We present evidence for leading particle production in hadronic decays of the Z 0 boson to light-avor jets. A polarized electron beam was used to tag quark and antiquark jets, and a vertex detector was employed to reject heavy-avor events. Charged hadrons were identiied with a Cherenkov ring imaging detector. In the quark jets, more high-momentum p, , K , , and K 0 were observed than their anti...

The spatial and spectral properties of three-dimensional photonic jets are studied in a framework employing rigorous Lorentz-Mie theory. The contributions to the field from each spectral component are studied quantitatively and highlight the distinctive features of photonic jets. In particular, the role of evanescent field in photonic jets generated by small spheres is investigated. Secondary l...

Three jets events in the ee collisions at 91.2 GeV are investigated using both HERWIG and JETSET Monte Carlo generators. The angles between the three jets are used to identify the quark and gluon jets. The analysis at parton level is done to ensure the reasonableness of this method and an angular cut is ultilized to improve the purity of this identification. The multiplicity inside the identifi...

Direct numerical simulations have been performed to study the behaviour of multiple square jets issuing normally into a cross-flow. The jets are arranged side-by-side in spanwise direction in twin jet configuration and with addition third jet downstream along the centre line in tandem jets configuration. The simulations are carried out for the jet-to-jet adjacent edge distances of 1D and 2D in ...

We study the dynamics of a cavitation bubble near beds sand different grain sizes. use high-speed imaging to observe motion and for values stand-off parameter $\gamma$ (dimensionless bubble-boundary distance) between 0.3 5.3. Compared with rigid boundary, we find that granular boundary leads bubbles shorter lifetimes reduced centroid displacements. Above $\gamma \approx 1.3$ , behaviour is almo...

BACKGROUND In clinical color Doppler examinations, mitral regurgitant jets are often observed to impinge on the left atrial wall immediately beyond the mitral valve. In accordance with fluid dynamics theory, we hypothesized that a jet impinging on a wall would lose momentum more rapidly, undergo spatial distortion, and thus have a different observed jet area from that of a free jet with an iden...

The hot, puffed up, post-shock region of an advective disc is the source of high energy photons and also the jets and outflows. We study the relativistic equations of motion of jets as these high energy photons interact with them. We show that the much discussed terminal velocity of jets depends on the comparative value of radiative energy density, flux and the radiative pressure. We show that ...

xv

2) The new physics yields a-large number of jets containing ordinary light hardrons. If one ignores light hardron masses, the situation looks like Tp, n physics at SPEAR energies with hadronic jets from Z", W replacing y's from @, n. By analogy it is expected that the reconstruction of Z", W from pairs of jets would be very useful in understanding events in the TeV region. In Appendix A we disc...

A criterion for finding a configuration of jets for a given multiparticle event: • is derived uniquely from minimum formal input; • guarantees minimal distortion of physical information in the transition from particles to jets; • is optimally stable with respect to data errors; • does not restrict geometric shape of jets; • allows jets to share particles; • amounts to finding a matrix via minim...