Study of the FCNH Coupling with Boosted Higgs at LHC*

Abstract

We present a study about the flavor changing coupling of the top quark with the Higgs boson through the channel pp → Ht / t ¯ with H → b b ¯ at LHC. The final states considered for the such process are l ± + E T + 3 b . We focus on the boosted region in the phase space of the Higgs boson. The backgrounds and events are simulated and analyzed. The sensitivities for the FCNH couplings are estimated. It is found that it is more sensitive for y tu than y tq at LHC. The upper limits of the FCNH couplings can be set at LHC with 3000 fb − 1 integrated luminosity as | y tu | 2 = 1.1 × 10 − 3 and | y tc | 2 = 7.2 × 10 − 3 at 95% C.L.

Study of the $tH$ production at 14TeV and 100TeV $pp$ colliders

“…We can see that this channel at LHC is not as good as the H → b b channel studied in Ref. [12]. Since then we combine all the three channels of H → b b, W W * and ZZ * and obtain the upper limits on LHC for L = 3000/f b as,…”

“…In Ref. [12] this process was analyzed with H → b b channel, and it was found that the angular of the final states could be used to separate the boosted Higgs signal from the main background. Since the isolated high p t electrons and muons are typically clean and easy detected on colliders, we focus on the h → V V * (V = W, Z) channels to study the tH associated production at hadron colliders and try to examine whether such channels are prossiming channels for measurement of the anomalous Yukawa couplings at pp colliders.…”