Topology of the Υ-decay

Ch Berger; W. Lackas; F. Raupach; G. Alexander; J. Bürger; L. Criegee; H. C. Dehne; R. Devenish; G. Flügge; G. Franke; Ch Gerke; G. Knies; E. Lehmann; B. Stella; U. Timm; W. Wagner; Waloschek; G. G. Winter; W. Zimmermann; O. Achterberg; V. Blobel; L. Boesten; H. Kapitza; B. Koppitz; W. Lührsen; H. Spitzer; R. van Staa; A. Bäcker; S. Brandt; K. Derikum; C. Grupen; H. J. Meyer; B. Neumann; G. Zech; H. J. Daum; H. Meyer; O. Meyer; M. Rössler; K. Wacker

doi:10.1007/BF01547873

Topology of the Υ-decay

Ch Berger, W. Lackas, F. Raupach, G. Alexander, J. Bürger, L. Criegee, H. C. Dehne, R. Devenish, G. Flügge, G. Franke, Ch Gerke, G. Knies, E. Lehmann, B. Stella, U. Timm, W. Wagner, Waloschek, G. G. Winter, W. Zimmermann, O. AchterbergV. Blobel, L. Boesten, H. Kapitza, B. Koppitz, W. Lührsen, H. Spitzer, R. van Staa, A. Bäcker, S. Brandt, K. Derikum, C. Grupen, H. J. Meyer, B. Neumann, G. Zech, H. J. Daum, H. Meyer, O. Meyer, M. Rössler, K. Wacker

Research output: Contribution to journal › Article › peer-review

Abstract

Multihadron events resulting from e⁺e^- annihilation at the Υ-resonance are analysed with respect to lowest order QCD which predicts a dominant Υ decay into three vector gluons. Smearing effects due to the gluon fragmentation are so large, however, that no clear 3-jet structure or flatness is expected in the hadron final state. Instead, Monte Carlo simulations predict event structures with thrust and triplicity distributions distinctly different from those of two quark-jet and of phase space like decay mechanisms. The data are in perfect agreement with the 3-vector gluon decay as predicted by QCD and exclude dominantly phase space like or 2-quark jet decays. Also, the decay into scalar gluons is excluded by the data. An upper limit for the Υ-decay into one photon and two gluons is obtained.

Original language	English
Pages (from-to)	101-114
Number of pages	14
Journal	European Physical Journal C
Volume	8
Issue number	2
DOIs	https://doi.org/10.1007/BF01547873
State	Published - Jun 1981
Externally published	Yes

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10.1007/BF01547873

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Berger, Ch ; Lackas, W. ; Raupach, F. ; Alexander, G. ; Bürger, J. ; Criegee, L. ; Dehne, H. C. ; Devenish, R. ; Flügge, G. ; Franke, G. ; Gerke, Ch ; Knies, G. ; Lehmann, E. ; Stella, B. ; Timm, U. ; Wagner, W. ; Waloschek ; Winter, G. G. ; Zimmermann, W. ; Achterberg, O. ; Blobel, V. ; Boesten, L. ; Kapitza, H. ; Koppitz, B. ; Lührsen, W. ; Spitzer, H. ; van Staa, R. ; Bäcker, A. ; Brandt, S. ; Derikum, K. ; Grupen, C. ; Meyer, H. J. ; Neumann, B. ; Zech, G. ; Daum, H. J. ; Meyer, H. ; Meyer, O. ; Rössler, M. ; Wacker, K. / Topology of the Υ-decay. In: European Physical Journal C. 1981 ; Vol. 8, No. 2. pp. 101-114.

@article{6f5b0bcecc39455ea856ce7c4c3bd45c,

title = "Topology of the Υ-decay",

abstract = "Multihadron events resulting from e+e- annihilation at the Υ-resonance are analysed with respect to lowest order QCD which predicts a dominant Υ decay into three vector gluons. Smearing effects due to the gluon fragmentation are so large, however, that no clear 3-jet structure or flatness is expected in the hadron final state. Instead, Monte Carlo simulations predict event structures with thrust and triplicity distributions distinctly different from those of two quark-jet and of phase space like decay mechanisms. The data are in perfect agreement with the 3-vector gluon decay as predicted by QCD and exclude dominantly phase space like or 2-quark jet decays. Also, the decay into scalar gluons is excluded by the data. An upper limit for the Υ-decay into one photon and two gluons is obtained.",

author = "Ch Berger and W. Lackas and F. Raupach and G. Alexander and J. B{\"u}rger and L. Criegee and Dehne, {H. C.} and R. Devenish and G. Fl{\"u}gge and G. Franke and Ch Gerke and G. Knies and E. Lehmann and B. Stella and U. Timm and W. Wagner and Waloschek and Winter, {G. G.} and W. Zimmermann and O. Achterberg and V. Blobel and L. Boesten and H. Kapitza and B. Koppitz and W. L{\"u}hrsen and H. Spitzer and {van Staa}, R. and A. B{\"a}cker and S. Brandt and K. Derikum and C. Grupen and Meyer, {H. J.} and B. Neumann and G. Zech and Daum, {H. J.} and H. Meyer and O. Meyer and M. R{\"o}ssler and K. Wacker",

