Measurement of the Forward-Backward Asymmetry in $$\gamma/Z$$ boson to Dilepton Events in Compact Muon Solenoid at a Center-of-mass Energy of 7 TeV
- Texas Tech Univ., Lubbock, TX (United States)
The forward-backward asymmetry parameter ($$A_{\rm FB}$$) as a function of dilepton invariant mass in $$Z / \gamma^* \rightarrow l^+l^-$$ ($$l$$=$$e$$ or $$\mu$$) at $$\sqrt{s}$$=7 TeV is measured using 2.2 fb$$^{-1}$$ of $pp$ collision data in 2011. The uncorrected (raw) $$A_{\rm FB}$$ and the corrected (unfolded) $$A_{\rm FB}$$ is performed in a wide mass range between 40 GeV/$$c^{2}$$ to 1000 GeV/$$c^{2}$$, and comparative studies and correction techniques with simulation are described in detail. We measure raw $$A_{\rm FB}$$ for the first time in a large rapidity range of 3 $$<|\eta| <$$ 5 with electrons using the forward calorimeters and achieve almost non-diluted $$A_{\rm FB}$$ result. The $$A_{\rm FB}$$ measurements with muons and electrons and their combination are consistent with the Standard Model (SM) prediction within uncertainties.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1248351
- Report Number(s):
- FERMILAB-THESIS-2011-47; CERN-THESIS-2011-266; 1090893
- Country of Publication:
- United States
- Language:
- English
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