Chong Chen

QCD NLO and EW NLO corrections to tt¯H production with top quark decays at hadron collider

Higgs boson production associated with a top quark pair is an important process in studying the nature of the newly discovered Higgs boson at the LHC. In this letter, we report on our calculations including the next-to-leading order (NLO) QCD and NLO electroweak corrections to the pp → tt̄H process in the standard model. We present the integrated cross sections at the 14 TeV LHC and even at the future proton-proton colliders with √ s = 33 and 100 TeV. Our calculation includes the top quark subsequent decays by adopting the narrow width approximation. The kinematic distributions of Higgs boson and top quark decay products at the LHC are provided. We find that the O(α2sα2ew) corrections are quantitatively comparable with the O(α3sαew) corrections in some kinematic region.

Electroweak radiative corrections to W^+W^-\gamma production at the ILC

We provide and discuss the precision predictions for the WWγ production at the ILC including the full electroweak (EW) one-loop corrections and high order initial state radiation (ISR) contributions in the Standard Model. The dependence of the leading order (LO) and EW corrected cross sections on the colliding energy is investigated. We find that the EW correction suppresses the LO cross section significantly, and the ISR effect beyond O(α) is important near the threshold, but is negligible in the high energy region. We provide the LO and EW corrected distributions of the transverse momenta and rapidities of final W−-boson and photon as well as the W -pair invariant mass. From the various kinematic distributions, we find that EW correction strongly depends on the final state phase space. We investigate the leptonic decays of the final W-boson pair by adopting the narrow width approximation (NWA), and find that the final produced photon and leptons can be well separated from each other. PACS: 12.15.Lk, 12.38.Bx, 14.70.Fm, 14.70.Bh

Double Higgs boson production and decay in Randall-Sundrum model at hadron colliders

We investigate the double Higgs production and decay at the 14 TeV LHC and 33 TeV HE-LHC in both the standard model and Randall-Sundrum (RS) model. In our calculation we consider reasonably only the contribution of the lightest two Kaluza-Klein (KK) gravitons. We present the integrated cross sections and some kinematic distributions in both models. Our results show that the RS effect in the vicinities of MHH ∼ M1, M2 (the masses of the lightest two KK gravitons) or in the central Higgs rapidity region is quite significant, and can be extracted from the heavy SM background by imposing proper kinematic cuts on final particles. We also study the dependence of the cross section on the RS model parameters, the first KK graviton mass M1 and the effective coupling c0, and find that the RS effect is reduced obviously with the increment of M1 or decrement of c0. PACS: 11.10.Kk, 14.80.Cp, 12.38.Bx

Precision study of \(ZZ\gamma \) production including Z-boson leptonic decays at the ILC

We report on the precision predictions for the

Searching for \tau \rightarrow \mu \gamma lepton-flavor-violating decay at super Charm-Tau factory

e^+e^-to ZZgamma

Possible effects of the large extra dimensions on ZZW production at the LHC

process including