The K0SK±π∓ final state in two-photon collisions is studied with the L3 detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb-1. The η(1475) and f 1(1420) mesons are observed and their contribution is separated by measuring the formation rates as a function of the photon virtuality Q 2. The η(1475) is found to be dominant for Q2 0.01GeV2 and its two-photon width is measured to be 0.23±0.05 (stat.) ±0.05 (sys.) keV. At higher Q2, the f 1(1420) is formed and decays to K*(892)K. The γγ coupling and form factor parameters of this state are measured to be Γγγ ≤ 3.2±0.6 (stat.) ±0.7 (sys.) keV and Λ1 ≤ 926±72 (stat.) ±32 (sys.) MeV, respectively. © SISSA 2007.

Achard, P., Adriani, O., Aguilar Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2007). Study of resonance formation in the mass region 1400−1500 MeV through the reaction gamma gamma --> K0(S) K+- pi-+. JOURNAL OF HIGH ENERGY PHYSICS, 2007(03), 018-018 [10.1088/1126-6708/2007/03/018].

Study of resonance formation in the mass region 1400−1500 MeV through the reaction gamma gamma --> K0(S) K+- pi-+

PENSOTTI, SIMONETTA;
2007

Abstract

The K0SK±π∓ final state in two-photon collisions is studied with the L3 detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb-1. The η(1475) and f 1(1420) mesons are observed and their contribution is separated by measuring the formation rates as a function of the photon virtuality Q 2. The η(1475) is found to be dominant for Q2 0.01GeV2 and its two-photon width is measured to be 0.23±0.05 (stat.) ±0.05 (sys.) keV. At higher Q2, the f 1(1420) is formed and decays to K*(892)K. The γγ coupling and form factor parameters of this state are measured to be Γγγ ≤ 3.2±0.6 (stat.) ±0.7 (sys.) keV and Λ1 ≤ 926±72 (stat.) ±32 (sys.) MeV, respectively. © SISSA 2007.
Articolo in rivista - Articolo scientifico
e plus -e- experiments
English
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018
1
Achard, P., Adriani, O., Aguilar Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2007). Study of resonance formation in the mass region 1400−1500 MeV through the reaction gamma gamma --> K0(S) K+- pi-+. JOURNAL OF HIGH ENERGY PHYSICS, 2007(03), 018-018 [10.1088/1126-6708/2007/03/018].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/14425
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