Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-27
Phys.Lett.B626:86-94,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 5 figures
Scientific paper
10.1016/j.physletb.2005.08.113
We present a theoretical estimate for the cross-section of exclusive $\rho^+\rho^-$ and $\rho^0\rho^0$-meson production in two photon collisions when one of the initial photons is highly virtual. We focus on the discussion of the twist 4 contributions which are related to the production of an exotic isospin 2 resonance of two $\rho$ mesons. Our analysis shows that the recent experimental data obtained by the L3 Collaboration at LEP can be understood as a signal for the existence of an exotic isotensor resonance with a mass around $1.5 {\rm GeV}$.
Anikin I. V.
Pire Bernard
Teryaev Oleg V.
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