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SEARCH FOR ANOMALOUS Z-]GAMMA-GAMMA-GAMMA EVENTS AT LEP
Authors :
Acciarri, M Adam, A Adriani, O Aguilarbenitez, M Ahlen, S Alcaraz, J Aloisio, A Alverson, G Alviggi, Mg Ambrosi, G An, Q Anderhub, H Anderson, Al Andreev, Vp Angelescu, T Antonov, L Antreasyan, D Alkhazov, G Arce, P Arefiev, A Azemoon, T Aziz, T Baba, Pvks Bagnaia, Paolo Bakken, Ja Baksay, L Ball, Rc Banerjee, S Banicz, K Barillere, R Barone, Luciano Maria Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, Gl Berdugo, J Berges, P Bertucci, B Betev, Bl Biasini, M Biland, A Bilei, Gm Bizzarri, R Blaising, Jj Bobbink, Gl Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Bouwens, B Brambilla, E Branson, Jg Brigljevic, V Brock, Ic Brooks, M Bujak, A Burger, Jd Burger, Wj Burgos, C Busenitz, J Buytenhuijs, A Bykov, A Cai, Xd Capell, M Romeo, Gc Caria, M Carlino, G Cartacci, Am Casaus, J Castello, R Cavallo, N Cerrada, M Cesaroni, F Chamizo, M Chang, Yh Chaturvedi, Uk Chemarin, M Chen, A Chen, C Chen, G Chen, Gm Chen, Hf Chen, Hs Chen, M Chiefari, G Chien, Cy Choi, Mt Chung, S Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Coan, Te Cohn, Ho Coignet, G Colino, N Commichau, V Costantini, S Cotorobai, F Delacruz, B Cui, Xt Cui, Xy Dai, Ts Dalessandro, R Deasmundis, R Degre, A Deiters, K Denes, E Denes, P Denotaristefani, F Dibitonto, D Diemoz, M Dimitrov, Hr Dionisi, C Dittmar, M Dorne, I Dova, Mt Drago, E Duchesneau, D Duhem, F Duinker, P Duran, I Dutta, S Easo, S Elmamouni, H Engler, A Eppling, Fj Erne, Fc Extermann, P Fabbretti, R Fabre, M Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, Fernando Fesefeldt, H Fiandrini, E Field, Jh Filthaut, F Fisher, Ph Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Gallo, E Ganguli, Sn Garciaabia, P Gau, Ss Gentile, Simonetta Gerald, J Gheordanescu, N Giagu, Stefano Goldfarb, S Goldstein, J Gong, Zf Gonzalez, E Gougas, A Goujon, D Gratta, G Gruenewald, Mw Gu, C Guanziroli, M Gupta, Vk Gurtu, A Gustafson, Hr Gutay, Lj Hartmann, B Hasan, A Hauschildt, D He, Jt Hebbeker, T Herbert, M Herve, A Hilgers, K Hofer, H Hoorani, H Hou, Sr Hu, G Ille, B Ilyas, Mm Innocente, V Janssen, H Jin, Bn Jones, Lw Dejong, P Josamutuberria, I Kasser, A Khan, Ra Kamyshkov, Y Kapinos, P Kapustinsky, Js Karyotakis, Y Kaur, M Khokhar, S Kienzlefocacci, Mn Kim, D Kim, Jk Kim, Sc Kim, Yg Kinnison, Ww Kirkby, A Kirkby, D Kirkby, J Kirsch, S Kittel, W Klimentov, A Konig, Ac Koffeman, E Kornadt, O Koutsenko, V Koulbardis, A Kraemer, Rw Kramer, T Krastev, Vr Krenz, W Kuijten, H Kunin, A Deguevara, Pl Landi, G Lanzano, S Laurikainen, P Lebedev, A Lebrun, P Lecomte, P Lecoq, P Lecoultre, P Lee, Dm Lee, Js Lee, Ky Leedom, I Leggett, C Legoff, Jm Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, Wt Linde, Fl Lindemann, B Lista, L Liu, Y Lohmann, W Longo, E Lu, W Lu, Ys Lubbers, Jm Lubelsmeyer, K Luci, Claudio Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, Wg Macdermott, M Maity, M Malgeri, L Malik, R Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, Jp Marzano, F Massaro, Ggg Mazumdar, K