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The time delay experiment proposed by I.I. Shapiro in 1964 and conducted in the seventies was the most precise experiment
of general relativity until that time. Further experimentation has improved the accuracy level of both the time delay and
the light deflection experiments. A simulation model is proposed that involves only a simple mass and time transformation
factor involving velocity of light. The light deflection and the time delay experiments are numerically simulated using this
model that does not use the general relativistic equations. The computed values presented in this paper compare well with
recent levels of accuracy of their respective experimental results. 相似文献
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S. J. Lindenbaum R. S. Longacre M. Kramer 《The European Physical Journal C - Particles and Fields》2003,30(2):241-253
Since the early eighties, we have shared with van Hove the following view: If a quark-gluon plasma were produced in high energy heavy ion colliders, then its hadronization products would likely come from small bubbles of plasma localized in phase space. We develop a model based on HIJING, to which we added a ring of adjoining multiple bubbles in the central rapidity region. Our simulations were designed to be tested by the forthcoming RHIC STAR detector data for 65 GeV/n Au colliding with 65 GeV/n Au. We took into account background and resonance effects to allow a direct comparison to be made with the data. Later 100 GeV/n Au colliding with 100 GeV/n Au and LHC data could also test these ideas. We used two charged particle correlations as a sensitive method to test for bubbles.Received: 18 December 2002, Revised: 17 April 2003, Published online: 1 August 2003S.J. Lindenbaum, M. Kramer: This research was supported by the U.S. Department of Energy under Contract No. DE-AC02-98CH10886 and the City College of New York Physics Department 相似文献
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We present two new variants of Schur complement domain decompositionpreconditioners suitable for 2D anisotropic problems. Thesevariants are based on adaptations of the probing idea, describedby Chan et al (1992 Fifth Int. Symp. on Domain DecompositionMethods for Partial Differential Equations, Philadelphia: SIAM,pp 236-249), used in conjunction with a coarse grid approximationas introduced by Bramble et al (1986 Math. Comput. 47, 103-134).The new methods are specifically designed for situations wherethe coupling between neighbouring interfaces is stronger thanthe coupling within an interface. Taking into account this strongcoupling, one variant uses a multicolour probing technique toavoid distortion in the probe approximations that appear whenusing the method proposed by Chan et al. The second techniqueuses additional probe matrices to approximate not only the couplingwithin the interfaces but also the coupling between interfacepoints across the subdomains. This latter procedure looks somewhatlike an alternating line relaxation method for anisotropic problems,see Brandt (1977 Math. Comput.. 31, 333-390). To assess therelevance of the new preconditioners, we compare their numericalbehaviour with well known robust preconditioners such as thebalanced Neumann-Neumann method proposed by Mandel (1993 Commun.Numer. Methods Eng.. 9, 233-241). 相似文献
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R.S. Longacre A.H. Rosenfeld T. Lasinski G. Smadja R.J. Cashmore D.W.G.S. Leith 《Physics letters. [Part B]》1975,55(4):415-419
From a partial wave analysis of the reaction πN→ππN we extract 50 cuoplings and partial widths for N* resonance decaying into Δπ, ?N and εN. Three different methods of determining the resonance parameters are compared. The signs of the πΔ couplings are found to be consistent with the predictions of l-broken SU(6)w, if one assigns P′11(1415), P″11(1730) and P33(1700) to [56, L=0+] supermultiplets. The signs of the ?N couplings are inconsistent with SU(6)w symmetry in its l-broken form, but in good agreement with the observed photon couplings. 相似文献
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Albergo S Bellwied R Bennett M Boemi D Bonner B Caines H Christie W Costa S Crawford HJ Cronqvist M Debbe R Engelage J Flores I Greiner L Hallman T Hijazi G Hoffmann G Huang HZ Humanic TJ Insolia A Jensen P Judd EG Kainz K Kaplan M Kelly S Kotov I Kunde G Lindstrom PJ Ljubicic T Llope W LoCurto G Longacre R Lynn D Madansky L Mahzeh N Milosevich Z Mitchell JM Mitchell JW Nehmeh S Nociforo C Paganis S Pandey SU Potenza R Russ DE Saulys A Schambach J Sheen J Sugarbaker E Takahashi J Tang J 《Physical review letters》2002,88(6):062301
E896 has measured Lambda production in 11.6A GeV/c Au-Au collisions over virtually the whole rapidity phase space. The midrapidity p(t) distributions have been measured for the first time at this energy and appear to indicate that the Lambda hyperons have different freeze-out conditions than protons. A comparison with the relativistic quantum molecular dynamics model shows that while there is good shape agreement at high rapidity the model predicts significantly different slopes of the m(t) spectra at midrapidity. The data, where overlap occurs, are consistent with previously reported measurements. 相似文献
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The ‘anomalous perihelion precession’ of Mercury, announced by Le Verrier in 1859, was a highly controversial topic for more
than half a century and invoked many alternative theories until 1916, when Einstein presented his theory of general relativity
as an alternative theory of gravitation and showed perihelion precession to be one of its potential manifestations. As perihelion
precession was a directly derived result of the full General Theory and not just the Equivalence Principle, Einstein viewed
it as the most critical test of his theory. This paper presents the computed value of the anomalous perihelion precession
of Mercury's orbit using a new relativistic simulation model that employs a simple transformation factor for mass and time,
proposed in an earlier paper. This computed value compares well with the prediction of general relativity and is, also, in
complete agreement with the observed value within its range of uncertainty. No general relativistic equations have been used
for computing the results presented in this paper. 相似文献
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Rath MG Cason NM Bensinger JR Bishop JM Biswas NN Busenitz JK Etkin A Foley KJ Fortner MR Fortney LR Goo J Kenney VP Kirsch LE Kramer MA Lindenbaum SJ Longacre RS Love WA McCrory E Morris TW Piekarz H Piekarz J Platner ED Poster RA Ruchti RC Saulys AC Shephard WD Zogrofou P 《Physical review D: Particles and fields》1989,40(3):693-705