Probing the anomalous FCNC top-Higgs Yukawa couplings at the Large Hadron Electron Collider
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论文类型：期刊论文
发表时间：2015-10-12
发表刊物：PHYSICAL REVIEW D
收录刊物：SCIE、Scopus
卷号：92
期号：7
ISSN号：1550-7998
摘要：In this paper, we study the anomalous flavor changing neutral current Yukawa interactions between the top quark, the Higgs boson, and either an up or charm quark (tqH; q = u, c). We probe these couplings in e(-) p -> nu(e)(t) over bar -> nu H-e (q) over bar and the channel e(-) p -> nu(e)Hb. Both channels are induced by charged current interactions through e(-) p collision at the Large Hadron Electron Collider (LHeC). We study the signatures with the Higgs decay modes H -> gamma gamma, b (b) over bar and tau(+)tau(-). Our results show that the flavor changing couplings kappa(tqH) can be probed down to a value of 0.0162 in e(-) p -> nu(epsilon)(t) over bar -> nu H-e (q) over bar with H -> b (b) over bar at a 14 TeV LHeC with a 150 GeV electron beam and 200 fb(-1) luminosity. This value of the coupling corresponds to the branching ratio Br(t -> qH) = 1.34 x 10(-4).
发表时间：2015-10-12