Effective-Lagrangian approach to gamma gamma --> WW; II: Results and comparison with e+e- --> WW

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dc.creatorNachtmann, O.
dc.creatorNagel, F.
dc.creatorPospischil, M.
dc.creatorUtermann, A.
dc.date2005-08-11
dc.date2006-04-21
dc.date.accessioned2026-07-07T12:25:13Z
dc.date.available2026-07-07T12:25:13Z
dc.descriptionWe present a study of anomalous electroweak gauge-boson couplings which can be measured in e+e- and gamma gamma collisions at a future linear collider like ILC. We consider the gauge-boson sector of a locally SU(2) x U(1) invariant effective Lagrangian with ten dimension-six operators added to the Lagrangian of the Standard Model. These operators induce anomalous three- and four-gauge-boson couplings and an anomalous gamma gamma H coupling. We calculate the reachable sensitivity for the measurement of the anomalous couplings in gamma gamma --> WW. We compare these results with the reachable precision in the reaction e+e- --> WW on the one hand and with the bounds that one can get from high-precision observables in Z decays on the other hand. We show that one needs both the e+e- and the gamma gamma modes at an ILC to constrain the largest possible number of anomalous couplings and that the Giga-Z mode offers the best sensitivity for certain anomalous couplings.
dc.description25 pages, 1 figure, 7 tables, comments, references and a table added; to appear in EPJC
dc.identifierhttps://arxiv.org/abs/hep-ph/0508133
dc.identifierhttp://arxiv.org/abs/hep-ph/0508133
dc.identifierEur.Phys.J.C46:93-105,2006
dc.identifierdoi:10.1140/epjc/s2006-02474-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214551
dc.subjectHigh Energy Physics - Phenomenology
dc.titleEffective-Lagrangian approach to gamma gamma --> WW; II: Results and comparison with e+e- --> WW
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