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Nekipelov, M. [Author]; Büscher, M. [Author]; Ströher, H. [Author]; Valdau, Yu. [Author]; Hartmann, M. [Author]; Keshelashvili, I. [Author]; Kleber, V. [Author]; Koptev, V. [Author]; Maeda, Y. [Author]; Mikirtychiants, S. [Author]; Schleichert, R. [Author]; Sibirtsev, A. [Author]

Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark

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  • Media type: E-Article
  • Title: Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark
  • Contributor: Nekipelov, M. [Author]; Büscher, M. [Author]; Ströher, H. [Author]; Valdau, Yu. [Author]; Hartmann, M. [Author]; Keshelashvili, I. [Author]; Kleber, V. [Author]; Koptev, V. [Author]; Maeda, Y. [Author]; Mikirtychiants, S. [Author]; Schleichert, R. [Author]; Sibirtsev, A. [Author]
  • imprint: IOP Publ., 2007
  • Published in: Journal of physics / G 34, 627 - 635 (2007). doi:10.1088/0954-3899/34/4/002
  • Language: English
  • DOI: https://doi.org/10.1088/0954-3899/34/4/002
  • ISSN: 0954-3899
  • Keywords: p p --> Lambda p K0 pi+ ; 3.65 GeV/c ; channel cross section: momentum dependence ; pi+: associated production ; magnetic spectrometer: experimental results ; pentaquark: search for ; upper limit ; Delta(1232)++: intermediate state ; Theta(1540): hadroproduction ; Juelich COSY PS ; Lambda: hadroproduction ; mass spectrum: missing-mass ; K0: associated production ; p p: exclusive reaction
  • Origination:
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  • Description: The reaction pp -> pK(0)pi(+) Lambda has been studied with the ANKE spectrometer at COSY-Julich at a beam momentum of 3.65 GeV/c in order to search for a possible signal of the pentaquark Theta(+)( 1540), decaying into the pK(0) system. By detecting four charged particles in the final state (pi(+), pi(-) and two protons), the K-0 and the Lambda have been reconstructed to tag strangeness production. It has been found that the pi(+)Lambda missing-mass spectrum displays no significant signal expected from the Theta(+)(1540) excitation. The total cross section for the reaction pp -> pK(0)pi(+) Lambda has been deduced, as well as an upper limit for the Theta(+) production cross section. The intermediate Delta K-++(0) Lambda state seems to provide a significant contribution to the reaction.
  • Access State: Open Access