Search for leptoquarks and other new particles with lepton-hadron signature in e+e- interactions

W. Bartel, L. Becker, R. Felst, D. Haidt, G. Knies, H. Krehbiel, P. Laurikainen, N. Magnussen, R. Meinke, B. Naroska, J. Olsson, D. Schmidt, P. Steffen, T. Greenshaw, J. Hagemann, G. Heinzelmann, H. Kado, C. Kleinwort, M. Kuhlen, A. Petersen & 48 others R. Ramcke, U. Schneekloth, G. Weber, K. Ambrus, S. Bethke, A. Dieckmann, G. Eckerlin, E. Elsen, J. Heintze, K. H. Hellenbrandt, Sachio Komamiya, J. van Krogh, H. Rieseberg, H. v. d. Schmidt, L. Smolik, J. Spitzer, A. Wagner, M. Zimmer, C. K. Bowdery, A. J. Finch, F. Foster, G. Hughes, J. M. Nye, I. W. Walker, J. Allison, R. J. Barlow, J. Chrin, I. P. Duerdoth, F. K. Loebinger, A. A. Macbeth, H. E. Mills, P. G. Murphy, K. Stephens, P. Warming, R. G. Glasser, P. Hill, J. A.J. Skard, S. R. Wagner, G. T. Zorn, S. L. Cartwright, D. Clarke, R. Marshall, R. P. Middleton, T. Kawamoto, T. Kobayashi, M. Minowa, H. Takeda, S. Yamada

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Using the JADE detector at PETRA, a search for hadronic events with isolated leptons in e+e- annihilation was performed. No evidence was found for the production of leptoquarks or color octet leptons and mass limits were obtained. Three hadronic events, each of them with two isolated muons, were detected and found to be in agreement with predictions of the α4 QED process {Mathematical expression}. At the highest PETRA energies, {Mathematical expression}, five events with low thrust, T<0.8, and a muon at a large angle with respect to the thrust axis, |cos δ|<0.7, were observed. The number of such events expected from an extrapolation of control data at lower energies is 0.56±0.18. No satisfactory explanation for the excess in terms of background could be found. A corresponding excess of electron events was not seen.

Original languageEnglish
Pages (from-to)15-25
Number of pages11
JournalZeitschrift für Physik C Particles and Fields
Volume36
Issue number1
DOIs
Publication statusPublished - 1987 Mar 1
Externally publishedYes

Fingerprint

Extrapolation
leptons
signatures
Color
Detectors
Electrons
interactions
muons
low thrust
octets
thrust
extrapolation
color
energy
detectors
predictions
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Search for leptoquarks and other new particles with lepton-hadron signature in e+e- interactions. / Bartel, W.; Becker, L.; Felst, R.; Haidt, D.; Knies, G.; Krehbiel, H.; Laurikainen, P.; Magnussen, N.; Meinke, R.; Naroska, B.; Olsson, J.; Schmidt, D.; Steffen, P.; Greenshaw, T.; Hagemann, J.; Heinzelmann, G.; Kado, H.; Kleinwort, C.; Kuhlen, M.; Petersen, A.; Ramcke, R.; Schneekloth, U.; Weber, G.; Ambrus, K.; Bethke, S.; Dieckmann, A.; Eckerlin, G.; Elsen, E.; Heintze, J.; Hellenbrandt, K. H.; Komamiya, Sachio; van Krogh, J.; Rieseberg, H.; v. d. Schmidt, H.; Smolik, L.; Spitzer, J.; Wagner, A.; Zimmer, M.; Bowdery, C. K.; Finch, A. J.; Foster, F.; Hughes, G.; Nye, J. M.; Walker, I. W.; Allison, J.; Barlow, R. J.; Chrin, J.; Duerdoth, I. P.; Loebinger, F. K.; Macbeth, A. A.; Mills, H. E.; Murphy, P. G.; Stephens, K.; Warming, P.; Glasser, R. G.; Hill, P.; Skard, J. A.J.; Wagner, S. R.; Zorn, G. T.; Cartwright, S. L.; Clarke, D.; Marshall, R.; Middleton, R. P.; Kawamoto, T.; Kobayashi, T.; Minowa, M.; Takeda, H.; Yamada, S.

In: Zeitschrift für Physik C Particles and Fields, Vol. 36, No. 1, 01.03.1987, p. 15-25.

