26 citations · 141 across the 24 of their papers we have counts for
12 papers · 1 filter
On string momentum in effective string theories
N. D. Hari Dass
Centre of mass momentum for strings is an important ingredient in the calculation of the spectrum of string theories. It is calculated by the Nöther prescription for two types of c…
All Conformal Effective String Theories are Isospectral to Nambu-Goto Theory
N. D. Hari Dass
It is shown that all Polchinski-Strominger effective string theories are \emph{isospectral} to Nambu-Goto theory. The relevance of these results to QCD-Strings is discussed.
Spectrum to all orders of Polchinski-Strominger Effective String Theories of the Drummond Type
N. D. Hari Dass, Yashas Bharadwaj
Drummond had proposed four actions for Polchinski-Strominger effective string theories at order , where is the length of the (closed) string >. In \cite{covariant} it…
Spectrum to all orders of Polchinski-Strominger {Effective} String Theory of Polyakov-Liouville Type
N. D. Hari Dass, Peter Matlock, Yashas Bharadwaj
The spectrum of a Polchinski-Strominger type effective string theory, extended to all orders, herein called an effective string theory of the \emph{Polyakov-Liouville Type} (for ob…
Vacuum polarisation induced coupling between Maxwell and Kalb-Ramond Fields
N. D. Hari Dass, K. V. Shajesh
We present here a manifestly gauge invariant calculation of vacuum polarization to fermions in the presence of a constant Maxwell and a constant Kalb-Ramond field in four dimension…
Simplified Method for Trace Anomaly Calculations in d=6 and d<6
Fiorenzo Bastianelli, N. D. Hari Dass
We discuss a simplified method for computing trace anomalies in d=6 and d<6 dimensions. It is known that in the quantum mechanical approach trace anomalies in d dimensions are give…
Asymptotically Free Non-Abelian Gauge Theories With Fermions and Scalars As Alternatives to QCD
N. D. Hari Dass, V. Soni
In this paper we construct non-Abelian gauge theories with fermions and scalars that nevertheless possess asymptotic freedom.The scalars are taken to be in a chiral multiplet trans…
Regularisation of Chiral Gauge Theories
N. D. Hari Dass
This article gives a review of the topic of regularising chiral gauge theories and is aimed at a general audience. It begins by clarifying the meaning of chirality and goes on to d…
On Finite Size Effects in Quantum Gravity
N. D. Hari Dass
A systematic investigation is given of finite size effects in quantum gravity or equivalently the theory of dynamically triangulated random surfaces. For Ising models coupled…
Interaction of F- and D-strings in the Matrix Model
N. D. Hari Dass, B. Sathiapalan
We study a configuration of a parallel F- (fundamental) and D- string in IIB string theory by considering its T-dual configuration in the matrix model description of M-theory. We s…
Finite Size Effects for the Ising Model Coupled to 2-D Random Surfaces
N. D. Hari Dass, B. E. Hanlon, T. Yukawa
Finite size effects for the Ising Model coupled to two dimensional random surfaces are studied by exploiting the exact results from the 2-matrix models. The fixed area partition fu…
Infrared Behaviour of Systems With Goldstone Bosons
Ramesh Anishetty, Rahul Basu, N. D. Hari Dass +1
We develop various complementary concepts and techniques for handling quantum fluctuations of Goldstone bosons.We emphasise that one of the consequences of the masslessness of Gold…