A partial-wave analysis of the neutral 3π system produced in the reaction π−p → (π+π−π0) n at 12 and 15 GeV/c |
| |
| Authors: | MJ Corden JD Dowell J Garvey M Jobes IR Kenyon J Mawson T McMahon IF Corbett RJ Esterling NH Lipman PJ Litchfield KCTO Sumorok G Alexander S Dagan Y Gnat EH Bellamy MG Green N Harnew DH Thomas |
| |
| Institution: | University of Birmingham, UK;Rutherford Laboratory, Didcot, Oxon, UK;Westfield College, London, UK |
| |
| Abstract: | Data on the charge-exchange reaction π?p → (π+π?π0)n have been taken at beam momenta of 12 and 15 GeV/c, using the CERN Omega Multiparticle Spectrometer. A partial-wave analysis has been made of the (3π)0 system. We observe both natural and unnatural spin-parity production. The natural parity states can be identified with established resonances. In addition a natural spin-parity enhancement is observed at a mass of about 2 GeV/c2 with JP = 4+ preferred. We have called this effect the A21 (2030). The unnatural spin-parity production found is consistent with reggeized Deck model predictions. No unambiguous A1 or A3 production is observed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
