A study of the reaction e+e-→γγ at LEP

M. Z. Akrawy, G. Alexander, J. Allison, P. P. Allport, K. J. Anderson, J. C. Armitage, G. T.J. Arnison, P. Ashton, G. Azuelos, J. T.M. Baines, A. H. Ball, J. Banks, G. J. Barker, R. J. Barlow, J. R. Batley, J. Becker, T. Behnke, K. W. Bell, G. Bella, S. Bethke & 256 others O. Biebel, U. Binder, I. J. Bloodworth, P. Bock, H. Breuker, R. M. Brown, R. Brun, A. Buijs, H. J. Burckhart, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, J. T.M. Chrin, I. Cohen, W. J. Collins, J. E. Conboy, M. Couch, M. Coupland, M. Cuffiani, S. Dado, G. M. Dallavalle, M. M. Deninno, A. Dieckmann, M. Dittmar, M. S. Dixit, E. Duchovni, I. P. Duerdoth, D. Dumas, H. El Mamouni, P. A. Elcombe, P. G. Estabrooks, E. Etzion, F. Fabbri, P. Farthouat, H. M. Fischer, D. G. Fong, M. T. French, C. Fukunaga, B. Gandois, O. Ganel, J. W. Gary, J. Gascon, N. I. Geddes, C. N.P. Gee, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, G. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, M. J. Goodrick, W. Gorn, D. Granite, E. Gross, P. Grosse-Wiesmann, J. Grunhaus, H. Hagedorn, J. Hagemann, M. Hansroul, C. K. Hargrove, J. Hart, P. M. Hattersley, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, R. D. Heuer, J. C. Hill, S. J. Hillier, C. Ho, J. D. Hobbs, P. R. Hobson, D. Hochman, B. Holl, R. J. Homer, S. R. Hou, C. P. Howarth, R. E. Hughes-Jones, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jobes, R. W.L. Jones, P. Jovanovic, D. Karlen, Kiyotomo Kawagoe, T. Kawamoto, R. G. Kellogg, B. W. Kennedy, C. Kleinwort, D. E. Klem, G. Knop, T. Kobayashi, T. P. Kokott, L. Köpke, R. Kowalewski, H. Kreutzmann, J. Kroll, M. Kuwano, P. Kyberd, G. D. Lafferty, F. Lamarche, W. J. Larson, M. M.B. Lasota, J. G. Layter, P. Le Du, P. Leblanc, A. M. Lee, D. Lellouch, P. Lennert, L. Lessard, L. Levinson, S. L. Lloyd, F. K. Loebinger, J. M. Lorah, B. Lorazo, M. J. Losty, J. Ludwig, N. Lupu, J. Ma, A. A. Macbeth, M. Mannelli, S. Marcellini, G. Maringer, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, T. J. McMahon, A. C. McPherson, F. Meijers, D. Menszner, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, D. J. Miller, C. Milstene, M. Minowa, W. Mohr, A. Montanari, T. Mori, M. W. Moss, A. Muller, P. G. Murphy, W. J. Murray, B. Nellen, H. H. Nguyen, M. Nozaki, A. J.P. O'Dowd, S. W. O'Neale, B. P. O'Neill, F. G. Oakham, F. Odorici, M. Ogg, H. Oh, M. J. Oreglia, S. Orito, G. N. Patrick, S. J. Pawley, P. Pfister, J. E. Pilcher, J. L. Pinfold, D. E. Plane, B. Poli, A. Pouladdej, T. W. Pritchard, G. Quast, J. Raab, M. W. Redmond, D. L. Rees, M. Regimbald, K. Riles, C. M. Roach, S. A. Robins, A. Rollnik, J. M. Roney, S. Rossberg, A. M. Rossi, P. Routenburg, K. Runge, O. Runolfsson, S. Sanghera, R. A. Sansum, M. Sasaki, B. J. Saunders, A. D. Schaile, O. Schaile, W. Schappert, P. Scharff-Hansen, S. Schreiber, J. Schwarz, A. Shapira, B. C. Shen, P. Sherwood, A. Simon, G. P. Siroli, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, E. J. Spreadbury, R. W. Springer, M. Sproston, K. Stephens, H. E. Stier, R. Ströhmer, D. Strom, H. Takeda, T. Takeshita, T. Tsukomoto, M. F. Turner, G. Tysarczyk-Niemeyer, D. Van Den Plas, G. J. Vandalen, C. J. Virtue, H. Von Der Schmitt, J. Von Krogh, A. Wagner, C. Wahl, C. P. Ward, D. R. Ward, J. Waterhouse, P. M. Watkins, A. T. Watson, N. K. Watson, M. Weber, S. Weisz, N. Wermes, M. Weymann, G. W. Wilson, J. A. Wilson, I. Wingerter, V. H. Winterer, N. C. Wood, S. Wotton, B. Wuensch, T. R. Wyatt, R. Yaari, Y. Yang, G. Yekutieli, T. Yoshida, W. Zeuner, G. T. Zorn, S. Zylberajch

