Observation of planar three-jet events in e+e- annihilation and evidence for gluon bremsstrahlung

W. Bartel; T. Canzler; D. Cords; P. Dittmann; R. Eichler; R. Felst; D. Haidt; S. Kawabata; H. Krehbiel; B. Naroska; L. H. O'Neill; J. Olsson; P. Steffen; W. L. Yen; E. Elsen; M. Helm; A. Petersen; P. Warming; G. Weber; H. Drumm; J. Heintze; G. Heinzelmann; R. D. Heuer; J. von Krogh; P. Lennert; H. Matsumura; T. Nozaki; H. Rieseberg; A. Wagner; D. C. Darvill; F. Foster; G. Hughes; H. Wriedt; J. Allison; J. Armitage; I. Duerdoth; J. Hassard; F. Loebinger; B. King; A. Macbeth; H. Mills; P. G. Murphy; H. Prosper; K. Stephens; D. Clarke; M. C. Goddard; R. Hedgecock; R. Marshall; G. F. Pearce; M. Imori; T. Kobayashi; S. Komamiya; M. Koshiba; M. Minowa; S. Orito; A. Sato; T. Suda; H. Takeda; Y. Totsuka; Y. Watanabe; S. Yamada; C. Yanagisawa

doi:10.1016/0370-2693(80)90680-2

Observation of planar three-jet events in e⁺e^- annihilation and evidence for gluon bremsstrahlung

W. Bartel^*, T. Canzler, D. Cords, P. Dittmann, R. Eichler, R. Felst, D. Haidt, S. Kawabata, H. Krehbiel, B. Naroska, L. H. O'Neill, J. Olsson, P. Steffen, W. L. Yen, E. Elsen, M. Helm, A. Petersen, P. Warming, G. Weber, H. DrummJ. Heintze, G. Heinzelmann, R. D. Heuer, J. von Krogh, P. Lennert, H. Matsumura, T. Nozaki, H. Rieseberg, A. Wagner, D. C. Darvill, F. Foster, G. Hughes, H. Wriedt, J. Allison, J. Armitage, I. Duerdoth, J. Hassard, F. Loebinger, B. King, A. Macbeth, H. Mills, P. G. Murphy, H. Prosper, K. Stephens, D. Clarke, M. C. Goddard, R. Hedgecock, R. Marshall, G. F. Pearce, M. Imori, T. Kobayashi, S. Komamiya, M. Koshiba, M. Minowa, S. Orito, A. Sato, T. Suda, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

^*Corresponding author for this work

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Abstract

Topological distributions of charged and neutral hadrons from the reaction e⁺e^- → multihadrons are studied at √s of about 30 GeV. An excess of planar events is observed at a rate which cannot be explained by statistical fluctuations in the standard two-jet process. The planar events, mostly consisting of a slim jet on one side and a broader jet on the other, are shown actually to possess three-jet structure by demonstrating that the broader jet itself consists of two collinear jets in its own rest system. Detailed agreement between data and predictions is obtained if the process e⁺e^-→q q ̄g is taken into account. This strongly suggests gluon bremsstrahlung as the origin of the planar three-jet events. By comparison of the data with the qq̄g-model we obtain a value for the strong coupling constant of α_S(q² = 0.17 ± 0.04.

Original language	English
Pages (from-to)	142-147
Number of pages	6
Journal	Physics Letters B
Volume	91
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(80)90680-2
Publication status	Published - 1980 Mar 24
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(80)90680-2

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Bartel, W., Canzler, T., Cords, D., Dittmann, P., Eichler, R., Felst, R., Haidt, D., Kawabata, S., Krehbiel, H., Naroska, B., O'Neill, L. H., Olsson, J., Steffen, P., Yen, W. L., Elsen, E., Helm, M., Petersen, A., Warming, P., Weber, G., ... Yanagisawa, C. (1980). Observation of planar three-jet events in e⁺e^- annihilation and evidence for gluon bremsstrahlung. Physics Letters B, 91(1), 142-147. https://doi.org/10.1016/0370-2693(80)90680-2

