Dalitz plot analysis of $e^+ e^- \to \pi^0 \pi^0 \gamma$ events at $\sqrt{s}$ approximately M($\phi$) with the KLOE detector - INSPIRE

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Dalitz plot analysis of $e^+ e^- \to \pi^0 \pi^0 \gamma$ events at $\sqrt{s}$ approximately M( $\phi$ ) with the KLOE detector

KLOE

Collaboration

•

F. Ambrosino
(
- INFN, Naples and
- Naples U.
)

Sep, 2006

21 pages

Published in:

Eur.Phys.J.C 49 (2007) 473-488

e-Print:

hep-ex/0609009 [hep-ex]

DOI:

10.1140/epjc/s10052-006-0157-7

PDG:

{{\mathit f}_{{{0}}}{(980)}}

Experiments:

FRASCATI-DAFNE-KLOE

View in:

ADS Abstract Service

reference search111 citations

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Abstract: (arXiv)

We have studied the Dalitz plot of the e+ e- --> pi0 pi0 gamma events collected at SQRT(s) ~ M(phi) with the KLOE detector. In the dipion invariant mass (Mpp) region below 700 MeV, the process under study is dominated by the non-resonant process e+ e- --> omega pi0 with omega --> pi0 gamma whereas, for higher Mpp values, the radiative phi decay to the f0(980) is the dominant mechanism. Different theoretical models are used to fit the Dalitz plot, taking also into account a possible contribution of the sigma(600). For each model, we extract the f0(980) mass and its coupling to pipi, KKbar and to the phi.

Note:

21 pages, 15 figures, 5 tables, submitted to European Physics Journal C

electron positron: colliding beams
electron positron: annihilation
pi0: pair production
photon: associated production
mass spectrum: (2pi0)
vector meson: electroproduction
omega(783): radiative decay
Phi(1020): radiative decay
scalar meson: intermediate state
f0(980): mass

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