Production of ρ0 and f in π-p interactions at 16 GeV/c and separation into fragmentation and central components

J. Bartke, H. Kirk, P. Sixel, H. Nowak, M. Walter, K. Böckmann, J. Lowsky, R. Roedel, G. Zobernig, V. T. Cocconi, M. J. Counihan, G. Kellner, P. K. Malhotra, D. R.O. Morrison, H. Saarikko, E. Leitner, J. Stiewe, T. Coghen, A. Guła, H. AbramowiczA. Zieminski

Research output: Contribution to journalArticlepeer-review

Abstract

The production of ρ0(770) and f(1270) is studied in π-p interactions at 16 GeV/c. By comparison with inclusive K*0 production in the reaction K-p → K*0 + anything, and with inclusive ρ0 production in the reaction pp → ρ0 + anything, it is found that the data can be interpreted in terms of two production processes: the central production of resonances and the fragmentation of the beam particle. For the π-p reaction, the inclusive ρ0 beam fragmentation cross section is 3.1 ± 0.3 mb while that for central production is 1.6 ± 0.5 mb. The ρ0 central production cross section is consistent with increasing with energy as ln s behaviour. The ratio of ρ0 to π- inclusive cross sections (excluding the leading π-) is ∼0.2, independent of energy. The ρ0 to π- ratio increases as a function of pT to a constant value of ∼ 1 2 above 1 GeV/c. The ρ (charged and neutral) and f decays account for (25 ± 4)% and (1.4 ± 0.3)%, respectively, of all pions produced.

Original languageEnglish
Pages (from-to)93-117
Number of pages25
JournalNuclear Physics, Section B
Volume107
Issue number1
DOIs
StatePublished - 26 Apr 1976

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