Correlations in large pTp_{T} processes in parton models

We calculate the two-particle distribution and the associated multiplicity for large $p_{T}$ region in the framework of the parton models. We find that it is possible to construct a model being able to fit quite well a large amount of data on the two-particle level. The model should possess the following properties: a) the hard scattering cross-section should be independent of energy at fixed $p_{T}$, b) both quasi-exclusive (single-jet) and inclusive (double-jet) components must be present with the cross-section for the double-jet process at least one order of magnitude larger than that for the single-jet process, c) the mean transverse momentum in the jet fragmentation should be of the order of 630 MeV, d) the jet structure function should be damped like (1 - x)$^{2}$ for x $\to$ 1

Single-particle inclusive distribution at large pT_{T} in parton models

The predictions of parton models for the single-particle distribution in the large p$_{T}$ region are analysed. An explicit expression for the slope B in the formula $E\frac{d\sigma }{d^{3}p}=\frac{c}{p_{T}^{N}}e^{-Bx_{T}}$ is derived. It is shown that the weak rapidity dependence of B, observed at ISR implies the hard scattering cross-section $\frac{d\sigma }{dt}$ to be approximately independent of energy at fixed p$_{T}$

Rodzice–szkoła i szkoła–rodzice: wzajemne oczekiwania

Artykuł z numeru 1/2012 internetowego czasopisma edukacyjnego ORE "Trendy