Photoproduction of neutral pion pairs in the Coulomb field of the nucleus

Details Photoproduction of neutral pion pairs in the Coulomb field of the nucleus Photoproduction of neutral pion pairs in the Coulomb field of the nucleus

1995-12-15

arxiv.org/abs/hep-ph/9512324v2

J.Phys.G23:823-835,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 6 figures, uses epsf, ioplppt.sty, iopl12.sty (included); Added a discussion of main background from double pion pho

Scientific paper

10.1088/0954-3899/23/7/007

The total cross section for Coulomb photoproduction of neutral pion pairs in the reaction gamma A --> pi0 pi0 A is estimated within the effective chiral lagrangian approach. The amplitude of gamma gamma* --> pi0 pi0 with one off-shell photon is calculated at O(p^6) in the momentum expansion; in addition, nuclear absorption is taken into account. Besides its experimental feasibility, the results of the calculation demonstrate that the reaction gamma A --> pi0 pi0 A is a powerful source of information on the process gamma gamma --> pi0 pi0 close to threshold.

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