Measurement of $\sigma(e^+ e^- \to \pi^+ \pi^-)$ from threshold to 0.85 GeV$^2$ using Initial State Radiation with the KLOE detector - INSPIRE

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Measurement of $\sigma(e^+ e^- \to \pi^+ \pi^-)$ from threshold to 0.85 GeV $^2$ using Initial State Radiation with the KLOE detector

KLOE

Collaboration

•

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

Jun, 2010

17 pages

Published in:

Phys.Lett.B 700 (2011) 102-110

e-Print:

1006.5313 [hep-ex]

DOI:

10.1016/j.physletb.2011.04.055

View in:

ADS Abstract Service

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Abstract: (Elsevier)

We have measured the cross section of the radiative process e+e−→π+π−γ with the KLOE detector at the Frascati ϕ -factory DAΦNE, from events taken at a CM energy W=1 GeV . Initial state radiation allows us to obtain the cross section for e+e−→π+π− , the pion form factor |Fπ|2 and the dipion contribution to the muon magnetic moment anomaly, Δaμππ=(478.5±2.0stat±5.0syst±4.5th)×10−10 in the range 0.1

13.60.Hb
13.66.Jn
13.40.Gp
13.66.Bc
Hadronic cross section
Initial state radiation
Pion form factor
Muon anomaly
muon: magnetic moment
radiation: initial-state interaction

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Figures(1)

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