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A direct measurement of the invisible width of the Z from single photon counting
Authors :
Buskulic, D. de Bonis, I. Decamp, D. Ghez, P. Goy, C. Lees, J. P. Minard, M. N. Pietrzyk, B. Ariztizabal, F. Comas, P. Crespo, J. M. Delfino, M. Efthymiopoulos, I. Fernandez, E. Fernandez Bosman, M. Gaitan, V. Garrido, L. l. Mattison, T. Pacheco, A. Padilla, C. Pasual, A. Creanza, D. de Palma, M. Farilla, A. Iaselli, G. Maggi, G. Natali, S. Nuzzo, S. Quattromini, M. Ranieri, A. Raso, G. Romano, F. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Zito, G. Chai, Y. Hu, H. Huang, D. Huang, X. Lin, J. Wang, T. Xie, Y. Xu, D. Xu, R. Zhang, J. Zhang, L. Zhao, W. Blucher, E. Bonvicini, G. Boudreau, J. Casper, D. Drevermann, H. Forty, R. W. Ganis, G. Gay, C. Hagelberg, R. Harvey, J. Hilgart, J. Jacobsen, R. Jost, B. Knobloch, J. Lehraus, I. Lohse, T. Maggi, M. Markou, C. Martinez, M. Mato, P. Meinhard, H. Minten, A. Miotto, A. Miquel, R. Moser, H. G. Palazzi, P. Pater, J. R. Perlas, J. A. Pusztaszeri, J. F. Ranjard, F. Redlinger, G. Rolandi, L. Rothberg, J. Ruan, T. Saich, M. Schlatter, D. Schmelling, M. Sefkow, F. Tejessy, W. Tomalin, I. R. Veenhof, R. Wachsmuth, H. Wasserbaech, S. Wiedenmann, W. Wildish, T. Witzeling, W. Wotschack, J. Atjaltouni, Z. Badaud, F. Bardadin Otwinowska, M. El Fellous, R. Falvard, A. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Montret, J. C. Pallin, D. Perret, P. Podlyski, F. Proriol, J. Prulhière, F. Saadi, F. Fearnley, T. Hansen, J. B. Hansen, J. D. Hansen, J. R. Hansen, P. H. Møllerud, R. Nilsson, B. S. Kyriakis, A. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Badier, J. Blondel, A. Bonneaud, G. Brient, J. C. Fouque, G. Orteu, S. Rougé, A. Rumpf, M. Tanaka, R. Verderi, M. Videau, H. Candlin, D. J. Parsons, M. I. Veitch, E. Focardi, E. Moneta, L. Parrini, G. Corden, M. Georgiopoulos, C. Ikeda, M. Levinthal, D. Antonelli, A. Baldini, R. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Cerutti, F. Chiarella, V. D'Ettorre Piazzoli, B. Felici, G. Laurelli, P. Mannocchi, G. Murtas, F. Murtas, G. P. Passalacqua, L. Pepe Altarelli, M. Picchi, P. Colrain, P. Ten Have, I. Lynch, J. G. Maitland, W. Morton, W. T. Raine, C. Reeves, P. Scarr, J. M. Smith, K. Smith, M. G. Thompson, A. S. Turnbull, R. M. Brandl, B. Braun, O. Geweniger, C. Hanke, P. Hepp, V. Kluge, E. E. Maumary, Y. Putzer, A. Rensch, B. Stahl, A. Tittel, K. Wunsch, M. Beuselinck, R. Binnie, D. M. Cameron, W. Cattaneo, M. Colling, D. J. Dornan, P. J. Greene, A. M. Hassard, J. F. Lieske, N. M. Moutoussi, A. Nash, J. Patton, S. Payne, D. G. Phillips, M. J. San