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A measurement of the QCD colour factors and a limit on the light gluino
Authors :
Armstrong S Schael G Lutjens M. Chmeissani G. R. Bonneaud M H. Lehto A Juste M Thulasidas H Dietl K Jakobs C Benchouk G Lutters J Sommer Am Litke X Wu L. Rolandi E. Lancon G Giannini Hansen Rw Clifft Ir Tomalin P Saraiva P Payre Giorgio Maggi Lucia Silvestris P. Bourdon S Haywood A. Blondel C Padilla O. Callot Jordan Nash P Henrard Tc Greening H Stenzel Pa Mcnamara A. Trabelsi D Zerwas As Thompson Ja Strong Arnaud Lucotte B Pietrzyk L Moneta G Gelao P Perrodo B Jost M Frank I. Siotis Ga Blair G. Capon O'Shea Jj Veillet Hg Sander E Simopoulou E Fernandez A Putzer F Ranjard L. F. Thompson Ao Bazarko L. Passalacqua R. Barate Giuseppe Iaselli A Moutoussi S Xue Dps Ferguson Claudine Boyer T Fearnley G Lutz Mi Williams C. Grupen W Tejessy R. Denis Dw Kim D Rousseau J. Grahl G Bujosa P. Tempesta A.E. Wright S Bettarini F. Sanchez P Coyle R Settles C. N. Booth Ck Bowdery P Heusse Pj Dornan G. Hansper Mg Green Kelly L Duflot S. Gonzalez A. Antonelli L Garrido M. Pepe-Altarelli K Tittel Jm Nachtman C Goy Ig Knowles Chiarella De Jaffe S Nuzzo D. Pallin Mi Parsons P Colas A. Tricomi A. Jacholkowska M. Verderi Oj Hayes Jm Rossignol Jm Yamartino A Kyriakis Mc Lemaire J.H. Dann Jp Schuller Eb Martin L Zhang A Roussarie A Messineo D. J. Candlin P. Comas G. Bencivenni M. Aleppo Q Ouyang S Monteil A Bonissent F. Ligabue C Georgiopoulos D. Casper R Boswell G Dissertori G. Zobernig P vanGemmeren R Alemany G. Mannocchi A Minten Sj Dorris Jf Renardy A Hocker Lorenzo Foà A Rouge A. Wäänänen Ic Park Z. Y. Feng S. L. Wu P. Bright-Thomas G Rizzo Ps Marrocchesi A Pascual Jh Vonwimmerspergtoeller Rw Forty Philippe Odier A Cordier Hepp G. Batignani D Schlatter T Sloan J.Y. Nief G Bagliesi M. N. Minard Ma Giorgi P. Laurelli P Ghez M Corden A. Böhrer F Palla X Huang M Talby F Podlyski Giovanna Selvaggi L Bosisio Hg Moser R Beuselinck M. Carpinelli M Girone I Lehraus H. Y. Kim Maria Agnese Ciocci A. Vayaki J. P. Lees S Brandt A Sadouki G Cowan Caj Brew Guido Tonelli W Zhao M Rumpf P Elmer Rm Turnbull W Blum Am Lutz C Raine G Ganis H Wachsmuth Si Chen Ja Perlas F Cerutti H Kroha G. Zito P Maley J Steinberger R Tenchini G Wolf G Hughes L Smolik W Orejudos P Rosnet A Gregorio C Zeitnitz I Ferrante S. L. Cartwright Gp Murtas Evelyn Thomson R Maggi W Wiedenmann D Abbaneo Donato Creanza A Falvard J Walsh I Nikolic J Boucrot C Diaconu Mp Casado A. Rosado-Schlosser Y Xie A Giassi Rp Johnson A Venturi P Azzurri Jm Crespo F. Ruggieri E Kneringer Jf Pusztaszeri R Fantechi Bs Nilsson T Medcalf Aw Halley Young-Il Choi P Colrain Buscher C Gotzhein S. Orteu W Cameron C Vannini P Perret R Xu Jk Sedgbeer M Cattaneo I.J. Scott J-C. Brient J Carr M Wunsch Ap Betteridge O Leroy J Lin Ziad Ajaltouni C. Hoffmann E Rohne Wm Newton J Jousset I Videau A. Wagner P Girtler Pg Verdini M Delfino B Gobbo B Renk A Sciaba G. Daskalakis J. J. Aubert M Depalma P. H. Hansen G Parrini G Calderini G. Rudolph M. Fernandez-Bosman J Reeve I Riu P Perez A Barres S.N. Black R Richter F. Murtas P. Rensing Y Saadi P. Campana B. Rensch F Ragusa M. H. Schune L. M. Mir Am Stacey G Quast A Colaleo D Kuhn M.G. Schmidt A. Valassi P Hanke J-C. Montret H Seywerd K. Trabelsi Am Greene G Musolino M Davier F Combley J. Schwindling Jg Lynch K Zachariadou B Michel M Schmitt F. Dydak A. J. Finch N Konstantinidis J Zhang Yang Gao P Mato F Teubert A Pacheco