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Account

Table 3 Summary of the background modelling systematic uncertainties considered

From: Direct constraint on the Higgs–charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector

\({\textbf {VH}}(\rightarrow b{\bar{b}})\)

   \(WH(\rightarrow b{\bar{b}})\) normalisation

27%

   \(ZH(\rightarrow b{\bar{b}})\) normalisation

25%

Diboson

   WW/ZZ/WZ acceptance

10%/5%/12%

   \(p_{\text {T}} ^V\) acceptance

4%

   \(N_{\mathrm {jet}}\) acceptance

7%–11%

Z \(+\) jets

   \(Z\,+\) hf normalisation

Floating

   \(Z\,+\) mf normalisation

Floating

   \(Z\,+\) lf normalisation

Floating

   \(Z\,{+}\,bb\) to \(Z\,{+}\,cc\) ratio

20%

   \(Z\,{+}\,bl\) to \(Z\,{+}\,cl\) ratio

18%

   \(Z\,{+}\,bc\) to \(Z\,{+}\,cl\) ratio

6%

   \(p_{\text {T}} ^V\) acceptance

1%–8%

   \(N_{\mathrm {jet}}\) acceptance

10%–37%

   High-\(\Delta R\) CR to SR

12%–37%

   0- to 2-lepton ratio

4%–5%

W4\(+\)jets

   \(W+\,\)hf normalisation

Floating

   \(W+\,\)mf normalisation

Floating

   \(W+\,\)lf normalisation

Floating

   \(W{+}\,bb\) to \(W{+}\,cc\) ratio

4%–10%

   \(W{+}\,bl\) to \(W{+}\,cl\) ratio

31%–32%

   \(W{+}\,bc\) to \(W{+}\,cl\) ratio

31%–33%

   \(W\rightarrow \tau \nu (+ c)\) to \(W{+}\,cl\) ratio

11%

   \(W\rightarrow \tau \nu (+ b)\) to \(W{+}\,cl\) ratio

27%

   \(W\rightarrow \tau \nu (+ l)\) to \(W{+}\,l\) ratio

8%

   \(N_{\mathrm {jet}}\) acceptance

8%–14%

   High-\(\Delta R\) CR to SR

15%–29%

   \(W\rightarrow \tau \nu \) SR to high-\(\Delta R\) CR ratio

5%–18%

   0- to 1-lepton ratio

1%– 6%

Top quark (0- and 1-lepton)

   Top(b) normalisation

Floating

   Top(other) normalisation

Floating

   \(N_{\mathrm {jet}}\) acceptance

7%–9%

   0- to 1-lepton ratio

4%

   SR/top CR acceptance (\(t{\bar{t}}\))

9%

   SR/top CR acceptance (Wt)

16%

   Wt / \(t{\bar{t}}\) ratio

10%

Top quark (2-lepton)

   Normalisation

Floating

Multi-jet (1-lepton)

   Normalisation

20%–100%

  1. The values given refer to the size of the uncertainty affecting the yield of each background. Where the size of an acceptance systematic uncertainty varies between analysis regions, a range is displayed. Uncertainties in the shapes of the \(m_{cc}\) distributions are not shown below, but are taken into account for all backgrounds. CR and SR stand for control region and signal region