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Smyrski, J. [Author]; Adam, H.-H. [Author]; Khoukaz, A. [Author]; Klaja, P. [Author]; Moskal, P. [Author]; Oelert, W. [Author]; Piskor-Ignatowicz, C. [Author]; Przerwa, J. [Author]; Ritman, J. [Author]; Rozek, T. [Author]; Sefzick, T. [Author]; Siemaszko, M. [Author]; Budzanowski, A. [Author]; Täschner, A. [Author]; Winter, P. [Author]; Wolke, M. [Author]; Wüstner, P. [Author]; Zipper, W. [Author]; Czerwinski, E. [Author]; Czyzykiewicz, R. [Author]; Gil, D. [Author]; Grzonka, D. [Author]; Janusz, M. [Author]; Jarczyk, L. [Author];

Measurement of the dp -> He-3 eta reaction near threshold

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  • Media type: E-Article
  • Title: Measurement of the dp -> He-3 eta reaction near threshold
  • Contributor: Smyrski, J. [Author]; Adam, H.-H. [Author]; Khoukaz, A. [Author]; Klaja, P. [Author]; Moskal, P. [Author]; Oelert, W. [Author]; Piskor-Ignatowicz, C. [Author]; Przerwa, J. [Author]; Ritman, J. [Author]; Rozek, T. [Author]; Sefzick, T. [Author]; Siemaszko, M. [Author]; Budzanowski, A. [Author]; Täschner, A. [Author]; Winter, P. [Author]; Wolke, M. [Author]; Wüstner, P. [Author]; Zipper, W. [Author]; Czerwinski, E. [Author]; Czyzykiewicz, R. [Author]; Gil, D. [Author]; Grzonka, D. [Author]; Janusz, M. [Author]; Jarczyk, L. [Author];
  • imprint: North-Holland Publ., 2007
  • Published in: Physics letters / B 649, 258 - 262 (2007). doi:10.1016/j.physletb.2007.04.021
  • Language: English
  • DOI: https://doi.org/10.1016/j.physletb.2007.04.021
  • ISSN: 0370-2693
  • Keywords: eta nucleus: scattering length ; threshold ; Juelich COSY PS ; final-state interaction ; final state interaction ; eta-mesic nucleus ; eta: hadroproduction ; angular distribution: asymmetry ; magnetic spectrometer: experimental results ; meson production ; approx. 1.57 GeV/c/nucleon ; helium: nuclide ; channel cross section: energy dependence ; p deuteron: exclusive reaction ; deuteron p --> helium-3 eta
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  • Description: Total and differential cross sections for the dp -> He-3 eta reaction have been measured near threshold for He-3 center-of-mass momenta in the range from 17.1 MeV/c to 87.5 MeV/c. The data were taken during a slow ramping of the COSY internal deuteron beam scattered on a proton target detecting the He-3 ejectiles with the COSY-11 facility. The forward-backward asymmetries of the differential cross sections deviate clearly from zero for center-of-mass momenta above 50 MeV/c indicating the presence of higher partial waves in the final state. Below 50 MeV/c center-of-mass momenta a fit of the final state enhancement factor to the data of the total cross sections results in the He-3-eta scattering length of vertical bar a vertical bar = 4.3 +/- 0.5fm. (C) 2007 Elsevier B.V. All rights reserved.
  • Access State: Open Access