Exclusive ρ+ρ- production in two-photon collisions between a quasi-real photon, γ, and a mid-virtuality photon, γ*, is studied with data collected at LEP at centre-of-mass energies 183 GeV< √s <209 GeV with a total integrated luminosity of 684.8 pb-1. The cross section of the γγ*→ρ+ρ- process is determined as a function of the photon virtuality, Q2, and the two-photon centre-of-mass energy, Wγγ, in the kinematic region: 0.2 GeV2< Q2 <0.85 GeV2 and 1.1 GeV< Wγγ <3 GeV. These results, together with previous L3 measurements of ρ0ρ0 and ρ+ρ- production, allow a study of the γγ*→ρρ process over the Q2-region 0.2 GeV2< Q2 <30 GeV2.

Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2005). Measurement of exclusive rho+ rho- production in mid-virtuality two-photon interactions and study of the gamma gamma* --> rho rho process at LEP. PHYSICS LETTERS. SECTION B, 615(1-2), 19-30 [10.1016/j.physletb.2005.04.011].

Measurement of exclusive rho+ rho- production in mid-virtuality two-photon interactions and study of the gamma gamma* --> rho rho process at LEP

PENSOTTI, SIMONETTA;
2005

Abstract

Exclusive ρ+ρ- production in two-photon collisions between a quasi-real photon, γ, and a mid-virtuality photon, γ*, is studied with data collected at LEP at centre-of-mass energies 183 GeV< √s <209 GeV with a total integrated luminosity of 684.8 pb-1. The cross section of the γγ*→ρ+ρ- process is determined as a function of the photon virtuality, Q2, and the two-photon centre-of-mass energy, Wγγ, in the kinematic region: 0.2 GeV2< Q2 <0.85 GeV2 and 1.1 GeV< Wγγ <3 GeV. These results, together with previous L3 measurements of ρ0ρ0 and ρ+ρ- production, allow a study of the γγ*→ρρ process over the Q2-region 0.2 GeV2< Q2 <30 GeV2.
Articolo in rivista - Articolo scientifico
L3,CERN-LEP-L3
English
mag-2005
615
1-2
19
30
none
Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2005). Measurement of exclusive rho+ rho- production in mid-virtuality two-photon interactions and study of the gamma gamma* --> rho rho process at LEP. PHYSICS LETTERS. SECTION B, 615(1-2), 19-30 [10.1016/j.physletb.2005.04.011].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/12895
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