Measuring Higgs Couplings from LHC Data

TL;DR

For a Higgs boson mass of 125 GeV, several Higgs couplings are determined from published 2011 data and extrapolate the results towards different scenarios of LHC running.

Abstract

Following recent ATLAS and CMS publications we interpret the results of their Higgs searches in terms of Standard Model operators. For a Higgs mass of 125 GeV we determine several Higgs couplings from 2011 data and extrapolate the results towards different scenarios of LHC running. Even though our analysis is limited by low statistics we already derive meaningful constraints on modified Higgs sectors.

Figures (4)

• Figure 1: $\Delta_t$ vs $\Delta_b$ for the expected SM measurements (left) and the actual measurements (right), assuming $m_H = 125$ GeV. The diagonal line separates the SM and the large-coupling solutions. For the actual data both solutions overlap.
• Figure 2: Results with 2011 data, for the SM signal expectation and for the data ($m_H = 125$ GeV). For the latter we also show $\Delta_W = \Delta_Z$. The band indicates a $\pm 20\%$ variation.
• Figure 3: Projections for an assumed SM signal at $m_H = 125$ GeV. The band indicates a $\pm 20\%$ variation.
• Figure 4: Error bars for an assumed SM signal as a function of the Higgs mass for 2011 data (top) and the HL-LHC with 14 TeV and $3000~{\rm fb^{-1}}$ (bottom).