Muon-pair and tau-pair production in two-photon collisions at LEP

Achard, P.; Adriani, O.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, V.P.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillère, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Böhm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; De La Cruz, B.; Cucciarelli, S.; Van Dalen, J.A.; De Asmundis, R.; Déglon, P.; Debreczeni, J.; Degré, A.; Dehmelt, K.; Deiters, K.; Della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.

doi:10.1016/j.physletb.2004.02.012

Achard, P.; Adriani, O.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, V.P.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillère, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Böhm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; De La Cruz, B.; Cucciarelli, S.; Van Dalen, J.A.; De Asmundis, R.; Déglon, P.; Debreczeni, J.; Degré, A.; Dehmelt, K.; Deiters, K.; Della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.

2004

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Abstract

The QED processes e+e-→e+e -μ+μ- and e+e -→e+e-τ+τ- are studied with the L3 detector at LEP using an untagged data sample collected at centre-of-mass energies 161 GeV≤√s≤209 GeV. The τ-pairs are observed through the associated decay of one τ into eνν and the other into ππν. The cross sections are measured as a function of √s. For muon pairs, the cross section of the γγ→μ +μ- process is also measured as a function of the two-photon centre-of-mass energy for 3 GeV≤Wγγ≤40 GeV. Good agreement is found between these measurements and the O(α 4) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted. © 2004 Published by Elsevier B.V.

Details

Title Muon-pair and tau-pair production in two-photon collisions at LEP

Author(s) Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Alcaraz, J. ; Alemanni, G. ; Allaby, J. ; Aloisio, A. ; Alviggi, M.G. ; Anderhub, H. ; Andreev, V.P. ; Anselmo, F. ; Arefiev, A. ; Azemoon, T. ; Aziz, T. ; Bagnaia, P. ; Bajo, A. ; Baksay, G. ; Baksay, L. ; Baldew, S.V. ; Banerjee, S. ; Banerjee, Sw. ; Barczyk, A. ; Barillère, R. ; Bartalini, P. ; Basile, M. ; Batalova, N. ; Battiston, R. ; Bay, A. ; Becattini, F. ; Becker, U. ; Behner, F. ; Bellucci, L. ; Berbeco, R. ; Berdugo, J. ; Berges, P. ; Bertucci, B. ; Betev, B.L. ; Biasini, M. ; Biglietti, M. ; Biland, A. ; Blaising, J.J. ; Blyth, S.C. ; Bobbink, G.J. ; Böhm, A. ; Boldizsar, L. ; Borgia, B. ; Bottai, S. ; Bourilkov, D. ; Bourquin, M. ; Braccini, S. ; Branson, J.G. ; Brochu, F. ; Burger, J.D. ; Burger, W.J. ; Cai, X.D. ; Capell, M. ; Cara Romeo, G. ; Carlino, G. ; Cartacci, A. ; Casaus, J. ; Cavallari, F. ; Cavallo, N. ; Cecchi, C. ; Cerrada, M. ; Chamizo, M. ; Chang, Y.H. ; Chemarin, M. ; Chen, A. ; Chen, G. ; Chen, G.M. ; Chen, H.F. ; Chen, H.S. ; Chiefari, G. ; Cifarelli, L. ; Cindolo, F. ; Clare, I. ; Clare, R. ; Coignet, G. ; Colino, N. ; Costantini, S. ; De La Cruz, B. ; Cucciarelli, S. ; Van Dalen, J.A. ; De Asmundis, R. ; Déglon, P. ; Debreczeni, J. ; Degré, A. ; Dehmelt, K. ; Deiters, K. ; Della Volpe, D. ; Delmeire, E. ; Denes, P. ; DeNotaristefani, F. ; De Salvo, A. ; Diemoz, M. ; Dierckxsens, M. ; Dionisi, C. ; Dittmar, M. ; Doria, A.

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

Volume 585

Issue 1-2

Pages 53-62

Date 2004

ISSN 03702693

DOI https://doi.org/10.1016/j.physletb.2004.02.012

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Laboratories LPHE

Record Appears in Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LPHE - High Energy Physics Laboratory
Peer-reviewed publications
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Record creation date 2010-11-05