Martin, G. Sedgbeer, J. K. Wright, A. G. Girtler, P. Kuhn, D. Rudolph, G. Vogl, R. Bowdery, C. K. Brodbeck, T. J. Finch, A. J. Foster, F. Hughes, G. Jackson, D. Keemer, N. R. Nuttall, M. Petl, A. Sloan, T. Snow, S. W. Whelan, E. P. Kleinknecht, K. Raab, J. Renk, B. Sander, H. G. Schmidt, H. Steeg, F. Walther, S. M. Wanke, R. Wolf, B. Bencheikh, A. M. Benchouk, C. Bonissent, A. Carr, J. Coyle, P. Drinkard, J. Etienne, F. Nicod, D. Papalexiou, S. Payre, P. Roos, L. Rousseau, D. Schwemling, P. Talby, M. Adlung, S. Assmann, R. Bauer, C. Blum, W. Brown, D. Cattaneo, P. Dehning, B. Dietl, H. Dydak, F. Frank, M. Halley, A. W. Jakobs, K. Lauber, J. Lütjens, G. Lutz, G. Männer, W. Richter, R. Schröder, J. Schwarz, A. S. Settles, R. Seywerd, H. Stielin, U. Stiegler, U. S. t. Denis, R. Wolf, G. Alemany, R. Boucrot, J. Callot, O. Cordier, A. Davier, M. Duflot, L. Grivaz, J. F. Heusse, P. h. Jaffe, D. E. Janot, P. Kim, D. W. Le Diberder, F. Lefrançois, J. Lutz, A. M. Schune, M. H. Veillet, J. J. Videau, I. Zhang, Z. Abbaneo, D. Bagliesi, G. Batignani, G. Bottigli, U. Bozzi, C. Calderini, G. Carpinelli, M. Ciocci, M. A. Ciulli, V. Dell'Orso, R. Ferrante, I. Fidecaro, F. Foà, L. Forti, F. Giassi, A. Giorgi, M. A. Gregorio, Anna Ligabue, F. Lusiani, A. Mannelli, E. B. Marrocchesi, P. S. Messineo, A. Palla, F. Sanguinetti, G. Spagnolo, P. Steinberger, J. Tenchini, R. Tonelli, G. Triggiani, G. Valassi, A. Vannini, C. Venturi, A. Verdini, P. G. Walsh, J. Betteridge, A. P. Gao, Y. Green, M. G. March, P. V. Mir, L. l. M. Medcalf, T. Quazi, I. S. Strong, J. A. West, L. R. Botteril, D. R. Clifft, R. W. Edgecock, T. R. Haywood, S. Norton, P. R. Thompson, J. C. Bloch Devaux, B. Colas, P. Duarte, H. Emery, S. Kozanecki, W. Lançon, E. Lemaire, M. C. Locci, E. Marx, B. Perez, P. Rander, J. Renardy, J. F. Rosowsky, A. Roussarie, A. Schuller, J. P. Schwindling, J. Si Mohand, D. Vallage, B. Johnson, R. P. Litke, A. M. Taylor, G. Wear, J. Ashman, J. G. Babbage, W. Booth, C. N. Buttar, C. Cartwright, S. Combley, F. Dawson, I. Thompson, L. F. Barberio, E. Böhrer, A. Brandt, S. Cowan, G. Grupen, C. Lutters, G. Rivera, F. Schäfer, U. Smolik, L. Bosisio, Luciano della Marina, R. Giannini, Gianrossano Gobbo, B. Ragusa, F. Bellatoni, L. Chen, W. Conway, J. S. Feng, Z. Ferguson, D. P. S. Gao, Y. S. Grahl, J. Harton, J. L. Hayes, O. J. Nachtman, J. M. Pan, Y. B. Saadi, Y. Schmitt, M. Scott, I. Sharma, V. Shi, Z. H. Turk, J. D. Walsh, A. M. Weber, F. V. Sau, Lan Wu, X. Zheng, M. Zobernig, G. Laboratoire d'Annecy de Physique des Particules (LAPP) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Leprince-Ringuet (LLR) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS) Centre de Physique des Particules de Marseille (CPPM) Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de l'Accélérateur Linéaire (LAL) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) ALEPH Buskulic, D Debonis, I Decamp, D Ghez, P Goy, C Lees, Jp Minard, Mn Pietrzyk, B Ariztizabal, F Comas, P Crespo, Jm Delfino, M Efthymiopoulos, I Fernandez, E Fernandezbosman, M Gaitan, V