Forward-backward asymmetry ofB→(π,K)l+l−:Supersymmetry at work

The forward-backward asymmetry at NNLO revisited

I reconsider the forward-backward asymmetry for flavoured quarks in electron-positron annihilation. I suggest an infrared-safe definition of this observable, such that the asymmetry may be computed in perturbative QCD with massless quarks. With this definition, the first and second order QCD corrections are computed.

The Forward–Backward Asymmetry of B → (π,K)l+l−: Supersymmetry at Work

We analyze the forward–backward asymmetry of the decays B → (π,K)ll with l = μ, or τ in the framework of the constrained minimal supersymmetric standard model. We find that, the asymmetry is enhanced at large tanβ and depends strongly on the sign of the μ parameter. For μ > 0, the asymmetry is typically large and observable whereas for μ < 0, it changes the sign and is suppressed by an order of...

tt̄ CROSS-SECTION AND FORWARD-BACKWARD ASYMMETRY AT CLIC

A top-quark reconstruction method at Clic is described. The reconstructed events are used to measure the ee → tt̄ cross-section as well as the forwardbackward asymmetry. The results suggest that the measurement accuracy for the cross-section will be δσ σ = 1.4 % and for the asymmetry δAF B AF B = 4.2 % for 1 ab.

The Top Quark Forward-backward Asymmetry at Approximate N3LO

I calculate the top quark forward-backward asymmetry at the Tevatron in both the laboratory frame and the tt̄ rest frame. I show that soft-gluon corrections are the dominant contribution to the asymmetry and closely approximate exact results through next-tonext-to-leading order (NNLO). I present a calculation of the asymmetry including approximate next-to-next-to-next-to-leading-order (N3LO) sof...

Forward - backward and isospin asymmetry for B →