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hep-th2000

Dark Energy in Extra Dimensions and String Theory: Consistency Conditions

Hans Peter Nilles

The smallness of the cosmological constant is one of the basic problems in particle physics and cosmology. Various attempts have been made to explain this mystery, but no satisfact…

hep-th2000★ 2 cited

Fine-Tuning of the Cosmological Constant in Brane Worlds

Stefan Forste

We discuss how the fine-tuning of the cosmological constant enters brane world setups. After presenting the Randall Sundrum model as a prototype case, we focus on single brane mode…

astro-ph2000

In search for the oldest star forming regions in Holmberg II

J. Kerp, F. Walter

We present an X-ray study of the irregular dwarf galaxy Holmberg II based on deep ROSAT PSPC observations. Holmberg II is one of the most famous examples of an irregular dwarf gala…

astro-ph2000

Optical/Infrared Survey of Galaxy Clusters

Luiz da Costa, S. Arnouts, S. Bardelli +13

In this contribution the ongoing effort to build a statistical sample of clusters of galaxies over a wide range of redshifts to study the evolution of clusters and member galaxies…

astro-ph2000★ 24 cited

ORFEUS echelle spectra: Molecular hydrogen in disk, IVC, and HVC gas in front of the LMC

Hartmut Bluhm, Klaas. S. de Boer, Ole Marggraf +1

In front of the LMC molecular hydrogen is found in absorption near 0 km/s, being local disk gas, near +60 km/s in an intermediate velocity cloud, and near +120 km/s, in a high velo…

cond-mat.supr-con2000★ 61 cited

Thermodynamic properties of a small superconducting grain

M. Schechter, Y. Imry, Y. Levinson +1

The reduced BCS Hamiltonian for a metallic grain with a finite number of electrons is considered. The crossover between the ultrasmall regime, in which the level spacing, , is l…

astro-ph2000★ 45 cited

Cluster Mass Profiles from Weak Lensing II

Lindsay King, Peter Schneider

In Schneider, King & Erben (2000) we developed likelihood techniques to compare the constraints on cluster mass profiles that can be obtained using the shear and magnification info…

quant-ph2000★ 57 cited

Teleportation of general finite dimensional quantum systems

Sergio Albeverio, Shao-Ming Fei

Teleportation of finite dimensional quantum states by a non-local entangled state is studied. For a generally given entangled state, an explicit equation that governs the teleporta…

math.RA2000

Integration on Lie supergroups. A Hopf superalgebra approach

M. Scheunert, R. B. Zhang

For a large class of finite-dimensional Lie superalgebras (including the classical simple ones) a Lie supergroup associated to the algebra is defined by fixing the Hopf superalgebr…

astro-ph2000★ 12 cited

A Search for CO in the Local Group Dwarf Irregular Galaxy WLM

C. L. Taylor, U. Klein

We present 12CO J = 1-0 and J = 2-1 observations of the low metallicity (12 + log(O/H) = 7.74) Local Group dwarf irregular galaxy WLM made with the 15 m SEST and 14 m FCRAO telesco…

astro-ph2000

Terapixel Surveys for Cosmic Shear

Y. Mellier, L. van Waerbeke, M. Radovich +14

The recent detections of cosmic shear signal announced by several groups have demonstrated the feasibility of this challenging program and convinced astro- nomers of its potential…

nucl-th2000★ 2 cited

Photoproduction of -mesons off light nuclei

N. V. Shevchenko, V. B. Belyaev, S. A. Rakityansky +2

Photoproduction of -mesons off deuteron is studied within the Alt-Grassberger-Sandhas formalism for different parameters of interaction. The calculations revealed peaks in…

astro-ph2000

The First Complete and Fully Sampled HI Survey of the Tidal Arms of the Magellanic System

C. Bruens, J. Kerp, L. Staveley-Smith

The LMC, SMC, and the Milky Way are a spectacular set of interacting galaxies. The prominent tidal arms which protrude from the Magellanic Clouds extend for tens of kiloparsecs and…

hep-th2000★ 10 cited

On the Cohomological Structure of Supersymmetric Lagrangeans With and Without Auxiliary Fields

K. Ulker

The origin of non-renormalization theorems in field theories with global supersymmetry can be traced to the fact that supersymmetric actions can be viewed as the highest components…

hep-ph2000

Recent Developments in Supersymmetric Dark Matter

Achille Corsetti, Pran Nath

A brief review is given of some of the recent developments in the theoretical analyses of supersymmetric dark matter. These include the effects of uncertainties in the wimp velocit…

nucl-ex2000★ 25 cited

Simultaneous Measurements of the Reactions

M. Betigeri, J. Bojowald, A. Budzanowski +28

A stack of annular detectors made of high purity germanium was used to measure simultaneously and differential cross sections at beam momenta o…

astro-ph2000★ 133 cited

Cosmic Shear Analysis in 50 Uncorrelated VLT Fields. Implications for Omega_0, sigma_8

R. Maoli, L. Van Waerbeke, Y. Mellier +5

We observed with the camera FORS1 on the VLT (UT1, ANTU) 50 randomly selected fields and analyzed the cosmic shear inside circular apertures with diameter ranging from 0.5 to 5.0 a…

astro-ph2000★ 56 cited

The Interaction between the ISM and Star Formation in the Dwarf Starburst Galaxy NGC 4214

F. Walter, C. Taylor, S. Huettemeister +2

We present the first interferometric study of the molecular gas in the metal-poor dwarf starburst galaxy NGC 4214. Our map of the 12CO(1-0) emission, obtained at the OVRO millimete…

hep-ex2000

Measurements of Diffractive Vector-Meson Photoproduction at High Momentum Transfer from the ZEUS Experiment at HERA

J. A. Crittenden

We discuss recent preliminary results on the diffractive photoproduction of {\rhoz}, , and {\jpsi} mesons at high momentum transfer reported by the ZEUS collaboration at HERA. A…

math-ph2000★ 1 cited

Comment on: Modular Theory and Geometry

Kurusch Ebrahimi-Fard

In this note we comment on part of a recent article by B. Schroer and H.-W. Wiesbrock. Therein they calculate some new modular structure for the U(1)-current-algebra (Weyl-algebra)…

hep-th2000★ 5 cited

The Lax pairs for elliptic C_n and BC_n Ruijsenaars-Schneider models and their spectral curves

Kai Chen, Bo-yu Hou, Wen-Li Yang

We study the elliptic C_n and BC_n Ruijsenaars-Schneider models which is elliptic generalization of system given in hep-th/0006004. The Lax pairs for these models are constructed b…

astro-ph2000★ 201 cited

The effect of violent star formation on the state of the molecular gas in M82

A. Weiss, N. Neininger, S. Huettemeister +1

We present the results of a high angular resolution, multi-transition analysis of the molecular gas in M82. The analysis is based on the two lowest transitions of 12CO and the grou…

cond-mat.str-el2000★ 69 cited

Linked Cluster Series Expansions for Two-Particle Bound States

Weihong Zheng, C. J. Hamer, R. R. P. Singh +2

We develop strong-coupling series expansion methods to study two-particle spectra of quantum lattice models. At the heart of the method lies the calculation of an effective Hamilto…

cond-mat.str-el2000★ 21 cited

Deconfinement Transition and Bound States in Frustrated Heisenberg Chains: Regimes of Forced and Spontaneous Dimerization

Weihong Zheng, C. J. Hamer, R. R. P. Singh +2

We use recently developed strong-coupling expansion methods to study the two-particle spectra for the frustrated alternating Heisenberg model, consisting of an alternating nearest…