APS » PROLA » Phys. Rev. Lett. » Volume 89 » Issue 24

Phys. Rev. Lett. 89, 242001 (2002) [3 pages]

Δ→Nγ in Large-Nc QCD
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Elizabeth Jenkins1 *, Xiangdong Ji2 †, and Aneesh V. Manohar1 ‡
1University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0319
2Department of Physics, University of Maryland, College Park, Maryland 20742

Received 8 July 2002; published 20 November 2002

The decay Δ+→pγ is studied in the 1/Nc expansion of QCD. The ratio of the helicity amplitudes is determined to be A3/2/A1/2=sqrt[3]+O(1/Nc2). Equivalently, the ratio E2/M1 of the multipole amplitudes is predicted to be order 1/Nc2.


©2002 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v89/e242001
DOI: 10.1103/PhysRevLett.89.242001
PACS: 14.20.Gk, 11.15.Pg, 12.38.–t

* Electronic address: ejenkins@ucsd.edu
† Electronic address: xji@physics.umd.edu
‡ Electronic address: amanohar@ucsd.edu

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