Garrido, L Mattison, T Pacheco, A Padilla, C Pascual, A Creanza, D Depalma, M Farilla, A Iaselli, G Maggi, G Natali, S Nuzzo, S Quattromini, M Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Chai, Y Hu, H Huang, D Huang, X Lin, J Wang, T Xie, Y Xu, D Xu, R Zhang, J Zhang, L Zhao, W Blucher, E Bonvicini, G Boudreau, J Casper, D Drevermann, H Forty, Rw Ganis, G Gay, C Hagelberg, R Harvey, J Hilgart, J Jacobsen, R Jost, B Knobloch, J Lehraus, I Lohse, T Maggi, M Markou, C Martinez, M Mato, P Meinhard, H Minten, A Miotto, A Miquel, R Moser, Hg Palazzi, P Pater, Jr Perlas, Ja Pusztaszeri, Jf Ranjard, F Redlinger, G Rolandi, Luigi Rothberg, J Ruan, T Saich, M Schlatter, D Schmelling, M Sefkow, F Tejessy, W Tomalin, Ir Veenhof, R Wachsmuth, H Wasserbaech, S Wiedenmann, W Wildish, T Witzeling, W Wotschack, J Ajaltouni, Z Badaud, F Bardadinotwinowska, M Elfellous, R Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Montret, Jc Pallin, D Perret, P Podlyski, F Proriol, J Prulhiere, F Saadi, F Fearnley, T Hansen, Jb Hansen, Jd Hansen, Jr Hansen, Ph Mollerud, R Nilsson, B Kyriakis, A Simopoulou, E Siotis, I Vayaki, A Zachariadou, K Badier, J Blondel, A Bonneaud, G Brient, Jc Fouque, G Orteu, S Rouge, A Rumpf, M Tanaka, R Verderi, M Videau, H Candlin, Dj Parsons, Mi Veitch, E Focardi, E Moneta, L Parrini, G Corden, M Georgiopoulos, C Ikeda, M Levinthal, D Antonelli, A Baldini, R Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Dettorrepiazzoli, B Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, Gp Passalacqua, L Pepealtarelli, M Picchi, P Colrain, P Tenhave, I Lynch, Jg Maitland, W Morton, Wt Raine, C Reeves, P Scarr, Jm Smith, K Smith, Mg Thompson, A Turnbull, Rm Brandl, B Braun, O Geweniger, C Hanke, P Hepp, V Kluge, Ee Maumary, Y Putzer, A Rensch, B Stahl, A Tittel, K Wunsch, M Beuselinck, R Binnie, Dm Cameron, W Cattaneo, M Colling, Dj Dornan, Pj Greene, Am Hassard, Jf Lieske, Nm Moutoussi, A Nash, J Patton, S Payne, Dg Phillips, Mj Sanmartin, G Sedgbeer, Jk Wright, Ag Girtler, P Kuhn, D Rudolph, G Vogl, R Bowdery, Ck Brodbeck, Tj Finch, Aj Foster, F Hughes, G Jackson, D Keemer, Nr Nuttall, M Patel, A Sloan, T Snow, Sw Whelan, Ep Kleinknecht, K Raab, J Renk, B Sander, Hg Schmidt, H Steeg, F Walther, Sm Wanke, R Wolf, B Bencheikh, Am Benchouk, C Bonissent, A Carr, J Coyle, P Drinkard, J Etienne, F Nicod, D Papalexiou, S Payre, P Roos, L Rousseau, D Schwemling, P Talby, M Adlung, S Assmann, R Bauer, C Blum, W Brown, D Cattaneo, P Dehning, B Dietl, H Dydak, F Frank, M Halley, Aw Jakobs, K Lauber, J Lutjens, G Lutz, G Manner, W Richter, R Schroder, J Schwarz, A Settles, R Seywerd, H Stierlin, U Stiegler, U Stdenis, R Wolf, G Alemany, R Boucrot, J Callot, O Cordier, A Davier, M Duflot, L Grivaz, Jf Heusse, P Jaffe, De Janot, P Kim, Dw Lediberder, F Lefrancois, J Lutz, Am Schune, Mh Veillet, Jj Videau, I