Constraining Anomalous Top Quark Couplings at the Tevatron

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Abstract

We explore the influence of an anomalous chromomagnetic moment, \(\kappa\), onthe production characteristics of top quark pairs at the Tevatron. We find that for top quarks in the 170 GeV mass range, present searches are probing values of \(\kappa\) of order \({1 \over 3}\). For \(\kappa\)'s in this range we find that significant enhancements in the both the \(q \bar q,~gg \to t \bar t\) production cross sections are obtained. Once top has been verified and QCD uncertainties are under control, future high statistics measurements at the Tevatron will eventually be sensitive to values of \(\kappa\) with magnitudes smaller than 0.10-0.15. We discuss a class of scalar technicolor models which may produce large values of \(\kappa\) in conjunction with generation of \(m_t\).

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Most cited references 27

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Using the top quark for testing standard-model polarization andCPpredictions

G. L. Kane, G. A. Ladinsky, C. Yuan (1992)

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Parton Distributions of the Proton

, , (2010)

To obtain improved parton densities of the proton, we present a new global analysis of deep inelastic and related data including, in particular, the recent measurements of \(F_2\) at HERA, of the asymmetry of the rapidity distributions of \(W^\pm\) production at the FNAL \(pp\) collider and of the asymmetry in Drell-Yan production in \(pp\) and \(pn\) collisions. We also incorporate data to determine the flavour dependence of the quark sea distributions. We find that the behaviour of the partons at small \(x\) is consistent with the precocious onset of BFKL leading \(\log(1/x)\) dynamics. We discuss the ambiguities remaining in the gluon distribution. We present improved predictions for \(W\) boson (and \(t\) quark) production at the FNAL \(\pp\) collider.

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Observation of Top Quark Production in Pbar-P Collisions

the CDF Collaboration, David Toback, José Benlloch Baviera … (1995)

We establish the existence of the top quark using a 67 pb^-1 data sample of Pbar-P collisions at Sqrt(s) = 1.8 TeV collected with the Collider Detector at Fermilab (CDF). Employing techniques similar to those we previously published, we observe a signal consistent with t-tbar decay to WW b-bbar, but inconsistent with the background prediction by 4.8 sigma. Additional evidence for the top quark is provided by a peak in the reconstructed mass distribution. We measure the top quark mass to be 176 +/-8(stat) +/- 10(sys.) GeV/c^2, and the t-tbar production cross section to be 6.8 +3.6 -2.4 pb.