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 & 42 others 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, Sachio Komamiya, M. Koshiba, M. Minowa, S. Orito, A. Sato, T. Suda, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

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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 αS(q2 = 0.17 ± 0.04.

Original languageEnglish
Pages (from-to)142-147
Number of pages6
JournalPhysics Letters B
Volume91
Issue number1
DOIs
Publication statusPublished - 1980 Mar 24
Externally publishedYes

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bremsstrahlung
hadrons
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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bartel, W., Canzler, T., Cords, D., Dittmann, P., Eichler, R., Felst, R., ... 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

Observation of planar three-jet events in e+e- annihilation and evidence for gluon bremsstrahlung. / 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.; Drumm, H.; Heintze, J.; Heinzelmann, G.; Heuer, R. D.; von Krogh, J.; Lennert, P.; Matsumura, H.; Nozaki, T.; Rieseberg, H.; Wagner, A.; Darvill, D. C.; Foster, F.; Hughes, G.; Wriedt, H.; Allison, J.; Armitage, J.; Duerdoth, I.; Hassard, J.; Loebinger, F.; King, B.; Macbeth, A.; Mills, H.; Murphy, P. G.; Prosper, H.; Stephens, K.; Clarke, D.; Goddard, M. C.; Hedgecock, R.; Marshall, R.; Pearce, G. F.; Imori, M.; Kobayashi, T.; Komamiya, Sachio; Koshiba, M.; Minowa, M.; Orito, S.; Sato, A.; Suda, T.; Takeda, H.; Totsuka, Y.; Watanabe, Y.; Yamada, S.; Yanagisawa, C.

In: Physics Letters B, Vol. 91, No. 1, 24.03.1980, p. 142-147.

Research output: Contribution to journalArticle

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
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. ; Drumm, H. ; Heintze, J. ; Heinzelmann, G. ; Heuer, R. D. ; von Krogh, J. ; Lennert, P. ; Matsumura, H. ; Nozaki, T. ; Rieseberg, H. ; Wagner, A. ; Darvill, D. C. ; Foster, F. ; Hughes, G. ; Wriedt, H. ; Allison, J. ; Armitage, J. ; Duerdoth, I. ; Hassard, J. ; Loebinger, F. ; King, B. ; Macbeth, A. ; Mills, H. ; Murphy, P. G. ; Prosper, H. ; Stephens, K. ; Clarke, D. ; Goddard, M. C. ; Hedgecock, R. ; Marshall, R. ; Pearce, G. F. ; Imori, M. ; Kobayashi, T. ; Komamiya, Sachio ; Koshiba, M. ; Minowa, M. ; Orito, S. ; Sato, A. ; Suda, T. ; Takeda, H. ; Totsuka, Y. ; Watanabe, Y. ; Yamada, S. ; Yanagisawa, C. / Observation of planar three-jet events in e+e- annihilation and evidence for gluon bremsstrahlung. In: Physics Letters B. 1980 ; Vol. 91, No. 1. pp. 142-147.
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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 qq̄g-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 Sachio 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",
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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, Sachio

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.

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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EP - 147

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

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