The role of Delta(1700) excitation and rho production in double pion photoproduction
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The role of Delta(1700) excitation and rho production in double pion photoproduction

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The role of Delta(1700) excitation and rho production in double pion photoproduction

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Nácher Díez, José Carlos; Oset Báguena, Eulogio Perfil; Vicente Vacas, Manuel José; Roca Zamora, Luis
Aquest document és un/a article, creat/da en: 2001
Recent information on invariant mass distributions of the gammap --> pi (+)pi (0)n reaction, where previous theoretical models had shown deficiencies, have made more evident the need for new mechanisms, so far neglected or inaccurately included. We have updated a previous model to include new necessary mechanisms. We find that the production of the rho meson, and the Delta (1700) excitation, through interference with the dominant terms, are important mechanisms that solve the puzzle of the gammap --> pi (+)pi (0)n reaction without spoiling the early agreement with the gammap --> pi (+)pi (-)p and gammap --> pi (0)pi (0)p reactions.

    Nácher Díez, José Carlos Oset Báguena, Eulogio Vicente Vacas, Manuel José Roca, L. 2001 The role of Delta(1700) excitation and rho production in double pion photoproduction Nuclear Physics A 695 295 327
http://dx.doi.org/10.1016/S0375-9474(01)01110-1
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