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Title: Evolution of the KbarN - piSigma system with M_pi^2 in a box from UCHPT

The Lambda(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 (UCHPT). The UCHPT calculation predicts the quark mass dependence remarkably well. It also explains the overlap pattern with different meson-baryon components, mainly piSigma and KbarN, at different quark masses. More accurate Lattice QCD data are required to draw definite conclusions on the nature of the Lambda(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-16-2325; DOE/OR/23177-3896
DOE Contract Number:
AC05-06OR23177; NSFCAREER grant No. 1452055; PIF grant No. 1415459
Resource Type:
Resource Relation:
Conference: Hadron 2015, 13-18 Sep 2015. Newport News, Virginia, USA
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