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31 papers · 2 filters
QCD Interconnection Studies at Linear Colliders
Valery A. Khoze, Torbjörn Sjöstrand
Heavy objects like the W, Z and t are short-lived compared with typical hadronization times. When pairs of such particles are produced, the subsequent hadronic decay systems may th…
Low Energy Constants from Kl4 Form-Factors
G. Amorós, J. Bijnens, P. Talavera
We have calculated the form-factors F and G in K ---> pi pi e nu decays (Kl4) to two-loop order in Chiral Perturbation Theory (ChPT). Combining this together with earlier two-loop…
Color separate singlets in annihilation
Qun Wang, Gosta Gustafson, Qu-bing Xie
We use the method of color effective Hamiltonian to study the properties of states in which a gluonic subsystem forms a color singlet, and we will study the possibility that such a…
Scheme Dependence of Weak Matrix Elements in the Expansion
Johan Bijnens, Joaquim Prades
We show how the scheme- and scale-dependence of the short-distance operator product expansion with four-quark operators can be correctly accounted for in the framework of the $1/N_…
gamma-gamma Physics at Linear Colliders
Christer Friberg
A high-energy lepton-lepton collider will give us a unique possibility to study e-gamma and gamma-gamma interactions at high energies. The high-energy photons can be generated by C…
Models of Low Energy Effective Theory applied to Kaon Non-leptonic Decays and Other Matrix Elements
Johan Bijnens
In this talk I describe work on computing non-leptonic matrix elements consistently with both long and short distance contributions included. On the simpler example of the -$π…