Inclusive reaction e/sup +/e/sup -/. -->. VX with allowance for the polarization states of the produced vector meson

Journal Article · Thu Dec 01 04:00:00 EST 1977 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6948320

Khachatryan, G N; Shakhnazaryan, Y G

A study is made of the inclusive process e/sup +/e/sup -/..-->..VX with allowance for the polarization states of the vector meson. A tensor describing the vertex for the transition ..gamma..*..-->..VX, containing in general eight structure functions, is constructed. The helicity representation is used to calculate the elements of the density matrix for the produced vector meson, which are expressed in terms of these structure functions and the polarization vectors of the annihilating particles. It is shown that only six structure functions can be determined by studying the angular distribution of the products of the decay of the vector meson into pseudoscalar particles (rho..-->..2..pi.., ..omega.. ..-->..3..pi.., phi..-->..2K), since the polarization vector of the vecton does not contribute to these decays. A determination is also made of the angular distribution of the longitudinally polarized leptons in the decay V..-->..1/sup +/1/sup -/ (psi, psi'..-->..1/sup +/1/sup -/), from which it follows that all the structure functions can be distinguished in this case. To do this, it is necessary that the polarization vectors of the annihilating electron or positron have a longitudinal component and that the longitudinal polarization of at least one of the decay leptons is measured.

• Research Organization: Erevan Physics Institute
• OSTI ID: 6948320
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 26:6; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
BASIC INTERACTIONS
BOSONS
COLLISIONS
DECAY
DENSITY MATRIX
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON COLLISIONS
ELECTRON-POSITRON COLLISIONS
ELEMENTARY PARTICLES
FUNCTIONS
HADRONIC PARTICLE DECAY
HADRONS
HELICITY
INTERACTIONS
MATRICES
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
POLARIZATION
POLARIZED PRODUCTS
POSITRON COLLISIONS
RESONANCE PARTICLES
STRUCTURE FUNCTIONS
VECTOR MESONS