Higgs Boson Self-Coupling at High Energy gamma gamma Collider

A GUTIÉRREZ-RODRÍGUEZ; JAVIER PERESSUTTI; OSCAR ALFREDO SAMPAYO

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2011 vol. 38 p. 95002 - 95002

0954-3899

We analyzed the double production and the triple self-coupling of the standard model Higgs boson at future £^£^ collider energies, with the reactions £^£^ ¡÷£^£^ collider energies, with the reactions £^£^ ¡÷ f f¡ÂHH (f = b, t). We evaluated the total cross-section for f f¡ÂHH and calculated the total number of events considering the complete set of Feynman diagrams at the tree level and for different values of the triple coupling £e£fHHH. We have also analyzed the sensitivity for the considered reaction and we show the results as 95% CL regions in the £e¡VMH plane for different values of the center-of-mass energy and different levels of background. The numerical computation was done for the energies which are expected to be available at a possible future linear £^£^ collider with a center-of-mass energy 500¡V 3000 GeV and luminosities of 1 and 5 ab¡ÂHH (f = b, t). We evaluated the total cross-section for f f¡ÂHH and calculated the total number of events considering the complete set of Feynman diagrams at the tree level and for different values of the triple coupling £e£fHHH. We have also analyzed the sensitivity for the considered reaction and we show the results as 95% CL regions in the £e¡VMH plane for different values of the center-of-mass energy and different levels of background. The numerical computation was done for the energies which are expected to be available at a possible future linear £^£^ collider with a center-of-mass energy 500¡V 3000 GeV and luminosities of 1 and 5 ab£e£fHHH. We have also analyzed the sensitivity for the considered reaction and we show the results as 95% CL regions in the £e¡VMH plane for different values of the center-of-mass energy and different levels of background. The numerical computation was done for the energies which are expected to be available at a possible future linear £^£^ collider with a center-of-mass energy 500¡V 3000 GeV and luminosities of 1 and 5 ab£e¡VMH plane for different values of the center-of-mass energy and different levels of background. The numerical computation was done for the energies which are expected to be available at a possible future linear £^£^ collider with a center-of-mass energy 500¡V 3000 GeV and luminosities of 1 and 5 ab£^£^ collider with a center-of-mass energy 500¡V 3000 GeV and luminosities of 1 and 5 abab −1. We found that the number of events for the process £^£^ ¡÷ t ¡ÂtHH, taking into account the decay products of both t and H, is small but enough to obtain information on the triple Higgs boson self-coupling in an independent way, complementing other studies on the triple vertex.1. We found that the number of events for the process £^£^ ¡÷ t ¡ÂtHH, taking into account the decay products of both t and H, is small but enough to obtain information on the triple Higgs boson self-coupling in an independent way, complementing other studies on the triple vertex.£^£^ ¡÷ t ¡ÂtHH, taking into account the decay products of both t and H, is small but enough to obtain information on the triple Higgs boson self-coupling in an independent way, complementing other studies on the triple vertex.t and H, is small but enough to obtain information on the triple Higgs boson self-coupling in an independent way, complementing other studies on the triple vertex.