July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Measuring the $t\bar{t}$ Forward-Backward Asymmetry using semi-leptonic final states at 8 TeV with the CMS detector

Jul 31, 2017, 6:32 PM
1m
Reception Area (Fermi National Accelerator Laboratory)

Reception Area

Fermi National Accelerator Laboratory

Poster Top Quark Physics Poster Session and Reception

Speaker

lei feng (Johns Hopkins University)

Description

We presents a measurement of Forward-Backward Asymmetry($\displaystyle{A_{FB}}$) in $t\bar{t}$ production. The data sample corresponds to $19.7\,\textrm{fb}^{-1}$ of integrated luminosity in proton-proton collisions at $\sqrt{s} = 8\,\textrm{TeV}$ collected by the CMS experiment at the LHC. Events selected contain a single isolated muon or electron, with four or five jets of which two are b-tagged. A template technique is used to extract the asymmetry from the top quark kinematic distributions. This technique is based upon an extension of the tree-level cross section for $q\bar{q}$ initial states that sensitively isolates $q\bar{q}$ from $gg/qg$ initial states. The measured $A_{FB}$ and relative aboundance of $q\bar{q}$ initiated $t\bar{t}$ will be reported and compared to both theoretical calculation and results from D0 and CDF experiments of Tevatron.

Primary author

lei feng (Johns Hopkins University)

Co-authors

Morris Swartz (Johns Hopkins University) Nick Eminizer (Johns Hopkins University)

Presentation materials

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