We measured, with the KLOE detector, the spectrum of pi(+)pi(-) invariant mass in a sample of 6.7 x 10(5) e(+)e(-) -> pi(+)pi(-)gamma events with the photon at large polar angle (theta(gamma) > 45 degrees) at a centre of mass energy root s around the phi mass. We observe in this spectrum a clear contribution from the intermediate process phi -> f(0)(980)gamma. A sizeable effect is also observed in the distribution of the pion forward-backward asymmetry. We use different theoretical models to fit the spectrum and we determine the to mass and coupling constants to the phi, to pi(+)pi(-) and to KK. (c) 2006 Elsevier B.V. All rights reserved.

Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., et al. (2006). Study of the decay phi -> f(0)(980)gamma -> pi (+) pi(-) gamma with the KLOE detector. PHYSICS LETTERS. SECTION B, 634(2-3), 148-154 [10.1016/j.physletb.2006.01.016].

Study of the decay phi -> f(0)(980)gamma -> pi (+) pi(-) gamma with the KLOE detector

CERADINI, Filippo;DI MICCO, Biagio;
2006-01-01

Abstract

We measured, with the KLOE detector, the spectrum of pi(+)pi(-) invariant mass in a sample of 6.7 x 10(5) e(+)e(-) -> pi(+)pi(-)gamma events with the photon at large polar angle (theta(gamma) > 45 degrees) at a centre of mass energy root s around the phi mass. We observe in this spectrum a clear contribution from the intermediate process phi -> f(0)(980)gamma. A sizeable effect is also observed in the distribution of the pion forward-backward asymmetry. We use different theoretical models to fit the spectrum and we determine the to mass and coupling constants to the phi, to pi(+)pi(-) and to KK. (c) 2006 Elsevier B.V. All rights reserved.
2006
Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., et al. (2006). Study of the decay phi -> f(0)(980)gamma -> pi (+) pi(-) gamma with the KLOE detector. PHYSICS LETTERS. SECTION B, 634(2-3), 148-154 [10.1016/j.physletb.2006.01.016].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/121377
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