On the polarization properties of the charmed baryon Λ + c in the Λ + c → p + K − + π + + π 0 decay

The polarization properties of the charmed Λc baryon are investigated in weak non–leptonic four–body Λc → p+K−+π++π0 decay. The probability of this decay and the angular distribution of the probability are calculated in the effective quark model with chiral U(3)×U(3) symmetry incorporating Heavy Quark Effective theory (HQET) and the extended Nambu–Jona–Lasinio model with a linear realization of chiral U(3)× U(3) symmetry. The theoretical value of the probability of the decay Λc → p+K−+π++π0 relative to the probability of the decay Λc → p+K−+π+ does not contain free parameters and fits well experimental data. The application of the obtained results to the analysis of the polarization of the Λc produced in the processes of photo and hadroproduction is discussed. E–mail: [email protected] E–mail: [email protected], Physics Department, University of Arizona, Tucson, Arizona 85721, USA