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

L3 Collaboration

doi:10.1016/j.physletb.2004.02.012

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

L3 Collaboration

Physics and Astronomy

University of Geneva
University of Florence
CIEMAT
University of Lausanne
CERN
University of Naples Federico II
Swiss Federal Institute of Technology Zurich
Louisiana State University
Nuclear Physics Institute
University of Bologna
Alikhanov Institute for Theoretical and Experimental Physics
University of Michigan, Ann Arbor
Tata Institute of Fundamental Research
University of Rome La Sapienza
Florida Institute of Technology
University of Amsterdam
IN2P3-CNRS
Paul Scherrer Institute
Purdue University
University of Perugia
Massachusetts Institute of Technology
Carnegie Mellon University
RWTH Aachen University
Hungarian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

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 ≤ W_γγ ≤ 40 GeV. Good agreement is found between these measurements and the O(α⁴) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.

Original language	English
Pages (from-to)	53-62
Number of pages	10
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	585
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2004.02.012
State	Published - Apr 8 2004

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10.1016/j.physletb.2004.02.012

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@article{82017d2c0fa740e98fde436adc58808c,

title = "Muon-pair and tau-pair production in two-photon collisions at LEP",

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(α4) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.",

author = "\{L3 Collaboration\} and P. Achard and O. Adriani and M. Aguilar-Benitez and J. Alcaraz and G. Alemanni and J. Allaby and A. Aloisio and Alviggi, \{M. G.\} and H. Anderhub and Andreev, \{V. P.\} and F. Anselmo and A. Arefiev and T. Azemoon and T. Aziz and P. Bagnaia and A. Bajo and G. Baksay and L. Baksay and Baldew, \{S. V.\} and S. Banerjee and Sw Banerjee and A. Barczyk and R. Barill{\`e}re and P. Bartalini and M. Basile and N. Batalova and R. Battiston and A. Bay and F. Becattini and U. Becker and F. Behner and L. Bellucci and R. Berbeco and J. Berdugo and P. Berges and B. Bertucci and Betev, \{B. L.\} and M. Biasini and M. Biglietti and A. Biland and Blaising, \{J. J.\} and Blyth, \{S. C.\} and Bobbink, \{G. J.\} and A. B{\"o}hm and L. Boldizsar and B. Borgia and S. Bottai and D. Bourilkov and M. Bourquin and K. Dehmelt",

note = "Publisher Copyright: {\textcopyright} 2004 Published by Elsevier B.V.",

year = "2004",

month = apr,

day = "8",

doi = "10.1016/j.physletb.2004.02.012",

language = "English",

volume = "585",

pages = "53--62",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "1-2",

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TY - JOUR

T1 - Muon-pair and tau-pair production in two-photon collisions at LEP

AU - L3 Collaboration

AU - Achard, P.

AU - Adriani, O.

AU - Aguilar-Benitez, M.

AU - Alcaraz, J.

AU - Alemanni, G.

AU - Allaby, J.

AU - Aloisio, A.

AU - Alviggi, M. G.

AU - Anderhub, H.

AU - Andreev, V. P.

AU - Anselmo, F.

AU - Arefiev, A.

AU - Azemoon, T.

AU - Aziz, T.

AU - Bagnaia, P.

AU - Bajo, A.

AU - Baksay, G.

AU - Baksay, L.

AU - Baldew, S. V.

AU - Banerjee, S.

AU - Banerjee, Sw

AU - Barczyk, A.

AU - Barillère, R.

AU - Bartalini, P.

AU - Basile, M.

AU - Batalova, N.

AU - Battiston, R.

AU - Bay, A.

AU - Becattini, F.

AU - Becker, U.

AU - Behner, F.

AU - Bellucci, L.

AU - Berbeco, R.

AU - Berdugo, J.

AU - Berges, P.

AU - Bertucci, B.

AU - Betev, B. L.

AU - Biasini, M.

AU - Biglietti, M.

AU - Biland, A.

AU - Blaising, J. J.

AU - Blyth, S. C.

AU - Bobbink, G. J.

AU - Böhm, A.

AU - Boldizsar, L.

AU - Borgia, B.

AU - Bottai, S.

AU - Bourilkov, D.

AU - Bourquin, M.

AU - Dehmelt, K.

PY - 2004/4/8

Y1 - 2004/4/8

N2 - 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(α4) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.

AB - 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(α4) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.

UR - https://www.scopus.com/pages/publications/12144289200

U2 - 10.1016/j.physletb.2004.02.012

DO - 10.1016/j.physletb.2004.02.012

M3 - Article

AN - SCOPUS:12144289200

SN - 0370-2693

VL - 585

SP - 53

EP - 62

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

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

IS - 1-2

ER -

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

Abstract

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