Hua-Yong Han

Scalar explanation of diphoton excess at LHC

Abstract Inspired by the diphoton signal excess observed in the latest data of 13 TeV LHC, we consider either a 750 GeV real scalar or pseudo-scalar responsible for this anomaly. We propose a concrete vector-like quark model, in which the vector-like fermion pairs directly couple to this scalar via Yukawa interaction. For this setting the scalar is mainly produced via gluon fusion, then decays at the one-loop level to SM diboson channels g g , γ γ , Z Z , W W . We show that for the vector-like fermion pairs with exotic electric charges, such model can account for the diphoton excess and is consistent with the data of 8 TeV LHC simultaneously in the context of perturbative analysis.

Collider Signatures of Higgs-portal Scalar Dark Matter

Abstract In the simplest Higgs-portal scalar dark matter model, the dark matter mass has been restricted to be either near the resonant mass ( m h / 2 ) or in a large-mass region by the direct detection at LHC Run 1 and LUX. While the large-mass region below roughly 3 TeV can be probed by the future Xenon1T experiment, most of the resonant mass region is beyond the scope of Xenon1T. In this paper, we study the direct detection of such scalar dark matter in the narrow resonant mass region at the 14 TeV LHC and the future 100 TeV hadron collider. We show the luminosities required for the 2 σ exclusion and 5 σ discovery.

Hadronic production of

In the paper, we present a detailed discussion on the

\Xi_{cc}

\Xi_{cc}

at a fixed-target experiment at the LHC

production at a fixed target experiment at the LHC (After@LHC). The doubly charmed baryon

Higgs-portal Scalar Dark Matter: Scattering Cross Section and Observable Limits

\Xi_{cc}

QCD improved electroweak parameter ρ

is produced via the channel,

B → ρ transition form factors and the ρ-meson transverse leading-twist distribution amplitude

{\rm Proton} + {\rm Proton}\to\Xi_{cc}+X

|Vcb| from the semileptonic decay B→Dℓν¯ℓ and the properties of the D-meson distribution amplitude

. In estimating its hadroproduction, we discuss three dominant subprocesses, e.g.

Twist-3 light-cone distribution amplitudes of the scalar mesons within the QCD sum rules and their application to the \(B \rightarrow S\) transition form factors

g+g\to \Xi_{cc} +\bar{c} +\bar{c}