Experimental investigation of the energy dependence of the strong coupling strength

S. Bethke, J. Allison, K. Ambrus, R. J. Barlow, W. Bartel, C. K. Bowdery, S. L. Cartwright, J. Chrin, D. Clarke, A. Dieckmann, I. P. Duerdoth, G. Eckerlin, E. Elsen, R. Felst, A. J. Finch, F. Foster, T. Greenshaw, J. Hagemann, D. Haidt, J. Heintze & 42 others G. Heinzelmann, K. H. Hellenbrand, P. Hill, G. Hughes, H. Kado, K. Kawagoe, C. Kleinwort, G. Knies, T. Kobayashi, Sachio Komamiya, H. Krehbiel, J. von Krogh, M. Kuhlen, F. K. Loebinger, A. A. Macbeth, N. Magnussen, R. Marshall, R. Meinke, R. P. Middleton, M. Minowa, P. G. Murphy, B. Naroska, J. M. Nye, J. Olsson, F. Ould-Saada, A. Petersen, R. Ramcke, H. Rieseberg, D. Schmidt, H. vd Schmitt, L. Smolik, U. Schneekloth, J. A.J. Skard, J. Spitzer, P. Steffen, K. Stephens, A. Wagner, I. W. Walker, P. Warming, G. Weber, M. Zimmer, G. T. Zorn

Research output: Contribution to journalArticle

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Abstract

The energy dependence of the relative production rate of three-jet events is studied in hadronic e+e- annihilation events at center of mass energies between 22 and 46.7 GeV. Three-jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(αs 2) perturbative QCD calculations, where the relative production rate of three-jet events is roughly proportional to the size of the strong coupling strength. The production rates of three-jet events in the data decrease significantly with increasing centre of mass energy. The experimental rates, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength. The hypothesis of an energy independent coupling constant can be excluded with a significance of four standard derivations.

Original languageEnglish
Pages (from-to)235-241
Number of pages7
JournalPhysics Letters B
Volume213
Issue number2
DOIs
Publication statusPublished - 1988 Oct 20
Externally publishedYes

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energy
center of mass
quantum chromodynamics
fragmentation
derivation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bethke, S., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bowdery, C. K., ... Zorn, G. T. (1988). Experimental investigation of the energy dependence of the strong coupling strength. Physics Letters B, 213(2), 235-241. https://doi.org/10.1016/0370-2693(88)91032-5

Experimental investigation of the energy dependence of the strong coupling strength. / Bethke, S.; Allison, J.; Ambrus, K.; Barlow, R. J.; Bartel, W.; Bowdery, C. K.; Cartwright, S. L.; Chrin, J.; Clarke, D.; Dieckmann, A.; Duerdoth, I. P.; Eckerlin, G.; Elsen, E.; Felst, R.; Finch, A. J.; Foster, F.; Greenshaw, T.; Hagemann, J.; Haidt, D.; Heintze, J.; Heinzelmann, G.; Hellenbrand, K. H.; Hill, P.; Hughes, G.; Kado, H.; Kawagoe, K.; Kleinwort, C.; Knies, G.; Kobayashi, T.; Komamiya, Sachio; Krehbiel, H.; von Krogh, J.; Kuhlen, M.; Loebinger, F. K.; Macbeth, A. A.; Magnussen, N.; Marshall, R.; Meinke, R.; Middleton, R. P.; Minowa, M.; Murphy, P. G.; Naroska, B.; Nye, J. M.; Olsson, J.; Ould-Saada, F.; Petersen, A.; Ramcke, R.; Rieseberg, H.; Schmidt, D.; Schmitt, H. vd; Smolik, L.; Schneekloth, U.; Skard, J. A.J.; Spitzer, J.; Steffen, P.; Stephens, K.; Wagner, A.; Walker, I. W.; Warming, P.; Weber, G.; Zimmer, M.; Zorn, G. T.

In: Physics Letters B, Vol. 213, No. 2, 20.10.1988, p. 235-241.

