Probing anomalous triple boson vertices at future {ital e}{sup +}{ital e}{sup {minus}} colliders
- Ottawa-Carleton Institute for Physics, Physics Department, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6 (Canada)
- Institute of Mathematical Sciences, CIT Campus Taramani, Madras 600113 (India)
We explore the detection potential of the four lepton production processes {ital e}{sup +}{ital e}{sup {minus}}{r_arrow}{ital l}{sup +}{nu}{ital l}{prime}{sup {minus}}{bar {nu}} for anomalous contributions to the triple boson vertices at proposed future high energy colliders with center-of-mass energies of 500 GeV and 1 TeV. The predicted bounds are of the order of a few percent for the {ital CP}-even couplings {kappa}{sub {ital V}} ({ital V}={gamma},{ital Z}) at the higher energy; we show that these limits can be improved by as much as a factor of 2 through suitable phase space cuts. A polarized beam facility, with its ability to access helicity information, could provide constraints on the vertices significantly tighter than those achievable from an analysis of total cross section alone. The bounds on the {ital CP}-odd coupling {tilde {lambda}}{sub {ital V}} approach the indirect bounds from neutron electric dipole measurements while those on {tilde {kappa}}{sub {ital V}} are much looser. The asymmetries in experimental observables produced by such an explicitly {ital CP}-violating triple vertex contribution are seen to be below the expected level of statistical precision of approximately 1.5%; asymmetries in the individual contributing helicity amplitudes might however be detectable.
- OSTI ID:
- 250491
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 52; ISSN 0556-2821; ISSN PRVDAQ
- Country of Publication:
- United States
- Language:
- English
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