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The pure QED reaction e+e-→γγ has been studied at centre of mass energies around the mass of the Z0 boson using data recorded by the OPAL detector at LEP. The results are in good agreement with the QED prediction. Lower limits on the cutoff parameters of the modified electron propagator are found to be Λ+>89 GeV and Λ. The lower limit on the mass of an excited electron is 82 GeV assuming the coupling constant λ=1. Upper limits on the branching ratios of Z0→γγ, Z0→π0γ and Z0→ηγ are set at 3.7×10-4, 3.9×10-4 and 5.8×10-4 respectively. Two events from the reaction e+e-→γγγ have been observed, consistent with the QED prediction. An upper limit on the branching ratio of Z0→γγγ is set at 2.8×10-4. All the limits are given at 95% confidence level.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalPhysics Letters B
Volume241
Issue number1
DOIs
Publication statusPublished - May 3 1990

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predictions
center of mass
confidence
electrons
cut-off
bosons
propagation
detectors
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Akrawy, M. Z., Alexander, G., Allison, J., Allport, P. P., Anderson, K. J., Armitage, J. C., ... Zylberajch, S. (1990). A study of the reaction e+e-→γγ at LEP. Physics Letters B, 241(1), 133-140. https://doi.org/10.1016/0370-2693(90)91500-B

A study of the reaction e+e-→γγ at LEP. / Akrawy, M. Z.; Alexander, G.; Allison, J.; Allport, P. P.; Anderson, K. J.; Armitage, J. C.; Arnison, G. T.J.; Ashton, P.; Azuelos, G.; Baines, J. T.M.; Ball, A. H.; Banks, J.; Barker, G. J.; Barlow, R. J.; Batley, J. R.; Becker, J.; Behnke, T.; Bell, K. W.; Bella, G.; Bethke, S.; Biebel, O.; Binder, U.; Bloodworth, I. J.; Bock, P.; Breuker, H.; Brown, R. M.; Brun, R.; Buijs, A.; Burckhart, H. J.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Chrin, J. T.M.; Cohen, I.; Collins, W. J.; Conboy, J. E.; Couch, M.; Coupland, M.; Cuffiani, M.; Dado, S.; Dallavalle, G. M.; Deninno, M. M.; Dieckmann, A.; Dittmar, M.; Dixit, M. S.; Duchovni, E.; Duerdoth, I. P.; Dumas, D.; El Mamouni, H.; Elcombe, P. A.; Estabrooks, P. G.; Etzion, E.; Fabbri, F.; Farthouat, P.; Fischer, H. M.; Fong, D. G.; French, M. T.; Fukunaga, C.; Gandois, B.; Ganel, O.; Gary, J. W.; Gascon, J.; Geddes, N. I.; Gee, C. N.P.; Geich-Gimbel, C.; Gensler, S. W.; Gentit, F. X.; Giacomelli, G.; Gibson, V.; Gibson, W. R.; Gillies, J. D.; Goldberg, J.; Goodrick, M. J.; Gorn, W.; Granite, D.; Gross, E.; Grosse-Wiesmann, P.; Grunhaus, J.; Hagedorn, H.; Hagemann, J.; Hansroul, M.; Hargrove, C. K.; Hart, J.; Hattersley, P. M.; Hauschild, M.; Hawkes, C. M.; Heflin, E.; Hemingway, R. J.; Heuer, R. D.; Hill, J. C.; Hillier, S. J.; Ho, C.; Hobbs, J. D.; Hobson, P. R.; Hochman, D.; Holl, B.; Homer, R. J.; Hou, S. R.; Howarth, C. P.; Hughes-Jones, R. E.; Igo-Kemenes, P.; Ihssen, H.; Imrie, D. C.; Jawahery, A.; Jeffreys, P. W.; Jeremie, H.; Jimack, M.; Jobes, M.; Jones, R. W.L.; Jovanovic, P.; Karlen, D.; Kawagoe, Kiyotomo; Kawamoto, T.; Kellogg, R. G.; Kennedy, B. W.; Kleinwort, C.; Klem, D. E.; Knop, G.; Kobayashi, T.; Kokott, T. P.; Köpke, L.; Kowalewski, R.; Kreutzmann, H.; Kroll, J.; Kuwano, M.; Kyberd, P.; Lafferty, G. D.; Lamarche, F.; Larson, W. J.; Lasota, M. M.B.; Layter, J. G.; Le Du, P.; Leblanc, P.; Lee, A. M.; Lellouch, D.; Lennert, P.; Lessard, L.; Levinson, L.; Lloyd, S. L.; Loebinger, F. K.; Lorah, J. M.; Lorazo, B.; Losty, M. J.; Ludwig, J.; Lupu, N.; Ma, J.; Macbeth, A. A.; Mannelli, M.; Marcellini, S.; Maringer, G.; Martin, A. J.; Martin, J. P.; Mashimo, T.; Mättig, P.; Maur, U.; McMahon, T. J.; McPherson, A. C.; Meijers, F.; Menszner, D.; Merritt, F. S.; Mes, H.; Michelini, A.; Middleton, R. P.; Mikenberg, G.; Miller, D. J.; Milstene, C.; Minowa, M.; Mohr, W.; Montanari, A.; Mori, T.; Moss, M. W.; Muller, A.; Murphy, P. G.; Murray, W. J.; Nellen, B.; Nguyen, H. H.; Nozaki, M.; O'Dowd, A. J.P.; O'Neale, S. W.; O'Neill, B. P.; Oakham, F. G.; Odorici, F.; Ogg, M.; Oh, H.; Oreglia, M. J.; Orito, S.; Patrick, G. N.; Pawley, S. J.; Pfister, P.; Pilcher, J. E.; Pinfold, J. L.; Plane, D. E.; Poli, B.; Pouladdej, A.; Pritchard, T. W.; Quast, G.; Raab, J.; Redmond, M. W.; Rees, D. L.; Regimbald, M.; Riles, K.; Roach, C. M.; Robins, S. A.; Rollnik, A.; Roney, J. M.; Rossberg, S.; Rossi, A. M.; Routenburg, P.; Runge, K.; Runolfsson, O.; Sanghera, S.; Sansum, R. A.; Sasaki, M.; Saunders, B. J.; Schaile, A. D.; Schaile, O.; Schappert, W.; Scharff-Hansen, P.; Schreiber, S.; Schwarz, J.; Shapira, A.; Shen, B. C.; Sherwood, P.; Simon, A.; Siroli, G. P.; Skuja, A.; Smith, A. M.; Smith, T. J.; Snow, G. A.; Spreadbury, E. J.; Springer, R. W.; Sproston, M.; Stephens, K.; Stier, H. E.; Ströhmer, R.; Strom, D.; Takeda, H.; Takeshita, T.; Tsukomoto, T.; Turner, M. F.; Tysarczyk-Niemeyer, G.; Van Den Plas, D.; Vandalen, G. J.; Virtue, C. J.; Von Der Schmitt, H.; Von Krogh, J.; Wagner, A.; Wahl, C.; Ward, C. P.; Ward, D. R.; Waterhouse, J.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Weber, M.; Weisz, S.; Wermes, N.; Weymann, M.; Wilson, G. W.; Wilson, J. A.; Wingerter, I.; Winterer, V. H.; Wood, N. C.; Wotton, S.; Wuensch, B.; Wyatt, T. R.; Yaari, R.; Yang, Y.; Yekutieli, G.; Yoshida, T.; Zeuner, W.; Zorn, G. T.; Zylberajch, S.

