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.
Keywords
Cite
@article{arxiv.1505.06184,
title = {K*(892)+ production in proton-proton collisions at E_beam = 3.5 GeV},
author = {HADES Collaboration and G. Agakishiev and O. Arnold and D. Belver and A. Belyaev and J. C. Berger-Chen and A. Blanco and M. Böhmer and J. L. Boyard and P. Cabanelas and S. Chernenko and A. Dybczak and E. Epple and L. Fabbietti and O. Fateev and P. Finocchiaro and P. Fonte and J. Friese and I. Fröhlich and T. Galatyuk and J. A. Garzón and R. Gernhäuser and K. Göbel and M. Golubeva and D. González-Díaz and F. Guber and M. Gumberidze and T. Heinz and T. Hennino and R. Holzmann and A. Ierusalimov and I. Iori and A. Ivashkin and M. Jurkovic and B. Kämpfer and T. Karavicheva and I. Koenig and W. Koenig and B. W. Kolb and G. Korcyl and G. Kornakov and R. Kotte and A. Krása and F. Krizek and R. Krücken and H. Kuc and W. Kühn and A. Kugler and T. Kunz and A. Kurepin and V. Ladygin and R. Lalik and K. Lapidus and A. Lebedev and L. Lopes and M. Lorenz and L. Maier and A. Mangiarotti and J. Markert and V. Metag and J. Michel and D. Mihaylov and C. Müntz and R. Münzer and L. Naumann and Y. C. Pachmayer and M. Palka and Y. Parpottas and V. Pechenov and O. Pechenova and J. Pietraszko and W. Przygoda and B. Ramstein and A. Reshetin and A. Rustamov and A. Sadovsky and P. Salabura and A. Schmah and E. Schwab and J. Siebenson and Yu. G. Sobolev and S. Spataro and B. Spruck and H. Ströbele and J. Stroth and C. Sturm and O. Svoboda and A. Tarantola and K. Teilab and P. Tlusty and M. Traxler and H. Tsertos and T. Vasiliev and V. Wagner and M. Weber and C. Wendisch and J. Wüstenfeld and S. Yurevich and Y. Zanevsky},
journal= {arXiv preprint arXiv:1505.06184},
year = {2016}
}
Comments
7 pages, 9 figures, 1 table