HEPData Search

The φπ + /ωπ + ratio from n¯p annihilations on a liquid hydrogen target, for n¯ momenta between 64 and 297 MeV/ c , was measured using the OBELIX spectrometer at LEAR. The ratio R(ϕπ/ωπ)=σ(n¯p→ϕπ+)/σ(n¯p→ωπ+) turned out 0.110±0.015 stat ±0.006 syst . Implications of this result on the OZI rule are discussed.

1 data table

Table 1

Assumes branching ratios of (49.1 +- 0.8)% for phi --> K+ K- and (88.8 +- 0.6)% for omega --> pi+ pi- pi0.

Production of $K \bar{K}$ Pairs in Photon-photon Collisions and the Excitation of the Tensor Meson F-prime (1515)

The TASSO collaboration Althoff, M. ; Brandelik, R. ; Braunschweig, W. ; et al.

Phys.Lett.B 121 (1983) 216-222, 1983.

Inspire Record 181468 DOI 10.17182/hepdata.30814

We have observed exclusive production of K + K − and K S O K S O pairs and the excitation of the f′(1515) tensor meson in photon-photon collisions. Assuming the f′ to be production in a helicity 2 state, we determine Λ( f ′ → γγ) B( f ′ → K K ) = 0.11 ± 0.02 ± 0.04 keV . The non-strange quark of the f′ is found to be less than 3% (95% CL). For the θ(1640) we derive an upper limit for the product Λ(θ rarr; γγ K K ) < 0.03 keV (95% CL ) .

2 data tables

Table 1

Data read from graph.. Errors are the square roots of the number of events.

Table 2

Data read from graph.. Errors are the square roots of the number of events.

Date

Collaboration

Subject_areas

Phrases

Reactions

Observables

CM Energies (GeV) Reset

Authors Reset

Determination of Nucleon and Pion Form-factors by Analyzing the $\pi^- p \to e^+ e^- \pi$ Reaction at E ($\pi$) = 164-{MeV}

MEASUREMENT OF DIFFERENTIAL CROSS-SECTIONS FOR INVERSE PION ELECTROPRODUCTION (PI- P ---> E+ E- N) AT THE PION ENERGY E = 164-MEV. (IN RUSSIAN)

OBSERVATION OF INVERSE ELECTROPRODUCTION OF PIONS ON C-12 NUCLEUS AT 164-MeV PION ENERGY AND DETERMINATION OF F1(v) NUCLEON FORM-FACTOR

Phi and omega meson production in anti-n p annihilation and the OZI rule

Production of $K \bar{K}$ Pairs in Photon-photon Collisions and the Excitation of the Tensor Meson F-prime (1515)