Spin Density Matrix Elements from {rho}{sup 0} and {phi} Meson Electroproduction at HERMES

Journal Article · Mon Mar 23 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3122173· OSTI ID:21293436

Borissov, A ^[1]

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1. DESY, D-22607 Hamburg (Germany)

Exclusive production of {rho}{sup 0} and {phi} mesons on hydrogen and deuterium targets is studied in the HERMES kinematic region 1<Q{sup 2}<7 GeV{sup 2} and 3.0<W<6.3 GeV. Spin density matrix elements are presented. Violation of s-Channel Helicity Conservation is observed through several non-zero values of SDMEs for {rho}{sup 0}, but not for {phi}. In exclusive {rho}{sup 0} production on the proton an indication is observed of a contribution of unnatural-parity exchange amplitudes, for which the dependence on Q{sup 2} and t' is shown.

• OSTI ID: 21293436
• Journal Information: AIP Conference Proceedings, Vol. 1105, Issue 1; Conference: DIFFRACTION 2008: International workshop on diffraction in high energy physics, La Londe-les-Maures (France), 9-14 Sep 2008; Other Information: DOI: 10.1063/1.3122173; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DENSITY MATRIX
DEUTERIUM TARGET
ELECTROPRODUCTION
EXCLUSIVE INTERACTIONS
FOUR MOMENTUM TRANSFER
GEV RANGE
HELICITY
HERA STORAGE RING
HYDROGEN 1 TARGET
MESONS
MULTIPARTICLE SPECTROMETERS
PARITY
PARTICLE IDENTIFICATION
PHI MESONS
PROTONS
RHO-770 MESONS
S CHANNEL
SPIN