A study of two-Higgs-doublet models (2HDM) in the decoupling limit reveals the existence of parameter configurations with a large triple-Higgs self-coupling as the only low-energy trace of the departure from a Standard Model (SM) Higgs sector. This observation encourages attempts to search for double Higgs production at the Large Hadron Collider (LHC) even in mass regions which have been shown to be very hard to probe in the context of SM-like Higgs self-couplings. In this document we consider the case of an Intermediate Mass Higgs (IMH) boson, with 120 GeV less than or similar to M-H less than or similar to 140 GeV, produced in pairs via vector-vector fusion, Higgs-strahlung and associate production with heavy-quarks and decaying into b (b) over bar pairs. After a detailed signal-to-background analysis, we confirm that the observation of a Higgs-pair signal is very challenging in the framework of the SM, even at the LHC with upgraded luminosity. In contrast, we verify that the sensitivity is sufficient to detect departures from the SM which would escape detection in the measurements of the single-Higgs production channels.

Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors / M., Moretti; S., Moretti; F., Piccinini; R., Pittau; Polosa, ANTONIO DAVIDE. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2005:02(2005), pp. 024-024. [10.1088/1126-6708/2005/02/024]

Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors

POLOSA, ANTONIO DAVIDE
2005

Abstract

A study of two-Higgs-doublet models (2HDM) in the decoupling limit reveals the existence of parameter configurations with a large triple-Higgs self-coupling as the only low-energy trace of the departure from a Standard Model (SM) Higgs sector. This observation encourages attempts to search for double Higgs production at the Large Hadron Collider (LHC) even in mass regions which have been shown to be very hard to probe in the context of SM-like Higgs self-couplings. In this document we consider the case of an Intermediate Mass Higgs (IMH) boson, with 120 GeV less than or similar to M-H less than or similar to 140 GeV, produced in pairs via vector-vector fusion, Higgs-strahlung and associate production with heavy-quarks and decaying into b (b) over bar pairs. After a detailed signal-to-background analysis, we confirm that the observation of a Higgs-pair signal is very challenging in the framework of the SM, even at the LHC with upgraded luminosity. In contrast, we verify that the sensitivity is sufficient to detect departures from the SM which would escape detection in the measurements of the single-Higgs production channels.
2005
beyond standard model; higgs physics
01 Pubblicazione su rivista::01a Articolo in rivista
Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors / M., Moretti; S., Moretti; F., Piccinini; R., Pittau; Polosa, ANTONIO DAVIDE. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2005:02(2005), pp. 024-024. [10.1088/1126-6708/2005/02/024]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/135228
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