944 research outputs found
Hamiltonian Analysis of Non-Linear Sigma Model on Supercoset Target
This paper is devoted to the study of the Hamiltonian formulation of
non-linear sigma models on supercoset targets. We calculate the Poisson
brackets of left-invariant currents. Then we introduce the Hamiltonian of the
system and determine the equations of motion for left-invariant currents. We
also determine the charge corresponding to the invariance of the action under
global left multiplication.Comment: 17. pages,v2: references added, v3: references added, minor
correction
Toxicity of some organic biocides to exotic carp fingerlings Hypophthalmichthys molitrix (C and V)
A bioassay study was conducted using three organic pesticides to determine their comparative toxicity to fingerlings of Hypophthalmichthys molitrix. There was wide variation in the toxicity of different pesticides with 24 hr LC sub(50) values ranging from 0.000403 to 0.294 mg/l. Endosulfan appeared to be the most toxic, whereas BHC was the least
Two Graviton Production at and Hadron Hadron Colliders in the Randall-Sundrum Model
We compute the pair production cross section of two Kaluza Klein modes in the
Randall-Sundrum model at and hadron hadron colliders. These processes
are interesting because they get dominant contribution from the graviton
interaction at next to leading order. Hence they provide a nontrivial test of
the low scale gravity models. All the Feynman rules at next to leading order
are also presented. These rules may be useful for many phenomenological
applications including the computation of higher order loop corrections.Comment: 24 pages, 11 figures, some typos correcte
Is bastaardering tussen zomer- en wintereik een gevaar voor de vitaliteit van eiken
Over het begrip soort bij zomereik en wintereik (twee soorten of één soot met twee ecotypen), de morfologische verschillen, het voorkomen van soorten met intermediaire morfologische kenmerken in gemengde eikenbossen, en de vraag of hierbij sprake is van echte hybriden of niet. Kruisingsexperimenten en internationaal onderzoek naar de genetische diversiteit met behulp van bladkenmerken lossen het probleem van de bastaardisering tussen zomer- en wintereiken in Europa niet op; ouderschapsanalyse met behulp van DNA-technologie moet uitkomst brenge
Choice of estimator for distribution system state estimation
Accepted versio
The Classical Exchange Algebra of AdS5 x S5 String Theory
The classical exchange algebra satisfied by the monodromy matrix of AdS5 x S5
string theory in the Green-Schwarz formulation is determined by using a
first-order Hamiltonian formulation and by adding to the Bena-Polchinski-Roiban
Lax connection terms proportional to constraints. This enables in particular to
show that the conserved charges of this theory are in involution. This result
is obtained for a general world-sheet metric. The same exchange algebra is
obtained within the pure spinor description of AdS5 x S5 string theory. These
results are compared to the one obtained by A. Mikhailov and S. Schaefer-Nameki
for the pure spinor formulation.Comment: 37 pages; v2: Result on Jacobi identity and Yang-Baxter equation
added in section 3.3; v3: References added; v4: Comparison with ref [12]
clarified in section 3.
Note About Integrability and Gauge Fixing for Bosonic String on AdS(5)xS(5)
This short note is devoted to the study of the integrability of the bosonic
string on AdS(5)xS(5) in the uniform light-cone gauge. We construct Lax
connection for gauge fixed theory and we argue that it is flat.Comment: 17 page
Matrix Cosmology
Exact time-dependent solutions of c=1 string theory are described using the
free fermion formulation. One such class of solutions describes draining of the
Fermi sea and has a spacetime interpretation as closed string tachyon
condensation. A second class of solutions, corresponding to droplets of Fermi
liquid orbiting in phase space, describes closed cosmologies which bounce
through singularities.Comment: 21 pages, 6 figures, v2: added references, minor additions and
correction
Nonlocal charges of T-dual strings
We obtain sets of infinite number of conserved nonlocal charges of strings in
a flat space and pp-wave backgrounds, and compare them before and after
T-duality transformation. In the flat background the set of nonlocal charges is
the same before and after the T-duality transformation with interchanging odd
and even-order charges. In the IIB pp-wave background an infinite number of
nonlocal charges are independent, contrast to that in a flat background only
the zero-th and first order charges are independent. In the IIA pp-wave
background, which is the T-dualized compactified IIB pp-wave background, the
zero-th order charges are included as a part of the set of nonlocal charges in
the IIB background. To make this correspondence complete a variable conjugate
to the winding number is introduced as a Lagrange multiplier in the IIB action
a la Buscher's transformation.Comment: 23 pages, 1 figur
- …