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Double Regge analysis of high-energy experiments producing three final particles

Двойной Редже анализ экспериментов при высоких энергиях с рождением трех частиц в конечном состоянии

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Il Nuovo Cimento A (1965-1970)

Summary

A general systematic analysis based on a double Regge model is suggested for high-energy hadron collisions producing three particles in the final state. It is intended only for events in the central region of the Dalitz plot where all two-particle invariant masses are high. The procedure is described in detail and applied to two existing experiments:A) π+p→π+π0p at 8 G GeV/c,B) π−p→K 01 01 n at 12 GeV/c. The results are encouraging.

Riassunto

Si suggerisce un’analisi sistematica generale delle collisioni adroniche di alta energia che producono tre particelle nello stato finale, basata su un doppio modello di Regge. È intesa solo per eventi nella regione centrale del diagramma di Dalitz dove tutte le masse invarianti di due particelle sono grandi. Si descrive dettagliatamente il procedimento e lo si applica a due esperimenti esistenti:A) π+p→π+π0p a 8 GeV/c,B) π−p→K 01 01 n a 12 GeV/c. I risultati sono incoraggianti.

Резюме

Предлагается общий систематический анализ, основанный на двойной Редзе модели для адронных соударений при высоких энергиях, сопровождающисся рождением трех частиц в конечном состоянии. Анализ предназначается толяко для сибытий в центральной части графика Далитца, где все двухчастичные инвариантные массы являются большими. Подробно описывается методика и применяется к двум существующим экспериментам:A) π+p→π+π0p при 8 гэВ/с,B) π−p→K 01 01 n при 12 ГэВ/с. Результаты ободряющие.

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Footnotes

  1. Chan Hong-Mo, K. Kajantie andG. Ranft:Nuovo Cimento,49 A., 157 (1967).

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  2. Aachen-Berlin-CERN collaboration:Nuovo Cimento,18 351 (1965).

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  3. CERN-ETHcollaboration: Berkeley Conference (1966).

  4. The statistics of this experiment are soon to be much improved.

  5. A parallel analysis of the π+π+n events from the same experiment has been attempted. The results are similar though quantitatively less satisfactory. We believe that there is here a large contamination due, for example, to resonance tails. The results are therefore not presented pending a more detailed analysis.

  6. See,e.g.,R. J. N. Phillips andW. Rarita:Phys. Rev.,139, B 1336 (1965). Little is known about the baryon trajectories. Our numbers for these are obtained simply by parallel extrapolation from the particles.

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  7. The values ofa andb determined from (A. 15) are too low and depend strongly on the control parameter μ, both of which facts are indicative of a sizeable background.

  8. The detection efficiency can vary by as much as a factor 5.

  9. The parameters for the ρ and A2 trajectories are well-known. See,e.g., ref. (6).R. J. N. Phillips andW. Rarita:Phys. Rev.,139, B 1336 (1965). The intercepts for K* and K** are obtained by parallel extrapolations.

  10. D. Amati, S. Fubini andA. Stanghelini:Nuovo Cimento,26, 896 (1962).

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  11. J. Joseph andH. Pilkuhn:Nuovo Cimento,33, 1407 (1964).

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  12. R. T. Deck:Phys. Rev. Lett.,13, 169 (1964).

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  13. We use here a definition of the “width” different from that given in the appendix of ref. (1). The present definition is more appropriate for a Gaussian peak.

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Traduzione a cura della Redazione.

Перевебено ребакцией.

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Hong-Mo, C., Kajantie, K., Ranft, G. et al. Double Regge analysis of high-energy experiments producing three final particles. Nuovo Cimento A (1965-1970) 51, 696–716 (1967). https://doi.org/10.1007/BF02721738

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  • DOI: https://doi.org/10.1007/BF02721738

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