Zhang, Z Abbaneo, D Bagliesi, G Batignani, G Bottigli, U Bozzi, C Calderini, G Carpinelli, M Ciocci, Ma Ciulli, V Dellorso, R Ferrante, I Fidecaro, F Foa, L Forti, F Giassi, A Giorgi, Ma Gregorio, A Ligabue, Franco Lusiani, Alberto Mannelli, Eb Marrocchesi, P Messineo, A Palla, F Rizzo, G Sanguinetti, G Spagnolo, P Steinberger, J Tenchini, R Tonelli, G Triggiani, G Valassi, A Vannini, C Venturi, A Verdini, Pg Walsh, J Betteridge, Ap Gao, Y Green, Mg March, Pv Mir, Lm Medcalf, T Quazi, I Strong, Ja West, Lr Botterill, Dr Clifft, Rw Edgecock, Tr Haywood, S Norton, Pr Thompson, Jc Blochdevaux, B Colas, P Duarte, H Emery, S Kozanecki, W Lancon, E Lemaire, Mc Locci, E Marx, B Perez, P Rander, J Renardy, Jf Rosowsky, A Roussarie, A Schuller, Jp Schwindling, J Mohand, D Vallage, B Johnson, Rp Litke, Am Taylor, G Wear, J Ashman, Jg Babbage, W Booth, Cn Buttar, C Cartwright, S Combley, F Dawson, I Thompson, Lf Barberio, E Bohrer, A Brandt, S Cowan, G Grupen, C Lutters, G Rivera, F Schafer, U Smolik, L Bosisio, L Dellamarina, R Giannini, G Gobbo, B Ragusa, F Bellantoni, L Chen, W Conway, J Feng, Z Ferguson, Dp Grahl, J Harton, Jl Hayes, Oj Nachtman, Jm Pan, Yb Saadi, Y Schmitt, M Scott, I Sharma, V Shi, Zh Turk, Jd Walsh, Am Weber, Fv Wu, Sl Wu, X Zheng, M Zobernig, G. Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11) Chadelas, Michèle Lees, J Minard, M Crespo, J Forty, R Moser, H Pater, J Perlas, J Pusztaszeri, J Rolandi, L Tomalin, I Montret, J Hansen, J Hansen, P Brient, J Candlin, D Parsons, M Murtas, G Lynch, J Morton, W Scarr, J Smith, M Turnbull, R Kluge, E Binnie, D Colling, D Dornan, P Greene, A Hassard, J Lieske, N Payne, D Phillips, M Sedgbeer, J Wright, A Bowdery, C Brodbeck, T Finch, A Keemer, N Snow, S Whelan, E Sander, H Walther, S Bencheikh, A Halley, A Grivaz, J Jaffe, D Kim, D Lutz, A Schune, M Veillet, J Ciocci, M Giorgi, M Ligabue, F Lusiani, A Mannelli, E Verdini, P Betteridge, A Green, M March, P Mir, L Strong, J West, L Botterill, D Clifft, R Edgecock, T Norton, P Thompson, J Lemaire, M Renardy, J Schuller, J Johnson, R Litke, A Ashman, J Booth, C Thompson, L Ferguson, D Harton, J Hayes, O Nachtman, J Pan, Y Shi, Z Turk, J Walsh, A Weber, F Wu, S Zobernig, G Aleph, Collaboration D'ETTORRE PIAZZOLI, Benedetto D., Buskulic I., De Boni D., Decamp P., Ghez C., Goy J. P., Lee M. N., Minard B., Pietrzyk F., Ariztizabal Buskulic, D. de Bonis, I. Decamp, D. Ghez, P. Goy, C. Lees, J. P. Minard, M. N. Pietrzyk, B. Ariztizabal, F. Comas, P. Crespo, J. M. Delfino, M. Efthymiopoulos, I. Fernandez, E. Fernandez Bosman, M. Gaitan, V. Garrido, L. l. Mattison, T. Pacheco, A. Padilla, C. Pasual, A. Creanza, D. de Palma, M. Farilla, A. Iaselli, G. Maggi, G. Natali, S. Nuzzo, S. Quattromini, M. Ranieri, A. Raso, G. Romano, F. