Zobrazeno 1 - 10
of 479
pro vyhledávání: '"Swain, J D."'
Despite the fact that red blood cells carry negative charges, under certain conditions they form cylindrical stacks, or ``rouleaux''. It is shown here that a form of the Casimir effect, generalizing the more well-known van der Waals forces, can provi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412725
Despite many efforts to find a reasonable explanation, the origin of the "knee" in the cosmic ray spectrum at energy around 10**15.5 eV remains mysterious. In this letter we suggest that the "knee" may be due to a GZK-like effect of cosmic rays inter
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112191
Autor:
Anchordoqui, L. A., Cook, J., Gabour, M., Kirsch, N., MacLeod, J., McCauley, T. P., Musienko, Y., Paul, T. C., Reucroft, S., Swain, J. D., Terry, R.
We report on our studies of applying novel detector technologies developed for LHC-era experiments to cosmic ray detection. In particular, we are investigating usage of scintillating tiles with embedded wavelength-shifting fibers and avalanche photod
Externí odkaz:
http://arxiv.org/abs/hep-ex/0106002
Publikováno v:
Phys.Lett. B492 (2000) 237-244
A re-examination of the atmospheric cascade profile of the highest energy cosmic ray is presented. The study includes air-shower simulations considering different cross sections, particle multiplicity and variation of the hadronic-event-generator to
Externí odkaz:
http://arxiv.org/abs/astro-ph/0007403
Publikováno v:
Nucl.Phys.Proc.Suppl.97:199-202,2001
We study the self-similar structure of electromagnetic showers and introduce the notion of the fractal dimension of a shower. Studies underway of showers in various materials and at various energies are presented, and the range over which the fractal
Externí odkaz:
http://arxiv.org/abs/hep-ph/0006108
Autor:
Alverson, G., Anchordoqui, L. A., Cooperman, G., Grinberg, V., McCauley, T. P., Paul, T., Reucroft, S., Swain, J. D.
Publikováno v:
Nucl.Phys.Proc.Suppl.97:193-195,2001
{\sc top-c} (Task Oriented Parallel C) is a freely available package for parallel computing. It is designed to be easy to learn and to have good tolerance for the high latencies that are common in commodity networks of computers. It has been successf
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006154
Autor:
Anchordoqui, L. A., Cooperman, G., Grinberg, V., McCauley, T. P., Paul, T., Reucroft, S., Swain, J. D., Alverson, G.
We present an evaluation of a simulated cosmic ray shower, based on {\sc geant4} and {\sc top-c}, which tracks all the particles in the shower. {\sc top-c} (Task Oriented Parallel C) provides a framework for parallel algorithm development which makes
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006141
Publikováno v:
Nucl.Phys.Proc.Suppl.97:196-198,2001
We present a detailed simulation of the performance of water Cerenkov detectors suitable for use in the Pierre Auger Observatory. Using {\sc geant4}, a flexible object-oriented simulation program, including all known physics processes, has been devel
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006142
Publikováno v:
Nucl.Phys.Proc.Suppl.97:203-206,2001
We critically review the common belief that ultrahigh energy cosmic rays are protons or atomic nuclei with masses not exceeding that of iron. We find that heavier nuclei are indeed possible, and discuss possible sources and acceleration mechanisms fo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006071
Publikováno v:
Phys.Lett.B482:343-348,2000
A re-examination of the energy cosmic ray spectrum above $10^{20}$ eV is presented. The overall data-base provides evidence, albeit still statistically limited, that non-nucleon primaries could be present at the end of the spectrum. In particular, th
Externí odkaz:
http://arxiv.org/abs/astro-ph/9912081