H Hu A Ranieri W. Kozanecki F. Forti M Martinez Y. S. Gao C. Guicheney C. Ferdi H Drevermann G. Raso Lm Bryant J Harvey C. Markou D Decamp Dm Binnie E Locci S Wasserbaech G Sanguinetti N. Marinelli I. Giehl Pr Norton Jb Hansen C Geweniger M. Apollonio U Becker F. Thomson G. Felici Patrick Janot A. Galla J Knobloch Jm Scarr Jt Chambers M. Zheng J Rothberg R. Berlich M Jacquet Ma Mcneil T Wang Williams R DellOrso R Hagelberg A. Lusiani H Videau S. Goodsir Ciulli K Smith R Miquel B. Bloch-Devaux E Focardi J Proriol P. Spagnolo J.D. Hansen J Lefrancois F Lediberder S. Emery Yb Pan W Manner L Curtis T. R. Edgecock F. Bossi P. Teixeira-Dias G Graefe J Rander S Simion R Dellamarina D Buskulic K Kleinknecht G Bologna S Werner F. Etienne G Crawford J-F Grivaz E-E Kluge F Stephan David Calvet M. Schmelling G Taylor Botterill C. Bozzi B. Vallage Hj Park F Foster Jc Thompson O Schneider Barate, R Buskulic, D Decamp, D Ghez, P Goy, C Lees, Jp Lucotte, A Minard, Mn Nief, Jy Odier, P Pietrzyk, B Casado, Mp Chmeissani, M Comas, P Crespo, Jm Delfino, M Fernandez, E Fernandezbosman, M Garrido, L Juste, A Martinez, M Miquel, R Mir, Lm Orteu, S Padilla, C Park, Ic Pascual, A Perlas, Ja Riu, I Sanchez, F Teubert, F Colaleo, A Creanza, D Depalma, M Gelao, G Iaselli, G Maggi, G Maggi, R Marinelli, N Nuzzo, S Ranieri, A Raso, G Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Tricomi, A Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Abbaneo, D Alemany, R Bazarko, Ao Brightthomas, P Cattaneo, M Cerutti, F Drevermann, H Forty, Rw Frank, M Hagelberg, R Harvey, J Janot, P Jost, B Kneringer, E Knobloch, J Lehraus, I Lutters, G Mato, P Minten, A Moneta, L Pacheco, A Pusztaszeri, Jf Ranjard, F Rensing, P Rizzo, G Rolandi, Luigi Schlatter, D Schmelling, M Schmitt, M Schneider, O Tejessy, W Tomalin, Ir Wachsmuth, H Wagner, A Ajaltouni, Z Barres, A Boyer, C Falvard, A Ferdi, C Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, Jc Pallin, D Perret, P Podlyski, F Proriol, J Rosnet, P Rossignol, Jm Fearnley, T Hansen, Jb Hansen, Jd Hansen, Jr Hansen, Ph Nilsson, B Rensch, B Waananen, A Daskalakis, G Kyriakis, A Markou, C Simopoulou, E Siotis, I Vayaki, A Zachariadou, K Blondel, A Bonneaud, G Brient, Jc Bourdon, P Rouge, A Rumpf, M Valassi, A Verderi, M Videau, H Candlin, Dj Parsons, Mi Focardi, E Parrini, G Corden, M Georgiopoulos, C Jaffe, De Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Casper, D Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, Gp Passalacqua, L Pepealtarelli, M Curtis, L Dorris, Sj Halley, Aw Knowles, Ig Lynch, Jg Oshea, V Raine, C Scarr, Jm Smith, K Teixeiradias, P Thompson, A Thomson, E Thomson, F Turnbull, Rm Becker, U Geweniger, C Graefe, G Hanke, P Hansper, G Hepp, V Kluge, Ee Putzer, A Schmidt, M Sommer, J Tittel, K Werner, S Wunsch, M Beuselinck, R Binnie, Dm Cameron, W Dornan, Pj Girone, M Goodsir, S Martin, Eb Moutoussi, A Nash, J Sedgbeer, Jk Stacey, Am Williams, Md Dissertori, G Girtler, P Kuhn, D Rudolph, G Betteridge, Ap Bowdery, Ck Colrain, P Crawford, G Finch, Aj Foster, F Hughes, G Sloan, T Williams, Mi Galla, A Giehl, I Greene, Am Hoffmann, C Jakobs, K Kleinknecht, K Quast, G Renk, B Rohne, E Sander, Hg Vangemmeren, P Zeitnitz, C Aubert, Jj Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Coyle, P Diaconu, C Etienne, F Konstantinidis, N Leroy, O Payre, P Rousseau, D Talby, M Sadouki, A Thulasidas, M Trabelsi, K Aleppo, M Ragusa, F Berlich, R Blum, W Buscher, V Dietl, H Dydak, F