TY  - JOUR
AU  - Xie, J. J.
AU  - Chen, H. X.
AU  - Oset, E.
PY  - 2011
DA  - 2011//
TI  - The pp -> p Lambda K(+) and pp -> p Sigma(0)K(+) reactions with chiral dynamics
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 034004
EP  - 8pp
VL  - 84
IS  - 3
PB  - Amer Physical Soc
AB  - We report on a theoretical study of the pp -> p Lambda K(+) and pp -> p Sigma(0)K(+) reactions near threshold using a chiral dynamical approach. The production process is described by single-pion and single-kaon exchange. The final state interactions of nucleon-hyperon, K-hyperon, and K-nucleon systems are also taken into account. We show that our model leads to a fair description of the experimental data on the total cross section of the pp -> p Lambda K(+) and pp -> p Sigma(0)K(+) reactions. We find that the experimental observed strong suppression of Sigma(0) production compared to Lambda production at the same excess energy can be explained. However, ignorance of phases between some amplitudes does not allow one to properly account for the nucleon-hyperon final state interaction for the pp -> p Sigma(0)K(+) reaction. We also demonstrate that the invariant mass distribution and the Dalitz plot provide direct information about the Lambda and Sigma(0) production mechanisms and may be tested by experiments at COSY or HIRFL-CSR.
SN  - 0556-2813
UR  - http://arxiv.org/abs/1105.4791
UR  - https://doi.org/10.1103/PhysRevC.84.034004
DO  - 10.1103/PhysRevC.84.034004
LA  - English
N1  - WOS:000294925700001
ID  - Xie_etal2011
ER  -