Four-fermion production at $\gamma\gamma$ colliders: 1. Lowest-order predictions and anomalous couplings
نویسندگان
چکیده
منابع مشابه
Four-fermion production at γγ colliders: 1. Lowest-order predictions and anomalous couplings
We have constructed a Monte Carlo generator for lowest-order predictions for the processes γγ → 4f and γγ → 4fγ in the Standard Model and extensions thereof by an effective γγH coupling as well as anomalous triple and quartic gauge-boson couplings. Polarization is fully supported, and a realistic photon beam spectrum can be taken into account. For the processes γγ → 4f all helicity amplitudes a...
متن کاملFour-Fermion Production with Anomalous Couplings at LEP2 and NLC1
I give a short report on the semi-analytical approach to off-shell W pair production. In particular, I show the effects of irreducible background diagrams of the CC11 class in the differential cross-section. Further, I study the influence of potential anomalous couplings at a future linear collider and investigate the sensitivity of the forward-backward asymmetry to anomalous couplings. Talk gi...
متن کاملAnomalous Higgs Couplings at Colliders
I summarize our results on the attainable limits on the coefficients of dimension–6 operators from the analysis of Higgs boson phenomenology using data taken at Tevatron RUNI and LEPII. Our results show that the coefficients of Higgs–vector boson couplings can be determined with unprecedented accuracy. Assuming that the coefficients of all “blind” operators are of the same magnitude, we are als...
متن کاملFour-fermion production and limits on anomalous couplings at LEP-2
Electroweak processes with four fermions in the final state were measured extensively at LEP-2 in e+ecollisions with centre-of-mass energies up to 209 GeV. By combining the results obtained by Aleph, Delphi, L3 and Opal, the predictions from the Standard Model were probed at the level of their present accuracy. An important outcome was the possibility to measure the predicted charged triple gau...
متن کاملSEARCH FOR ANOMALOUS COUPLINGS AT eγ COLLIDERS
We consider the possibility of observing deviations from the Standard Model gauge-boson self-couplings at future eγ colliders. We concentrate on the process eγ → νWZ, which is particularly sensitive to the parity violating coupling gZ 5 at high energies. We find that a 2 TeV e +e− collider operating in the eγ mode could reach a sensitivity of order 5× 10−3 to gZ 5 .
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2004
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s2004-01948-4