In: Physics Letters B, Vol. 241, No. 1, 03.05.1990, p. 133-140.

Research output: Contribution to journalArticle

Akrawy, MZ, Alexander, G, Allison, J, Allport, PP, Anderson, KJ, Armitage, JC, Arnison, GTJ, Ashton, P, Azuelos, G, Baines, JTM, Ball, AH, Banks, J, Barker, GJ, Barlow, RJ, Batley, JR, Becker, J, Behnke, T, Bell, KW, Bella, G, Bethke, S, Biebel, O, Binder, U, Bloodworth, IJ, Bock, P, Breuker, H, Brown, RM, Brun, R, Buijs, A, Burckhart, HJ, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrin, JTM, Cohen, I, Collins, WJ, Conboy, JE, Couch, M, Coupland, M, Cuffiani, M, Dado, S, Dallavalle, GM, Deninno, MM, Dieckmann, A, Dittmar, M, Dixit, MS, Duchovni, E, Duerdoth, IP, Dumas, D, El Mamouni, H, Elcombe, PA, Estabrooks, PG, Etzion, E, Fabbri, F, Farthouat, P, Fischer, HM, Fong, DG, French, MT, Fukunaga, C, Gandois, B, Ganel, O, Gary, JW, Gascon, J, Geddes, NI, Gee, CNP, Geich-Gimbel, C, Gensler, SW, Gentit, FX, Giacomelli, G, Gibson, V, Gibson, WR, Gillies, JD, Goldberg, J, Goodrick, MJ, Gorn, W, Granite, D, Gross, E, Grosse-Wiesmann, P, Grunhaus, J, Hagedorn, H, Hagemann, J, Hansroul, M, Hargrove, CK, Hart, J, Hattersley, PM, Hauschild, M, Hawkes, CM, Heflin, E, Hemingway, RJ, Heuer, RD, Hill, JC, Hillier, SJ, Ho, C, Hobbs, JD, Hobson, PR, Hochman, D, Holl, B, Homer, RJ, Hou, SR, Howarth, CP, Hughes-Jones, RE, Igo-Kemenes, P, Ihssen, H, Imrie, DC, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Jobes, M, Jones, RWL, Jovanovic, P, Karlen, D, Kawagoe, K, Kawamoto, T, Kellogg, RG, Kennedy, BW, Kleinwort, C, Klem, DE, Knop, G, Kobayashi, T, Kokott, TP, Köpke, L, Kowalewski, R, Kreutzmann, H, Kroll, J, Kuwano, M, Kyberd, P, Lafferty, GD, Lamarche, F, Larson, WJ, Lasota, MMB, Layter, JG, Le Du, P, Leblanc, P, Lee, AM, Lellouch, D, Lennert, P, Lessard, L, Levinson, L, Lloyd, SL, Loebinger, FK, Lorah, JM, Lorazo, B, Losty, MJ, Ludwig, J, Lupu, N, Ma, J, Macbeth, AA, Mannelli, M, Marcellini, S, Maringer, G, Martin, AJ, Martin, JP, Mashimo, T, Mättig, P, Maur, U, McMahon, TJ, McPherson, AC, Meijers, F, Menszner, D, Merritt, FS, Mes, H, Michelini, A, Middleton, RP, Mikenberg, G, Miller, DJ, Milstene, C, Minowa, M, Mohr, W, Montanari, A, Mori, T, Moss, MW, Muller, A, Murphy, PG, Murray, WJ, Nellen, B, Nguyen, HH, Nozaki, M, O'Dowd, AJP, O'Neale, SW, O'Neill, BP, Oakham, FG, Odorici, F, Ogg, M, Oh, H, Oreglia, MJ, Orito, S, Patrick, GN, Pawley, SJ, Pfister, P, Pilcher, JE, Pinfold, JL, Plane, DE, Poli, B, Pouladdej, A, Pritchard, TW, Quast, G, Raab, J, Redmond, MW, Rees, DL, Regimbald, M, Riles, K, Roach, CM, Robins, SA, Rollnik, A, Roney, JM, Rossberg, S, Rossi, AM, Routenburg, P, Runge, K, Runolfsson, O, Sanghera, S, Sansum, RA, Sasaki, M, Saunders, BJ, Schaile, AD, Schaile, O, Schappert, W, Scharff-Hansen, P, Schreiber, S, Schwarz, J, Shapira, A, Shen, BC, Sherwood, P, Simon, A, Siroli, GP, Skuja, A, Smith, AM, Smith, TJ, Snow, GA, Spreadbury, EJ, Springer, RW, Sproston, M, Stephens, K, Stier, HE, Ströhmer, R, Strom, D, Takeda, H, Takeshita, T, Tsukomoto, T, Turner, MF, Tysarczyk-Niemeyer, G, Van Den Plas, D, Vandalen, GJ, Virtue, CJ, Von Der Schmitt, H, Von Krogh, J, Wagner, A, Wahl, C, Ward, CP, Ward, DR, Waterhouse, J, Watkins, PM, Watson, AT, Watson, NK, Weber, M, Weisz, S, Wermes, N, Weymann, M, Wilson, GW, Wilson, JA, Wingerter, I, Winterer, VH, Wood, NC, Wotton, S, Wuensch, B, Wyatt, TR, Yaari, R, Yang, Y, Yekutieli, G, Yoshida, T, Zeuner, W, Zorn, GT & Zylberajch, S 1990, 'A study of the reaction e+e-→γγ at LEP', Physics Letters B, vol. 241, no. 1, pp. 133-140. https://doi.org/10.1016/0370-2693(90)91500-B
