Search for anomalous weak dipole moments of the tau lepton

Heister, A; Schael, S; Barate, R; De Bonis, I; Decamp, D; Goy, C; Lees, Jp; Merle, E; Minard, Mn; Pietrzyk, B; Bravo, S; Casado, Mp; Chmeissani, M; Crespo, Jm; Fernandez, E; Fernandez Bosman, M; Garrido, L; Martinez, M; Pacheco, A; Ruiz, H; Colaleo, A; Creanza, D; de Palma, M; Iaselli, G; Maggi, G; Maggi, M; 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; Azzurri, P; Buchmuller, O; Cattaneo, M; Cerutti, F; Clerbaux, B; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Hansen, Jb; Harvey, J; Hutchcroft, De; Janot, P; Jost, B; Kado, M; Mato, P; Moutoussi, A; Ranjard, F; Rolandi, Luigi; Schlatter, D; Schneider, O; Sguazzoni, G; Tejessy, W; Teubert, F; Valassi, A; Videau, I; Ward, J; Badaud, F; Falvard, A; Gay, P; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Kyriakis, A; Markou, C; Simopoulou, E; Vayaki, A; Zachariadou, K; Blondel, A; Bonneaud, G; Brient, Jc; Rouge, A; Rumpf, M; Swynghedauw, M; Verderi, M; Videau, H; Ciulli, V; Focardi, E; Parrini, G; Antonelli, A; Antonelli, M; Bencivenni, G; Bossi, F; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Lynch, Jg; Negus, P; O'Shea, V; Raine, C; Thompson, As; Wasserbaech, S; Cavanaugh, R; Geweniger, C; Hanke, P; Hepp, V; Kluge, Ee; Putzer, A; Stenzel, H; Tittel, K; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Marinelli, N; Sedgbeer, Jk; Thompson, Jc; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bouhova Thacker, E; Bowdery, Ck; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Pearson, Mr; Robertson, Na; Jakobs, K; Kleinknecht, K; Renk, B; Sander, Hg; Wachsmuth, H; Zeitnitz, C; Bonissent, A; Coyle, P; Leroy, O; Payre, P; Rousseau, D; Talby, M; Ragusa, F; David, A; Dietl, H; Ganis, G; Huttmann, K; Lutjens, G; Manner, W; Moser, Hg; Settles, R; Wiedenmann, W; Wolf, G; Boucrot, J; Callot, O; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacholkowska, A; Lefrancois, J; Veillet, Jj; Yuan, C; Bagliesi, G; Boccali, T; Foa, L; Giammanco, A; Giassi, A; Ligabue, Franco; Messineo, A; Palla, F; Sanguinetti, G; Sciaba, A; Tenchini, R; Venturi, A; Verdini, Pg; Blair, Ga; Cowan, G; Green, Mg; Medcalf, T; Misiejuk, A; Strong, Ja; Teixeira Dias, P; Clifft, Rw; Edgecock, Tr; Norton, Pr; Tomalin, Ir; Bloch Devaux, B; Colas, P; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Schuller, Jp; Vallage, B; Konstantinidis, N; Litke, Am; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Lehto, M; Thompson, Lf; Bohrer, A; Brandt, S; Grupen, C; Ngac, A; Prange, G; Giannini, G; Rothberg, J; Armstrong, Sr; Berkelman, K; Cranmer, K; Ferguson, Dps; Gao, Y; Gonzalez, S; Hayes, Oj; Hu, H; Jin, S; Kile, J; McNamara, Pa; Nielsen, J; Pan, Yb; von Wimmersperg Toeller JH,; Wiedenmann, W; Wu, J; Wu, Sl; Wu, X; Zobernig, G; Dissertori, G.

doi:10.1140/epjc/s2003-01286-1

The anomalous weak dipole moments of the tau lepton are measured in a data sample collected by ALEPH from 1990 to 1995 corresponding to an integrated luminosity of 155 pb(-1). Tau leptons produced in the reaction e(+)e(-) --> tau(+)tau(-) at energies close to the Z mass are studied using their semileptonic decays to pi, rho, a(1) --> pi2pi(0) or a(1)--> 3pi. The real and imaginary components of both the anomalous weak magnetic dipole moment and the CP-violating anomalous weak electric dipole moment, Re mu(tau), Im mu(tau), Re d(tau) and Im d(tau), are measured simultaneously by means of a likelihood fit built from the full differential cross section. No evidence of new physics is found. The following bounds are obtained (95% CL): \Re mu(tau)\ < 1.14 x10(-3) \ Im mu(tau)\ < 2.65 x 10(-3), \ Re d(tau)\ < 0.91 x 10(-3), and \Im d(tau)\ < 2.01 x 10(-3).

