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received from Mon 13 Jan 97 01:00:01 GMT to Tue 14 Jan 97 01:00:01 GMT
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Paper: hep-th/9701047
From: Rainer Dick <Raine...@Physik.Uni-Muenchen.DE>
Date: Mon, 13 Jan 97 10:35:29 -0600
Title: The Coulomb potential in gauge theory with a dilaton
Authors: Rainer Dick
Comments: 6 pages, LaTex
Report-no: LMU-TPW-97/02
\\
I calculate the potential of a pointlike particle carrying SU$(N_c)$ charge
in a gauge theory with a dilaton. The solution depends on boundary conditions
imposed on the dilaton: For a dilaton that vanishes at infinity the resulting
potential is of the form $(r+r_\phi)^{-1}$, with $r_\phi$ inverse proportional
to the decay constant of the dilaton. Another natural constraint for the
dilaton $\phi$ is independence of $(1/g^2)\exp(\phi/f_\phi)$ from
the gauge coupling $g$. This requirement yields a potential proportional to $r$
and makes it impossible to create an isolated SU$(N_c)$ charge.
\\ (http://xxx.lanl.gov/abs/hep-th/9701047 , 5kb)
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Paper: hep-th/9701048
From: du...@qcd.th.u-psud.fr (dudas)
Date: Mon, 13 Jan 1997 18:46:58 GMT
Title: On the strongly coupled heterotic string
Authors: Emilian Dudas, Jihad Mourad
Comments: 14 pages, LaTeX, no figures
Report-no: LPTHE-Orsay 96/104, GPS 96/110
\\
We analyze in detail the anomaly cancellation conditions for the strongly
coupled $E_8 \times E_8$ heterotic string introduced by Horava and Witten and
find new features compared to the ten-dimensional Green-Schwarz mechanism. We
project onto ten dimensions the corresponding Lagrangian of the zero-mode
fields. We find that it has a simple interpretation provided by the conjectured
heterotic string/fivebrane duality. The part which originates from
eleven-dimensions is naturally described in fivebrane language. We discuss
physical couplings and scales in four dimensions.
\\ (http://xxx.lanl.gov/abs/hep-th/9701048 , 12kb)
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Paper: hep-th/9701049
From: Gary Gibbons <G.W.G...@damtp.cam.ac.uk>
Date: Mon, 13 Jan 97 11:07:24 GMT
Title: Collapsing Shells and the Isoperimetric Inequality for Black Holes
Author: G W Gibbons
Comments: 16 pages plain TEX
Report-no: DAMTP/R/97/03
\\
Recent results of Trudinger on Isoperimetric Inequalities for non-convex
bodies are applied to the gravitational collapse of a lightlike shell of
matter to form a black hole. Using some integral identities for co-dimension
two surfaces in Minkowski spacetime, the area $A$ of the apparent horizon is
shown to be bounded above in terms of the mass $M$ by the $16 \pi G^2 M^2$,
which is consistent with the Cosmic Censorship Hypothesis. The results hold
in four spacetime dimensions and above.
\\ (http://xxx.lanl.gov/abs/hep-th/9701049 , 18kb)
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Paper: hep-th/9701050
From: ctsg...@cts.iisc.ernet.in (CTS Guest Account)
Date: Mon, 13 Jan 1997 16:14:20 +0600
Title: Gauge Invariances in the Proca model
Authors: A S Vytheeswaran (Bangalore University, India)
Comments: Latex file, 18 pages
\\
We show that the abelian Proca model, which is gauge non-invariant with
second class constraints can be converted into gauge theories with first class
constraints. The method used, which we call Gauge Unfixing employs a projection
operator defined in the original phase space. This operator can be constructed
in more than one way, and so we get more than one gauge theory. Two such gauge
theories are the Stuckelberg theory, and the theory of Maxwell field
interacting with an antisymmetric tensor field. We also show that the
application of the projection operator does not affect the Lorentz invariance
of this model.
