Measurement of $\Gamma (\phi \to \eta^\prime \gamma) / \Gamma (\phi \to \eta \gamma)$ and the pseudoscalar mixing angle - INSPIRE

DataBETA

Measurement of $\Gamma (\phi \to \eta^\prime \gamma) / \Gamma (\phi \to \eta \gamma)$ and the pseudoscalar mixing angle

KLOE

Collaboration

•

A Aloisio
(
- INFN, Naples and
- Naples U.
)

Jun, 2002

11 pages

Published in:

Phys.Lett.B 541 (2002) 45-51

e-Print:

hep-ex/0206010 [hep-ex]

DOI:

10.1016/S0370-2693(02)02145-7

PDG:

{{\mathit \phi}{(1020)}}

\rightarrow

{{\mathit \eta}^{\,'}{(958)}}{{\mathit \gamma}}

Experiments:

FRASCATI-DAFNE-KLOE

View in:

ADS Abstract Service

reference search79 citations

Citations per year

Abstract: (Elsevier)

We have measured the radiative decays φ → ηγ , φ → η ′ γ selecting π + π − γγγ final state in a sample of ∼5×10 7 φ -mesons produced at the Frascati φ -factory DA Φ NE. We obtain Γ ( φ → η ′ γ )/ Γ ( φ → ηγ )=(4.70±0.47±0.31)×10 −3 . From this result we derive new accurate values for the branching ratio BR( φ → η ′ γ )=(6.10±0.61±0.43)×10 −5 and the mixing angle of pseudoscalar mesons in the flavour basis ϕ P =(41.8 +1.9 −1.6 )°.

Note:

Submitted to Phys. Lett. B

13.65.+i
14.40.Aq
e + e − collisions
φ radiative decays
Pseudoscalar mixing angle
e+e− collisions
electron positron: colliding beams
electron positron: annihilation
Phi(1020): electroproduction
Phi(1020): radiative decay

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