Ganis, G Gotzhein, C Kroha, H Lutjens, G Lutz, G Manner, W Moser, Hg Richter, R Rosadoschlosser, A Schael, S Settles, R Seywerd, H Denis, R Stenzel, H Wiedenmann, W Wolf, G Boucrot, J Callot, O Chen, S Choi, Y Cordier, A Davier, M Duflot, L Grivaz, Jf Heusse, P Hocker, A Jacholkowska, A Jacquet, M Kim, Dw Lediberder, F Lefrancois, J Lutz, Am Nikolic, I Park, Hj Schune, Mh Simion, S Veillet, Jj Videau, I Zerwas, D Azzurri, P Bagliesi, G Batignani, G Bettarini, S Bozzi, C Calderini, G Carpinelli, M Ciocci, Ma Ciulli, V Dellorso, R Fantechi, R Ferrante, I Foa, L Forti, F Giassi, A Giorgi, Ma Gregorio, A Ligabue, Franco Lusiani, Alberto Marrocchesi, P Messineo, A Palla, F Sanguinetti, G Sciaba, A Spagnolo, P Steinberger, J Tenchini, R Tonelli, G Vannini, C Venturi, A Verdini, Pg Blair, Ga Bryant, Lm Chambers, Jt Gao, Y Green, Mg Medcalf, T Perrodo, P Strong, Ja Vonwimmerspergtoeller, Jh Botterill, Dr Clifft, Rw Edgecock, Tr Haywood, S Maley, P Norton, Pr Thompson, Jc Wright, Ae Blochdevaux, B Colas, P Emery, S Kozanecki, W Lancon, E Lemaire, Mc Locci, E Perez, P Rander, J Renardy, Jf Roussarie, A Schuller, Jp Schwindling, J Trabelsi, A Vallage, B Black, Sn Dann, Jh Johnson, Rp Kim, Hy Litke, Am Mcneil, Ma Taylor, G Booth, Cn Boswell, R Brew, Caj Cartwright, S Combley, F Kelly, M Lehto, M Newton, Wm Reeve, J Thompson, Lf Bohrer, A Brandt, S Cowan, G Grupen, C Saraiva, P Smolik, L Stephan, F Apollonio, M Bosisio, L Dellamarina, R Giannini, G Gobbo, B Musolino, G Rothberg, J Wasserbaech, S Armstrong, Sr Elmer, P Feng, Z Ferguson, Dp Gonzalez, S Grahl, J Greening, Tc Hayes, Oj Hu, H Mcnamara, Pa Nachtman, Jm Orejudos, W Pan, Yb Saadi, Y Scott, Ij Walsh, J Wu, Sl Wu, X Yamartino, Jm Zheng, M Zobernig, G. Lees, J Minard, M Nief, J Casado, M Crespo, J Mir, L Park, I Perlas, J Bazarko, A Forty, R Pusztaszeri, J Rolandi, L Tomalin, I Montret, J Rossignol, J Hansen, J Hansen, P Brient, J Candlin, D Parsons, M Jaffe, D Murtas, G Dorris, S Halley, A Knowles, I Lynch, J Scarr, J Turnbull, R Kluge, E Binnie, D Dornan, P Martin, E Sedgbeer, J Stacey, A Williams, M Betteridge, A Bowdery, C Finch, A Greene, A Sander, H Aubert, J Moser, H Grivaz, J Kim, D Lutz, A Park, H Schune, M Veillet, J Ciocci, M Giorgi, M Ligabue, F Lusiani, A Verdini, P Blair, G Bryant, L Chambers, J Green, M Strong, J Vonwimmerspergtoeller, J Botterill, D Clifft, R Edgecock, T Norton, P Thompson, J Wright, A Lemaire, M Renardy, J Schuller, J Black, S Dann, J Johnson, R Kim, H Litke, A Mcneil, M Booth, C Brew, C Newton, W Thompson, L Armstrong, S Ferguson, D Greening, T Hayes, O Mcnamara, P Nachtman, J Pan, Y Scott, I Wu, S Yamartino, J Zobernig, G
Source :
Scopus-Elsevier
Abstract
Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios C-A/C-F and T-F/C-F and the strong coupling constant = C-F alpha(s), (M-Z)/(2 pi) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD. C-A/C-F = 2.20 +/- 0.09 (stat) +/- 0.13 (syst), T-F/C-F = 0.29 +/- 0.05 (stat) +/- 0.06 (syst). Fixing C-A/C-F and T-F/C-F to the QCD values permits a determination of alpha(s) (M-Z) and n(f), the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c(2) is excluded at 95% confidence level. RI ANTONELLI, ANTONELLA/C-6238-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; Sanchez, Federico/F-5809-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012
Details
Database :
OpenAIRE
Journal :
Scopus-Elsevier
Accession number :
edsair.doi.dedup.....e228ca916fa2ae850614b655907aec6f