Radiative corrections to the η(') Dalitz decays

Husek, TomasCharles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 8, Czech Republic;Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England (författare)

We provide the complete set of radiative corrections to the Dalitz decays eta(()'()) -> l(+)l(-)gamma beyond the softphoton approximation, i. e., over the whole range of the Dalitz plot and with no restrictions on the energy of a radiative photon. The corrections inevitably depend on the eta(()'()) -> gamma*gamma(*) transition form factors. For the singly virtual transition form factor appearing, e.g., in the bremsstrahlung correction, recent dispersive calculations are used. For the one-photon-irreducible contribution at the one-loop level (for the doubly virtual form factor), we use a vector-meson-dominance-inspired model while taking into account the eta-eta' mixing.

Kampf, KarolCharles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 8, Czech Republic (författare)
Novotny, JiriCharles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 8, Czech Republic (författare)
Leupold, StefanUppsala universitet,Kärnfysik(Swepub:uu)stele192 (författare)
Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 8, Czech Republic;Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandCharles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 8, Czech Republic (creator_code:org_t)

Av författaren/redakt...: Husek, Tomas; Kampf, Karol; Novotny, Jiri; Leupold, Stefan

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