The reactions e(+)e(-) --> e(+)e(-)e(+)e(-) and e(+)e(-) --> e(+)e(-)mu(+)mu(-), in a single tag configuration, are studied at LEP with the L3 detector. The data set corresponds to an integrated luminosity of 93.7 pb(-1) at root s = 91 GeV. Differential cross sections are measured for 1.4 GeV2 less than or equal to Q(2) less than or equal to 7.6 GeV2. The leptonic photon structure function F-2(gamma) and azimuthal correlations are measured for e(+)e(-) --> e(+)e(-)mu(+)mu(-). The related structure functions F-A(gamma) and F-B(gamma), which originate from interference terms of the scattering amplitudes, are determined for the first time. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
Photon structure functions and azimuthal correlations of lepton pairs in tagged gamma gamma collisions
FERRONI, Fernando
1998-01-01
Abstract
The reactions e(+)e(-) --> e(+)e(-)e(+)e(-) and e(+)e(-) --> e(+)e(-)mu(+)mu(-), in a single tag configuration, are studied at LEP with the L3 detector. The data set corresponds to an integrated luminosity of 93.7 pb(-1) at root s = 91 GeV. Differential cross sections are measured for 1.4 GeV2 less than or equal to Q(2) less than or equal to 7.6 GeV2. The leptonic photon structure function F-2(gamma) and azimuthal correlations are measured for e(+)e(-) --> e(+)e(-)mu(+)mu(-). The related structure functions F-A(gamma) and F-B(gamma), which originate from interference terms of the scattering amplitudes, are determined for the first time. (C) 1998 Published by Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
