Parity-violating photoproduction of π± on the Δ resonance -: art. no. 201802

被引：20

作者：

Zhu, SL ^{[1
]}

Maekawa, CM

Holstein, BR

Ramsey-Musolf, MJ

机构：

[1] CALTECH, Kellogg Radiat Lab 10638, Pasadena, CA 91125 USA

[2] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

[3] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[4] Thomas Jefferson Natl Accelerator Facil, Theory Grp, Newport News, VA 23606 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.87.201802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the real-photon asymmetry A(gamma)(+/-) for the parity-violating (PV) pi (+/-) production on the Delta resonance via the reactions <(<gamma>)over right arrow> + p --> Delta (+) --> pi (+) + n and <(<gamma>)over right arrow> + d --> Delta (0) + p --> pi (-) + p + p. This asymmetry is nonvanishing due to a PV gammaN Delta coupling constant, d(Delta)(+/-). 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.

引用

页数：4

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