\\ (http://xxx.lanl.gov/abs/hep-th/9701050 , 13kb)
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Paper: hep-th/9701051
From: "PROF FG SCHOLTZ ITF TEL 3476" <f...@land.sun.ac.za>
Date: Mon, 13 Jan 1997 15:19:45 GMT+200
Title: Gribov vs BRST
Authors: F. G. Scholtz and S. V. Shabanov
Comments: 13 pages, Revtex
Report-no: STPHY 23/96
\\
We investigate the way in which the Gribov problem is manifested in the BRST
quantization of simple quantum mechanical models by comparing models with and
without a Gribov problem. To keep contact with the measure and action of the
Faddeev-Popov path integral we quantize in the Hilbert space with conventional
inner product and we consider only the conventional choice of the gauge fixing
fermion. Furthermore we quantize under the standard assumption of hermitian
BRST charge. In the construction of the physical subspace we are careful to
avoid any formal arguments, and impose explicitly independence of physical
transition amplitudes from the gauge fixing fermion. We find that the Gribov
problem manifests itself on two levels. On the kinematical level we find that
all physical states have zero norm. More crucially, however, we find on the
dynamical level that no globally well defined gauge condition exists such that
the physical subspace, constructed under the condition above, is isomorphic to
the set of Dirac states. Thus BRST quantization is not equivalent to Dirac
quantization. This can also be interpreted as a violation of the
Batalin-Vilkovisky theorem. This implies a breakdown of unitarity and a general
dependence of physical quantities on the gauge condition.
\\ (http://xxx.lanl.gov/abs/hep-th/9701051 , 12kb)
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Paper: hep-th/9701052
From: Fernando Ruiz <F.R...@ThPhys.Uni-Heidelberg.DE>
Date: Mon, 13 Jan 1997 21:04:14 +0100 (MET)
Title: Supersymmetric Yang-Mills-Chern-Simons theory
Authors: F. Ruiz Ruiz and P. van Nieuwenhuizen
Comments: 6 pages, 1 figure, latex, espcrc2. Contribution to the Proceedings of
the 30th Ahrenshoop Symposium on the Theory of Elementary Particles, edited
by D. Lust, H.-J. Otto and G. Weigt, to appear in Nuclear Physics B,
Proceedings Supplement
Report-no: HD-TEP-97-01, ITP-SB-97-06
\\
We prove that three-dimensional N=1 supersymmetric Yang-Mills-Chern-Simons
theory is finite to all loops. This leaves open the possibility that different
regularization methods give different finite effective actions. We show that
for this model dimensional regularization and regularization by dimensional
reduction yield the same effective action.
\\ (http://xxx.lanl.gov/abs/hep-th/9701052 , 18kb)
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Paper: hep-th/9701053
From: Klaus Behrndt <beh...@qft2.physik.hu-berlin.de>
Date: Mon, 13 Jan 1997 14:39:26 +0100 (CET)
Title: Classical and quantum aspects of 4 dimensional black holes
Authors: Klaus Behrndt
Comments: 12 pages, LaTeX, 7 figures, epsfig.sty, espcrc2.sty (Contribution for
the ``30th Ahrenshoop Internat. Symp. on the Theory of Elem. Particles'',
Buckow, Germany)
Report-no: HUB-EP-97/03
\\
In this talk I address some aspects in the recent developments for N=2 black
holes in 4 dimensions. I restrict myself on axion-free solutions that can
classically be related to intersections of isotropic D- or M-branes. After
reviewing of some classical properties I include corrections coming from a
general cubic prepotential. On the heterotic side these are quantum corrections
for these black hole solutions. Finally, I discuss a microscopic interpretation
of the entropy for the extremal as well as near-extremal black hole.
\\ (http://xxx.lanl.gov/abs/hep-th/9701053 , 40kb)
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Paper: hep-th/9701054
From: F...@to.infn.it
Date: Mon, 13 Jan 1997 14:37:52 +0100 (MET)
Title: Supersymmetry and First Order Equations for Extremal States: Monopoles,
Hyperinstantons, Black-Holes and p-Branes
Author: Pietro Fr\'e
Notes: LaTeX, {article.sty, espcrc2.sty} 11 twocolumn pages. Invited Seminar
given at Santa Margerita Conference on Contrained Dynamics and Quantum
Gravity September 1995
\\
In this lecture I review recent results on the first order equations
describing BPS extremal states, in particular N=2 extremal black--holes. The
role of special geometry is emphasized also in the rigid theory and a
comparison is drawn with the supersymmetric derivation of instantons and
hyperinstantons in topological field theories. Work in progress on the
application of solvable Lie algebras to the discussion of BPS states in
maximally extended supergravities is outlined.
\\ (http://xxx.lanl.gov/abs/hep-th/9701054 , 19kb)
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Paper: hep-th/9701055
From: "Eric D'Hoker" <dho...@IAS.EDU>
Date: Mon, 13 Jan 1997 12:17:27 -0500 (EST)
Title: Strong Coupling Expansions of SU(N) Seiberg-Witten Theory
Authors: Eric D'Hoker and D. H. Phong
Comments: 13 pages, Plain Tex, no macros needed, no figures
\\
We set up a systematic expansion of the prepotential for ${\cal N}=2$
supersymmetric Yang-Mills theories with SU(N) gauge group in the region of
strong coupling where a maximal number of mutually local fields become
massless. In particular, we derive the first non-trivial non-perturbative
correction, which is the first term in the strong coupling expansion providing
a coupling between the different U(1) factors, and which governs for example
the strength of gaugino Yukawa couplings.
