PT Journal
AU Guo, FK
   Meissner, UG
   Nieves, J
   Yang, Z
TI Remarks on the P-c structures and triangle singularities
SO European Physical Journal A
JI Eur. Phys. J. A
PY 2016
BP 318
EP 6pp
VL 52
IS 10
DI 10.1140/epja/i2016-16318-4
LA English
AB It was proposed that the narrow P-c(4450) structure observed by the LHCb Collaboration in the reaction Lambda(b) -> J/psi pK might be due to a triangle singularity around the chi(c1)-proton threshold at 4.45 GeV. We discuss the occurrence of a similar triangle singularity in the J/psi p invariant mass distribution for the decay Lambda(b) -> J/psi p pi, which could explain the bump around 4.45 GeV in the data. More precise measurements of this process would provide valuable information towards an understanding of the P-c structures.
ER