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Production of charmed particles at the CERN intersecting storage rings in events triggered by an electron

Authors:	J Irion H Seebrunner M Barone MM Block A Böhm R Campanini F Ceradini D Dibitonto KL Giboni D Hanna H Ludwig F Muller B Naroska F Navach M Nussbaum C Rubbia D Schinzel A Staude R Voss

Institution:	1. III. Physikalisches Institut der Technischen Hochschule, Aachen, Germany;2. CERN, Geneva, Switzerland;3. Harvard University, Department of Physics, Cambridge, MA, USA;4. Sektion Physik der Universität, Munich, Germany;5. Northwestern University, Evanston, IL, USA

Abstract:	Production of charmed particles has been investigated at √s = 63 GeV usi ng the Lampshade Magnet detector triggered by electrons and positrons emitted at 30% from the ISR beam axis. The results of a search for Λ_c and $Λ$ _c signals in the K^?pπ⁺ and K⁺ $p$ π^? channels are presented. Cross sections for the reactions pp → $D$ Λ_cX and pp → Λ_c $Λ$ _cX, and upper limits. for pp → D $D$ X, are evaluated under various models and compared with other values obtained at the ISR.

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