Titolo:	Search for anomalous weak dipole moments of the tau lepton
Autori:	Heister A Schael S Barate R De Bonis I Decamp D Goy C Lees JP Merle E Minard MN Pietrzyk B Bravo S Casado MP Chmeissani M Crespo JM Fernandez E Fernandez Bosman M Garrido L Martinez M Pacheco A Ruiz H Colaleo A Creanza D de Palma M Iaselli G Maggi G Maggi M 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 Azzurri P Buchmuller O Cattaneo M Cerutti F Clerbaux B Drevermann H Forty RW Frank M Gianotti F Hansen JB Harvey J Hutchcroft DE Janot P Jost B Kado M Mato P Moutoussi A Ranjard F ROLANDI, LUIGI Schlatter D Schneider O Sguazzoni G Tejessy W Teubert F Valassi A Videau I Ward J Badaud F Falvard A Gay P Henrard P Jousset J Michel B Monteil S Montret JC Pallin D Perret P Hansen JD Hansen JR Hansen PH Nilsson BS Kyriakis A Markou C Simopoulou E Vayaki A Zachariadou K Blondel A Bonneaud G Brient JC Rouge A Rumpf M Swynghedauw M Verderi M Videau H Ciulli V Focardi E Parrini G Antonelli A Antonelli M Bencivenni G Bossi F Capon G Chiarella V Laurelli P Mannocchi G Murtas GP Passalacqua L Pepe Altarelli M Lynch JG Negus P O'Shea V Raine C Thompson AS Wasserbaech S Cavanaugh R Geweniger C Hanke P Hepp V Kluge EE Putzer A Stenzel H Tittel K Wunsch M Beuselinck R Binnie DM Cameron W Dornan PJ Girone M Marinelli N Sedgbeer JK Thompson JC Ghete VM Girtler P Kneringer E Kuhn D Rudolph G Bouhova Thacker E Bowdery CK Finch AJ Foster F Hughes G Jones RWL Pearson MR Robertson NA Jakobs K Kleinknecht K Renk B Sander HG Wachsmuth H Zeitnitz C Bonissent A Coyle P Leroy O Payre P Rousseau D Talby M Ragusa F David A Dietl H Ganis G Huttmann K Lutjens G Manner W Moser HG Settles R Wiedenmann W Wolf G Boucrot J Callot O Davier M Duflot L Grivaz JF Heusse P Jacholkowska A Lefrancois J Veillet JJ Yuan C Bagliesi G Boccali T Foa L Giammanco A Giassi A LIGABUE, FRANCO Messineo A Palla F Sanguinetti G Sciaba A Tenchini R Venturi A Verdini PG Blair GA Cowan G Green MG Medcalf T Misiejuk A Strong JA Teixeira Dias P Clifft RW Edgecock TR Norton PR Tomalin IR Bloch Devaux B Colas P Lancon E Lemaire MC Locci E Perez P Rander J Schuller JP Vallage B Konstantinidis N Litke AM Taylor G Booth CN Cartwright S Combley F Lehto M Thompson LF Bohrer A Brandt S Grupen C Ngac A Prange G Giannini G Rothberg J Armstrong SR Berkelman K Cranmer K Ferguson DPS Gao Y Gonzalez S Hayes OJ Hu H Jin S Kile J McNamara PA Nielsen J Pan YB von Wimmersperg Toeller JH Wiedenmann W Wu J Wu SL Wu X Zobernig G Dissertori G. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2003
Rivista:	THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract:	The anomalous weak dipole moments of the tau lepton are measured in a data sample collected by ALEPH from 1990 to 1995 corresponding to an integrated luminosity of 155 pb(-1). Tau leptons produced in the reaction e(+)e(-) --> tau(+)tau(-) at energies close to the Z mass are studied using their semileptonic decays to pi, rho, a(1) --> pi2pi(0) or a(1)--> 3pi. The real and imaginary components of both the anomalous weak magnetic dipole moment and the CP-violating anomalous weak electric dipole moment, Re mu(tau), Im mu(tau), Re d(tau) and Im d(tau), are measured simultaneously by means of a likelihood fit built from the full differential cross section. No evidence of new physics is found. The following bounds are obtained (95% CL): \Re mu(tau)\ < 1.14 x10(-3) \ Im mu(tau)\ < 2.65 x 10(-3), \ Re d(tau)\ < 0.91 x 10(-3), and \Im d(tau)\ < 2.01 x 10(-3).
Handle:	http://hdl.handle.net/11384/5167
Appare nelle tipologie:	1.1 Articolo in rivista

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