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Mersmann, T. [Author]; Khoukaz, A. [Author]; Maeda, Y. [Author]; Mielke, M. [Author]; Mikirtychiants, S. [Author]; Ohm, H. [Author]; Papenbrock, M. [Author]; Prasuhn, D. [Author]; Rathmann, F. [Author]; Rausmann, T. [Author]; Schleichert, R. [Author]; Serdyuk, V. [Author]; Büscher, M. [Author]; Stein, H.-J. [Author]; Ströher, H. [Author]; Täschner, A. [Author]; Valdau, Yu. [Author]; Wilkin, C. [Author]; Wronska, A. [Author]; Chiladze, D. [Author]; Dymov, S. [Author]; Hartmann, M. [Author]; Hejny, V. [Author]; Kacharava, A. [Author]; [...]

Precision Study of the Eta3He System Using the dp->3HeEta Reaction

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  • Media type: E-Article
  • Title: Precision Study of the Eta3He System Using the dp->3HeEta Reaction
  • Contributor: Mersmann, T. [Author]; Khoukaz, A. [Author]; Maeda, Y. [Author]; Mielke, M. [Author]; Mikirtychiants, S. [Author]; Ohm, H. [Author]; Papenbrock, M. [Author]; Prasuhn, D. [Author]; Rathmann, F. [Author]; Rausmann, T. [Author]; Schleichert, R. [Author]; Serdyuk, V. [Author]; Büscher, M. [Author]; Stein, H.-J. [Author]; Ströher, H. [Author]; Täschner, A. [Author]; Valdau, Yu. [Author]; Wilkin, C. [Author]; Wronska, A. [Author]; Chiladze, D. [Author]; Dymov, S. [Author]; Hartmann, M. [Author]; Hejny, V. [Author]; Kacharava, A. [Author]; [...]
  • Published: APS, 2007
  • Published in: Physical review letters 98, 242301 (2007). doi:10.1103/PhysRevLett.98.242301
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevLett.98.242301
  • ISSN: 0031-9007
  • Keywords: magnetic spectrometer: experimental results ; eta nucleus: scattering length ; asymmetry: momentum dependence ; eta: hadroproduction ; partial wave ; threshold ; mass spectrum: missing-mass ; p deuteron: exclusive reaction ; deuteron p --> helium-3 eta ; helium: nuclide ; angular dependence ; channel cross section: energy dependence ; Juelich COSY PS
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  • Description: The differential and total cross sections for the dp -> He-3 eta reaction have been measured in a high precision high statistics COSY-ANKE experiment near threshold using a continuous beam energy ramp up to an excess energy Q of 11.3 MeV with essentially 100% acceptance. The kinematics allowed the mean value of Q to be determined to about 9 keV. Evidence is found for the effects of higher partial waves for Q greater than or similar to 4 MeV. The very rapid rise of the total cross section to its maximum value within 0.5 MeV of threshold implies a very large eta He-3 scattering length and hence the presence of a quasibound state extremely close to threshold.
  • Access State: Open Access