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Title: Evolution of the $$\bar K N - \pi \Sigma$$ system with $$M^2_\pi$$ in a box from U$$\chi$$PT

The L ( 1405 ) baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. Its uncommon properties made it subject to numerous experimental and theoretical studies in recent years. Finite-volume Lattice-QCD eigenvalues for different quark masses were recently reported by the Adelaide group. We compare these eigenvalues to predictions of a model based on Unitary Chiral Perturbation Theory. The UCHPT calculation predicts the quark mass dependence remarkably well. It also explains the overlap pattern with different meson-baryon components, mainly p S and KN , at different quark masses. More accurate Lattice QCD data are required to draw definite conclusions on the nature of the L ( 1405 ) .
 [1] ;  [2]
  1. George Washington Univ., Washington, DC (United States)
  2. George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-THY-16-2203; DOE/OR/23177-3857
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: Proceedings of Science; Journal Volume: CD15; Conference: 8th International Workshop on Chiral Dynamics (CD15), 2~9 Jun - 03 Jul 2015. Pisa, Italy
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States