Gauge symmetric Delta(1232) couplings and the radiative muon capture in hydrogen - INSPIRE

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Gauge symmetric Delta(1232) couplings and the radiative muon capture in hydrogen

J. Smejkal
(
- Rez, Nucl. Phys. Inst.
)
,
E. Truhlik
(
- Rez, Nucl. Phys. Inst. and
- Washington U., Seattle
)

Sep, 2004

9 pages

Published in:

Phys.Rev.C 72 (2005) 015501

e-Print:

nucl-th/0409011 [nucl-th]

DOI:

10.1103/PhysRevC.72.015501

View in:

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Abstract:

Using the difference between the gauge symmetric and standard pi-N-delta couplings, a contact pi-pi-N-N term, quadratic in the pi-N-delta coupling, is explicitly constructed. Besides, a contribution from the delta excitation mechanism to the photon spectrum for the radiative muon capture in hydrogen is derived from the gauge symmetric pi-N-delta and gamma-N-delta couplings. It is shown for the photon spectrum, studied recently experimentally, that the new spectrum is for the photon momentums k > 60 MeV by 4-10 % smaller than the one obtained from standardly used couplings with the on-shell deltas.

Note:

9 pages, 3 figures

11.40.Ha
13.60.-r
12.39.Fe
23.40.-s
muon- p: interaction
hydrogen
muon: radiative capture
photon: emission
Delta(1232): coupling constant
vertex function: (Delta(1232) nucleon pi)

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Figures(0)

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