K*(892)(+) production in proton-proton collisions at E-beam=3.5 GeV

0448269 - ÚJF 2016 RIV US eng J - Journal Article
Agakishiev, G. - Arnold, O. - Belver, D. - Krása, Antonín - Křížek, Filip - Kugler, Andrej - Sobolev, Yuri, G. - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … Total 98 authors
K*(892)(+) production in proton-proton collisions at E-beam=3.5 GeV.
Physical Review. C. Roč. 92, č. 2 (2015), 024903. ISSN 0556-2813
R&D Projects: GA ČR GA13-06759S
Institutional support: RVO:61389005
Keywords : HADES collaboration * beam energy * mesons
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.146, year: 2015

We present results on the K*(892)(+) production in proton-proton collisions at a beam energy of E = 3.5 GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon-nucleon reactions. The data are interpreted within a two-channel model that includes the three-body production of K*(892)(+) associated with the Lambda or Sigma hyperon. The relative contributions of both channels are estimated. Besides the total cross section sigma(p + p -> K*(892)(+) + X) = 9.5 +/- 0.9(-0.9)(+1.1) +/- 0.7 mu b, which adds a new data point to the excitation function of the K*(892)+ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of K*(892)(+) are discussed as well in terms of the spin-alignment.
Permanent Link: http://hdl.handle.net/11104/0250019