CMS-PAS-SMP-13-012

CMS-PAS-SMP-13-012
Measurement of the cross section of the electroweak production of a W boson with two jets in pp collisions at $\sqrt{s} =$ 8 TeV
CMS Collaboration
July 2015

Abstract: We present a measurement of the electroweak production cross section of a W boson in association with two jets events in pp collisions at $\sqrt{s} =$ 8 TeV. The analyzed dataset corresponds to an integrated luminosity of 19.3 fb $^{-1}$ collected by the CMS detector at the LHC. The measured value of the cross section in the fiducial region for electroweak production of W (W $\to\ell\nu$ , with $\ell={\mathrm{e}},{{\mu}}$ )+2 jets is 0.42 $\pm$ 0.04 (stat.) $\pm$ 0.09 (syst.) $\pm$ 0.01 (lumi.) pb, which is consistent with the standard model prediction of 0.50 $\pm$ 0.02 (scale) $\pm$ 0.02 (PDF) pb obtained by MADGRAPH interfaced to PYTHIA 6.
Links: CDS record (PDF) ; Public twiki page ; CADI line (restricted) ; Figures are also available from the CDS record. These preliminary results are superseded in this paper, JHEP 11 (2016) 147. The superseded preliminary plots can be found here.

Figures
png ; pdf	Figure 1-a: Representative diagrams for EWK $\ell \nu \mathrm{jj}$ productions at the LHC: (a) Bremsstrahlung, (b) VBF, and (c) Multiperipheral processes.
png ; pdf	Figure 1-b: Representative diagrams for EWK $\ell \nu \mathrm{jj}$ productions at the LHC: (a) Bremsstrahlung, (b) VBF, and (c) Multiperipheral processes.
png ; pdf	Figure 1-c: Representative diagrams for EWK $\ell \nu \mathrm{jj}$ productions at the LHC: (a) Bremsstrahlung, (b) VBF, and (c) Multiperipheral processes.
png ; pdf	Figure 2-a: BDT discriminant output in muon (a) and electron (b) channel.
png ; pdf	Figure 2-b: BDT discriminant output in muon (a) and electron (b) channel.
png ; pdf	Figure 3-a: Comparison of the leading jet $p_{\mathrm{T}}$ distributions between data and MC for muon (a) and electron (b) channel.
png ; pdf	Figure 3-b: Comparison of the leading jet $p_{\mathrm{T}}$ distributions between data and MC for muon (a) and electron (b) channel.
png ; pdf	Figure 4-a: Comparison of the $\Delta \eta$ between the two tag jets distributions between data and MC for the muon (a) and electron (b) channel.
png ; pdf	Figure 4-b: Comparison of the $\Delta \eta$ between the two tag jets distributions between data and MC for the muon (a) and electron (b) channel.
png ; pdf	Figure 5-a: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .
png ; pdf	Figure 5-b: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .
png ; pdf	Figure 5-c: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .
png ; pdf	Figure 5-d: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .
png ; pdf	Figure 5-e: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .
png ; pdf	Figure 5-f: (a,d) Distribution of the $m_{\mathrm{jj}}$ for muon (a,b,c) and electron (d,e,f) channel. (b,e) The $m_{jj}$ after subtraction of all components except the EWK W+2 jets process. The error bars represent the statistical uncertainties. (a,d) The distribution of $(\text {data} - \text {fit})/(\text {uncertainty})$ .

Compact Muon Solenoid
LHC, CERN