Exclusive ρ+ρ- production in two-photon collisions involving a single highly-virtual photon is studied for the first time with data collected by the L3 experiment at LEP at centre-of-mass energies 89< √s <209GeV with a total integrated luminosity of 854.7 pb-1. The cross section of the process γγ*→ρ+ρ- is determined as a function of the photon virtuality, Q2, and the two-photon centre-of-mass energy, Wγγ, in the kinematic region: 1.2< Q2 <30GeV2 and 1.1< Wγγ <3GeV. The ρ+ρ- production cross section is found to be of the same magnitude as the cross section of the process γγ*→ρ0ρ0, measured in the same kinematic region by L3, and to have similar Wγγ and Q2 dependences.

Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2004). Measurement of exclusive [rho]+[rho]- production in high-Q2 two-photon collisions at LEP. PHYSICS LETTERS. SECTION B, 587(1), 26-38 [10.1016/j.physletb.2004.07.013].

Measurement of exclusive [rho]+[rho]- production in high-Q2 two-photon collisions at LEP

PENSOTTI, SIMONETTA;
2004

Abstract

Exclusive ρ+ρ- production in two-photon collisions involving a single highly-virtual photon is studied for the first time with data collected by the L3 experiment at LEP at centre-of-mass energies 89< √s <209GeV with a total integrated luminosity of 854.7 pb-1. The cross section of the process γγ*→ρ+ρ- is determined as a function of the photon virtuality, Q2, and the two-photon centre-of-mass energy, Wγγ, in the kinematic region: 1.2< Q2 <30GeV2 and 1.1< Wγγ <3GeV. The ρ+ρ- production cross section is found to be of the same magnitude as the cross section of the process γγ*→ρ0ρ0, measured in the same kinematic region by L3, and to have similar Wγγ and Q2 dependences.
Articolo in rivista - Articolo scientifico
L3
English
26
38
Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., et al. (2004). Measurement of exclusive [rho]+[rho]- production in high-Q2 two-photon collisions at LEP. PHYSICS LETTERS. SECTION B, 587(1), 26-38 [10.1016/j.physletb.2004.07.013].
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