TY  - JOUR
AU  - Ikeno, N.
AU  - Molina, R.
AU  - Oset, E.
PY  - 2021
DA  - 2021//
TI  - Triangle singularity mechanism for the pp -> pi(+)d fusion reaction
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 014614
EP  - 16pp
VL  - 104
IS  - 1
PB  - Amer Physical Soc
AB  - We develop a model for the pp -> pi(+)d reaction based on the pp -> Delta(1232)N transition followed by Delta(1232) -> pi N' decay and posterior fusion of NN' to give the deuteron. We show that the triangle diagram depicting this process develops a triangle singularity leading to a large cross section of this reaction compared to ordinary fusion reactions. The results of the calculation also show that the process is largely dominated by the pp system in L = 2 and S = 0, which transfers J = 2 to the final pi(+)d system. This feature is shown to be well suited to provide L = 2, S = 1, and J(tot) = 3 for np in the np(I = 0) pi(-)pp reaction followed by the pp -> pi(+)d reaction, which has been proposed recently, as a means of describing the so far assumed dibaryon d* (2380) peak.
SN  - 2469-9985
UR  - https://arxiv.org/abs/2103.01712
UR  - https://doi.org/10.1103/PhysRevC.104.014614
DO  - 10.1103/PhysRevC.104.014614
LA  - English
N1  - WOS:000677555100001
ID  - Ikeno_etal2021
ER  -