Conference paper

Mixing angles in S11 and D13 baryons

Simon Capstick ; Department of Physics, Florida State University, Tallahassee, FL 32306-4350, USA
Winston Roberts ; Department of Physics, Old Dominion University, Norfolk, VA 23529 USA, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, VA 23606, USA

Abstract

The nature of the short-range interactions between quarks in baryons is of fundamental importance to our understanding of the nature of nuclear matter in the soft-QCD regime. Models of the structure of the negative-parity excited baryons in the S11 and D13 partial waves in Nπ scattering differ in their predictions for the amount by which states of different quark spin but the same total spin are mixed. It may be possible to distinguish among these models by an accurate determination of the mixing angles in these states. A study of the dependence on these mixing angles of their decay branching fractions to Nπ, Nη, and ΛK, using a constituent quark model and the 3P0 decay model, allows conclusions to be drawn about the values of the mixing angles.

Keywords

constituent quark model; 3P0 model; mixing angles

Hrčak ID:

305630

URI

https://hrcak.srce.hr/305630

Publication date:

1.3.2004.

Article data in other languages: croatian

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