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About the validity of complex mass scheme for the Δ resonance and higher energy region approaches
(IOP Publishing, 2015-09)
It is a well known fact that when a resonance (R) is produced and decays, its unperturbed propagator will be singular at p2 mR = 2 when it appears in an s-type Feynman pole graph. Nevertheless this is not a problem, since ...
Resonances for hamiltonians with a delta perturbation in one dimension
(INT SCIENCE SERVICES/BALABAN PUBLISHERS, 2005)
Resonances for hamiltonians with a delta perturbation in one dimension
(INT SCIENCE SERVICES/BALABAN PUBLISHERS, 2005)
Resonances for hamiltonians with a delta perturbation in one dimension
(INT SCIENCE SERVICES/BALABAN PUBLISHERS, 2005)
Transition form factors: gamma* plus p -> Delta(1232), Delta(1600)
(Amer Physical Soc, 2019-08-05)
Electroproduction form factors describing the gamma* p -> Delta(+)(1232), Delta(+)(1600) transitions are computed using a fully dynamical diquark-quark approximation to the Poincare-covariant three-body bound-state problem ...
Absorptive one-loop corrections and the complex-mass prescription for the Δ resonance propagator
(IOP Publishing, 2012-07)
It is shown that the absorptive one-loop self-energy corrections to the δ ++ propagator can reproduce the complex-mass prescription for its resonant form. The effects of absorptive corrections beyond the ones considered ...
Semilinear elliptic problems near resonance with a nonprincipal eigenvalue
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008)
We consider the Dirichlet problem for the equation -Delta u = lambda u +/- (x, u) + h(x) in a bounded domain, where f has a sublinear growth and h is an element of L-2. We find suitable conditions on f and It in order to ...