Mcmahon, T Mcnally, D Mele, S Merk, M Merola, L Meschini, M Metzger, Wj Mi, Y Mihul, A Mills, Gb Mir, Y Mirabelli, G Mnich, J Moller, M Monaco, V Monteleoni, B Morand, R Morganti, S Moulai, Ne Mount, R Muller, S Nagy, E Napolitano, M Nessitedaldi, F Newman, H Niaz, Ma Nippe, A Nowak, H Organtini, Giovanni Ostonen, R Pandoulas, D Paoletti, S Paolucci, P Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Pei, Yj Pensotti, S Perretgallix, D Pevsner, A Piccolo, D Pieri, M Pinto, Jc Piroue, Pa Pistolesi, E Plasil, F Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Qian, Jm Qureshi, Kn Raghavan, R Rahalcallot, G Rancoita, Pg Rattaggi, M Raven, G Razis, P Read, K Redaelli, M Ren, D Ren, Z Rescigno, M Reucroft, S Ricker, A Riemann, S Riemers, Bc Riles, K Rind, O Rizvi, Ha Ro, S Robohm, A Rodriguez, Fj Roe, Bp Rohner, M Rohner, S Romero, L Rosierlees, S Rosmalen, R Rosselet, P Vanrossum, W Roth, S Rubbia, A Rubio, Ja Rykaczewski, H Salicio, J Salicio, Jm Sanchez, E Sanders, Gs Santocchia, A Sarakinos, Me Sarkar, S Sartorelli, G Sassowsky, M Sauvage, G Schafer, C Schegelsky, V Schmitz, D Schmitz, P Schneegans, M Scholz, N Schopper, H Schotanus, Dj Shotkin, S Schreiber, Hj Shukla, J Schulte, R Schultze, K Schwenke, J Schwering, G Sciacca, C Sehgal, R Seiler, Pg Sens, Jc Servoli, L Sheer, I Shevchenko, S Shi, Xr Shumilov, E Shoutko, V Son, D Sopczak, A Soulimov, V Spartiotis, C Spickermann, T Spillantini, P Steuer, M Stickland, Dp Sticozzi, F Stone, H Strauch, K Sudhakar, K Sultanov, G Sun, Lz Susinno, Gf Suter, H Swain, Jd Syed, Aa Tang, Xw Taylor, L Timellini, R Ting, Scc Ting, Sm Toker, O Tonutti, M Tonwar, Sc Toth, J Trowitzsch, G Tsaregorodtsev, A Tsipolitis, G Tully, C Ulbricht, J Urban, L Uwer, U Valente, E Vandewalle, Rt Vetlitsky, I Viertel, G Vikas, P Vikas, U Vivargent, M Vogel, H Vogt, H Vorobiev, I Vorobyov, Aa Vuilleumier, L Wadhwa, M Wallraff, W Wang, Jc Wang, Xl Wang, Yf Wang, Zm Weber, A Weill, R Willmott, C Wittgenstein, F Wright, D Wu, Sx Wynhoff, S Zu, Zz Yang, Bz Yang, Cg Yang, G Yao, Xy Ye, Ch Ye, Jb Ye, Q Yeh, Sc You, Jm Yanus, N Yzerman, M Zaccardelli, C Zemp, P Zeng, M Zeng, Y Zhang, Dh Zhang, Zp Zhou, B Zhou, Gj Zhou, Jf Zhu, Ry Zichichi, A Vanderzwaan, Bcc Acciarri, M. Adam, A. Adriani, O. Aguilarbenitez, M. Ahlen, S. Alcaraz, J. Aloisio, Alberto Alverson, G. Alviggi, Mariagrazia Ambrosi, G. An, Q. Anderhub, H. Anderson, A. L. Andreev, V. P. Angelescu, T. Antonov, L. Antreasyan, D. Alkhazov, G. Arce, P. Arefiev, A. Azemoon, T. Aziz, T. P. V. K. Bagnaia, P. Bakken, J. A. Baksay, L. Ball, R. C. Banerjee, S. Banicz, K. Barillere, R. Barone, L. Baschirotto, A. Basile, M. Battiston, R. Bay, A. Becattini, F. Becker, U. Behner, F. Bencze, G. L. Berdugo, J. Berges, P. Bertucci, B. Betev, B. L. Biasini, M. Biland, A. Bilei, G. M. Bizzarri, R. Blaising, J. J. Bobbink, G. L. Bock, R. Bohm, A. Borgia, B. Boucham, A. Bourilkov, D. Bourquin, M. Boutigny, D. Bouwens, B. Brambilla, E. Branson, J. G. Brigljevic, V. Brock, I. C. Brooks, M. Bujak, A. Burger, J. D. Burger, W. J. Burgos, C. Busenitz, J. Buytenhuijs, A. Bykov, A. Cai, X. D. Capell, M. Romeo, G. C. Caria, M. Carlino, G. Cartacci, A. M. Casaus, J. Castello, R. Cavallo, N. Cerrada, M. Cesaroni, F. Chamizo, M. Chang, Y. H. Chaturvedi, U. K. Chemarin, M. Chen, A. Chen, C. