منابع مشابه
Analytic coupling and Sudakov effects in exclusive processes : pion and γ ∗ γ → π 0 form factors
We develop and discuss in technical detail an infrared-finite factorization and optimized renormalization scheme for calculating exclusive processes, which enables the inclusion of transverse degrees of freedom without entailing suppression of calculated observables, like form factors. This is achieved by employing an analytic, i.e., infrared stable, running strong coupling αs(Q) which removes ...
متن کاملProof of factorization for electroproduction of multiple mesons and exclusive γ∗γ production of multiple hadrons
In the following, we will present a generalization of the proof of factorization for electroproduction of vector mesons to the production of several mesons such as π+π− and a proof of factorization for exclusive γγ production of several hadrons for example pp̄ or π+π− to all orders in perturbation theory up to power suppressed terms. PACS: 12.38.Bx, 13.85.Fb, 13.85.Ni
متن کاملExclusive W + + γ production in proton - antiproton collisions II : results
We present results for total cross sections, single and double differential distributions and correlations between pairs of outgoing particles in the reactions p + ¯ p → W + + γ and p + ¯ p → W + + γ + jet at √ S = 1.8 TeV. Order α S QCD corrections and leading logarithm photon bremsstrahlung contributions are included in the MS mass factorization scheme for three experimental scenarios: 1) 2-b...
متن کاملHard Exclusive Baryon-antibaryon Production in 2-γ Collisions
We present a perturbative calculation of baryon pair production in two-photon collisions, γγ → BB̄, in which baryons are treated as quark-diquark systems. Our approach accounts for constituent mass effects in a systematic way. Taking the diquark-model parameters from foregoing studies of other electronand photon-induced baryonic reactions, our results agree well with the most recent large moment...
متن کاملExclusive B → K ∗ ∗ γ Decays in the QCD LCSR
We predict contributions of higher K-resonances to the radiative rare decays b → sγ, in the framework of the QCD sum rules on the light cone (LCSR). Our calculations are restricted to the leading twist-two operators for K * (892) and to the asymptotic wave function for the other K * *-mesons. Using experimental data on the semileptonic τ → K * * ν τ decays, we extract the corresponding decay co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2010
ISSN: 1674-1137
DOI: 10.1088/1674-1137/34/6/034