We report the first observation of e(+)e(-) annihilation into states of positive C parity, namely, rho(0)rho(0) and phi rho(0). The two states are observed in the pi(+)pi(-)pi(+)pi(-) and K+K-pi(+)pi(-) final states, respectively, in a data sample of 225 fb(-1) collected by the BABAR experiment at the Positron-Electron Project II e(+)e(-) storage rings at energies near root s=10.58 GeV. The distributions of cos theta(*), where theta(*) is the center-of-mass polar angle of the phi meson or the forward rho(0) meson, suggest production by two-virtual-photon annihilation. We measure cross sections within the range vertical bar cos theta(*)vertical bar < 0.8 of sigma(e(+)e(-)->rho(0)rho(0))=20.7 +/- 0.7(stat)+/- 2.7(syst) fb and sigma(e(+)e(-)->phi rho(0))=5.7 +/- 0.5(stat)+/- 0.8(syst) fb.

Observation of e(+)e(-) annihilation into the C=+1 hadronic final states rho(0)rho(0) and phi rho(0)

BIANCHI, Fabrizio;GAMBA, Diego;
2006-01-01

Abstract

We report the first observation of e(+)e(-) annihilation into states of positive C parity, namely, rho(0)rho(0) and phi rho(0). The two states are observed in the pi(+)pi(-)pi(+)pi(-) and K+K-pi(+)pi(-) final states, respectively, in a data sample of 225 fb(-1) collected by the BABAR experiment at the Positron-Electron Project II e(+)e(-) storage rings at energies near root s=10.58 GeV. The distributions of cos theta(*), where theta(*) is the center-of-mass polar angle of the phi meson or the forward rho(0) meson, suggest production by two-virtual-photon annihilation. We measure cross sections within the range vertical bar cos theta(*)vertical bar < 0.8 of sigma(e(+)e(-)->rho(0)rho(0))=20.7 +/- 0.7(stat)+/- 2.7(syst) fb and sigma(e(+)e(-)->phi rho(0))=5.7 +/- 0.5(stat)+/- 0.8(syst) fb.
2006
97
112002
-
B. Aubert; R. Barate; M. Bona; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges; A. Palano; J. C. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/49532
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