Measurement of the e{sup +}e{sup –} → ηπ{sup +}π{sup –} cross section in the center-of-mass energy range 1.22–2.00 GeV with the SND detector at the VEPP-2000 collider

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778815130323· OSTI ID:22471860

Shtol, D. A., E-mail: [e-mail] ^[1]

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1. Russian Academy of Sciences, Budker Institute of Nuclear Physics, Siberian Branch (Russian Federation)

In the experiment with the SND detector at the VEPP-2000 e+e– collider the cross section for the process e{sup +}e{sup –} → ηπ{sup +}π{sup –} has been measured in the center-of-mass energy range from 1.22 to 2.00 GeV. Obtained results are in agreement with previous measurements and have better accuracy. The energy dependence of the e{sup +}e{sup –} → ηπ{sup +}π{sup –} cross section has been fitted with the vector-meson dominance model. From this fit the product of the branching fractions B(ρ(1450) → ηπ{sup +}π{sup –})B(ρ(1450) → π{sup +}π{sup –}) has been extracted and compared with the same products for (ρ(1450) → ωΠ{sup 0} and (ρ(1450) → π{sup +}π{sup –} decays. The obtained cross section data have been also used to test the conservation of vector current hypothesis.

• OSTI ID: 22471860
• Journal Information: Physics of Atomic Nuclei, Vol. 78, Issue 13; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
COMPARATIVE EVALUATIONS
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
ENERGY DEPENDENCE
ETA MESONS
GEV RANGE
HYPOTHESIS
OMEGA-782 MESONS
PARTICLE DECAY
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
RHO-1450 MESONS
VECTOR CURRENTS
VECTOR DOMINANCE MODEL
VEPP-2