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

Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors
Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors
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 GeVMH140 GeV, produced in pairs via vector-vector fusion, Higgs-strahlung and associate production with heavy-quarks and decaying into b 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.
beyond standard model, Higgs physics
1-16
Moretti, Mauro
6e38fb7b-4fae-4315-877a-3c405f49f4b6
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Piccinini, Fulvio
e702e1be-5e5a-43da-8d73-7269ebada0fd
Pittau, Roberto
861b9b08-a212-488d-b132-620db78d9775
Polosa, Antonio D.
5538aa9f-80ad-4028-bb54-d29dfb350044
Moretti, Mauro
6e38fb7b-4fae-4315-877a-3c405f49f4b6
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Piccinini, Fulvio
e702e1be-5e5a-43da-8d73-7269ebada0fd
Pittau, Roberto
861b9b08-a212-488d-b132-620db78d9775
Polosa, Antonio D.
5538aa9f-80ad-4028-bb54-d29dfb350044

Moretti, Mauro, Moretti, Stefano, Piccinini, Fulvio, Pittau, Roberto and Polosa, Antonio D. (2005) Higgs boson self-couplings at the LHC as a probe of extended Higgs sectors. Journal of High Energy Physics, 2 (24), 1-16. (doi:10.1088/1126-6708/2005/02/024).

Record type: Article

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 GeVMH140 GeV, produced in pairs via vector-vector fusion, Higgs-strahlung and associate production with heavy-quarks and decaying into b 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.

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More information

Published date: 2005
Keywords: beyond standard model, Higgs physics

Identifiers

Local EPrints ID: 57476
URI: http://eprints.soton.ac.uk/id/eprint/57476
PURE UUID: 67d91fcd-2d03-4c03-98a7-8a14c48ceef7

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Date deposited: 14 Aug 2008
Last modified: 11 Nov 2019 19:22

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