منابع مشابه
Spin-Spin Correlations of Top Quark Pairs at Hadron Colliders
Top quark pairs are produced with strongly correlated spins in the partonic reactions qq̄ → tt̄ and gg → tt̄. A complete description of these effects in terms of the spin density matrix of the tt̄ system in leading order QCD is given. We further discuss the prospects to observe the spin-spin correlations at pp̄ and pp colliders by measuring suitable angular correlations among the t and t̄ decay produ...
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We report on our results about hadronic tt̄ production at NLO QCD including t, t̄ spin effects, especially on tt̄ spin correlations.
متن کاملQcd Corrections to Top Quark Spin Correlations at Hadron Colliders *
Future hadron collider experiments will allow for a detailed investigation of t ¯ t spin correlation effects. In this talk, recent progress in the theoretical description of these effects is reported. In particular, next-to-leading order results for the t ¯ t spin correlations in q ¯ q → t ¯ tX are presented, using various spin quantization axes. Top quark pair production and decay can be descr...
متن کاملCharged Higgs effects on top spin correlations
Discovery of a charged Higgs requires that its spin and couplings are determined. We analyze how charged Higgs effects on spin correlations in top quark pair production can be used for determination of the helicity structure of the yukawa couplings. For a general Two Higgs Doublet Model, we determine spin analyzing coefficients for top decays involving charged Higgs and study in detail the effe...
متن کاملNew Method for Reconstructing Effective Top Quark Spin
We propose a new method for reconstructing an effective spin direction of a semi-leptonically decayed top quark. The method is simple: for instance, it does not require the spin information of the antitop quark in a tt̄ event. The reconstructed effective spin is expected to be useful in hadron collider experiments. We demonstrate its usefulness in an analysis of the top decay vertex. After ten y...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2013
ISSN: 1029-8479
DOI: 10.1007/jhep03(2013)117