We review several most recent prompt-photon measurements at HERA and the Tevatron and discuss their implication for future measurements at the LHC. A comparison to Monte Carlo models, as well as to NLO QCD predictions based on the standard DGLAP and the kT -factorization approaches is discussed. Effects from renormalization and factorization scale uncertainties, as well as uncertainties on the ...

In this work, we calculate the branching ratios and CP asymmetries of the decays of B → ππ and πK with the frame of QCD factorization in the heavy quark limit. We also compare the results with the estimates by using generalized factorization and experimental measurements. PACS numbers 13.25.Hw 12.38.Bx Supported in part by National Natural Science Foundation of China and State Commission of Sci...

We consider charmonium polarization at high-energy hadron collider Tevatron in the framework of the nonrelativistic QCD (NRQCD) and the kT -factorization approach. The polarization effects are studied for the direct and the prompt production channels. The obtained predictions can be used for test of the Regge limit of QCD and for test of the NRQCD formalism. High-energy factorization In the phe...

A brief review of checking the factorization hypothesis for matrix element of B 0 − ¯ B 0 mixing within operator product expansion and QCD sum rules is given. Both perturbative and power corrections are considered.

We address a number of theoretical and phenomenological issues in two-body charmless non-leptonic B decays in the context of a factorization model. A classification of the exclusive decays involving tree and penguin amplitudes is reviewed. The role of QCD anomaly in exclusive decays involving an η or η ′ is elucidated and comparison is made with the existing data. We argue that the factorizatio...

We investigate the hadronic description of the B 0 d → π + π − decay, with the aim to test the validity of quark-hadron duality, the factorization limit and the magnitude of the strong phases. We discuss the derivation of the dispersion relations in the Lehmann-Symanzik-Zimmermann formalism, the Goldberger-Treiman method to include inelastic effects in the spectral function and the consistency ...

I review the main results leading to Factorization of QCD amplitudes in momentum space and, view analogue coordinate space, one-loop jet function is computed and Landau's equations for Abelian radiative corrections it are studied. Furthermore, two these reduced quadrature.

We present in detail the calculation of the O(α 3 s) inclusive total cross section for the process pp → tth in the Standard Model, at the Tevatron center-of-mass energy √ s H = 2 TeV. The next-to-leading order QCD corrections significantly reduce the renormalization and factorization scale dependence of the Born cross section. They slightly decrease or increase the Born cross section depending ...

We present a simple way of separating the overlap between the soft and collinear factorization formulae of QCD squared matrix elements. We check its validity explicitly for single and double unresolved emissions of tree-level processes. The new method makes possible the definition of helicity-dependent subtraction terms for regularizing the real contributions in computing radiative corrections ...

I review important aspects of the perturbative QCD approach to exclusive B meson decays, concentrating on factorization theorem , gauge invariance, end-point singularities, k T and threshold resummations, power counting, penguin enhancement, and CP asymmetries.