year = "1981",

month = jun,

doi = "10.1007/BF01547873",

language = "אנגלית",

volume = "8",

pages = "101--114",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "2",

}

Berger, C, Lackas, W, Raupach, F, Alexander, G, Bürger, J, Criegee, L, Dehne, HC, Devenish, R, Flügge, G, Franke, G, Gerke, C, Knies, G, Lehmann, E, Stella, B, Timm, U, Wagner, W, Waloschek, Winter, GG, Zimmermann, W, Achterberg, O, Blobel, V, Boesten, L, Kapitza, H, Koppitz, B, Lührsen, W, Spitzer, H, van Staa, R, Bäcker, A, Brandt, S, Derikum, K, Grupen, C, Meyer, HJ, Neumann, B, Zech, G, Daum, HJ, Meyer, H, Meyer, O, Rössler, M & Wacker, K 1981, 'Topology of the Υ-decay', European Physical Journal C, vol. 8, no. 2, pp. 101-114. https://doi.org/10.1007/BF01547873

Topology of the Υ-decay. / Berger, Ch; Lackas, W.; Raupach, F.; Alexander, G.; Bürger, J.; Criegee, L.; Dehne, H. C.; Devenish, R.; Flügge, G.; Franke, G.; Gerke, Ch; Knies, G.; Lehmann, E.; Stella, B.; Timm, U.; Wagner, W.; Waloschek; Winter, G. G.; Zimmermann, W.; Achterberg, O.; Blobel, V.; Boesten, L.; Kapitza, H.; Koppitz, B.; Lührsen, W.; Spitzer, H.; van Staa, R.; Bäcker, A.; Brandt, S.; Derikum, K.; Grupen, C.; Meyer, H. J.; Neumann, B.; Zech, G.; Daum, H. J.; Meyer, H.; Meyer, O.; Rössler, M.; Wacker, K.

In: European Physical Journal C, Vol. 8, No. 2, 06.1981, p. 101-114.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Topology of the Υ-decay

AU - Berger, Ch

AU - Lackas, W.

AU - Raupach, F.

AU - Alexander, G.

AU - Bürger, J.

AU - Criegee, L.

AU - Dehne, H. C.

AU - Devenish, R.

AU - Flügge, G.

AU - Franke, G.

AU - Gerke, Ch

AU - Knies, G.

AU - Lehmann, E.

AU - Stella, B.

AU - Timm, U.

AU - Wagner, W.

AU - Waloschek,

AU - Winter, G. G.

AU - Zimmermann, W.

AU - Achterberg, O.

AU - Blobel, V.

AU - Boesten, L.

AU - Kapitza, H.

AU - Koppitz, B.

AU - Lührsen, W.

AU - Spitzer, H.

AU - van Staa, R.

AU - Bäcker, A.

AU - Brandt, S.

AU - Derikum, K.

AU - Grupen, C.

AU - Meyer, H. J.

AU - Neumann, B.

AU - Zech, G.

AU - Daum, H. J.

AU - Meyer, H.

AU - Meyer, O.

AU - Rössler, M.

AU - Wacker, K.

PY - 1981/6

Y1 - 1981/6

N2 - Multihadron events resulting from e+e- annihilation at the Υ-resonance are analysed with respect to lowest order QCD which predicts a dominant Υ decay into three vector gluons. Smearing effects due to the gluon fragmentation are so large, however, that no clear 3-jet structure or flatness is expected in the hadron final state. Instead, Monte Carlo simulations predict event structures with thrust and triplicity distributions distinctly different from those of two quark-jet and of phase space like decay mechanisms. The data are in perfect agreement with the 3-vector gluon decay as predicted by QCD and exclude dominantly phase space like or 2-quark jet decays. Also, the decay into scalar gluons is excluded by the data. An upper limit for the Υ-decay into one photon and two gluons is obtained.

AB - Multihadron events resulting from e+e- annihilation at the Υ-resonance are analysed with respect to lowest order QCD which predicts a dominant Υ decay into three vector gluons. Smearing effects due to the gluon fragmentation are so large, however, that no clear 3-jet structure or flatness is expected in the hadron final state. Instead, Monte Carlo simulations predict event structures with thrust and triplicity distributions distinctly different from those of two quark-jet and of phase space like decay mechanisms. The data are in perfect agreement with the 3-vector gluon decay as predicted by QCD and exclude dominantly phase space like or 2-quark jet decays. Also, the decay into scalar gluons is excluded by the data. An upper limit for the Υ-decay into one photon and two gluons is obtained.

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U2 - 10.1007/BF01547873

DO - 10.1007/BF01547873

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AN - SCOPUS:34250247107

VL - 8

SP - 101

EP - 114

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 2

ER -

Topology of the Υ-decay

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