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; R. Ramcke; U. Schneekloth; G. Weber; K. Ambrus; S. Bethke; A. Dieckmann; G. Eckerlin; E. Elsen; J. Heintze; K. H. Hellenbrandt; S. 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

doi:10.1007/BF01556160

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. PetersenR. Ramcke, U. Schneekloth, G. Weber, K. Ambrus, S. Bethke, A. Dieckmann, G. Eckerlin, E. Elsen, J. Heintze, K. H. Hellenbrandt, S. 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

^*Corresponding author for this work

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

22 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 language	English
Pages (from-to)	15-25
Number of pages	11
Journal	Zeitschrift für Physik C Particles and Fields
Volume	36
Issue number	1
DOIs	https://doi.org/10.1007/BF01556160
Publication status	Published - 1987 Mar
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1007/BF01556160

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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., ... 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, 36(1), 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, 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

@article{4eed8a7f7f7e49318e6c1ea31a21da2f,

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

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 S. 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",

year = "1987",

month = mar,

doi = "10.1007/BF01556160",

language = "English",

volume = "36",

pages = "15--25",

journal = "Zeitschrift f{\"u}r Physik C Particles and Fields",

issn = "0170-9739",

publisher = "Springer New York",

number = "1",

}

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, S.

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

Y1 - 1987/3

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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U2 - 10.1007/BF01556160

DO - 10.1007/BF01556160

M3 - Article

AN - SCOPUS:30244435722

SN - 0170-9739

VL - 36

SP - 15

EP - 25

JO - Zeitschrift für Physik C Particles and Fields

JF - Zeitschrift für Physik C Particles and Fields

IS - 1

ER -

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

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