Articulo
Z-boson production with two unobserved, back-to-back, hard photons at LEP
Autor
Dova, María Teresa
L3 Collaboration
Institución
Resumen
The double-radiative process e<sup>+</sup>e<sup>−</sup> → Zγγ → q ̄qγγ where the two hard photons escape detection at low polar angles into opposite directions, is studied in 0.62 fb<sup>−1</sup> of data collected with the L3 detector at LEP at centre-of-mass energies between 188.6 and 209.2 GeV. The cross sections are measured and found to be consistent with the Standard Model expectations. Facultad de Ciencias Exactas