Akrawy MZ, Alexander G, Allison J, Allport PP, Anderson KJ, Armitage JC et al. A study of the reaction e+e-→γγ at LEP. Physics Letters B. 1990 May 3;241(1):133-140. https://doi.org/10.1016/0370-2693(90)91500-B
Akrawy, M. Z. ; Alexander, G. ; Allison, J. ; Allport, P. P. ; Anderson, K. J. ; Armitage, J. C. ; Arnison, G. T.J. ; Ashton, P. ; Azuelos, G. ; Baines, J. T.M. ; Ball, A. H. ; Banks, J. ; Barker, G. J. ; Barlow, R. J. ; Batley, J. R. ; Becker, J. ; Behnke, T. ; Bell, K. W. ; Bella, G. ; Bethke, S. ; Biebel, O. ; Binder, U. ; Bloodworth, I. J. ; Bock, P. ; Breuker, H. ; Brown, R. M. ; Brun, R. ; Buijs, A. ; Burckhart, H. J. ; Capiluppi, P. ; Carnegie, R. K. ; Carter, A. A. ; Carter, J. R. ; Chang, C. Y. ; Charlton, D. G. ; Chrin, J. T.M. ; Cohen, I. ; Collins, W. J. ; Conboy, J. E. ; Couch, M. ; Coupland, M. ; Cuffiani, M. ; Dado, S. ; Dallavalle, G. M. ; Deninno, M. M. ; Dieckmann, A. ; Dittmar, M. ; Dixit, M. S. ; Duchovni, E. ; Duerdoth, I. P. ; Dumas, D. ; El Mamouni, H. ; Elcombe, P. A. ; Estabrooks, P. G. ; Etzion, E. ; Fabbri, F. ; Farthouat, P. ; Fischer, H. M. ; Fong, D. G. ; French, M. T. ; Fukunaga, C. ; Gandois, B. ; Ganel, O. ; Gary, J. W. ; Gascon, J. ; Geddes, N. I. ; Gee, C. N.P. ; Geich-Gimbel, C. ; Gensler, S. W. ; Gentit, F. X. ; Giacomelli, G. ; Gibson, V. ; Gibson, W. R. ; Gillies, J. D. ; Goldberg, J. ; Goodrick, M. J. ; Gorn, W. ; Granite, D. ; Gross, E. ; Grosse-Wiesmann, P. ; Grunhaus, J. ; Hagedorn, H. ; Hagemann, J. ; Hansroul, M. ; Hargrove, C. K. ; Hart, J. ; Hattersley, P. M. ; Hauschild, M. ; Hawkes, C. M. ; Heflin, E. ; Hemingway, R. J. ; Heuer, R. D. ; Hill, J. C. ; Hillier, S. J. ; Ho, C. ; Hobbs, J. D. ; Hobson, P. R. ; Hochman, D. ; Holl, B. ; Homer, R. J. ; Hou, S. R. ; Howarth, C. P. ; Hughes-Jones, R. E. ; Igo-Kemenes, P. ; Ihssen, H. ; Imrie, D. C. ; Jawahery, A. ; Jeffreys, P. W. ; Jeremie, H. ; Jimack, M. ; Jobes, M. ; Jones, R. W.L. ; Jovanovic, P. ; Karlen, D. ; Kawagoe, Kiyotomo ; Kawamoto, T. ; Kellogg, R. G. ; Kennedy, B. W. ; Kleinwort, C. ; Klem, D. E. ; Knop, G. ; Kobayashi, T. ; Kokott, T. P. ; Köpke, L. ; Kowalewski, R. ; Kreutzmann, H. ; Kroll, J. ; Kuwano, M. ; Kyberd, P. ; Lafferty, G. D. ; Lamarche, F. ; Larson, W. J. ; Lasota, M. M.B. ; Layter, J. G. ; Le Du, P. ; Leblanc, P. ; Lee, A. M. ; Lellouch, D. ; Lennert, P. ; Lessard, L. ; Levinson, L. ; Lloyd, S. L. ; Loebinger, F. K. ; Lorah, J. M. ; Lorazo, B. ; Losty, M. J. ; Ludwig, J. ; Lupu, N. ; Ma, J. ; Macbeth, A. A. ; Mannelli, M. ; Marcellini, S. ; Maringer, G. ; Martin, A. J. ; Martin, J. P. ; Mashimo, T. ; Mättig, P. ; Maur, U. ; McMahon, T. J. ; McPherson, A. C. ; Meijers, F. ; Menszner, D. ; Merritt, F. S. ; Mes, H. ; Michelini, A. ; Middleton, R. P. ; Mikenberg, G. ; Miller, D. J. ; Milstene, C. ; Minowa, M. ; Mohr, W. ; Montanari, A. ; Mori, T. ; Moss, M. W. ; Muller, A. ; Murphy, P. G. ; Murray, W. J. ; Nellen, B. ; Nguyen, H. H. ; Nozaki, M. ; O'Dowd, A. J.P. ; O'Neale, S. W. ; O'Neill, B. P. ; Oakham, F. G. ; Odorici, F. ; Ogg, M. ; Oh, H. ; Oreglia, M. J. ; Orito, S. ; Patrick, G. N. ; Pawley, S. J. ; Pfister, P. ; Pilcher, J. E. ; Pinfold, J. L. ; Plane, D. E. ; Poli, B. ; Pouladdej, A. ; Pritchard, T. W. ; Quast, G. ; Raab, J. ; Redmond, M. W. ; Rees, D. L. ; Regimbald, M. ; Riles, K. ; Roach, C. M. ; Robins, S. A. ; Rollnik, A. ; Roney, J. M. ; Rossberg, S. ; Rossi, A. M. ; Routenburg