1,419 research outputs found
Hypernuclear physics legacy and heritage of Dick Dalitz
The major contributions of Richard H. Dalitz to hypernuclear physics, since
his first paper in 1955 to his last one in 2005 covering a span of 50 years
during which he founded and led the theoretical study of hypernuclei, are
reviewed from a personal perspective. Topical remarks on the search for
quasi-bound antikaon-nuclear states and on kaon condensation are made.Comment: prepared for NPA vol. 804 (2008), Recent Advances in Strangeness
Nuclear Physics, edited by A. Gal and R.S. Hayano; a preliminary version
appeared in the proceedings of HYP0
Boltzmann Collision Kernels and Velocity Saturation in Semiconductors
For different models of the electron-phonon interaction, the asymptotic
behaviour of the moments of the stationary homogeneous solution of the linear
Boltzmann equation is determined in the limit of a high external field. For
Hilbert-Schmidt kernels of a finite rank, a result recently proven for kernels
of rank one is found generally valid; as a consequence velocity saturation is
excluded for these collision models. For a class of singular collision kernels
in contrast, velocity saturation is generally obtained.Comment: 12 pages in LaTex, no figure, submitted to Physica
Top Quark Measurements at the Fermilab Tevatron
The top quark, discovered at the Tevatron in 1995, is a very interesting
particle. Precise measurement of the top properties using large data samples
will allow stringent tests of the Standard Model and offer a unique window on
new physics. In this report will be reviewed the status of the current
knowledge of the top quark as provided by the Run I results of the CDF and D0
experiment. A first look at various preliminary measurements obtained with data
collected during Run II will be also presented.Comment: 10 pages, 14 figures Proceeding of Lepton-Photon 2003, Fermilab
Batavia (IL), August 200
On the scattering length of the K^- d system
Multiple-scattering approximations to Faddeev calculations of the K^- d
scattering length are reviewed and compared with published Kbar-N-N pi-Y-N
fully reactive Faddeev calculations. A new multiple-scattering approximation
which goes beyond the `fixed-center' assumption for the nucleons is proposed,
aiming at accuracies of 5-10%. A precise value of the K^- d scattering length
from the measurement of the K^- d 1s atomic level shift and width, planned by
the DEAR/SIDDHARTA collaboration, plus a precise value for the K^- p scattering
length by improving the K^- p atom measurements, are essential for extracting
the K^- n scattering length, for resolving persistent puzzles in low-energy
Kbar-N phenomenology and for extrapolating into Kbar-nuclear systems.Comment: Invited talk at MESON 2006, Krakow, June 2006. To be published in
International Journal of Modern Physics A. Requires use of ws-ijmpa.cl
On Measuring the top quark mass using the dilepton decay modes
We demonstrate a new likelihood method for extracting the top quark mass from
events of the type ttbar-->bW(l+nu)bW(l+nu) This method estimates the top quark
mass correctly from an ensemble of dilepton events. The method proposed by
Dalitz and Goldstein [1] is shown to result in a systematic underestimation of
the top quark mass. Effects due to the spin correlations between the top and
anti-top quarks are shown to be unimportant in estimating the mass of the top
quark.Comment: To appear in the proceedings of the 1996 DPF/DPB study on new
directions for High Energy Physics, Snowmass, Colorad
An Investigation of the Ethnography of Knowledge through an Organisational Ethnography of ActewAGL
This thesis develops and empirically tests the method of the Ethnography of Knowledge in the context of an ethnographic study of the Logistics Branch of ActewAGL, an Australian multi-utility company. ¶ The study is based on fieldwork undertaken over an eight and a half month period of participant observation and uses a grounded style of analysis. ¶ ..
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