PT Journal
AU Wang, E
   Xie, JJ
   Liang, WH
   Guo, FK
   Oset, E
TI Role of a triangle singularity in the gamma p -> K+Lambda (1405) reaction
SO Physical Review C
JI Phys. Rev. C
PY 2017
BP 015205
EP 9pp
VL 95
IS 1
DI 10.1103/PhysRevC.95.015205
LA English
AB We show the effects of a triangle singularity mechanism for the gamma p -> K+Lambda(1405) reaction. The mechanism has a N-* resonance around 2030 MeV, which decays into K*Sigma. The K-* decays to K+ pi, and the pi Sigma merge to form the Lambda (1405). This mechanism produces a peak around root s = 2110 MeV, and has its largest contribution around cos theta= 0. The addition of this mechanism to other conventional ones leads to a good reproduction of d sigma/dcos theta and the integrated cross section around this energy, providing a solution to a problem encountered in previous theoretical models.
ER