Forward-backward asymmetry and differential cross section of top quark in flavor violating $Z'$ model at $\mathscr{O}(α_s^2 α_X)$

Details Forward-backward asymmetry and differential cross section of top quark in flavor violating $Z'$ model at $\mathscr{O}(α_s^2 α_X)$ Forward-backward asymmetry and differential cross section of top quark in flavor violating $Z'$ model at $\mathscr{O}(α_s^2 α_X)$

2010-06-13

arxiv.org/abs/1006.2510v3

Phys.Rev.D82:034026,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 8 figures, 2 tables, published version

Scientific paper

10.1103/PhysRevD.82.034026

In this paper, forward-backward asymmetry and differential cross section of top quark in flavor violating $Z'$ model up to $\mathscr{O}(\alpha_s^2 \alpha_X)$ at Tevatron are calculated. In order to account for the top observed large forward-backward asymmetry, the new coupling $g_X$ among $Z'$ and quarks will be not much less than strong coupling constant $g_s$. After including the new higher order correction, the differential cross section can fit the data better than those only including the leading contributions from $Z'$, while the forward-backward asymmetry is still in agreement with the measurement.

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