Alejandro Gutierrez-Rodriguez

The Triple Higgs Boson Self-Coupling at Future Linear e+e- Colliders Energies: ILC and CLIC

We analyzed the triple Higgs boson self-coupling at future e + e - colliders energies, with the reactions e + e - → b bar b H H , t bar t H H . We evaluate the total cross-sections for both b bar b H H and t bar t H H , and calculate the total number of events considering the complete set of Feynman diagrams at tree-level. We vary the triple coupling κλ 3H within the range κ=-1 and +2. The numerical computation is done for the energies expected to be available at a possible Future Linear e + e - Collider with a center-of-mass energy 800, 1000, 1500 GeV and a luminosity 1000 fb -1 . Our analysis is also extended to a center-of-mass energy 3 TeV and luminosities of 1000 and 5000 fb -1 . We found that for the process e + e - → b bar b H H , the complete calculation differs only by 3% from the approximate calculation e + e - → Z H H ( Z → b bar b ), while for the process e + e - → t bar t H H , the expected number of events, considering the decay products of both t and H , is not enough to obtain an ac...

Bounds on the anomalous HZγ vertex arising from the process e+e− → τ+τ−γ

We obtain limits on the anomalous coupling

Higgs bosons production and decay at future

HZgamma

e^+e^-

through data published by the L3 Collaboration on the process

linear colliders as a probe of the B–L model

e^+e^-to tau^+tau^- gamma

Dipole moments of the tau-lepton and Z–Z′ mixing angle induced in a 331 model

. Our analysis leads to bounds on this coupling of order

Higgs boson self-coupling at a high-energy γγ collider

10^{-2}

Bounding the Anomalous HZγ Coupling via the Process e+e− → τ+τ−γ

, for an intermediate mass Higgs boson

Triple Higgs Boson Self-Coupling in a γγ Collider

115 < M_H < 145