Exclusive f(1)(1285) meson production for energy ranges available at the GSI-FAIR with HADES and PANDA

0553344 - ÚJF 2022 RIV US eng J - Článek v odborném periodiku
Lebiedowicz, P. - Nachtmann, O. - Salabura, P. - Szczurek, A.
Exclusive f(1)(1285) meson production for energy ranges available at the GSI-FAIR with HADES and PANDA.
Physical Review D. Roč. 104, č. 3 (2021), č. článku 034031. ISSN 2470-0010. E-ISSN 2470-0029
Výzkumná infrastruktura: FAIR-CZ II - 90112
Klíčová slova: FAIR * HADES * PANDA
Obor OECD: Nuclear physics
Impakt faktor: 5.407, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevD.104.034031

We evaluate the cross section for the pp -> ppf(1)(1285) and pp -> ppf(1)(1285) reactions at near threshold energies relevant for the HADES and PANDA experiments at GSI-FAIR. We assume that at energies close to the threshold the omega omega -> f(1)(1285) and rho(0)rho(0) -> f(1)(1285) fusion processes are the dominant production mechanisms. The vertex for the VV -> f(1) coupling is derived from an effective coupling Lagrangian. The g(rho rho f1) coupling constant is extracted from the decay rate of f(1)(1285) -> rho(0)gamma using the vector-meson-dominance ansatz. We assume g(omega omega f1) = g(rho rho f1), equality of these two coupling constants, based on arguments from the naive quark model and vector-meson dominance. The amplitude for the VV -> f(1) fusion, supplemented by phenomenological vertex form factors for the process, is given. The differential cross sections at energies close to the threshold are calculated. In order to determine the parameters of the model the gamma p -> f(1)(1285)(p) reaction is discussed in addition and results are compared with the CLAS data. The possibility of a measurement by HADES@GSI is presented and discussed. We perform a Monte Carlo feasibility simulation of the pp -> ppf(1) reaction for root s = 3.46 GeV with the f(1) decaying into the pi(+)pi(-) pi(+)pi(-) (not shown explicitly) and pi(+)pi(-)eta(->pi(+)pi(-) pi(0)) final states using the PLUTO event generator. The latter f(1) decay is especially promising as a peak in the pi(+)pi(-)eta mass distribution should be observable by HADES.
Trvalý link: http://hdl.handle.net/11104/0328302