Transparent Spin Method for Spin Control of Hadron Beams in Colliders
نویسندگان
چکیده
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 propose techniques to observe the correlation of the spins of top quarks and antiquarks at the Tevatron and the LHC. Observation of the spin correlation would confirm that the top quark decays before its spin flips, and would place a lower bound on the top-quark width and Vtb. The spin correlation may also be a useful tool to study the weak decay amplitude of the top quark.
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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.
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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...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2020
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.124.194801