\\ (http://xxx.lanl.gov/abs/hep-th/9701055 , 11kb)
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Paper: hep-th/9701056
From: Sterrett J. Collins <col...@uicws.phy.uic.edu>
Date: Mon, 13 Jan 1997 17:42:03 MST
Title: Nonabelian Vortices on Surfaces and Their Statistics
Authors: Lee Brekke, Sterrett J. Collins, and Tom D. Imbo
Comments: 27 pages, 6 figures, requires harvmac
Report-no: UICHEP-TH/94-3
\\
We discuss the physics of topological vortices moving on an arbitrary surface
M in a Yang-Mills-Higgs theory in which the gauge group G breaks to a finite
subgroup H. We concentrate on the case where M is compact and/or nonorientable.
Interesting new features arise which have no analog on the plane. The
consequences for the quantum statistics of vortices are discussed, particularly
when H is nonabelian.
\\ (http://xxx.lanl.gov/abs/hep-th/9701056 , 26kb)
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Paper (*cross-listing*): alg-geom/9612015
From: tel...@math.unizh.ch (Teleman)
Date: Wed, 18 Dec 96 16:12:05 +0100
Date (revised): Mon, 13 Jan 97 18:10:00 +0100
Title: Recent Developments in Seiberg-Witten Theory and Complex Geometry
Authors: Christian Okonek, Andrei Teleman
Notes: 60 pages, LaTex 209, expanded version with section 2.3 added
\\
Recent developments in Seiberg-Witten theory and Complex Geometry. The paper
gives the first explicit formula for an instanton-invariant in terms of
Seiberg-Witten invariants. The proof is based on a gauge theoretic version of
the coupling principle, which is explained in the GIT framework.
\\ (alg-geom/9612015 , 43kb)
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Paper (*cross-listing*): gr-qc/9701022
From: James Hartle <har...@itp.ucsb.edu>
Date: Fri, 10 Jan 1997 16:22:53 -0800
Title: Quantum Cosmology: Problems for the 21st Century
Author: James B. Hartle (Institute for Theoretical Physics, University of
California, Santa Barbara)
Comments: 18pages, uses REVTEX 3.0, one embedded ps figure
Report-no: NSF-ITP-96-141, UCSBTH-96-26
\\
Two fundamental laws are needed for prediction in the universe: (1) a basic
dynamical law and (2) a law for the cosmological initial condition. Quantum
cosmology is the area of basic research concerned with the search for a theory
of the initial cosmological state. The issues involved in this search are
presented in the form of eight problems. (To appear in Physics 2001, ed. by M.
Kumar and in the Proceedings of the 10th Yukawa-Nishinomiya Symposium},
November 7--8, 1996, Nishinomiya, Japan.)
\\ (http://xxx.lanl.gov/abs/gr-qc/9701022 , 20kb)
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Paper (*cross-listing*): physics/9701009
From: Carsten Binnenhei <binn...@physik.fu-berlin.de>
Date: Fri, 10 Jan 1997 19:43:34 +0100 (MET)
Title: Implementation of Endomorphisms of the CAR Algebra
Authors: Carsten Binnenhei
Comments: 30 pages, Latex 2.09, uses amssym.def
Report-no: Sfb 288 Preprint No. 142
Subj-class: Mathematical Methods in Physics
Journal-ref: Rev. Math. Phys. 7 (1995) 833-869
\\
The implementation of non-surjective Bogoliubov transformations in Fock
states over CAR algebras is investigated. Such a transformation is
implementable by a Hilbert space of isometries if and only if the well-known
Shale-Stinespring condition is met. In this case, the dimension of the
implementing Hilbert space equals the square root of the Watatani index of the
associated inclusion of CAR algebras, and both are determined by the Fredholm
index of the corresponding one-particle operator. Explicit expressions for the
implementing operators are obtained, and the connected components of the
semigroup of implementable transformations are described.
\\ (http://xxx.lanl.gov/abs/physics/9701009 , 36kb)
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Paper (*cross-listing*): physics/9701010
From: Carsten Binnenhei <binn...@physik.fu-berlin.de>
Date: Fri, 10 Jan 1997 20:47:37 +0100 (MET)
Title: On The Even CAR Algebra
Authors: Carsten Binnenhei
Comments: 3 pages, Latex, uses amssym.def and kluwer.sty, appears in Lett.
Math. Phys
Report-no: Sfb 288 Preprint No. 202
Subj-class: Mathematical Methods in Physics
\\
We exhibit a family of *-isomorphisms mapping the CAR algebra onto its even
subalgebra.