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Zito, G. Chai, Y. Hu, H. Huang, D. Huang, X. Lin, J. Wang, T. Xie, Y. Xu, D. Xu, R. Zhang, J. Zhang, L. Zhao, W. Blucher, E. Bonvicini, G. Boudreau, J. Casper, D. Drevermann, H. Forty, R. W. Ganis, G. Gay, C. Hagelberg, R. Harvey, J. Hilgart, J. Jacobsen, R. Jost, B. Knobloch, J. Lehraus, I. Lohse, T. Maggi, M. Markou, C. Martinez, M. Mato, P. Meinhard, H. Minten, A. Miotto, A. Miquel, R. Moser, H. G. Palazzi, P. Pater, J. R. Perlas, J. A. Pusztaszeri, J. F. Ranjard, F. Redlinger, G. Rolandi, L. Rothberg, J. Ruan, T. Saich, M. Schlatter, D. Schmelling, M. Sefkow, F. Tejessy, W. Tomalin, I. R. Veenhof, R. Wachsmuth, H. Wasserbaech, S. Wiedenmann, W. Wildish, T. Witzeling, W. Wotschack, J. Atjaltouni, Z. Badaud, F. Bardadin Otwinowska, M. El Fellous, R. Falvard, A. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Montret, J. C. Pallin, D. Perret, P. Podlyski, F. Proriol, J. Prulhière, F. Saadi, F. Fearnley, T. Hansen, J. B. Hansen, J. D. Hansen, J. R. Hansen, P. H. Møllerud, R. Nilsson, B. S. Kyriakis, A. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Badier, J. Blondel, A. Bonneaud, G. Brient, J. C. Fouque, G. Orteu, S. Rougé, A. Rumpf, M. Tanaka, R. Verderi, M. Videau, H. Candlin, D. J. Parsons, M. I. Veitch, E. Focardi, E. Moneta, L. Parrini, G. Corden, M. Georgiopoulos, C. Ikeda, M. Levinthal, D. Antonelli, A. Baldini, R. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Cerutti, F. Chiarella, V. D'Ettorre Piazzoli, B. Felici, G. Laurelli, P. Mannocchi, G. Murtas, F. Murtas, G. P. Passalacqua, L. Pepe Altarelli, M. Picchi, P. Colrain, P. Ten Have, I. Lynch, J. G. Maitland, W. Morton, W. T. Raine, C. Reeves, P. Scarr, J. M. Smith, K. Smith, M. G. Thompson, A. S. Turnbull, R. M. Brandl, B. Braun, O. Geweniger, C. Hanke, P. Hepp, V. Kluge, E. E. Maumary, Y. Putzer, A. Rensch, B. Stahl, A. Tittel, K. Wunsch, M. Beuselinck, R. Binnie, D. M. Cameron, W. Cattaneo, M. Colling, D. J. Dornan, P. J. Greene, A. M. Hassard, J. F. Lieske, N. M. Moutoussi, A. Nash, J. Patton, S. Payne, D. G. Phillips, M. J. San Martin, G. Sedgbeer, J. K. Wright, A. G. Girtler, P. Kuhn, D. Rudolph, G. Vogl, R. Bowdery, C. K. Brodbeck, T. J. Finch, A. J. Foster, F. Hughes, G. Jackson, D. Keemer, N. R. Nuttall, M. Petl, A. Sloan, T. Snow, S. W. Whelan, E. P. Kleinknecht, K. Raab, J. Renk, B. Sander, H. G. Schmidt, H. Steeg, F. Walther, S. M. Wanke, R. Wolf, B. Bencheikh, A. M. Benchouk, C. Bonissent, A. Carr, J. Coyle, P. Drinkard, J. Etienne, F. Nicod, D. Papalexiou, S. Payre, P. Roos, L. Rousseau, D. Schwemling, P. Talby, M. Adlung, S. Assmann, R. Bauer, C. Blum, W. Brown, D. Cattaneo, P. Dehning, B. Dietl, H. Dydak, F. Frank, M. Halley, A. W. Jakobs, K. Lauber, J. Lütjens, G. Lutz, G. Männer, W. Richter, R. Schröder, J. Schwarz, A. S. Settles, R. Seywerd, H. Stielin, U. Stiegler, U. S. t. Denis, R. Wolf, G. Alemany, R. Boucrot, J. Callot, O. Cordier, A. Davier, M. Duflot, L. Grivaz, J. F. Heusse, P. h. Jaffe, D. E. Janot, P. Kim, D. W. Le