Real emission corrections to Higgs production via gluon fusion, at order αs, lead to a Higgs plus two-jet final state. We present the calculation of these scattering amplitudes, as induced by top-quark triangle-, boxand pentagon-loop diagrams. These diagrams are evaluated analytically for arbitrary top mass mt. We study the renormalization and factorization scale-dependence of the resulting H +...

The prospects for the discovery of neutral Higgs bosons (φ = H, h, A) produced with bottom quarks via Higgs decays into muon pairs (pp → bb̄φ → bb̄μμ̄+X) at the CERN LHC are investigated in the minimal supersymmetric model. The complete physics background from the production of bb̄μμ̄, bb̄WW (including tt̄) and jjμμ̄, j = g, u, d, s, c in the Standard Model is calculated with realistic acceptance cuts....

We present results for the Z-boson and W -boson transverse momentum (pT ) distributions for large pT at LHC and Tevatron energies. We calculate complete next-to-leadingorder (NLO) QCD corrections as well as soft-gluon corrections at next-to-next-to-leadingorder (NNLO) to the differential cross section. The NNLO soft-gluon contributions are derived from next-to-next-to-leading-logarithm (NNLL) r...

A gauge model with chiral color symmetry is considered and possible effects of the color G-boson octet predicted by this symmetry are investigated in dependence on two free parameters, the mixing angle θG and G ′ mass mG′ . The allowed region in the mG′ − θG plane is found from the Tevatron data on the cross section σtt̄ and forward-backward asymmetry A pp̄ FB of the tt̄ production. The mass limit...

We study the application of the joint resummation formalism to Higgs production via gluongluon fusion at the LHC, defining inverse transforms by analytic continuation. We work at next-to-leading logarithmic accuracy. We find that at low QT the resummed Higgs QT distributions are comparable in the joint and pure-QT formalisms, with relatively small influence from threshold enhancement in this ra...

I present a unified calculation of soft-gluon corrections to hard-scattering cross sections through next-to-next-to-next-to-leading order (NNNLO). Master formulas are derived, from a threshold resummation formalism, that can be applied to total and differential cross sections for hard-scattering processes in hadron colliders. I also present numerical results for charged Higgs production at the ...

We discuss Wγ production in polarized p p collisions at RHIC energy. We point out that the RHIC collider has two advantages over other hadron colliders to measure the characteristic feature of Wγ production: (1) the RHIC energy is not so high and (2) the polarized beams are available. We calculate the tree level cross section for Wγ production using a generic spin basis for W and discuss both t...

Events containing W or Z bosons with accompanying jets are important channels to test the Standard Model. These proceedings discuss W/Z+Jets production cross section measurements and their use to understand the detectors and their performances after the LHC start-up. At the same time, these processes are a major source of background to new physics searches, such as SUSY. Methods, mostly data-dr...

In this paper, we systematically study the contribution of the TC2 model to the single t-quark production at the LHC. The TC2 model can contribute to the cross section of the single t-quark production in two different ways. First, the existence of the top-pions and top-higgs can modify the Wtb coupling via their loop contribution, and such modification can cause the correction to the cross sect...

The advantage and feasibility of using W -boson production to extract unique information on the flavor asymmetry of the ū and d̄ sea-quark distributions in the proton are examined. The W and W production cross section ratios in p + p collisions are shown to be sensitive to the d̄/ū ratios, and they are free from charge-symmetry-breaking and nuclear-binding effects. The feasibility for measuring t...