Abstract
Two important properties of a Higgs boson are its mass and width. They may distinguish the Standard Model (SM) Higgs boson from Higgs bosons of extended models. We show results from a direct mass and width reconstruction for a Higgs boson mass range from 120 to 340 GeV/c2. The mass and width have been reconstructed from the H → ZZ* → µ+µ−µ+µ− reaction in an LHC simulation of the CMS detector. The determined mass accuracy has been compared with that obtained from studies for a linear collider (LC). The mass precision from the latter studies are derived by scaling previous LC simulation results according to the expected event rates. For the Higgs boson width we compare a direct determination with indirect methods and find good complementarity.
Highlights
The search for Higgs bosons is one of the main goals of future colliders
We have investigated the accuracy with which the Higgs boson mass and width could be measured at the LHC in the four-muon channel
These are compared with the results from linear collider (LC) studies extrapolated into the range 120 - 340 GeV/c2 in the case of the mass determination
Summary
The search for Higgs bosons is one of the main goals of future colliders. After a discovery it will be very important to establish the properties of the Higgs boson. Results from an LHC study are given for the gluon fusion process where the Higgs boson mass is reconstructed by calculating the invariant mass of the four-muon final state. The invariant four-muon mass distribution is shown in Fig. 1 for three different Higgs boson masses. A description of the Higgs mass determination of the other LHC experiment, ATLAS, can be found in Ref. 4. This LHC study has been compared with two LC studies which have been extrapolated to the mass range investigated here. In a second study the ZH → bbqqchannel was investigated 6 In this channel the Higgs boson mass was calculated from the invariant mass of the bbsystem.
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