TY  - JOUR
AU  - Abreu, L. M.
AU  - Wang, W. F.
AU  - Oset, E.
PY  - 2023
DA  - 2023//
TI  - Traces of the new alpha(0)(1780) resonance in the J/Psi ->phi K+ K-(K-0 K_(0)) reaction
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 243 - 11pp
VL  - 83
IS  - 3
PB  - Springer
AB  - We study the J/Psi ->phi K+ K- decay, looking for differences in the production rates of K+K- or K-0 K-(0) in the region of 1700-1800 MeV, where two resonances appear dynamically generated from the vector-vector interaction. Two resonances are known experimentally in that region, the f(0)(1710) and a new resonance reported by the BABAR and BESIII collaborations. The K K should be produced with I = 0 in that reaction, but due to the different K*(0) and K*(+) masses some isospin violation appears. Yet, due to the large width of the K*, the violation obtained is very small and the rates of K+K- or K-0 K-0 production are equal within 5%. However, we also find that due to the step needed to convert two vectors into K K, a shape can appear in the K K mass distribution that can mimic the a0 production around the K* K* threshold, and is simply a threshold effect.
SN  - 1434-6044
UR  - https://arxiv.org/abs/2301.08058
UR  - https://doi.org/10.1140/epjc/s10052-023-11384-3
DO  - 10.1140/epjc/s10052-023-11384-3
LA  - English
N1  - WOS:000957576400004
ID  - Abreu_etal2023
ER  -