Diberder, F. Lefrançois, J. Lutz, A. M. Schune, M. H. Veillet, J. J. Videau, I. Zhang, Z. Abbaneo, D. Bagliesi, G. Batignani, G. Bottigli, U. Bozzi, C. Calderini, G. Carpinelli, M. Ciocci, M. A. Ciulli, V. Dell'Orso, R. Ferrante, I. Fidecaro, F. Foà, L. Forti, F. Giassi, A. Giorgi, M. A. Gregorio, Anna Ligabue, F. Lusiani, A. Mannelli, E. B. Marrocchesi, P. S. Messineo, A. Palla, F. Sanguinetti, G. Spagnolo, P. Steinberger, J. Tenchini, R. Tonelli, G. Triggiani, G. Valassi, A. Vannini, C. Venturi, A. Verdini, P. G. Walsh, J. Betteridge, A. P. Gao, Y. Green, M. G. March, P. V. Mir, L. l. M. Medcalf, T. Quazi, I. S. Strong, J. A. West, L. R. Botteril, D. R. Clifft, R. W. Edgecock, T. R. Haywood, S. Norton, P. R. Thompson, J. C. Bloch Devaux, B. Colas, P. Duarte, H. Emery, S. Kozanecki, W. Lançon, E. Lemaire, M. C. Locci, E. Marx, B. Perez, P. Rander, J. Renardy, J. F. Rosowsky, A. Roussarie, A. Schuller, J. P. Schwindling, J. Si Mohand, D. Vallage, B. Johnson, R. P. Litke, A. M. Taylor, G. Wear, J. Ashman, J. G. Babbage, W. Booth, C. N. Buttar, C. Cartwright, S. Combley, F. Dawson, I. Thompson, L. F. Barberio, E. Böhrer, A. Brandt, S. Cowan, G. Grupen, C. Lutters, G. Rivera, F. Schäfer, U. Smolik, L. Bosisio, Luciano della Marina, R. Giannini, Gianrossano Gobbo, B. Ragusa, F. Bellatoni, L. Chen, W. Conway, J. S. Feng, Z. Ferguson, D. P. S. Gao, Y. S. Grahl, J. Harton, J. L. Hayes, O. J. Nachtman, J. M. Pan, Y. B. Saadi, Y. Schmitt, M. Scott, I. Sharma, V. Shi, Z. H. Turk, J. D. Walsh, A. M. Weber, F. V. Sau, Lan Wu Wu, X. Zheng, M.
Source :
Physics Letters B, Physics Letters B, 1993, 313, pp.520-534, Physics Letters B, Elsevier, 1993, 313, pp.520-534
Publication Year :
1993
Abstract
The ALEPH detector at LEP is used to study single photon events in e+e- collisions at the Z resonance. In a total data sample of 15.7 pb-1 taken in 1990 and 1991 scanning the resonance, 400 events were recorded where each has a single deposition of more than 1.5 GeV measured in the polar angular region \costheta(gamma)\ < 0.74 of the electromagnetic calorimeter. It is shown that this number of events can be accounted for by known processes. After subtraction of background events, the invisible width of the Z is determined to be 450 +/- 34(stat.) +/- 34(syst.) MeV. Using Z resonance parameters derived by ALEPH, the corresponding number of light neutrino generations is found to be 2.68 +/- 0.20(stat.) +/- 0.20(syst.). RI ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012
Details
Language :
English
ISSN :
03702693
Database :
OpenAIRE
Journal :
Physics Letters B, Physics Letters B, 1993, 313, pp.520-534, Physics Letters B, Elsevier, 1993, 313, pp.520-534
Accession number :
edsair.doi.dedup.....197492994b3517d2a565c9cd661eb557