Polarization effects in the reaction e{sup +}+e{sup -}{yields}{rho}{sup +}+{rho}{sup -} and determination of the {rho}-meson form factors in the time-like region

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.065202· OSTI ID:21003497

Adamuscin, C; Gakh, G I; Tomasi-Gustafsson, E ^[1]

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1. DAPNIA/SPhN, CEA/Saclay, F-91191 Gif-sur-Yvette Cedex (France)

The electron positron annihilation reaction into four-pion production has been studied, through the channel e{sup +}+e{sup -}{yields}{rho}+{rho}. The differential (and total) cross sections and various polarization observables for this reaction have been calculated in terms of the electromagnetic form factors of the corresponding {gamma}*{rho}{rho} current. The elements of the spin-density matrix of the {rho} meson were also calculated. Numerical estimations have been done, with the help of phenomenological form factors obtained in the spacelike region of the momentum transfer squared and analytically extended to the timelike region.

• OSTI ID: 21003497
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DENSITY MATRIX
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC FORM FACTORS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
MESONS
MOMENTUM TRANSFER
PARTICLE PRODUCTION
POLARIZATION
SPIN
TOTAL CROSS SECTIONS