Bartel, W, Canzler, T, Cords, D, Dittmann, P, Eichler, R, Felst, R, Haidt, D, Kawabata, S, Krehbiel, H, Naroska, B, O'Neill, LH, Olsson, J, Steffen, P, Yen, WL, Elsen, E, Helm, M, Petersen, A, Warming, P, Weber, G, Drumm, H, Heintze, J, Heinzelmann, G, Heuer, RD, von Krogh, J, Lennert, P, Matsumura, H, Nozaki, T, Rieseberg, H, Wagner, A, Darvill, DC, Foster, F, Hughes, G, Wriedt, H, Allison, J, Armitage, J, Duerdoth, I, Hassard, J, Loebinger, F, King, B, Macbeth, A, Mills, H, Murphy, PG, Prosper, H, Stephens, K, Clarke, D, Goddard, MC, Hedgecock, R, Marshall, R, Pearce, GF, Imori, M, Kobayashi, T, Komamiya, S, Koshiba, M, Minowa, M, Orito, S, Sato, A, Suda, T, Takeda, H, Totsuka, Y, Watanabe, Y, Yamada, S & Yanagisawa, C 1980, 'Observation of planar three-jet events in e⁺e^- annihilation and evidence for gluon bremsstrahlung', Physics Letters B, vol. 91, no. 1, pp. 142-147. https://doi.org/10.1016/0370-2693(80)90680-2

@article{e483932fd8d64663b712875ad4aa8aa4,

title = "Observation of planar three-jet events in e+e- annihilation and evidence for gluon bremsstrahlung",

abstract = "Topological distributions of charged and neutral hadrons from the reaction e+e- → multihadrons are studied at √s of about 30 GeV. An excess of planar events is observed at a rate which cannot be explained by statistical fluctuations in the standard two-jet process. The planar events, mostly consisting of a slim jet on one side and a broader jet on the other, are shown actually to possess three-jet structure by demonstrating that the broader jet itself consists of two collinear jets in its own rest system. Detailed agreement between data and predictions is obtained if the process e+e-→q q{\= }g is taken into account. This strongly suggests gluon bremsstrahlung as the origin of the planar three-jet events. By comparison of the data with the q{\=q}g-model we obtain a value for the strong coupling constant of αS(q2 = 0.17 ± 0.04.",

author = "W. Bartel and T. Canzler and D. Cords and P. Dittmann and R. Eichler and R. Felst and D. Haidt and S. Kawabata and H. Krehbiel and B. Naroska and O'Neill, {L. H.} and J. Olsson and P. Steffen and Yen, {W. L.} and E. Elsen and M. Helm and A. Petersen and P. Warming and G. Weber and H. Drumm and J. Heintze and G. Heinzelmann and Heuer, {R. D.} and {von Krogh}, J. and P. Lennert and H. Matsumura and T. Nozaki and H. Rieseberg and A. Wagner and Darvill, {D. C.} and F. Foster and G. Hughes and H. Wriedt and J. Allison and J. Armitage and I. Duerdoth and J. Hassard and F. Loebinger and B. King and A. Macbeth and H. Mills and Murphy, {P. G.} and H. Prosper and K. Stephens and D. Clarke and Goddard, {M. C.} and R. Hedgecock and R. Marshall and Pearce, {G. F.} and M. Imori and T. Kobayashi and S. Komamiya and M. Koshiba and M. Minowa and S. Orito and A. Sato and T. Suda and H. Takeda and Y. Totsuka and Y. Watanabe and S. Yamada and C. Yanagisawa",

note = "Funding Information: machine group and the efforts of the technical support groups of the participating institutions in the construction and maintenance of our apparatus. This experiment was supported by the Bundesministerium flit Forschung und Technologie, by the Education Ministry of Japan and by the U.K. Science Research Council through the Rutherford Laboratory. The visiting groups at DESY wish to thank the DESY directorate for their hospitality. Funding Information: 3 Present address: Cosmic Ray Laboratory, University of Tokyo, Japan. 4 Partly supported by the Yamada Science Foundation.",

year = "1980",

month = mar,

day = "24",

doi = "10.1016/0370-2693(80)90680-2",

language = "English",

volume = "91",

pages = "142--147",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Observation of planar three-jet events in e+e- annihilation and evidence for gluon bremsstrahlung

AU - Bartel, W.

