143 research outputs found
On form-factors in Sin(h)-Gordon theory
We present here an explicit classical solution of the type of perturbiner in
Sin(h)-Gordon model. This solution is a generating function for form-factors in
the tree approximation.Comment: 10 pages, late
New fields on super Riemann surfaces
A new -dimensional super vector bundle which exists on any super
Riemann surface is described. Cross-sections of this bundle provide a new class
of fields on a super Riemann surface which closely resemble holomorphic
functions on a super Riemann surface, but which (in contrast to the case with
holomorphic functions) form spaces which have a well defined dimension which
does not change as odd moduli become non-zero.Comment: 12pp, kcl-th-94-
Isolated vacua in supersymmetric Yang-Mills theories
An explicit proof of the existence of nontrivial vacua in the pure
supersymmetric Yang-Mills theories with higher orthogonal SO(N), N>=7 or the
G_2 gauge group defined on a 3-torus with periodic boundary conditions is
given. Extra vacuum states are separated by an energy barrier from the
perturbative vacuum A_i=0 and its gauge copies.Comment: 8 pages, no figures, late
Harmonic Superspaces in Low Dimensions
Harmonic superspaces for spacetimes of dimension are constructed.
Some applications are given.Comment: 16, kcl-th-94-15. Two further references have been added (12 and 13)
and a few typographical errors have been correcte
Quantitative infrared thermography resolved leakage current problem in cathodic protection system
Leakage current problem can happen in Cathodic Protection
(CP) system installation. It could affect the performance of
underground facilities such as piping, building structure, and
earthing system. Worse can happen is rapid corrosion where
disturbance to plant operation plus expensive maintenance
cost. Occasionally, if it seems, tracing its root cause could be
tedious. The traditional method called line current
measurement is still valid effective. It involves isolating one
by one of the affected underground structures. The recent
methods are Close Interval Potential Survey and Pipeline
Current Mapper were better and faster. On top of the
mentioned method, there is a need to enhance further by
synthesizing with the latest visual methods. Therefore, this
paper describes research works on Infrared Thermography
Quantitative (IRTQ) method as resolution of leakage current
problem in CP system. The scope of study merely focuses on
tracing the root cause of leakage current occurring at the CP
system lube base oil plant. The results of experiment
adherence to the hypothesis drawn. Consequently, res
On maximally supersymmetric Yang-Mills theories
We consider ten-dimensional supersymmetric Yang-Mills theory (10D SUSY YM
theory) and its dimensional reductions, in particular, BFSS and IKKT models. We
formulate these theories using algebraic techniques based on application of
differential graded Lie algebras and associative algebras as well as of more
general objects, L_{\infty}- and A_{\infty}- algebras.
We show that using pure spinor formulation of 10D SUSY YM theory equations of
motion and isotwistor formalism one can interpret these equations as
Maurer-Cartan equations for some differential Lie algebra. This statement can
be used to write BV action functional of 10D SUSY YM theory in Chern-Simons
form. The differential Lie algebra we constructed is closely related to
differential associative algebra Omega of (0, k)-forms on some supermanifold;
the Lie algebra is tensor product of Omega and matrix algebra .
We construct several other algebras that are quasiisomorphic to Omega and,
therefore, also can be used to give BV formulation of 10D SUSY YM theory and
its reductions. In particular, Omega is quasiisomorphic to the algebra B
constructed by Berkovits. The algebras Omega_0 and B_0 obtained from Omega and
B by means of reduction to a point can be used to give a BV-formulation of IKKT
model.
We introduce associative algebra SYM as algebra where relations are defined
as equations of motion of IKKT model and show that Koszul dual to the algebra
B_0 is quasiisomorphic to SYM.Comment: 43 pages. Details are added in the construction of trace in section
4. Added references. Formula for vector filed E on p.5,11 correcte
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