, P. ; Runge, K. ; Runolfsson, O. ; Sanghera, S. ; Sansum, R. A. ; Sasaki, M. ; Saunders, B. J. ; Schaile, A. D. ; Schaile, O. ; Schappert, W. ; Scharff-Hansen, P. ; Schreiber, S. ; Schwarz, J. ; Shapira, A. ; Shen, B. C. ; Sherwood, P. ; Simon, A. ; Siroli, G. P. ; Skuja, A. ; Smith, A. M. ; Smith, T. J. ; Snow, G. A. ; Spreadbury, E. J. ; Springer, R. W. ; Sproston, M. ; Stephens, K. ; Stier, H. E. ; Ströhmer, R. ; Strom, D. ; Takeda, H. ; Takeshita, T. ; Tsukomoto, T. ; Turner, M. F. ; Tysarczyk-Niemeyer, G. ; Van Den Plas, D. ; Vandalen, G. J. ; Virtue, C. J. ; Von Der Schmitt, H. ; Von Krogh, J. ; Wagner, A. ; Wahl, C. ; Ward, C. P. ; Ward, D. R. ; Waterhouse, J. ; Watkins, P. M. ; Watson, A. T. ; Watson, N. K. ; Weber, M. ; Weisz, S. ; Wermes, N. ; Weymann, M. ; Wilson, G. W. ; Wilson, J. A. ; Wingerter, I. ; Winterer, V. H. ; Wood, N. C. ; Wotton, S. ; Wuensch, B. ; Wyatt, T. R. ; Yaari, R. ; Yang, Y. ; Yekutieli, G. ; Yoshida, T. ; Zeuner, W. ; Zorn, G. T. ; Zylberajch, S. / A study of the reaction e+e-→γγ at LEP. In: Physics Letters B. 1990 ; Vol. 241, No. 1. pp. 133-140.
@article{2ac03b96a1414244b8816316300ca115,
title = "A study of the reaction e+e-→γγ at LEP",
abstract = "The pure QED reaction e+e-→γγ has been studied at centre of mass energies around the mass of the Z0 boson using data recorded by the OPAL detector at LEP. The results are in good agreement with the QED prediction. Lower limits on the cutoff parameters of the modified electron propagator are found to be Λ+>89 GeV and Λ. The lower limit on the mass of an excited electron is 82 GeV assuming the coupling constant λ=1. Upper limits on the branching ratios of Z0→γγ, Z0→π0γ and Z0→ηγ are set at 3.7×10-4, 3.9×10-4 and 5.8×10-4 respectively. Two events from the reaction e+e-→γγγ have been observed, consistent with the QED prediction. An upper limit on the branching ratio of Z0→γγγ is set at 2.8×10-4. All the limits are given at 95{\%} confidence level.",
author = "Akrawy, {M. Z.} and G. Alexander and J. Allison and Allport, {P. P.} and Anderson, {K. J.} and Armitage, {J. C.} and Arnison, {G. T.J.} and P. Ashton and G. Azuelos and Baines, {J. T.M.} and Ball, {A. H.} and J. Banks and Barker, {G. J.} and Barlow, {R. J.} and Batley, {J. R.} and J. Becker and T. Behnke and Bell, {K. W.} and G. Bella and S. Bethke and O. Biebel and U. Binder and Bloodworth, {I. J.} and P. Bock and H. Breuker and Brown, {R. M.} and R. Brun and A. Buijs and Burckhart, {H. J.} and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and Chrin, {J. T.M.} and I. Cohen and Collins, {W. J.} and Conboy, {J. E.} and M. Couch and M. Coupland and M. Cuffiani and S. Dado and Dallavalle, {G. M.} and Deninno, {M. M.} and A. Dieckmann and M. Dittmar and Dixit, {M. S.} and E. Duchovni and Duerdoth, {I. P.} and D. Dumas and {El Mamouni}, H. and Elcombe, {P. A.} and Estabrooks, {P. G.} and E. Etzion and F. Fabbri and P. Farthouat and Fischer, {H. M.} and Fong, {D. G.} and French, {M. T.} and C. Fukunaga and B. Gandois and O. Ganel and Gary, {J. W.} and J. Gascon and Geddes, {N. I.} and Gee, {C. N.P.} and C. Geich-Gimbel and Gensler, {S. W.} and Gentit, {F. X.} and G. Giacomelli and V. Gibson and Gibson, {W. R.} and Gillies, {J. D.} and J. Goldberg and Goodrick, {M. J.} and W. Gorn and D. Granite and E. Gross and P. Grosse-Wiesmann and J. Grunhaus and H. Hagedorn and J. Hagemann and M. Hansroul and Hargrove, {C. K.} and J. Hart and Hattersley, {P. M.} and M. Hauschild and Hawkes, {C. M.