منابع مشابه
A New Slant on Hadron Structure
Rather than regarding the restriction of current lattice QCD simulations to quark masses that are 5–10 times larger than those observed, we note that this presents a wonderful opportunity to deepen our understanding of QCD. Just as it has been possible to learn a great deal about QCD by treating Nc as a variable, so the study of hadron properties as a function of quark mass is leading us to a m...
متن کاملNew slant on tilted cosmology.
In a recent paper by Coley and Mc Manus @1#, spacetimes admitting a shear-free, irrotational, and geodesic ~SIG! timelike congruence were studied. Moreover, ~single! perfect fluid spacetimes in which the fluid four-velocity is tilting relative to the SIG timelike congruence ~which we shall refer to here as tilting SIG models! were investigated; in particular, it was shown that such spacetimes a...
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The best case for thinking that quantum mechanics is nonlocal rests on Bell’s Theorem, and later results of the same kind. However, the correlations characteristic of EPR-Bell (EPRB) experiments also arise in familiar cases elsewhere in QM, where the two measurements involved are timelike rather than spacelike separated; and in which the correlations are usually assumed to have a local causal e...
متن کاملHadron interactions and hadron structure
It was rst pointed out by Drell & Yan (1970) that parton model ideas developed for deep-inelastic scattering could be extended to certain processes in hadron{hadron collisions. The paradigm process, proposed by Drell & Yan, was the production of a massive lepton pair by quark{antiquark annihilation: the Drell{Yan process (illustrated in gure 1). For the production of a lepton pair of invari...
متن کاملNew slant on photonic crystal fibers
We present the novel use of microstructured optical fibers not as “light-pipes”, but in a transverse geometry to manipulate the light propagating across the fiber. Fundamental and higher-order bandgaps were observed experimentally in this geometry using a number of techniques. The comparison of the measured spectra with photonic band structure and Finite-Difference Time-Domain simulations provi...
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ژورنال
عنوان ژورنال: Pramana
سال: 2001
ISSN: 0304-4289,0973-7111
DOI: 10.1007/s12043-001-0036-6