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Published November 12, 2001 | Version Published
Journal Article Open

Parity-Violating Photoproduction of π± on the Δ Resonance

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Abstract

We analyze the real-photon asymmetry Aγ± for the parity-violating (PV) π± production on the Δ resonance via the reactions γ→+p→Δ+→π++n and γ→+d→Δ0+p→π-+p+p. This asymmetry is nonvanishing due to a PV γNΔ coupling constant, dΔ±. We argue that an experimental determination of this coupling would be of interest for hadron dynamics, possibly shedding light on the S-wave/ P-wave puzzle in the hyperon nonleptonic decays and the violation of Hara's theorem in weak radiative hyperon decays.

Additional Information

© 2001 The American Physical Society Received 20 June 2001; published 29 October 2001 This work was supported in part under U.S. Department of Energy Contracts No. DE-AC05-84ER40150 and No. DE-FGO2-00ER41146, the National Science Foundation under award No. PHY98-01875, and a National Science Foundation Young Investigator Award. C. M. M. acknowledges support from FAPESP (Brazil), Grant No. 99/00080-5. We thank K. Gustafsson, T. Ito, J. Martin, and R. McKeown for helpful discussions.

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Identifiers

Eprint ID
2822
Resolver ID
CaltechAUTHORS:ZHUprl01

Funding

Department of Energy (DOE)
DE-AC05-84ER40150
Department of Energy (DOE)
DE-FGO2-00ER41146
NSF
PHY98-01875
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
99/00080-5

Dates

Created
2006-04-28
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Updated
2021-11-08
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