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Measurement of elastic electroproduction of phi mesons at HERA
- Source :
- Physics Letters B, Physics Letters B, 2000, 483, pp.360-372, ResearcherID, Physics letters: B, Physics Letters B, Elsevier, 2000, 483, pp.360-372
- Publication Year :
- 2000
-
Abstract
- The elastic electroproduction of phi mesons is studied at HERA with the H1 detector for photon virtualities 1 < Q^2 < 15 GeV^2 and hadronic centre of mass energies 40 < W < 130 GeV. The Q^2 and t dependences of the cross section are extracted (t being the square of the four-momentum transfer to the target proton). When plotted as function of (Q^2 + M_V^2) and scaled by the appropriate SU(5) quark charge factor, the phi meson cross section agrees within errors with the cross sections of the vector mesons V = rho, omega and J/psi. A detailed analysis is performed of the phi meson polarisation state and the ratio of the production cross sections for longitudinally and transversely polarised phi mesons is determined. A small but significant violation of s-channel helicity conservation (SCHC) is observed.<br />17 pages, 7 figures and 2 tables
- Subjects :
- Physics
Quark
Nuclear and High Energy Physics
Particle physics
Proton
Meson
010308 nuclear & particles physics
Hadron
Nuclear Theory
High Energy Physics::Phenomenology
FOS: Physical sciences
HERA
Phi meson
01 natural sciences
7. Clean energy
Helicity
Omega
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
High Energy Physics::Experiment
010306 general physics
Nuclear Experiment
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 483
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- PHYSICS LETTERS B
- Accession number :
- edsair.doi.dedup.....856b089128fe9868ef30609df2cb4b6b