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, M. Chiefari, Giovanni Chien, C. Y. Choi, M. T. Chung, S. Cifarelli, L. Cindolo, F. Civinini, C. Clare, I. Clare, R. Coan, T. E. Cohn, H. O. Coignet, G. Colino, N. Commichau, V. Costantini, S. Cotorobai, F. Delacruz, B. Cui, X. T. Cui, X. Y. Dai, T. S. Dalessandro, R. Deasmundis, R. Degre, A. Deiters, K. Denes, E. Denes, P. Denotaristefani, F. Dibitonto, D. Diemoz, M. Dimitrov, H. R. Dionisi, C. Dittmar, M. Dorne, I. Dova, M. T. Drago, E. Duchesneau, D. Duhem, F. Duinker, P. Duran, I. Dutta, S. Easo, S. Elmamouni, H. Engler, A. Eppling, F. J. Erne, F. C. Extermann, P. Fabbretti, R. Fabre, M. Falciano, S. Favara, A. Fay, J. Felcini, M. Ferguson, T. Fernandez, D. Fernandez, G. Ferroni, F. Fesefeldt, H. Fiandrini, E. Field, J. H. Filthaut, F. Fisher, P. H. Forconi, G. Fredj, L. Freudenreich, K. Gailloud, M. Galaktionov, Y. Gallo, E. Ganguli, S. N. Garciaabia, P. Gau, S. S. Gentile, S. Gerald, J. Gheordanescu, N. Giagu, S. Goldfarb, S. Goldstein, J. Gong, Z. F. Gonzalez, E. Gougas, A. Goujon, D. Gratta, G. Gruenewald, M. W. Gu, C. Guanziroli, M. Gupta, V. K. Gurtu, A. Gustafson, H. R. Gutay, L. J. Hartmann, B. Hasan, A. Hauschildt, D. J. T., He Hebbeker, T. Herbert, M. Herve, A. Hilgers, K. Hofer, H. Hoorani, H. Hou, S. R. Hu, G. Ille, B. Ilyas, M. M. Innocente, V. Janssen, H. Jin, B. N. Jones, L. W. Dejong, P. Josamutuberria, I. Kasser, A. Khan, R. A. Kamyshkov, Y. Kapinos, P. Kapustinsky, J. S. Karyotakis, Y. Kaur, M. Khokhar, S. Kienzlefocacci, M. N. Kim, D. Kim, J. K. Kim, S. C. Kim, Y. G. Kinnison, W. W. Kirkby, A. Kirkby, D. Kirkby, J. Kirsch, S. Kittel, W. Klimentov, A. Konig, A. C. Koffeman, E. Kornadt, O. Koutsenko, V. Koulbardis, A. Kraemer, R. W. Kramer, T. Krastev, V. R. Krenz, W. Kuijten, H. Kunin, A. Deguevara, P. L. Landi, G. Lanzano, S. Laurikainen, P. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Lecoultre, P. Lee, D. M. Lee, J. S. Lee, K. Y. Leedom, I. Leggett, C. Legoff, J. M. Leiste, R. Lenti, M. Leonardi, E. Levtchenko, P. Li, C. Lieb, E. Lin, W. T. Linde, F. L. Lindemann, B. Lista, L. Liu, Y. Lohmann, W. Longo, E. Lu, W. Y. S., Lu Lubbers, J. M. Lubelsmeyer, K. Luci, C. Luckey, D. Ludovici, L. Luminari, L. Lustermann, W. W. G., Ma Macdermott, M. Maity, M. Malgeri, L. Malik, R. Malinin, A. Mana, C. Mangla, S. Maolinbay, M. Marchesini, P. Marin, A. Martin, J. P. Marzano, F. G. G. G. Mazumdar, K. Mcmahon, T. Mcnally, D. Mele, S. Merk, M. Merola, Leonardo Meschini, M. Metzger, W. J. Mi, Y. Mihul, A. Mills, G. B. Mir, Y. Mirabelli, G. Mnich, J. Moller, M. Monaco, V. Monteleoni, B. Morand, R. Morganti, S. Moulai, N. E. Mount, R. Muller, S. Nagy, E. Napolitano, Marco Nessitedaldi, F. Newman, H. Niaz, M. A. Nippe, A. Nowak, H. Organtini, G. Ostonen, R. Pandoulas, D. Paoletti, S. Paolucci, P. Pascale, G. Passaleva, G. Patricelli, Sergio