hep-th daily 9701013 -- 9701015 received (over 3522 served) 1876
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received from Mon 6 Jan 97 01:00:01 GMT to Tue 7 Jan 97 01:00:00 GMT
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Paper: hep-th/9701013
From: Christoph Adam <ad...@ctpa02.mit.edu>
Date: Mon, 6 Jan 1997 12:12:57 -0500 (EST)
Title: Scattering processes in the massive Schwinger model
Author: C. Adam
Comments: 25 pages, RevTex, 14 ps-figures, needed macro: psbox.tex
Report-no: MIT-CTP-2602
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We derive the (matrix-valued) Feynman rules of the mass perturbation theory
and use it for the resummation of the $n$-point functions with the help of the
Dyson-Schwinger equations. We use these results for a short review of the
complete spectrum of the model and for a discussion of scattering processes. We
find that in scattering cross sections all the resonances and higher particle
production thresholds of the model are properly taken into account by our
resummed mass perturbation theory, without the need of further approximations.
\\ (http://xxx.lanl.gov/abs/hep-th/9701013 , 58kb)
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Paper: hep-th/9701014
From: Andrei Mironov <mir...@heron.itep.ru>
Date: Mon, 6 Jan 1997 22:18:36 +0200
Title: WDVV Equations from Algebra of Forms
Authors: A. Marshakov, A. Mironov and A. Morozov
Comments: LaTeX, 14 pages, no figures
Report-no: ITEP/TH-02/97, FIAN/TD-01/97
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A class of solutions to the WDVV equations is provided by period matrices of
hyperelliptic Riemann surfaces, with or without punctures. The equations
themselves reflect associativity of explicitly described multiplicative algebra
of (possibly meromorphic) 1-differentials, which holds at least in the
hyperelliptic case. This construction is direct generalization of the old one,
involving the ring of polynomials factorized over an ideal, and is inspired by
the study of the Seiberg-Witten theory. It has potential to be further extended
to reveal algebraic structures underlying the theory of quantum cohomologies
and the prepotentials in string models with N=2 supersymmetry.
\\ (http://xxx.lanl.gov/abs/hep-th/9701014 , 14kb)
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Paper: hep-th/9701015
From: Cumrun Vafa <va...@string.harvard.edu>
Date: Mon, 6 Jan 97 15:08:19 -0500
Title: N=1 Dualities of SO and USp Gauge Theories and T-Duality of String
Theory
Authors: Cumrun Vafa and Barton Zwiebach
Comments: 15 pages
Report-no: HUTP/A001
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Extending recent work on SU gauge theory, we engineer local string models
for N=1 four-dimensional SO and USp gauge theories coupled to matter in
the fundamental. The local models are type IIB orientifolds with D7 branes on a
curved orientifold 7-plane, and matter realized by adding D3 branes on the
orientifold plane. The Higgs branches of the SO and USp theories can be
matched with the moduli spaces of SO and USp instantons on the compact
four-dimensional part of the D7 branes worldvolume. The R-charge of the gauge
theories is identified with a U(1) symmetry on the worldvolume of an
Euclidean D3 brane instanton. We argue that the quantum field theory dualities
of these gauge theories arise from T-dualities of type IIB strings exchanging
D7 and D3 charges. A crucial role is played by the induced D3 charge of D7
branes and an orientifold 7-plane, both partially compactified on a $Z_2$
orbifold of K3.
\\ (http://xxx.lanl.gov/abs/hep-th/9701015 , 14kb)
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Paper: hep-th/9606197
replaced with revised version Mon, 6 Jan 1997 23:56:23 +22299913 (KORST)
Title: The effective action of (2+1)-dimensional QED: the effect of finite
fermion density
Authors: Dae Kwan Kim (Seoul National University) and Kwang-Sup Soh (Seoul
National University)
Comments: 10 pages, Revtex, No figures
Report-no: SNUTP-96-068
\\ (http://xxx.lanl.gov/abs/hep-th/9606197 , 8kb)
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Paper (*cross-listing*): hep-ph/9612282
replaced with revised version Mon, 6 Jan 97 16:57:10 PST
Title: Semi-Analytical Approaches to Local Electroweak Baryogenesis
Authors: Arthur Lue (MIT), Krishna Rajagopal (Caltech), Mark Trodden (MIT)
Comments: 31 pages, revtex, one figure, epsf, only change is one new reference
Report-no: MIT-CTP-2590,CALT-68-2089
\\ (http://xxx.lanl.gov/abs/hep-ph/9612282 , 26kb)
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Paper (*cross-listing*): cond-mat/9701002
replaced with revised version Mon, 6 Jan 97 15:51:41 +0900
Title: Boundary S matrices for the open Hubbard chain with boundary fields
Authors: Osamu Tsuchiya
Comments: Latex,12 pages
Report-no: UT-Komaba 96-31
Subj-class: Statistical Mechanics
\\ (http://xxx.lanl.gov/abs/cond-mat/9701002 , 10kb)
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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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