Research output: Contribution to journalArticle

Bartel, W, Becker, L, Felst, R, Haidt, D, Knies, G, Krehbiel, H, Laurikainen, P, Magnussen, N, Meinke, R, Naroska, B, Olsson, J, Schmidt, D, Steffen, P, Greenshaw, T, Hagemann, J, Heinzelmann, G, Kado, H, Kleinwort, C, Kuhlen, M, Petersen, A, Ramcke, R, Schneekloth, U, Weber, G, Ambrus, K, Bethke, S, Dieckmann, A, Eckerlin, G, Elsen, E, Heintze, J, Hellenbrandt, KH, Komamiya, S, van Krogh, J, Rieseberg, H, v. d. Schmidt, H, Smolik, L, Spitzer, J, Wagner, A, Zimmer, M, Bowdery, CK, Finch, AJ, Foster, F, Hughes, G, Nye, JM, Walker, IW, Allison, J, Barlow, RJ, Chrin, J, Duerdoth, IP, Loebinger, FK, Macbeth, AA, Mills, HE, Murphy, PG, Stephens, K, Warming, P, Glasser, RG, Hill, P, Skard, JAJ, Wagner, SR, Zorn, GT, Cartwright, SL, Clarke, D, Marshall, R, Middleton, RP, Kawamoto, T, Kobayashi, T, Minowa, M, Takeda, H & Yamada, S 1987, 'Search for leptoquarks and other new particles with lepton-hadron signature in e+e- interactions', Zeitschrift für Physik C Particles and Fields, vol. 36, no. 1, pp. 15-25. https://doi.org/10.1007/BF01556160
Bartel, W. ; Becker, L. ; Felst, R. ; Haidt, D. ; Knies, G. ; Krehbiel, H. ; Laurikainen, P. ; Magnussen, N. ; Meinke, R. ; Naroska, B. ; Olsson, J. ; Schmidt, D. ; Steffen, P. ; Greenshaw, T. ; Hagemann, J. ; Heinzelmann, G. ; Kado, H. ; Kleinwort, C. ; Kuhlen, M. ; Petersen, A. ; Ramcke, R. ; Schneekloth, U. ; Weber, G. ; Ambrus, K. ; Bethke, S. ; Dieckmann, A. ; Eckerlin, G. ; Elsen, E. ; Heintze, J. ; Hellenbrandt, K. H. ; Komamiya, Sachio ; van Krogh, J. ; Rieseberg, H. ; v. d. Schmidt, H. ; Smolik, L. ; Spitzer, J. ; Wagner, A. ; Zimmer, M. ; Bowdery, C. K. ; Finch, A. J. ; Foster, F. ; Hughes, G. ; Nye, J. M. ; Walker, I. W. ; Allison, J. ; Barlow, R. J. ; Chrin, J. ; Duerdoth, I. P. ; Loebinger, F. K. ; Macbeth, A. A. ; Mills, H. E. ; Murphy, P. G. ; Stephens, K. ; Warming, P. ; Glasser, R. G. ; Hill, P. ; Skard, J. A.J. ; Wagner, S. R. ; Zorn, G. T. ; Cartwright, S. L. ; Clarke, D. ; Marshall, R. ; Middleton, R. P. ; Kawamoto, T. ; Kobayashi, T. ; Minowa, M. ; Takeda, H. ; Yamada, S. / Search for leptoquarks and other new particles with lepton-hadron signature in e+e- interactions. In: Zeitschrift für Physik C Particles and Fields. 1987 ; Vol. 36, No. 1. pp. 15-25.
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abstract = "Using the JADE detector at PETRA, a search for hadronic events with isolated leptons in e+e- annihilation was performed. No evidence was found for the production of leptoquarks or color octet leptons and mass limits were obtained. Three hadronic events, each of them with two isolated muons, were detected and found to be in agreement with predictions of the α4 QED process {Mathematical expression}. At the highest PETRA energies, {Mathematical expression}, five events with low thrust, T<0.8, and a muon at a large angle with respect to the thrust axis, |cos δ|<0.7, were observed. The number of such events expected from an extrapolation of control data at lower energies is 0.56±0.18. No satisfactory explanation for the excess in terms of background could be found. A corresponding excess of electron events was not seen.",
author = "W. Bartel and L. Becker and R. Felst and D. Haidt and G. Knies and H. Krehbiel and P. Laurikainen and N. Magnussen and R. Meinke and B. Naroska and J. Olsson and D. Schmidt and P. Steffen and T. Greenshaw and J. Hagemann and G. Heinzelmann and H. Kado and C. Kleinwort and M. Kuhlen and A. Petersen and R. Ramcke and U. Schneekloth and G. Weber and K. Ambrus and S. Bethke and A. Dieckmann and G. Eckerlin and E. Elsen and J. Heintze and Hellenbrandt, {K. H.} and Sachio Komamiya and {van Krogh}, J. and H. Rieseberg and {v. d. Schmidt}, H. and L. Smolik and J. Spitzer and A. Wagner and M. Zimmer and Bowdery, {C. K.} and Finch, {A. J.} and F. Foster and G. Hughes and Nye, {J. M.} and Walker, {I. W.} and J. Allison and Barlow, {R. J.} and J. Chrin and Duerdoth, {I. P.} and Loebinger, {F. K.} and Macbeth, {A. A.} and Mills, {H. E.} and Murphy, {P. G.} and K. Stephens and P. Warming and Glasser, {R. G.} and P. Hill and Skard, {J. A.J.} and Wagner, {S. R.} and Zorn, {G. T.} and Cartwright, {S. L.} and D. Clarke and R. Marshall and Middleton, {R. P.} and T. Kawamoto and T. Kobayashi and M. Minowa and H. Takeda and S. Yamada",
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TY - JOUR

