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

Abstract

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 3-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 +1.1 -0.9 +- 0.7 mub, that 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.

arXiv comment7 pages, 9 figures, 1 table

References in corpus (8)

• The High-Acceptance Dielectron Spectrometer HADES
• Partial Wave Analysis of the Reaction $p(3.5GeV)+p\to p{K}^{+}\Lambda$ to Search for the "$pp{K}^{-}$" Bound State
• Baryonic resonances close to the Kbar-N threshold: the case of Lambda(1405) in pp collisions
• Inclusive dielectron spectra in p+p collisions at 3.5 GeV
• Baryonic resonances close to the Kbar-N threshold: the case of Sigma(1385)^+ in pp collisions
• Production of Lambda and Sigma^0 hyperons in proton-proton collisions
• Associate K^0 production in p+p collisions at 3.5 GeV: The role of Delta(1232)++
• Production of Sigma{\pm}pi?pK+ in p+p reactions at 3.5 GeV beam energy

Cited by in corpus (3)

• Hadron multiplicities and chemical freeze-out conditions in proton-proton and nucleus-nucleus collisions
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• Deconfinement and freezeout boundaries in equilibrium thermal models