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21 papers · 1 filter
Nonlinear Band Gap Transmission in Optical Waveguide Arrays
Ramaz Khomeriki
The effect of nonlinear transmission in coupled optical waveguide arrays is theoretically investigated via numerical simulations on the corresponding model equations. The realistic…
Precise Measurement of the Pion Axial Form Factor in the Pi+ -> e+ nu gamma Decay
E. Frlez, D. Pocanic, V. A. Baranov +23
We have studied radiative pion decays Pi+ -> e+ nu gamma in three broad kinematic regions using the PIBETA detector and a stopped pion beam. Based on Dalitz distributions of 42,209…
Design, Commissioning and Performance of the PIBETA Detector at PSI
E. Frlez, D. Pocanic, K. A. Assamagan +41
We describe the design, construction and performance of the PIBETA detector built for the precise measurement of the branching ratio of pion beta decay, pi+ -> pi0 e+ nu, at the Pa…
Precise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio
D. Pocanic, E. Frlez, V. A. Baranov +25
Using a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare Pi+ -> Pi0 e+ Nu,(pi_beta) decay branching ratio. We have evaluated the…
Particle production by the expanding thin-walled bubble
Michael Maziashvili
Neglecting the effect of particle production at the moment of bubble nucleation, the spectrum of created particles during the bubble expansion is evaluated in the thin-wall approxi…
Particle production by the thick-walled bubble
Michael Maziashvili
The spectrum of created particles during the tunneling process, leading to the decay of a false vacuum state, is studied numerically in the thick-wall approximation. It is shown th…