Effect of the K(K)over-bar and eta eta channels and interference phenomena in the two-pion and K(K)over-bar transitions of charmonia and bottomonia

0486512 - ÚJF 2019 RIV US eng J - Článek v odborném periodiku
Surovtsev, Yu .S. - Bydžovský, Petr - Gutsche, T. - Kaminski, R. - Lyubovitskij, V. E. - Nagy, M.
Effect of the K(K)over-bar and eta eta channels and interference phenomena in the two-pion and K(K)over-bar transitions of charmonia and bottomonia.
Physical Review D. Roč. 97, č. 1 (2018), č. článku 014009. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA ČR(CZ) GA15-04301S
Institucionální podpora: RVO:61389005
Klíčová slova: resonances * mass distribution * decays
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 4.368, rok: 2018

It is shown that the basic shape of dipion and K (K) over bar mass spectra in decays J/psi -> phi (pi pi, K (K) over bar), psi(2s) -> J/psi pi pi, Y(4260) -> J/pi pi and in the two-pion transitions of bottomonia states are explained by an unified mechanism based on the contribution of the pi pi, K (K) over bar and eta eta coupled channels including their interference. The role of the individual f(0) resonances in making up the shape of the dipion mass distributions in the charmonia and bottomonia decays is considered.
Trvalý link: http://hdl.handle.net/11104/0281348