} and E. Heflin and Hemingway, {R. J.} and Heuer, {R. D.} and Hill, {J. C.} and Hillier, {S. J.} and C. Ho and Hobbs, {J. D.} and Hobson, {P. R.} and D. Hochman and B. Holl and Homer, {R. J.} and Hou, {S. R.} and Howarth, {C. P.} and Hughes-Jones, {R. E.} and P. Igo-Kemenes and H. Ihssen and Imrie, {D. C.} and A. Jawahery and Jeffreys, {P. W.} and H. Jeremie and M. Jimack and M. Jobes and Jones, {R. W.L.} and P. Jovanovic and D. Karlen and Kiyotomo Kawagoe and T. Kawamoto and Kellogg, {R. G.} and Kennedy, {B. W.} and C. Kleinwort and Klem, {D. E.} and G. Knop and T. Kobayashi and Kokott, {T. P.} and L. K{\"o}pke and R. Kowalewski and H. Kreutzmann and J. Kroll and M. Kuwano and P. Kyberd and Lafferty, {G. D.} and F. Lamarche and Larson, {W. J.} and Lasota, {M. M.B.} and Layter, {J. G.} and {Le Du}, P. and P. Leblanc and Lee, {A. M.} and D. Lellouch and P. Lennert and L. Lessard and L. Levinson and Lloyd, {S. L.} and Loebinger, {F. K.} and Lorah, {J. M.} and B. Lorazo and Losty, {M. J.} and J. Ludwig and N. Lupu and J. Ma and Macbeth, {A. A.} and M. Mannelli and S. Marcellini and G. Maringer and Martin, {A. J.} and Martin, {J. P.} and T. Mashimo and P. M{\"a}ttig and U. Maur and McMahon, {T. J.} and McPherson, {A. C.} and F. Meijers and D. Menszner and Merritt, {F. S.} and H. Mes and A. Michelini and Middleton, {R. P.} and G. Mikenberg and Miller, {D. J.} and C. Milstene and M. Minowa and W. Mohr and A. Montanari and T. Mori and Moss, {M. W.} and A. Muller and Murphy, {P. G.} and Murray, {W. J.} and B. Nellen and Nguyen, {H. H.} and M. Nozaki and O'Dowd, {A. J.P.} and O'Neale, {S. W.} and O'Neill, {B. P.} and Oakham, {F. G.} and F. Odorici and M. Ogg and H. Oh and Oreglia, {M. J.} and S. Orito and Patrick, {G. N.} and Pawley, {S. J.} and P. Pfister and Pilcher, {J. E.} and Pinfold, {J. L.} and Plane, {D. E.} and B. Poli and A. Pouladdej and Pritchard, {T. W.} and G. Quast and J. Raab and Redmond, {M. W.} and Rees, {D. L.} and M. Regimbald and K. Riles and Roach, {C. M.} and Robins, {S. A.} and A. Rollnik and Roney, {J. M.} and S. Rossberg and Rossi, {A. M.} and P. Routenburg and K. Runge and O. Runolfsson and S. Sanghera and Sansum, {R. A.} and M. Sasaki and Saunders, {B. J.} and Schaile, {A. D.} and O. Schaile and W. Schappert and P. Scharff-Hansen and S. Schreiber and J. Schwarz and A. Shapira and Shen, {B. C.} and P. Sherwood and A. Simon and Siroli, {G. P.} and A. Skuja and Smith, {A. M.} and Smith, {T. J.} and Snow, {G. A.} and Spreadbury, {E. J.} and Springer, {R. W.} and M. Sproston and K. Stephens and Stier, {H. E.} and R. Str{\"o}hmer and D. Strom and H. Takeda and T. Takeshita and T. Tsukomoto and Turner, {M. F.} and G. Tysarczyk-Niemeyer and {Van Den Plas}, D. and Vandalen, {G. J.} and Virtue, {C. J.} and {Von Der Schmitt}, H. and {Von Krogh}, J. and A. Wagner and C. Wahl and Ward, {C. P.} and Ward, {D. R.} and J. Waterhouse and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and M. Weber and S. Weisz and N. Wermes and M. Weymann and Wilson, {G. W.} and Wilson, {J. A.} and I. Wingerter and Winterer, {V. H.} and Wood, {N. C.} and S. Wotton and B. Wuensch and Wyatt, {T. R.} and R. Yaari and Y. Yang and G. Yekutieli and T. Yoshida and W. Zeuner and Zorn, {G. T.} and S. Zylberajch",
year = "1990",
month = "5",
day = "3",
doi = "10.1016/0370-2693(90)91500-B",
language = "English",
volume = "241",
pages = "133--140",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - A study of the reaction e+e-→γγ at LEP

