Weak decay of Λc+ for the study of Λ(1405) and Λ(1670)

Kenta Miyahara, Tetsuo Hyodo, and Eulogio Oset
Phys. Rev. C 92, 055204 – Published 13 November 2015

Abstract

We study the Λc decay process to π+ and the meson-baryon final state for the analysis of Λ resonances. Considering the Cabibbo-Kobayashi-Maskawa matrix, color suppression, diquark correlation, and the kinematical condition, we show that the final meson-baryon state should be in a pure I=0 combination, when the meson-baryon invariant mass is small. Because the I=1 contamination usually makes it difficult to analyze Λ resonances directly from experiments, the Λc decay is an ideal process to study Λ resonances. Calculating the final-state interaction by chiral unitary approaches, we find that the πΣ invariant mass distributions have the same peak structure in the all charge combination of the πΣ states related to the higher pole of the two poles of the Λ(1405). Furthermore, we obtain a clear Λ(1670) peak structure in the K¯N and ηΛ spectra.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 26 August 2015

DOI:https://doi.org/10.1103/PhysRevC.92.055204

©2015 American Physical Society

Authors & Affiliations

Kenta Miyahara*

  • Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan

Tetsuo Hyodo

  • Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

Eulogio Oset

  • Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Apartado 22085, 46071 Valencia, Spain

  • *miyahara@ruby.scphys.kyoto-u.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 92, Iss. 5 — November 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×