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Investigation of the f 2(1270) and a 2(1320) resonances in γ*(Q 2)γ collisions

  • Fields, Particles, and Nuclei
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Abstract

The investigations of the Q 2 dependence of the cross sections for the formation of the f 2(1270) and a 2(1320) resonances in γ*(Q 2)γ collisions at the existing and future colliders with ultrahigh luminosity are discussed. An increase in Q 2 results in a change in the dominant helicity amplitude in the γ*(Q 2)γ → f 2(1270) and γ*(Q 2)γ → a 2(1320) reactions because of the QCD asymptotic behavior at large values of Q 2. The transition to the QCD asymptotic behavior in the γ*(Q 2)γ → f 2(1270), a 2(1320) amplitudes is shown to occur through the compensation of the contributions of the ground-state vector mesons ρ and ω in the Q 2 channel by those of their radial excitations.

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Authors and Affiliations

  1. Laboratory of Theoretical Physics, Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, Universitetskii pr. 4, Novosibirsk, 630090, Russia

    N. N. Achasov, A. V. Kiselev & G. N. Shestakov

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  1. N. N. Achasov
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  2. A. V. Kiselev
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  3. G. N. Shestakov
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Correspondence to N. N. Achasov.

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Original Russian Text © N.N. Achasov, A.V. Kiselev, G.N. Shestakov, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 102, No. 9, pp. 655–659.

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Achasov, N.N., Kiselev, A.V. & Shestakov, G.N. Investigation of the f 2(1270) and a 2(1320) resonances in γ*(Q 2)γ collisions. Jetp Lett. 102, 571–575 (2015). https://doi.org/10.1134/S002136401521002X

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  • DOI: https://doi.org/10.1134/S002136401521002X

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