Paul, T. Pauluzzi, M. Paus, C. Pauss, F. Pei, Y. J. Pensotti, S. Perretgallix, D. Pevsner, A. Piccolo, D. Pieri, M. Pinto, J. C. Piroue, P. A. Pistolesi, E. Plasil, F. Plyaskin, V. Pohl, M. Pojidaev, V. Postema, H. Produit, N. Qian, J. M. Qureshi, K. N. Raghavan, R. Rahalcallot, G. Rancoita, P. G. Rattaggi, M. Raven, G. Razis, P. Read, K. Redaelli, M. Ren, D. Ren, Z. Rescigno, M. Reucroft, S. Ricker, A. Riemann, S. Riemers, B. C. Riles, K. Rind, O. Rizvi, H. A. Ro, S. Robohm, A. Rodriguez, F. J. Roe, B. P. Rohner, M. Rohner, S. Romero, L. Rosierlees, S. Rosmalen, R. Rosselet, P. Vanrossum, W. Roth, S. Rubbia, A. Rubio, J. A. Rykaczewski, H. Salicio, J. Salicio, J. M. Sanchez, E. Sanders, G. S. Santocchia, A. Sarakinos, M. E. Sarkar, S. Sartorelli, G. Sassowsky, M. Sauvage, G. Schafer, C. Schegelsky, V. Schmitz, D. Schmitz, P. Schneegans, M. Scholz, N. Schopper, H. Schotanus, D. J. Shotkin, S. Schreiber, H. J. Shukla, J. Schulte, R. Schultze, K. Schwenke, J. Schwering, G. Sciacca, Crisostomo Sehgal, R. Seiler, P. G. Sens, J. C. Servoli, L. Sheer, I. Shevchenko, S. Shi, X. R. Shumilov, E. Shoutko, V. Son, D. Sopczak, A. Soulimov, V. Spartiotis, C. Spickermann, T. Spillantini, P. Steuer, M. Stickland, D. P. Sticozzi, F. Stone, H. Strauch, K. Sudhakar, K. Sultanov, G. Sun, L. Z. Susinno, G. F. Suter, H. Swain, J. D. Syed, A. A. Tang, X. W. Taylor, L. Timellini, R. S. C. C. Ting, S. M. Toker, O. Tonutti, M. Tonwar, S. C. Toth, J. Trowitzsch, G. Tsaregorodtsev, A. Tsipolitis, G. Tully, C. Ulbricht, J. Urban, L. Uwer, U. Valente, E. Vandewalle, R. T. Vetlitsky, I. Viertel, G. Vikas, P. Vikas, U. Vivargent, M. Vogel, H. Vogt, H. Vorobiev, I. Vorobyov, A. A. Vuilleumier, L. Wadhwa, M. Wallraff, W. Wang, J. C. Wang, X. L. Wang, Y. F. Wang, Z. M. Weber, A. Weill, R. Willmott, C. Wittgenstein, F. Wright, D. S. X., Wu Wynhoff, S. Z. Z., Zu Yang, B. Z. Yang, C. G. Yang, G. Yao, X. Y. C. H., Ye J. B., Ye Ye, Q. Yeh, S. C. You, J. M. Yanus, N. Yzerman, M. Zaccardelli, C. Zemp, P. Zeng, M. Zeng, Y. Zhang, D. H. Zhang, Z. P. Zhou, B. Zhou, G. J. Zhou, J. F. Zhu, R. Y. Zichichi, A. B. C. C.
Source :
Physics Letters B, 345, 4, pp. 609-616, Physics Letters B, 345, 609-616. Elsevier science bv
Publication Year :
1995
Abstract
We have searched for anomalous Z --> gamma gamma gamma events with the L3 detector at LEP. No significant deviations from the expected QED e(+)e(-)-->gamma gamma gamma events are observed. The branching ratio upper limit for a composite Z decaying directly into three photons is found to be 1.0 x 10(-1) at 95% C.L. The branching ratio upper limits for the process Z-->gamma X,X-->gamma gamma are in the range of 0.4 to 1.3 x 10(-5), depending on the mass and width of the scalar particle X. In the context of a model with magnetic monopoles coupling to the Z, we find BR(Z-->gamma gamma gamma) < 0.8 x 10(-5) at 95% C.L; this results in a lower mass limit of 510 GeV for a magnetic monopole.
Details
ISSN :
03702693
Volume :
345
Issue :
4
Database :
OpenAIRE
Journal :
PHYSICS LETTERS B
Accession number :
edsair.dedup.wf.001..1b3a11b6bf1d9cef03178980fb5dbcbd