Exploring time like tranistions in pp, pi p and AA reactions with HADES

0541145 - ÚJF 2021 RIV FR eng C - Conference Paper (international conference)
Salabura, P. - Adamczewski-Musch, J. - Arnoldi-Meadows, B. - Chlad, Lukáš - Chudoba, Petr - Kugler, Andrej - Prozorov, Alexandr P. - Rodriguez Ramos, Pablo - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … Total 111 authors
Exploring time like tranistions in pp, pi p and AA reactions with HADES.
EPJ Web of Conferences. Vol. 241. Les Ulis: E D P Sciences, 2020, č. článku 01013. ISSN 2100-014X.
[12th International Workshop on the Physics of Excited Nucleons (NSTAR 2019). Bonn (DE), 10.06.2019-14.06.2019]
R&D Projects: GA MŠMT LM2015049; GA MŠMT EF16_013/0001677; GA MŠMT LTT17003
Institutional support: RVO:61389005
Keywords : HADES * nucleon * QCD
OECD category: Particles and field physics

Radiative transition of an excited baryon to a nucleon with emission of a virtual massive photon converting to dielectron pair (Dalitz decays) provides important information about baryon-photon coupling at low q(2) in timelike region. A prominent enhancement in the respective electromagnetic transition FormFactors (etFF) at q(2) near vector mesons rho/omega poles has been predicted by various calculations reflecting strong baryon-vector meson couplings. The understanding of these couplings is also of primary importance for the interpretation of the emissivity of QCD matter studied in heavy ion collisions via dilepton emission. Dedicated measurements of baryon Dalitz decays in proton-proton and pion-proton scattering with HADES detector at GSI/FAIR are presented and discussed. The relevance of these studies for the interpretation of results obtained from heavy ion reactions is elucidated on the example of the HADES results.
Permanent Link: http://hdl.handle.net/11104/0318744