Proposal for ATGC limit

1. Proposal for ATGC limit Zhijun Liang

2. Fiducial cross section Inclusive phase space Low pt zero jet phase space - Pt(lep1)>25 GeV - |eta(lep)| < 2.47 - MET > 25 GeV - MT > 40 GeV - Et(pho) > 15 GeV - dR(pho,lep)>0.7 - |eta(pho)| < 2.37 - Njet==0 - Pt(lep)>25 GeV - |eta(lep)| < 2.47 - MET > 25 GeV - MT > 40 GeV - Et(pho) > 15 GeV - dR(pho,lep)>0.7 - |eta(pho)| < 2.37 High pT inclusive phase space - Pt(lep1)>25 GeV - |eta(lep)| < 2.47 - MET > 25 GeV - MT > 40 GeV - Et(pho) > 45 GeV - dR(pho,lep)>0.7 - |eta(pho)| < 2.37

3. pT(g)>15GeVInclusive phase space Number of extracted signal : 1334 Measured Fiducial cross section : 4.2 +-0.3 pb

4. pT(g)>15GeVonly zero jet event Number of extracted signal : 815 Measured Fiducial cross section : 2.5 +-0.2 pb

5. pT(g)>45GeVInclusive phase space Number of extracted signal : 237 Measured Fiducial cross section : 0.53 +-0.03 pb

6. ATGC limit based on fiducial cross section http://cdsweb.cern.ch/record/1375854/files/ATL-COM-PHYS-2011-1108.pdf

7. Proposal to use fiducial cross section • Just to use one bin(fiducial cross section) instead of based on photon pT . • WW group have not converged on how to estimate signal shape uncertainty , maybe it is better to extract ATGC limit by using fiducial cross section for now. • Make use of High pT inclusive phase space to extract ATGC limit.

8. Expected Wgamma cross sectionwith different ATGC parameter (Baur NLO) Expected Wgamma cross section VS ATGC parameter (pb) Expected Wgamma cross section VS ATGC parameter (pb) Expected Wgamma cross section VS ATGC parameter (pb)

9. λ dependence High pT inclusive phase space - Pt(lep1)>25 GeV - |eta(lep)| < 2.47 - MET > 25 GeV - MT > 40 GeV - Et(pho) > 45 GeV - dR(pho,lep)>0.7 - |eta(pho)| < 2.37 Predicted cross section(pb) λ

10. ATGC limit P(measured cross section| λ) 95% CL λ

11. Δκ dependence

12. ATGC limit for Δκ