\\ (http://xxx.lanl.gov/abs/physics/9701010 , 19kb)
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Paper (*cross-listing*): physics/9701011
From: Carsten Binnenhei <binn...@physik.fu-berlin.de>
Date: Fri, 10 Jan 1997 21:29:05 +0100 (MET)
Title: $O_\infty$ Realized on Bose Fock Space
Authors: Carsten Binnenhei
Comments: 20 pages, Latex, uses amsmath
Report-no: Sfb 288 Preprint No. 246
Subj-class: Mathematical Methods in Physics
\\
We study the semigroup of Bogoliubov endomorphisms of the canonical
commutation relations which give rise to representations of the Cuntz algebra
$O_\infty$ on Fock space and describe the corresponding Cuntz algebra
generators in detail.
\\ (http://xxx.lanl.gov/abs/physics/9701011 , 21kb)
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Paper: hep-th/9512058
replaced with revised version Mon, 13 Jan 1997 18:50:11
Title: The Affine-Metric Quantum Gravity with Extra Local Symmetries
Authors: M. Yu. Kalmykov
Comments: 14 pages in LATEX (The version of paper accepted for publication in
Class. Quant. Grav.)
\\ (http://xxx.lanl.gov/abs/hep-th/9512058 , 13kb)
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Paper: hep-th/9605027
replaced with revised version Mon, 13 Jan 1997 13:32:42 EST
Title: The Gross-Neveu Model and the Supersymmetric and Non-Supersymmetric
Nambu-Jona-Lasinio Model in a Magnetic Field
Authors: V.Elias, D.G.C.McKeon, V.A.Miransky, and I.A.Shovkovy
Comments: ReVTeX file, 14 pages including 1 figure. The final version that was
published in Phys.Rev
Journal-ref: Phys.Rev. D54 (1996) 7884
\\ (http://xxx.lanl.gov/abs/hep-th/9605027 , 19kb)
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Paper: hep-th/9606174
replaced with revised version Mon, 13 Jan 1997 13:28:00 -0500 (EST)
Title: Invariant Regularization of Anomaly-Free Chiral Theories
Authors: Lay Nam Chang and Chopin Soo
Comments: 28pgs, LaTeX. Typos corrected. Further remarks on singlet currents
Report-no: VPI-IPPAP-96-3
\\ (http://xxx.lanl.gov/abs/hep-th/9606174 , 20kb)
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Paper: hep-th/9612044
replaced with revised version Mon, 13 Jan 1997 10:06:29 +0800 (CST)
Title: Poisson Structures for Dispersionless Integrable Systems and Associated
W-Algebras
Authors: Yi Cheng, Zhifeng Li
Comments: Latex, 11 pages, no figures; Lett. Math. Phys
\\ (http://xxx.lanl.gov/abs/hep-th/9612044 , 7kb)
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Paper (*cross-listing*): gr-qc/9604002
replaced with revised version Mon, 13 Jan 1997 9:14:56 +0100 (CET)
Title: Normal modes for metric fluctuations in a class of higher-dimensional
backgrounds
Authors: M. Gasperini and M. Giovannini
Comments: 19 pages, LATEX, an explicit example is added to discuss the possible
dependence of the perturbation spectrum on the number of internal dimensions.
To apper in Class. Quantum Grav
Report-no: CERN-TH/96-87
\\ (http://xxx.lanl.gov/abs/gr-qc/9604002 , 15kb)
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Paper (*cross-listing*): physics/9611002
replaced with revised version Mon, 13 Jan 1997 03:51:03 MST
Title: An Explicit Construction of Casimir Operators and Eigenvalues:II
Authors: H.R. Karadayi and M. Gungormez
Comments: 16 pages, no figures, TeX file,the formulas (II.14) and (II.15) are
corrected, change in e-mail address
Report-no: ITU-HEP-07
Subj-class: Mathematical Methods in Physics
\\ (http://xxx.lanl.gov/abs/physics/9611002 , 12kb)
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Paper (*cross-listing*): physics/9701004
replaced with revised version Mon, 13 Jan 1997 12:26:33 +0200 (EET)
Title: The Complete Cohomology of $E_8$ Lie Algebra
Authors: H.R.Karadayi and M.Gungormez
Comments: 17 pages, in TeX file, change in e-mail address
Report-no: ITU-HEP-97-01
Subj-class: Mathematical Methods in Physics
\\ (http://xxx.lanl.gov/abs/physics/9701004 , 15kb)
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Comments: 3 pages, latex, no figures, mpeg simulations available at
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Report-no: EFI-96-40
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