Production of Charged -Meson by -Ray: Higher Order Corrections

Charged Higgs Production: Higher-Order Corrections

I present a calculation of higher-order radiative corrections to charged Higgs production in association with a top quark via the process bg → tH −. Results for charged Higgs production at the LHC are presented, including the dependence of the cross section on the charged Higgs mass, the top quark mass, the factorization and renormalization scales, and tan β. I show that the theoretical predict...

Higher Order Corrections to H± Production

Next-to-leading order corrections in exclusive meson production

We analyze in detail the size of next-to-leading order corrections to hard exclusive meson production within the collinear factorization approach. Corrections to the cross section are found to be huge at small xB and substantial in typical fixed-target kinematics. With the models we take for nucleon helicity-flip distributions, the transverse target polarization asymmetry in vector meson produc...

Diiractive Charged Meson Pair Production

We investigate the possibility to measure the nonforward gluon distribution function by means of diiractively produced + ? and K + K ? pairs in polarized lepton nucleon scattering. The resulting cross sections are sizable and are dominated by the gluonic contribution. We nd large spin asymmetries, both for + ? and for K + K ? pairs.

Higher-order QCD corrections in prompt photon production

We exhibit a method for simultaneously treating recoil and threshold corrections in single-photon inclusive cross sections, working within the formalism of collinear factorization. This approach conserves both the energy and transverse momentum of resummed radiation. At moderate p(T), we find the potential for substantial enhancements from higher-order perturbative and power-law nonperturbative...