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19912026
Showing 2004Show all

210 papers · 1 filter

hep-th2004★ 287 cited

Stability of flux compactifications and the pattern of supersymmetry breaking

K. Choi, A. Falkowski, H. P. Nilles +2

We extend the KKLT approach to moduli stabilization by including the dilaton and the complex structure moduli into the effective supergravity theory. Decoupling of the dilaton is n…

astro-ph2004★ 1 cited

Weak lensing measurements of dark matter halos of galaxies from COMBO-17

M. Kleinheinrich, P. Schneider, H. -W. Rix +8

We present a measurement of mass estimates for dark matter halos around galaxies from the COMBO-17 survey using weak gravitational lensing. COMBO-17 is particularly useful for this…

hep-ph2004★ 62 cited

Dual Models of Gauge Unification in Various Dimensions

Wilfried Buchmuller, Koichi Hamaguchi, Oleg Lebedev +1

We construct a compactification of the heterotic string on an orbifold T^6/Z_6 leading to the standard model spectrum plus vector--like matter. The standard model gauge group is ob…

astro-ph2004★ 38 cited

VLBI observations of weak sources using fast frequency switching

E. Middelberg, A. L Roy, R. C. Walker +1

We have developed a new phase referencing technique for high frequency VLBI observations. In conventional phase referencing, one interleaves short scans on a nearby phase calibrato…

astro-ph2004★ 51 cited

Triaxial haloes, intrinsic alignments and the dark matter power spectrum

R. E. Smith, P. I. R. Watts

(Abridged) We develop the halo model of large-scale structure to include triaxial dark matter haloes and their intrinsic alignments. As a direct application we derive general expre…

astro-ph2004★ 26 cited

Kinematics of RHB stars to trace the structure of the galaxy

T. A. Kaempf, K. S. de Boer, M. Altmann

Red horizontal-branch (RHB) stars have been selected from the HIPPARCOS catalogue to investigate their kinematics and spatial distribution. HIPPARCOS parallaxes, literature radial…

math.AP2004

Spectral projections for the twisted Laplacian

Herbert Koch, Fulvio Ricci

The twisted Laplacian in the d=2n dimensional Euclidean space has the spectrum n+2k, k a nonnegative integer. We find sharp asymptotic bounds of the norm of the projection to the e…

astro-ph2004★ 43 cited

Discovery of two M32 twins in Abell 1689

S. Mieske, L. Infante, M. Hilker +5

The M31 satellite galaxy M32 has long been considered an object of unique properties, being the most extreme example of the very rare compact elliptical galaxy class. Here we prese…

astro-ph2004

The galaxy-dark matter bias in the Garching-Bonn Deep Survey

Patrick Simon, Peter Schneider, Thomas Erben +3

We measured the bias and correlation factor of galaxies with respect to the dark matter using the aperture statistics including the aperture mass from weak gravitational lensing. T…

hep-th2004★ 2 cited

Bottom Up Meets Heterotic Strings

Stefan Forste, Akin Wingerter

In this talk we argue that a certain class of heterotic orbifolds can be the underlying fundamental theory for recently studied field theory GUTs. In addition we demonstrate that s…

astro-ph2004★ 1 cited

Searching for the Missing Baryons in the Warm-hot Intergalactic Medium

P. Richter, B. D. Savage, T. M. Tripp +1

We discuss physical properties and the baryonic content of the Warm-hot Intergalactic Medium (WHIM) at low redshifts. Cosmological simulations predict that the WHIM contains a larg…

astro-ph2004

IMF variations and their implications for Supernovae numbers

C. Weidner, P. Kroupa

The stellar initial mass function (IMF) integrated over an entire galaxy is an integral over all separate star-formation events. Since most stars form in star clusters with differe…

hep-ex2004★ 5 cited

Mulit-Photon Events with Large Missing energy in e+e- collisions at sqrt(s)=192-209 GeV

The OPAL collaboration, G. Abbiendi

Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 -…

physics.ins-det2004★ 5 cited

The ATLAS Pixel Detector

Fabian Huegging

The contruction of the ATLAS Pixel Detector which is the innermost layer of the ATLAS tracking system is prgressing well. Because the pixel detector will contribute significantly t…

nucl-ex2004★ 15 cited

Excitation functions of spin correlation parameters A_{NN}, A_{SS}, and A_{SL} in elastic pp scattering between 0.45 and 2.5 GeV

F. Bauer

Excitation functions of the spin correlation coefficients A_{NN}(p_{lab},theta_{c.m.}), A_{SS}(p_{lab},theta_{c.m.}), and A_{SL}(p_{lab},theta_{c.m.}) have been measured with the p…

nucl-ex2004★ 8 cited

Detailed comparison of the pp -> π^+pn and pp -> π^+d reactions at 951 MeV

GEM collaboration, M. Abdel-Bary

The positively charged pions produced in proton-proton collisions at a beam momentum of 1640 MeV/c were measured in the forward direction with a high resolution magnetic spectrogra…

math.GT2004★ 5 cited

A splitting formula for the spectral flow of the odd signature operator on 3-manifolds coupled to a path of SU(2) connections

Benjamin Himpel

We establish a splitting formula for the spectral flow of the odd signature operator on a closed 3-manifold M coupled to a path of SU(2) connections, provided M = S cup X, where S…

hep-ph2004★ 21 cited

Radiative Ke3 decays revisited

J. Gasser, B. Kubis, N. Paver +1

Motivated by recent experimental results and ongoing measurements, we review the chiral perturbation theory prediction for radiative Ke3 decays (neutral kaons). Special emphasis is…

hep-ph2004★ 64 cited

Wilson Lines in Warped Space: Dynamical Symmetry Breaking and Restoration

Kin-ya Oda, Andreas Weiler

The dynamics of Wilson lines integrated along a warped extra dimension has been unknown. We study a five dimensional SU(N) pure gauge theory with Randall-Sundrum warped compactific…

cond-mat.dis-nn2004★ 42 cited

Theory of light diffusion in disordered media with linear absorption or gain

A. Lubatsch, J. Kroha, K. Busch

We present a detailed, microscopic transport theory for light in strongly scattering disordered systems whose constituent materials exhibit linear absorption or gain. Starting from…

astro-ph2004★ 21 cited

GaBoDS: The Garching-Bonn Deep Survey - III. Lyman-Break Galaxies in the Chandra Deep Field South

H. Hildebrandt, D. J. Bomans, T. Erben +10

We present first results of our search for high-redshift galaxies in deep CCD mosaic images. As a pilot study for a larger survey, very deep images of the Chandra Deep Field South…

hep-ph2004★ 132 cited

Near threshold enhancement of the ppbar mass spectrum in J/Psi decay

A. Sibirtsev, J. Haidenbauer, S. Krewald +2

We investigate the nature of the near-threshold enhancement in the ppbar invariant mass spectrum of the reaction J/Psi -> gamma ppbar reported recently by the BES Collaboration. Us…

hep-ex2004★ 12 cited

A Search for Anomalous Heavy-Flavor Quark Production in Association with W Bosons

D0 Collaboration, V. M. Abazov

We present a search for anomalous production of heavy-flavor quark jets in association with a W boson at the Fermilab Tevatron ppbar Collider. This search is conducted through an e…

astro-ph2004

How star clusters could survive low star formation efficiencies

M. Fellhauer, P. Kroupa

After the stars of a new, embedded star cluster have formed they blow the remaining gas out of the cluster. Especially winds of high mass stars and definitely the on-set of the fir…