AU - Akrawy, M. Z.

AU - Alexander, G.

AU - Allison, J.

AU - Allport, P. P.

AU - Anderson, K. J.

AU - Armitage, J. C.

AU - Arnison, G. T.J.

AU - Ashton, P.

AU - Azuelos, G.

AU - Baines, J. T.M.

AU - Ball, A. H.

AU - Banks, J.

AU - Barker, G. J.

AU - Barlow, R. J.

AU - Batley, J. R.

AU - Becker, J.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bethke, S.

AU - Biebel, O.

AU - Binder, U.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Breuker, H.

AU - Brown, R. M.

AU - Brun, R.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Chrin, J. T.M.

AU - Cohen, I.

AU - Collins, W. J.

AU - Conboy, J. E.

AU - Couch, M.

AU - Coupland, M.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallavalle, G. M.

AU - Deninno, M. M.

AU - Dieckmann, A.

AU - Dittmar, M.

AU - Dixit, M. S.

AU - Duchovni, E.

AU - Duerdoth, I. P.

AU - Dumas, D.

AU - El Mamouni, H.

AU - Elcombe, P. A.

AU - Estabrooks, P. G.

AU - Etzion, E.

AU - Fabbri, F.

AU - Farthouat, P.

AU - Fischer, H. M.

AU - Fong, D. G.

AU - French, M. T.

AU - Fukunaga, C.

AU - Gandois, B.

AU - Ganel, O.

AU - Gary, J. W.

AU - Gascon, J.

AU - Geddes, N. I.

AU - Gee, C. N.P.

AU - Geich-Gimbel, C.

AU - Gensler, S. W.

AU - Gentit, F. X.

AU - Giacomelli, G.

AU - Gibson, V.

AU - Gibson, W. R.

AU - Gillies, J. D.

AU - Goldberg, J.

AU - Goodrick, M. J.

AU - Gorn, W.

AU - Granite, D.

AU - Gross, E.

AU - Grosse-Wiesmann, P.

AU - Grunhaus, J.

AU - Hagedorn, H.

AU - Hagemann, J.

AU - Hansroul, M.

AU - Hargrove, C. K.

AU - Hart, J.

AU - Hattersley, P. M.

AU - Hauschild, M.

AU - Hawkes, C. M.

AU - Heflin, E.

AU - Hemingway, R. J.

AU - Heuer, R. D.

AU - Hill, J. C.

AU - Hillier, S. J.

AU - Ho, C.

AU - Hobbs, J. D.

AU - Hobson, P. R.

AU - Hochman, D.

AU - Holl, B.

AU - Homer, R. J.

AU - Hou, S. R.

AU - Howarth, C. P.

AU - Hughes-Jones, R. E.

AU - Igo-Kemenes, P.

AU - Ihssen, H.

AU - Imrie, D. C.

AU - Jawahery, A.

AU - Jeffreys, P. W.

AU - Jeremie, H.

AU - Jimack, M.

AU - Jobes, M.

AU - Jones, R. W.L.

AU - Jovanovic, P.

AU - Karlen, D.

AU - Kawagoe, Kiyotomo

AU - Kawamoto, T.

AU - Kellogg, R. G.

AU - Kennedy, B. W.

AU - Kleinwort, C.

AU - Klem, D. E.

AU - Knop, G.

AU - Kobayashi, T.

AU - Kokott, T. P.

AU - Köpke, L.

AU - Kowalewski, R.

AU - Kreutzmann, H.

AU - Kroll, J.

AU - Kuwano, M.

AU - Kyberd, P.

AU - Lafferty, G. D.

AU - Lamarche, F.

AU - Larson, W. J.

AU - Lasota, M. M.B.

AU - Layter, J. G.

AU - Le Du, P.

AU - Leblanc, P.

AU - Lee, A. M.

AU - Lellouch, D.

AU - Lennert, P.

AU - Lessard, L.

AU - Levinson, L.

AU - Lloyd, S. L.

AU - Loebinger, F. K.

AU - Lorah, J. M.

AU - Lorazo, B.

AU - Losty, M. J.

AU - Ludwig, J.

AU - Lupu, N.

AU - Ma, J.

AU - Macbeth, A. A.

AU - Mannelli, M.

AU - Marcellini, S.

AU - Maringer, G.

AU - Martin, A. J.

AU - Martin, J. P.

AU - Mashimo, T.

AU - Mättig, P.

AU - Maur, U.

AU - McMahon, T. J.