AU - Canzler, T.

AU - Cords, D.

AU - Dittmann, P.

AU - Eichler, R.

AU - Felst, R.

AU - Haidt, D.

AU - Kawabata, S.

AU - Krehbiel, H.

AU - Naroska, B.

AU - O'Neill, L. H.

AU - Olsson, J.

AU - Steffen, P.

AU - Yen, W. L.

AU - Elsen, E.

AU - Helm, M.

AU - Petersen, A.

AU - Warming, P.

AU - Weber, G.

AU - Drumm, H.

AU - Heintze, J.

AU - Heinzelmann, G.

AU - Heuer, R. D.

AU - von Krogh, J.

AU - Lennert, P.

AU - Matsumura, H.

AU - Nozaki, T.

AU - Rieseberg, H.

AU - Wagner, A.

AU - Darvill, D. C.

AU - Foster, F.

AU - Hughes, G.

AU - Wriedt, H.

AU - Allison, J.

AU - Armitage, J.

AU - Duerdoth, I.

AU - Hassard, J.

AU - Loebinger, F.

AU - King, B.

AU - Macbeth, A.

AU - Mills, H.

AU - Murphy, P. G.

AU - Prosper, H.

AU - Stephens, K.

AU - Clarke, D.

AU - Goddard, M. C.

AU - Hedgecock, R.

AU - Marshall, R.

AU - Pearce, G. F.

AU - Imori, M.

AU - Kobayashi, T.

AU - Komamiya, S.

AU - Koshiba, M.

AU - Minowa, M.

AU - Orito, S.

AU - Sato, A.

AU - Suda, T.

AU - Takeda, H.

AU - Totsuka, Y.

AU - Watanabe, Y.

AU - Yamada, S.

AU - Yanagisawa, C.

N1 - Funding Information: machine group and the efforts of the technical support groups of the participating institutions in the construction and maintenance of our apparatus. This experiment was supported by the Bundesministerium flit Forschung und Technologie, by the Education Ministry of Japan and by the U.K. Science Research Council through the Rutherford Laboratory. The visiting groups at DESY wish to thank the DESY directorate for their hospitality. Funding Information: 3 Present address: Cosmic Ray Laboratory, University of Tokyo, Japan. 4 Partly supported by the Yamada Science Foundation.

PY - 1980/3/24

Y1 - 1980/3/24

N2 - Topological distributions of charged and neutral hadrons from the reaction e+e- → multihadrons are studied at √s of about 30 GeV. An excess of planar events is observed at a rate which cannot be explained by statistical fluctuations in the standard two-jet process. The planar events, mostly consisting of a slim jet on one side and a broader jet on the other, are shown actually to possess three-jet structure by demonstrating that the broader jet itself consists of two collinear jets in its own rest system. Detailed agreement between data and predictions is obtained if the process e+e-→q q ̄g is taken into account. This strongly suggests gluon bremsstrahlung as the origin of the planar three-jet events. By comparison of the data with the qq̄g-model we obtain a value for the strong coupling constant of αS(q2 = 0.17 ± 0.04.

AB - Topological distributions of charged and neutral hadrons from the reaction e+e- → multihadrons are studied at √s of about 30 GeV. An excess of planar events is observed at a rate which cannot be explained by statistical fluctuations in the standard two-jet process. The planar events, mostly consisting of a slim jet on one side and a broader jet on the other, are shown actually to possess three-jet structure by demonstrating that the broader jet itself consists of two collinear jets in its own rest system. Detailed agreement between data and predictions is obtained if the process e+e-→q q ̄g is taken into account. This strongly suggests gluon bremsstrahlung as the origin of the planar three-jet events. By comparison of the data with the qq̄g-model we obtain a value for the strong coupling constant of αS(q2 = 0.17 ± 0.04.

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U2 - 10.1016/0370-2693(80)90680-2

DO - 10.1016/0370-2693(80)90680-2

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VL - 91

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EP - 147

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Observation of planar three-jet events in e⁺e^- annihilation and evidence for gluon bremsstrahlung

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