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arxiv: 1004.3404 · v3 · pith:GQXYTFTWnew · submitted 2010-04-20 · ✦ hep-ph

Charge asymmetry in W + jets production at the LHC

classification ✦ hep-ph
keywords jetsasymmetrychargecontributionsphysicsproductionratiosigma
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The charge asymmetry in W + jets production at the LHC can serve to calibrate the presence of New Physics contributions. We study the ratio {\sigma}(W^+ + n jets)/{\sigma}(W^- + n jets) in the Standard Model for n <= 4, paying particular attention to the uncertainty in the prediction from higher-order perturbative corrections and uncertainties in parton distribution functions. We show that these uncertainties are generally of order a few percent, making the experimental measurement of the charge asymmetry ratio a particularly useful diagnostic tool for New Physics contributions.

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