https://doi.org/10.1140/epja/i2016-16114-2
Regular Article - Theoretical Physics
On the strong coupling N(*)N(*)
1
Department of Physics, Doğuş University, Acıbadem-Kadıköy, 34722, Istanbul, Turkey
2
Electrical and Electronics Engineering Department, Atilim University, 06836, Ankara, Turkey
3
Department of Physics, Kocaeli University, 41380, Izmit, Turkey
* e-mail: kazizi@dogus.edu.tr
Received:
17
November
2015
Accepted:
21
February
2016
Published online:
26
April
2016
We study the strong vertices 
, 
and 
in QCD, where 
denotes the negative-parity 
state. We use the most general form of the interpolating currents to calculate the corresponding strong coupling constants. It is obtained that the coupling associated to vertex is strongly suppressed compared to those related to two other vertices. The strong coupling corresponding to is obtained to be roughly half of that of vertex. We compare the obtained results on and vertices with the existing predictions of other theoretical studies as well as those extracted from the experimental data.
© SIF, Springer-Verlag Berlin Heidelberg, 2016
