We argue that the massive Yang-Mills model of Kunimasa & Goto, Slavnov, and Cornwall, in which massive gauge vector bosons are introduced in a gauge-invariant way without resorting to the Higgs mechanism, may be useful for studying diffractive scattering of strongly interacting particles. With this motivation, we perform in this model explicit calculations of S-matrix elements between quark sta...

We calculate the production of high-energy photons from Compton scattering and annihilation of a quark jet passing through a quark gluon plasma produced in a relativistic heavy ion collision. The contributions are large and reflect the momentum distribution of the jets and the initial conditions of the plasma.

It is shown that the recent HERMES data on the transverse Λ polarization in the inclusive quasi-real photoproduction at xF > 0 can be accommodated by the strange quark scattering model. Relations with the quark recombination approach are discussed. PACS. 13.60.-r – 13.88.+e

We show that, independently of the size of the quark condensate, chiral symmetry correlates the two S-wave pipi scattering lengths. In view of this constraint, the new precision data on K(e(4)) decay allow a remarkably accurate determination of these quantities. The result confirms the hypothesis that the quark condensate is the leading order parameter.

We argue that the massive Yang-Mills model of Kunimasa and Goto, Slavnov, and Cornwall, in which massive gauge vector bosons are introduced in a gauge-invariant way without resorting to the Higgs mechanism, may be useful for studying diffractive scattering of strongly interacting particles. With this motivation, we perform in this model explicit calculations of S-matrix elements between quark s...

The 2-quark back-angle scattering mechanism is shown to reproduce main features of high-energy hh flavor-exchange reactions. Prospects for reduction of the reaction matrix element to a form of convolution of hadron wave functions with the hard scattering kernel are discussed. Wave function models suitable for convolution with the kernel, which is singular at small x, and the emerging form-facto...

This paper presents an overview of the physics program of the 15-30 GeV continuous beam electron facility proposed by the European community of nuclear physicists to study the quark and gluon structure of hadrons. The goal of this new facility is to explore the quark structure of matter by exclusive and semi-inclusive electron scattering from nuclear targets.

We studied the high energy quark anti-quark elastic scattering with an exchange of a mesonic state in the t channel with −t/Λ 2 QCD 1. Two methods are proposed to eliminate the strong background from bare pomeron, reggized gluon and odderon exchange. The feasibility of measuring mesonic reggeon exchange is discussed.

Described here is the study of lambda-b polarization in the LHC-ATLAS experiment I have done with Prof. Homer Neal this summer. Our work has three main focuses, including predicting lambda polarization from quark-quark scattering models applied to p-p elastic collisions, modeling lambda polarization saturation, and simulating lambda-b events and polarization measurements in ATLAS using the λ0J/...

This research summarizes work done by myself (Nucl.Phys.A641 (1998)461), or in collaboration with R. M. Davidson (Phys.Lett.B348(1995)163) and H. Weigel and L. Gamberg (Nucl.Phys.B560(1999)xx). I will discuss several topics related with the computation of structure functions in the quark model in general and its perturbative evolution. In particular, I address this topic in the Nambu–Jona–Lasin...