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79 papers · 1 filter
On the rank of a binary form
Gonzalo Comas, Malena Seiguer
We describe in the space of binary forms of degree d the strata of forms having constant rank. We also give a simple algorithm to determine the rank of a given form.
Dimming of Supernovae by Photon-Pseudoscalar Conversion and the Intergalactic Plasma
Cédric Deffayet, Diego Harari, Jean-Philippe Uzan +1
Recently Csaki, Kaloper and Terning (hep-ph/0111311) suggested that the observed dimming of distant type Ia supernovae may be a consequence of mixing of the photons with very light…
Cosmic String Signatures in the Cosmic Microwave Background Anisotropies
Alejandro Gangui, Levon Pogosian, Serge Winitzki
We briefly review certain aspects of cosmic microwave background anisotropies as generated in passive and active models of structure formation. We then focus on cosmic strings base…
Deparametrization and quantization of the Taub universe
Gaston Giribet, Claudio Simeone
Previous analysis about the deparametrization and path integral quantization of cosmological models are extended to models which do not admit an intrinsic time. The formal expressi…
Search for R-parity Violating Supersymmetry in Dimuon and Four-Jets Channel
D0 collaboration, V. M. Abazov etal
We present results of a search for R-parity-violating decay of the neutralino chi_1^0, taken to be the Lightest Supersymmetric Particle. It is assumed that this decay proceeds thro…
Search for Leptoquark Pairs Decaying to neutrino neutrino + jets in p anti-p Collisions at s**(1/2)=1.8 TeV
D0 Collaboration, V. M. Abazov
We present the results of a search for leptoquark (LQ) pairs in (85.2 +- 3.7) pb^{-1} of p anti-p collider data collected by the D0 experiment at the Fermilab Tevatron. We observe…