45 research outputs found
Alicia Durrant.
48-1Invalid PensionsReport : Petition of A. Durrant. [2254] Service in Modoc war in Oregon.1884-8
Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p)
The missing mass spectrum measured in high resolution studies of the reaction
pp -> K^+X is analyzed with respect to the strong final state interaction near
the Lambda p production threshold. The observed spectrum can be described by
factorizing the reaction amplitude in terms of a production amplitude and a
final state scattering amplitude. Parametrizing the Lambda p final state
interaction in terms of the inverse Jost function allows a direct extraction of
the low-energy phase-equivalent potential parameters. Constraints on the
singlet and triplet scattering lengths and effective ranges are deduced in a
simultaneous fit of the Lambda p invariant mass spectrum and the total cross
section data of the free Lambda p scattering using the effective range
approximation.Comment: 9 pages,6 figures, 2 table
Isospin Breaking in Decays III: Bremsstrahlung and Fit to Experiment
We complete here our work on isospin violation in the system. We
first calculate to the same order as we did in papers I
and II of this series. This adds effects of order and
to earlier work. We calculate also the lowest order
Bremsstrahlung contributions, . With these and our
earlier results we perform a full fit to all available CP conserving data in
the system including isospin violation effects. We perform
these fits under various input assumptions as well as test the factorization
and the vector dominance model for the weak NLO low energy constants.Comment: 11 page
The Pierre Auger Cosmic Ray Observatory
The Pierre Auger Observatory, located on a vast, high plain in western Argentina, is the world's largest cosmic ray observatory. The objectives of the Observatory are to probe the origin and characteristics of cosmic rays above eV and to study the interactions of these, the most energetic particles observed in nature. The Auger design features an array of 1660 water-Cherenkov particle detector stations spread over 3000 km overlooked by 24 air fluorescence telescopes. In addition, three high elevation fluorescence telescopes overlook a 23.5 km, 61-detector infilled array with 750 m spacing. The Observatory has been in successful operation since completion in 2008 and has recorded data from an exposure exceeding 40,000 km sr yr. This paper describes the design and performance of the detectors, related subsystems and infrastructure that make up the Auger Observatory.Peer Reviewe