29 citations · 74 across the 12 of their papers we have counts for
6 papers · 1 filter
Classical and quantum constraints in spin physics
X. Artru
Constraints on spin observables coming from discrete symmetries such as P, C, T and identical particles may be divided in two types: 1) classical ones, which insure the invariance…
Impact parameter profile of synchrotron radiation
X. Artru
The horizontal impact parameter profile of synchrotron radiation, for fixed vertical angle of the photon, is calculated. This profile is observed through an astigmatic optical syst…
Angular distribution of radiation by relativistic electrons in a thin crystal
X. Artru, S. P. Fomin, N. F. Shul'ga
The results of theoretical investigation of angular distributions of radiation from a relativistic electron passing through a thin crystal at a small angle to the crystal axis are…
General Constraints on Spin Observables, Applications to Antiproton Proton to Antilambda Lambda and to Polarized Quark Distributions
Xavier ARTRU, Jean-Marc RICHARD
We review the density matrix formalism and the positivity conditions for general multiple spin asymmetries, taking as an example the case antiproton + proton -> antiLambda + Lambda…
Some aspects of transversity
X. Artru
The specificities of transverse polarization with respect to helicity of ultrarelativistic fermions are pointed out. For massless fermions, a covariant transversity four-vector is…
Proposals for measuring transversity distributions in deep inelastic electron scattering and a model for E-704 asymmetries
X. Artru
We present the principles of the measurement of the quark transversity distributions in semi-inclusive deep inelastic electron scattering, which form the basis of HELP and one of t…