baryon, particle, physics, exotic, baryons, type, hadron, bound, states, quarks, gluons, with, half, integer, spin, with, quark, content, different, from, three, quarks, present, conventional, baryons, example, would, pentaquarks, consisting, four, qua. In particle physics exotic baryons are a type of hadron bound states of quarks and gluons with half integer spin but with a quark content different from the three quarks qqq present in conventional baryons An example would be pentaquarks consisting of four quarks and one antiquark qqqqq So far the only observed exotic baryons are the pentaquarks Pc 4380 Pc 4450 discovered in 2015 1 Pc 4312 in 2019 2 and PLpss 4338 0 in 2022 by the LHCb collaboration 3 Several types of exotic baryons that require physics beyond the Standard Model have been conjectured in order to explain specific experimental anomalies There is no independent experimental evidence for any of these particles One example is supersymmetric R baryons 4 which are bound states of 3 quarks and a gluino The lightest R baryon is denoted as S0 and consists of an up quark a down quark a strange quark and a gluino This particle is expected to be long lived or stable and has been invoked to explain ultra high energy cosmic rays 5 6 Stable exotic baryons are also candidates for strongly interacting dark matter It has been speculated by futurologist Ray Kurzweil that by the end of the 21st century it might be possible by using femtotechnology to create new chemical elements composed of exotic baryons that would eventually constitute a new periodic table of elements in which the elements would have completely different properties than the regular chemical elements 7 References edit R Aaij et al LHCb collaboration 2015 Observation of J psp resonances consistent with pentaquark states in L0b J psK p decays Physical Review Letters 115 7 072001 arXiv 1507 03414 Bibcode 2015PhRvL 115g2001A doi 10 1103 PhysRevLett 115 072001 PMID 26317714 S2CID 119204136 R Aaij et al LHCb collaboration 2019 Observation of a narrow pentaquark state Pc 4312 and of two peak structure of the Pc 4450 Physical Review Letters 122 22 222001 arXiv 1904 03947 doi 10 1103 PhysRevLett 122 222001 PMID 31283265 S2CID 102351520 Observation of a strange pentaquark a doubly charged tetraquark and its neutral partner July 5 2022 Retrieved July 5 2022 G R Farrar 1996 Detecting Gluino Containing Hadrons Physical Review Letters 76 22 4111 4114 arXiv hep ph 9603271 Bibcode 1996PhRvL 76 4111F doi 10 1103 PhysRevLett 76 4111 PMID 10061204 S2CID 2814128 D Chung G R Farrar E W Kolb 1998 Are ultra high energy cosmic rays signals of supersymmetry PDF Physical Review D 57 8 4606 arXiv astro ph 9707036 Bibcode 1998PhRvD 57 4606C doi 10 1103 PhysRevD 57 4606 S2CID 44780458 I F M Albuquerque G Farrar E W Kolb 1999 Exotic massive hadrons and ultra high energy cosmic rays Physical Review D 59 1 015021 arXiv hep ph 9805288 Bibcode 1998PhRvD 59a5021A doi 10 1103 PhysRevD 59 015021 Kurzweil Ray The Age of Spiritual Machines 1999 Retrieved from https en wikipedia org w index php title Exotic baryon amp oldid 1169620887, wikipedia, wiki, book, books, library,