T1 - Search for leptoquarks and other new particles with lepton-hadron signature in e+e- interactions

AU - Bartel, W.

AU - Becker, L.

AU - Felst, R.

AU - Haidt, D.

AU - Knies, G.

AU - Krehbiel, H.

AU - Laurikainen, P.

AU - Magnussen, N.

AU - Meinke, R.

AU - Naroska, B.

AU - Olsson, J.

AU - Schmidt, D.

AU - Steffen, P.

AU - Greenshaw, T.

AU - Hagemann, J.

AU - Heinzelmann, G.

AU - Kado, H.

AU - Kleinwort, C.

AU - Kuhlen, M.

AU - Petersen, A.

AU - Ramcke, R.

AU - Schneekloth, U.

AU - Weber, G.

AU - Ambrus, K.

AU - Bethke, S.

AU - Dieckmann, A.

AU - Eckerlin, G.

AU - Elsen, E.

AU - Heintze, J.

AU - Hellenbrandt, K. H.

AU - Komamiya, Sachio

AU - van Krogh, J.

AU - Rieseberg, H.

AU - v. d. Schmidt, H.

AU - Smolik, L.

AU - Spitzer, J.

AU - Wagner, A.

AU - Zimmer, M.

AU - Bowdery, C. K.

AU - Finch, A. J.

AU - Foster, F.

AU - Hughes, G.

AU - Nye, J. M.

AU - Walker, I. W.

AU - Allison, J.

AU - Barlow, R. J.

AU - Chrin, J.

AU - Duerdoth, I. P.

AU - Loebinger, F. K.

AU - Macbeth, A. A.

AU - Mills, H. E.

AU - Murphy, P. G.

AU - Stephens, K.

AU - Warming, P.

AU - Glasser, R. G.

AU - Hill, P.

AU - Skard, J. A.J.

AU - Wagner, S. R.

AU - Zorn, G. T.

AU - Cartwright, S. L.

AU - Clarke, D.

AU - Marshall, R.

AU - Middleton, R. P.

AU - Kawamoto, T.

AU - Kobayashi, T.

AU - Minowa, M.

AU - Takeda, H.

AU - Yamada, S.

PY - 1987/3/1

Y1 - 1987/3/1

N2 - Using the JADE detector at PETRA, a search for hadronic events with isolated leptons in e+e- annihilation was performed. No evidence was found for the production of leptoquarks or color octet leptons and mass limits were obtained. Three hadronic events, each of them with two isolated muons, were detected and found to be in agreement with predictions of the α4 QED process {Mathematical expression}. At the highest PETRA energies, {Mathematical expression}, five events with low thrust, T<0.8, and a muon at a large angle with respect to the thrust axis, |cos δ|<0.7, were observed. The number of such events expected from an extrapolation of control data at lower energies is 0.56±0.18. No satisfactory explanation for the excess in terms of background could be found. A corresponding excess of electron events was not seen.

AB - Using the JADE detector at PETRA, a search for hadronic events with isolated leptons in e+e- annihilation was performed. No evidence was found for the production of leptoquarks or color octet leptons and mass limits were obtained. Three hadronic events, each of them with two isolated muons, were detected and found to be in agreement with predictions of the α4 QED process {Mathematical expression}. At the highest PETRA energies, {Mathematical expression}, five events with low thrust, T<0.8, and a muon at a large angle with respect to the thrust axis, |cos δ|<0.7, were observed. The number of such events expected from an extrapolation of control data at lower energies is 0.56±0.18. No satisfactory explanation for the excess in terms of background could be found. A corresponding excess of electron events was not seen.

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DO - 10.1007/BF01556160

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JO - European Physical Journal C

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