Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 3 de 3
Filter
Add more filters










Database
Language
Publication year range
1.
Eur Phys J C Part Fields ; 74(10): 2981, 2014.
Article in English | MEDLINE | ID: mdl-25972760

ABSTRACT

We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.

2.
Phys Rev Lett ; 99(6): 062002, 2007 Aug 10.
Article in English | MEDLINE | ID: mdl-17930816

ABSTRACT

We analyze the photoproduction helicity amplitudes for positive-parity excited baryons in the context of the 1/N(c) expansion of QCD. The results show that subleading corrections in 1/N(c) are important and that, while one-body effective operators are dominant, there is some evidence for the need for two-body effects.

3.
Phys Rev Lett ; 88(10): 102002, 2002 Mar 11.
Article in English | MEDLINE | ID: mdl-11909347

ABSTRACT

The masses of the negative parity 70-plet baryons are analyzed in large N(c) QCD to order 1/N(c) and to first order in SU(3) symmetry breaking. The existing experimental data are well reproduced and 20 new observables are predicted. The leading order SU(6) spin-flavor symmetry breaking is small and, as it occurs in the quark model, the subleading in 1/N(c) hyperfine interaction is the dominant source of the breaking. It is found that the Lambda(1405) and Lambda(1520) are well described as three-quark states and spin-orbit partners. New relations between splittings in different SU(3) multiplets are found.

SELECTION OF CITATIONS
SEARCH DETAIL
...