We investigate the possibility that an imaginary anomalous tbW coupling can be measured in the process e−p→νet‾X by means of T-odd observables. One such observable considered here is the polarization of the top antiquark transverse to the production plane. The other is a T-odd correlation constructed out of observable momenta when the top quark decays leptonically. Both these T-odd observables are shown to be proportional to the imaginary part of only one of the tbW anomalous couplings, the other couplings giving either vanishing or negligible contribution. This imaginary part could signal either a CP-odd coupling, or an absorptive part in the effective coupling, or both. We estimate the 1-σ limits that might be derived in the case of each of these observables for a collider with a proton energy of 7 TeV and an electron energy of 60 GeV and also in the case of a higher electron energy of 150 GeV.

中文翻译：

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来自 ep 对撞机单顶生产中异常 tbW 耦合的 T-odd 可观察物


我们研究了在 e-p→νet ̅X 过程中可以通过 T 奇数可观察物测量假想异常 tbW 耦合的可能性。这里考虑的一个这样可观察对象是顶部反夸克横向到生产平面的极化。另一种是顶夸克以轻子方式衰变时由可观测动量构建的 T 奇相关。这两个 T 奇数可观察对象都被证明与只有一个 tbW 异常耦合的虚部成正比，其他耦合给出的贡献要么消失，要么可以忽略不计。这个虚部可能表示 CP 奇数耦合，或有效耦合中的吸收部分，或两者兼而有之。我们估计了对于质子能量为 7 TeV、电子能量为 60 GeV 的对撞机以及电子能量为 150 GeV 的对撞机，在每种可观察对象的情况下可能得出的 1-σ 极限。