Research output: Contribution to journalArticle

Bethke, S, Allison, J, Ambrus, K, Barlow, RJ, Bartel, W, Bowdery, CK, Cartwright, SL, Chrin, J, Clarke, D, Dieckmann, A, Duerdoth, IP, Eckerlin, G, Elsen, E, Felst, R, Finch, AJ, Foster, F, Greenshaw, T, Hagemann, J, Haidt, D, Heintze, J, Heinzelmann, G, Hellenbrand, KH, Hill, P, Hughes, G, Kado, H, Kawagoe, K, Kleinwort, C, Knies, G, Kobayashi, T, Komamiya, S, Krehbiel, H, von Krogh, J, Kuhlen, M, Loebinger, FK, Macbeth, AA, Magnussen, N, Marshall, R, Meinke, R, Middleton, RP, Minowa, M, Murphy, PG, Naroska, B, Nye, JM, Olsson, J, Ould-Saada, F, Petersen, A, Ramcke, R, Rieseberg, H, Schmidt, D, Schmitt, HV, Smolik, L, Schneekloth, U, Skard, JAJ, Spitzer, J, Steffen, P, Stephens, K, Wagner, A, Walker, IW, Warming, P, Weber, G, Zimmer, M & Zorn, GT 1988, 'Experimental investigation of the energy dependence of the strong coupling strength', Physics Letters B, vol. 213, no. 2, pp. 235-241. https://doi.org/10.1016/0370-2693(88)91032-5
Bethke S, Allison J, Ambrus K, Barlow RJ, Bartel W, Bowdery CK et al. Experimental investigation of the energy dependence of the strong coupling strength. Physics Letters B. 1988 Oct 20;213(2):235-241. https://doi.org/10.1016/0370-2693(88)91032-5
Bethke, S. ; Allison, J. ; Ambrus, K. ; Barlow, R. J. ; Bartel, W. ; Bowdery, C. K. ; Cartwright, S. L. ; Chrin, J. ; Clarke, D. ; Dieckmann, A. ; Duerdoth, I. P. ; Eckerlin, G. ; Elsen, E. ; Felst, R. ; Finch, A. J. ; Foster, F. ; Greenshaw, T. ; Hagemann, J. ; Haidt, D. ; Heintze, J. ; Heinzelmann, G. ; Hellenbrand, K. H. ; Hill, P. ; Hughes, G. ; Kado, H. ; Kawagoe, K. ; Kleinwort, C. ; Knies, G. ; Kobayashi, T. ; Komamiya, Sachio ; Krehbiel, H. ; von Krogh, J. ; Kuhlen, M. ; Loebinger, F. K. ; Macbeth, A. A. ; Magnussen, N. ; Marshall, R. ; Meinke, R. ; Middleton, R. P. ; Minowa, M. ; Murphy, P. G. ; Naroska, B. ; Nye, J. M. ; Olsson, J. ; Ould-Saada, F. ; Petersen, A. ; Ramcke, R. ; Rieseberg, H. ; Schmidt, D. ; Schmitt, H. vd ; Smolik, L. ; Schneekloth, U. ; Skard, J. A.J. ; Spitzer, J. ; Steffen, P. ; Stephens, K. ; Wagner, A. ; Walker, I. W. ; Warming, P. ; Weber, G. ; Zimmer, M. ; Zorn, G. T. / Experimental investigation of the energy dependence of the strong coupling strength. In: Physics Letters B. 1988 ; Vol. 213, No. 2. pp. 235-241.
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title = "Experimental investigation of the energy dependence of the strong coupling strength",
abstract = "The energy dependence of the relative production rate of three-jet events is studied in hadronic e+e- annihilation events at center of mass energies between 22 and 46.7 GeV. Three-jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(αs 2) perturbative QCD calculations, where the relative production rate of three-jet events is roughly proportional to the size of the strong coupling strength. The production rates of three-jet events in the data decrease significantly with increasing centre of mass energy. The experimental rates, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength. The hypothesis of an energy independent coupling constant can be excluded with a significance of four standard derivations.",
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T1 - Experimental investigation of the energy dependence of the strong coupling strength

AU - Bethke, S.

AU - Allison, J.

AU - Ambrus, K.

AU - Barlow, R. J.

AU - Bartel, W.

AU - Bowdery, C. K.

AU - Cartwright, S. L.

AU - Chrin, J.

AU - Clarke, D.

AU - Dieckmann, A.

AU - Duerdoth, I. P.

AU - Eckerlin, G.

AU - Elsen, E.

AU - Felst, R.

AU - Finch, A. J.

AU - Foster, F.

AU - Greenshaw, T.

AU - Hagemann, J.

AU - Haidt, D.

AU - Heintze, J.

AU - Heinzelmann, G.

AU - Hellenbrand, K. H.

AU - Hill, P.

AU - Hughes, G.

AU - Kado, H.

AU - Kawagoe, K.

AU - Kleinwort, C.

AU - Knies, G.

AU - Kobayashi, T.

AU - Komamiya, Sachio

AU - Krehbiel, H.

AU - von Krogh, J.

AU - Kuhlen, M.

AU - Loebinger, F. K.

AU - Macbeth, A. A.

AU - Magnussen, N.

AU - Marshall, R.

AU - Meinke, R.

AU - Middleton, R. P.

AU - Minowa, M.

AU - Murphy, P. G.

AU - Naroska, B.

AU - Nye, J. M.

AU - Olsson, J.

AU - Ould-Saada, F.

AU - Petersen, A.

AU - Ramcke, R.

AU - Rieseberg, H.

AU - Schmidt, D.

AU - Schmitt, H. vd

AU - Smolik, L.

AU - Schneekloth, U.

AU - Skard, J. A.J.

AU - Spitzer, J.

AU - Steffen, P.

AU - Stephens, K.

AU - Wagner, A.

AU - Walker, I. W.

AU - Warming, P.

AU - Weber, G.

AU - Zimmer, M.

AU - Zorn, G. T.

PY - 1988/10/20

Y1 - 1988/10/20

N2 - The energy dependence of the relative production rate of three-jet events is studied in hadronic e+e- annihilation events at center of mass energies between 22 and 46.7 GeV. Three-jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(αs 2) perturbative QCD calculations, where the relative production rate of three-jet events is roughly proportional to the size of the strong coupling strength. The production rates of three-jet events in the data decrease significantly with increasing centre of mass energy. The experimental rates, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength. The hypothesis of an energy independent coupling constant can be excluded with a significance of four standard derivations.

AB - The energy dependence of the relative production rate of three-jet events is studied in hadronic e+e- annihilation events at center of mass energies between 22 and 46.7 GeV. Three-jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(αs 2) perturbative QCD calculations, where the relative production rate of three-jet events is roughly proportional to the size of the strong coupling strength. The production rates of three-jet events in the data decrease significantly with increasing centre of mass energy. The experimental rates, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength. The hypothesis of an energy independent coupling constant can be excluded with a significance of four standard derivations.

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