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4 papers · 2 filters
How to define physical properties of unstable particles
J. Gegelia, S. Scherer
In the framework of effective quantum field theory we address the definition of physical quantities characterizing unstable particles. With the aid of a one-loop calculation, we st…
Matching NLO parton shower matrix element with exact phase space: case of W -> l nu (gamma) and gamma^* -> pi^+pi^-(gamma)
G. Nanava, Qingjun Xu, Z. Was
The PHOTOS Monte Carlo is often used for simulation of QED effects in decay of intermediate particles and resonances. Momenta are generated in such a way that samples of events cov…
Mass and width of the Roper resonance using complex-mass renormalization
D. Djukanovic, J. Gegelia, S. Scherer
The pole mass and the width of the Roper resonance are calculated as functions of the pion mass in the framework of low-energy effective field theory of the strong interactions. We…
Complex-mass renormalization in chiral effective field theory
D. Djukanovic, J. Gegelia, A. Keller +1
We consider a low-energy effective field theory of vector mesons and Goldstone bosons using the complex-mass renormalization. As an application we calculate the mass and the width…