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32 papers · 1 filter
Topology Change and theta-Vacua in 2D Yang-Mills Theory
Tom D. Imbo, P. Teotonio-Sobrinho
We discuss the existence of -vacua in pure Yang-Mills theory in two space-time dimensions. More precisely, a procedure is given which allows one to classify the distinct quantum…
Search for Diphoton Events with Large Missing Transverse Energy in proton-antiproton collisions at sqrt(s) = 1.8 TeV
S. Abachi
A search for signals of new physics has been carried out in the channel p pbar -> gamma gamma + ETmiss. This signature is expected in various recently proposed supersymmetric (SUSY…
Search for Top Squark Pair Production in the Dielectron Channel
D0 Collaboration, S. Abachi
This report describes the first search for top squark pair production in the channel stop_1 stopbar_1 -> b bbar chargino_1 chargino_1 -> ee+jets+MEt using 74.9 +- 8.9 pb^-1 of data…
Limits on Anomalous Couplings from Events at TeV
The DZero Collaboration, S. Abachi
We have measured the gauge boson coupling parameters using () events at TeV. The data, corresponding to an integrated luminosi…
Hyper-Kahler Geometry and Invariants of Three-Manifolds
L. Rozansky, E. Witten
We study a 3-dimensional topological sigma-model, whose target space is a hyper-Kahler manifold X. A Feynman diagram calculation of its partition function demonstrates that it is a…
Evolution of the Fermi surface with carrier concentration in Bi_2Sr_2CaCu_2O_{8+δ}
H. Ding, M. R. Norman, T. Yokoya +6
We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi_2Sr_2CaCu_2O_{8+δ} appears to have a large Fermi surface centered at (π,π), even for samples with a…
Accuracy of Semiclassical Methods for Shape Invariant Potentials
Marina Hruska, Wai-Yee Keung, Uday Sukhatme
We study the accuracy of several alternative semiclassical methods by computing analytically the energy levels for many large classes of exactly solvable shape invariant potentials…
Non-Central Potentials and Spherical Harmonics Using Supersymmetry and Shape Invariance
Ranabir Dutt, Asim Gangopadhyaya, Uday P. Sukhatme
It is shown that the operator methods of supersymmetric quantum mechanics and the concept of shape invariance can profitably be used to derive properties of spherical harmonics in…
Potentials with Two Shifted Sets of Equally Spaced Eigenvalues and Their Calogero Spectrum
Asim Gangopadhyaya, Uday P. Sukhatme
Motivated by the concept of shape invariance in supersymmetric quantum mechanics, we obtain potentials whose spectrum consists of two shifted sets of equally spaced energy levels.…
Relating Quarkonium Wave Functions at the Origin
Sterrett J. Collins, Tom D. Imbo, B. Alex King +1
Within the context of nonrelativistic potential models, we obtain several formulas (with varying degrees of rigor) relating the wave functions at the origin of the , $b{…
A New Class of Automata Networks
N. Boccara, H. Fuks, S. Geurten
A new class of automata networks is defined. Their evolution rules are determined by a probability measure p on the set of all integers Z and an indicator function I_A on the inter…
Confinement, Spin, and QCD
M. G. Olsson
The experimental and theoretical evidence relating spin dependence and long range confinement is reviewed. One of the simplest confinement ideas, the dynamic electric flux tube pic…
Quarkonium Production At and in Decay
Kingman Cheung, Wai-Yee Keung, Tzu Chiang Yuan
The conventional color-singlet model was challenged by the recent data on quarkonium production. Discrepancies in production rates were observed at the Tevatron, at LEP, and in fix…
Manifestly Supersymmetric Lax Integrable Hierarchies
H. Aratyn, C. Rasinariu
A systematic method of constructing manifestly supersymmetric -dimensional KP Lax hierarchies is presented. Closed expressions for the Lax operators in terms of superfield eig…
New Limits on R-Parity Breakings in Supersymmetric Standard Models
Darwin Chang, W. -Y. Keung
New limits on couplings , which break both the baryon number and the --parity, are derived by using a new mechanism that contributes to the neutron-anti-neutron os…
Constrained KP Hierarchies: Additional Symmetries, Darboux-Bäcklund Solutions and Relations to Multi-Matrix Models
H. Aratyn, E. Nissimov, S. Pacheva
This paper provides a systematic description of the interplay between a specific class of reductions denoted as \cKPrm () of the primary continuum integrable system --…
DOP and FCP in generic structures
John T. Baldwin, Saharon Shelah
Spencer and Shelah [ShSp:304] constructed for each irrational alpha between 0 and 1 the theory T^alpha as the almost sure theory of random graphs with edge probability n^{- alpha}.…
Randomness and semigenericity
John T. Baldwin, Saharon Shelah
Let L contain only the equality symbol and let L^+ be an arbitrary finite symmetric relational language containing L . Suppose probabilities are defined on finite L^+ structures wi…
Triple Pseudoscalar Decay Mode,
Darwin Chang, W. -Y. Keung
We analyze the production of triple pseudoscalar Higgs bosons in the decay channel of for light pseudoscalar bosons when the corresponding scalar boson is too he…
Measurement of the Boson Mass
Marcel Demarteau
A measurement of the mass of the boson is presented based on a sample of 5982 decays observed in collisions at = 1.8~TeV with the…
Search for Anomalous WW and WZ Production in ppbar Collisions at sqrt(s) = 1.8 TeV
The DZero Collaboration, S. Abachi
We present results from a search for anomalous WW and WZ production in ppbar collisions at sqrt(s) = 1.8 TeV. We used ppbar->evjjX events observed during the 1992-1993 run of the F…
Statistical Properties of the Reflectance and Transmittance of an Amplifying Random Media
V. Freilikher, M. Pustilnik, I. Yurkevich
Statistical properties of the transmittance () and reflectance () of an amplifying layer with one-dimensional disorder are investigated analytically. Whereas the transmittanc…
Lattice Gauge Fields and Noncommutative Geometry
A. P. Balachandran, G. Bimonte, G. Landi +2
Conventional approaches to lattice gauge theories do not properly consider the topology of spacetime or of its fields. In this paper, we develop a formulation which tries to remedy…
Discrete Physics and the Dirac Equation
L. H. Kauffman, H. P. Noyes
We rewrite the 1+1 Dirac equation in light cone coordinates in two significant forms, and solve them exactly using the classical calculus of finite differences. The complex form yi…