English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/20759
Title: Electromagnetic structure of the lowest-lying decuplet resonances in covariant chiral perturbation theory
Authors: Geng, Li Sheng; Martín Cámalich, Jorge; Vicente Vacas, Manuel J.
Issue Date: 25-Aug-2009
Publisher: American Physical Society
Citation: Physical Review - Section D - Particles and Fields 80 (3): 034027 (2009)
Abstract: We present a calculation of the leading SU(3)-breaking O(p(3)) corrections to the electromagnetic moments and charge radius of the lowest-lying decuplet resonances in covariant chiral perturbation theory. In particular, the magnetic dipole moment of the members of the decuplet is predicted fixing the only low-energy constant (LEC) present up to this order with the well-measured magnetic dipole moment of the Omega(-). We predict mu(++)(Delta) = 6.04(13) and mu(+)(Delta) = 2.84(2), which agree well with the current experimental information. For the electric quadrupole moment and the charge radius, we use state-of-the-art lattice QCD results to determine the corresponding LECs, whereas for the magnetic octupole moment there is no unknown LEC up to the order considered here, and we obtain a pure prediction. We compare our results with those reported in large N-c, lattice QCD, heavy-baryon chiral perturbation theory, and other models.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevD.80.034027
URI: http://hdl.handle.net/10261/20759
DOI: 10.1103/PhysRevD.80.034027
ISSN: 1550-7998
Appears in Collections:(IFIC) Artículos
Files in This Item:
File Description SizeFormat 
electromagnetic.pdf275,82 kBAdobe PDFThumbnail
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.