AU - McPherson, A. C.

AU - Meijers, F.

AU - Menszner, D.

AU - Merritt, F. S.

AU - Mes, H.

AU - Michelini, A.

AU - Middleton, R. P.

AU - Mikenberg, G.

AU - Miller, D. J.

AU - Milstene, C.

AU - Minowa, M.

AU - Mohr, W.

AU - Montanari, A.

AU - Mori, T.

AU - Moss, M. W.

AU - Muller, A.

AU - Murphy, P. G.

AU - Murray, W. J.

AU - Nellen, B.

AU - Nguyen, H. H.

AU - Nozaki, M.

AU - O'Dowd, A. J.P.

AU - O'Neale, S. W.

AU - O'Neill, B. P.

AU - Oakham, F. G.

AU - Odorici, F.

AU - Ogg, M.

AU - Oh, H.

AU - Oreglia, M. J.

AU - Orito, S.

AU - Patrick, G. N.

AU - Pawley, S. J.

AU - Pfister, P.

AU - Pilcher, J. E.

AU - Pinfold, J. L.

AU - Plane, D. E.

AU - Poli, B.

AU - Pouladdej, A.

AU - Pritchard, T. W.

AU - Quast, G.

AU - Raab, J.

AU - Redmond, M. W.

AU - Rees, D. L.

AU - Regimbald, M.

AU - Riles, K.

AU - Roach, C. M.

AU - Robins, S. A.

AU - Rollnik, A.

AU - Roney, J. M.

AU - Rossberg, S.

AU - Rossi, A. M.

AU - Routenburg, P.

AU - Runge, K.

AU - Runolfsson, O.

AU - Sanghera, S.

AU - Sansum, R. A.

AU - Sasaki, M.

AU - Saunders, B. J.

AU - Schaile, A. D.

AU - Schaile, O.

AU - Schappert, W.

AU - Scharff-Hansen, P.

AU - Schreiber, S.

AU - Schwarz, J.

AU - Shapira, A.

AU - Shen, B. C.

AU - Sherwood, P.

AU - Simon, A.

AU - Siroli, G. P.

AU - Skuja, A.

AU - Smith, A. M.

AU - Smith, T. J.

AU - Snow, G. A.

AU - Spreadbury, E. J.

AU - Springer, R. W.

AU - Sproston, M.

AU - Stephens, K.

AU - Stier, H. E.

AU - Ströhmer, R.

AU - Strom, D.

AU - Takeda, H.

AU - Takeshita, T.

AU - Tsukomoto, T.

AU - Turner, M. F.

AU - Tysarczyk-Niemeyer, G.

AU - Van Den Plas, D.

AU - Vandalen, G. J.

AU - Virtue, C. J.

AU - Von Der Schmitt, H.

AU - Von Krogh, J.

AU - Wagner, A.

AU - Wahl, C.

AU - Ward, C. P.

AU - Ward, D. R.

AU - Waterhouse, J.

AU - Watkins, P. M.

AU - Watson, A. T.

AU - Watson, N. K.

AU - Weber, M.

AU - Weisz, S.

AU - Wermes, N.

AU - Weymann, M.

AU - Wilson, G. W.

AU - Wilson, J. A.

AU - Wingerter, I.

AU - Winterer, V. H.

AU - Wood, N. C.

AU - Wotton, S.

AU - Wuensch, B.

AU - Wyatt, T. R.

AU - Yaari, R.

AU - Yang, Y.

AU - Yekutieli, G.

AU - Yoshida, T.

AU - Zeuner, W.

AU - Zorn, G. T.

AU - Zylberajch, S.

PY - 1990/5/3

Y1 - 1990/5/3

N2 - The pure QED reaction e+e-→γγ has been studied at centre of mass energies around the mass of the Z0 boson using data recorded by the OPAL detector at LEP. The results are in good agreement with the QED prediction. Lower limits on the cutoff parameters of the modified electron propagator are found to be Λ+>89 GeV and Λ. The lower limit on the mass of an excited electron is 82 GeV assuming the coupling constant λ=1. Upper limits on the branching ratios of Z0→γγ, Z0→π0γ and Z0→ηγ are set at 3.7×10-4, 3.9×10-4 and 5.8×10-4 respectively. Two events from the reaction e+e-→γγγ have been observed, consistent with the QED prediction. An upper limit on the branching ratio of Z0→γγγ is set at 2.8×10-4. All the limits are given at 95% confidence level.

AB - The pure QED reaction e+e-→γγ has been studied at centre of mass energies around the mass of the Z0 boson using data recorded by the OPAL detector at LEP. The results are in good agreement with the QED prediction. Lower limits on the cutoff parameters of the modified electron propagator are found to be Λ+>89 GeV and Λ. The lower limit on the mass of an excited electron is 82 GeV assuming the coupling constant λ=1. Upper limits on the branching ratios of Z0→γγ, Z0→π0γ and Z0→ηγ are set at 3.7×10-4, 3.9×10-4 and 5.8×10-4 respectively. Two events from the reaction e+e-→γγγ have been observed, consistent with the QED prediction. An upper limit on the branching ratio of Z0→γγγ is set at 2.8×10-4. All the limits are given at 95% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=0041587556&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0041587556&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(90)91500-B

DO - 10.1016/0370-2693(90)91500-B

M3 - Article

VL - 241

SP - 133

EP - 140

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

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

SN - 0370-2693

IS - 1

ER -