15 research outputs found
Square Root Singularity in Boundary Reflection Matrix
Two-particle scattering amplitudes for integrable relativistic quantum field
theory in 1+1 dimensions can normally have at most singularities of poles and
zeros along the imaginary axis in the complex rapidity plane. It has been
supposed that single particle amplitudes of the exact boundary reflection
matrix exhibit the same structure. In this paper, single particle amplitudes of
the exact boundary reflection matrix corresponding to the Neumann boundary
condition for affine Toda field theory associated with twisted affine algebras
are conjectured, based on one-loop result, as having a new kind
of square root singularity.Comment: 10 pages, latex fil
A comparison of the effectiveness of extracorporeal shock wave and ultrasound therapy in the management of heel pain
Role of exotic tree stands on the current distribution and social behaviour of Swainson’s hawk, Buteo swainsoni in the Argentine Pampas
Aim The Argentine Pampas was extensively and abruptly altered by European
colonization. Between 1880 and 1885 the indigenous human inhabitants were
completely displaced, and native grasslands were replaced by exotic pasture plants
and crops. One of the most important ecological changes in the Pampas
landscape, the introduction of tall exotic tree species, has received little attention,
and its effect on wildlife has never been assessed. We have made an intensive
survey of habitat use of Swainson’s hawk, Buteo swainsoni in its most important
non-breeding quarters, the Pampas of Argentina, aiming to characterize the sites
used by hawks for communal roosting.Peer reviewe