Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Structure of the Λ (1405) from Hamiltonian effective field theory|
|Other Titles:||Structure of the Lambda (1405) from Hamiltonian effective field theory|
|Citation:||Physical Review D, 2017; 95(1):014506-1-014506-10|
|Publisher:||AMER PHYSICAL SOC|
|Zhan-Wei Liu, Jonathan M. M. Hall, Derek B. Leinweber, Anthony W. Thomas and Jia-Jun Wu|
|Abstract:||The pole structure of the Λ(1405) is examined by fitting the couplings of an underlying Hamiltonian effective field theory to cross sections of K−p scattering in the infinite-volume limit. Finite-volume spectra are then obtained from the theory, and compared to lattice QCD results for the mass of the Λ(1405). Momentum-dependent, nonseparable potentials motivated by the well-known Weinberg-Tomozawa terms are used, with SU(3) flavor symmetry broken in the couplings and masses. In addition, we examine the effect on the behavior of the spectra from the inclusion of a bare triquarklike isospin-zero basis state. It is found that the cross sections are consistent with the experimental data with two complex poles for the Λ(1405), regardless of whether a bare-baryon basis state is introduced or not. However, it is apparent that the bare baryon is important for describing the results of lattice QCD at high pion masses.|
|Rights:||© 2017 American Physical Society|
|Appears in Collections:||Physics publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.