Higgs physics: Review of recent results and prospects from ATLAS and CMS

Martin Flechl,Atlas And Cms Collaborations

doi:10.1088/1742-6596/631/1/012028

Martin Flechl, Atlas And Cms Collaborations

Open Access

https://doi.org/10.1088/1742-6596/631/1/012028

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Abstract

An overview of recent results in Higgs boson physics obtained with the ATLAS and CMS experiments at the Large Hadron Collider located at CERN, Geneva, is presented. The focus is on measurements of the properties of the recently discovered Higgs boson with a mass of about 125 GeV. A brief selection of results in searches for Higgs bosons beyond the Standard Model is given, and prospects of future Higgs boson measurements and searches at the LHC are discussed.

Highlights

In July 2012, the ATLAS [1] and CMS [2] collaborations announced the discovery of a new particle compatible with being the Higgs boson of the Standard Model (SM) [3, 4]
The most recent results from studies of this Higgs boson using the data collected with the ATLAS and CMS experiments are presented
Searches for Higgs bosons predicted by theories beyond the Standard Model (BSM) are briefly summarized and prospects for future Higgs boson property measurements are discussed

Summary

Introduction

In July 2012, the ATLAS [1] and CMS [2] collaborations announced the discovery of a new particle compatible with being the Higgs boson of the Standard Model (SM) [3, 4]. The signal is visible on top of the estimated background at mγγ ≈ 125 GeV Both ATLAS and CMS observe slightly more H → γγ candidate events than expected; the measurement is within one Gaussian standard deviation (σ) of the SM expectation. Both experiments measure the signal strength μ (observed cross section times branching ratio divided by the SM expectation) individually for the various Higgs boson production modes, see Fig. 2. H → 4l The expected rate of H → 4 lepton events is low compared to the other channels presented here; this is compensated by the highest signal-over-background ratio This channel is further characterized by a high mass resolution (m4l) and dominates the Higgs boson mass measurement together with H → γγ.

Background

ATLAS Preliminary

Coupling strength κV Preliminary

MSSM Higgs boson searches tanβ

Signal strength and coupling strength projections

Conclusions