14 research outputs found
Soliton pair creation in classical wave scattering
We study classical production of soliton-antisoliton pairs from colliding
wave packets in (1+1)-dimensional scalar field model. Wave packets represent
multiparticle states in quantum theory; we characterize them by energy E and
particle number N. Sampling stochastically over the forms of wave packets, we
find the entire region in (E,N) plane which corresponds to classical creation
of soliton pairs. Particle number is parametrically large within this region
meaning that the probability of soliton-antisoliton pair production in
few-particle collisions is exponentially suppressed.Comment: 16 pages, 8 figures, journal version; misprint correcte
Constraining holographic technicolor
We obtain a new bound on the value of Peskin-Takeuchi S parameter in a wide
class of bottom-up holographic models for technicolor. Namely, we show that
weakly coupled holographic description in these models implies S>>0.2. Our
bound is in conflict with the results of electroweak precision measurements, so
it strongly disfavors the models we consider.Comment: 8 pages; journal versio