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High-pT two-body correlations and single-particle inclusive hadron spectra in 24 GeV proton-nucleus collisions

Двух-частичные корре ляции при больших рT, и одно-частичные инклю зивные адронные спектры в случае соуд арений протонов с эне ргией 24 ГэВ с ядрами

  • Published:
Il Nuovo Cimento A (1965-1970)

Summary

Results are presented on inclusive spectra of π±, K+- and p+- produced in 24 GeV p12C collisions near θc.m. = 90° in the transverse-momentum range 0.49<pT< 2.55 GeV/c; correlations between particles of opposite charges, emitted in opposite directions at θc.m.= ±90° in the range 0.16≤pT≤2.15 GeV/c have been measured through a biasfree experimental method. The correlations as a function of pT orM, the invariant mass of the particle pair, do not show any significant resonance structure. In the K+K+ case the magnitude of the correlation coefficient is six times larger than in the θ+K- one. Such a ratio relevant to strangeness correlation between particles with opposite pc.m. was not observed before.

Riassunto

Si presentano i risultati sugli spettri inclusivi di π+-,K+- e p+- prodotti in collisioni p12C a 24 GeV vicino a θc.m. = 90° nell’intervallo dell’impulso trasversale 0.49<pT< < 2.55 GeV/c; si sono misurate le correlazioni fra particelle con cariche opposte emesse in direzioni opposte a μc.m. = ±90° nell’intervallo 0.16 <pT< 2.15 GeV/o con un metodo sperimentale privo di errori sistematici. Le correlazioni in funzione di pT oM, la massa invariante della coppia di particelle, non mostrano alcuna struttura di risonanza significativa. Nel caso di K+K- il valore del coefficiente di correlazione è sei volte maggiore di quello nel caso di θ+K-. Questo rapporto relativo alla correla zione di stranezza fra particelle con p(c.m.) opposto non era stato osservato prima.

Резюме

Приводятся результа ты для инклюзивных спектров π±, К±и р+обра зованных при соударениях прот онов с энергией 24 ГэВ12С , вблизи θщm=90° в области поперечных импульсов 0.49 < рT< 2.55 ГэВ/с. Бы ли измерены корреляции между частицами разн оименных зарядов, исп ущенных в противоположных нап равлениях при θим= ±90° области 0.16≤ pт≤2.15 ГэВ/с. Корреляции, как функция рt или М, инвариантной массы пары частиц, не обнаруживают какой-л ибо существенной резона нсной структуры. В слу чае К+К- величина коэффициен та корреляции в шесть раз больше, чем в случае π+К-. Такое отн ошение, относящееся к корреляции страннос ти между частицами с противоположным рnцм, ранее не наблюдалось.

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Authors and Affiliations

  1. Schweizerischer Institut für Nuklearforschung, Villigen, Switzerland

    J. Jansen

  2. Université Libre de Bruxelles, Belgium

    P. Vilain (CEEN fellow)

  3. Centre d’Etudes Nucléaires, Grenoble, France

    A. Yaouanc

Authors
  1. A. Bamberger
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  2. F. Binon
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  3. C. Bricman
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  4. H. Brüning
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  5. P. Ditteil
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  6. M. Gouanère
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  7. E. Hartung
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  8. J. Jansen
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  9. J. P. Lagnaux
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  10. G. Massas
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  11. J. P. Peigneux
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  12. D. Sillou
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  13. M. Spighel
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  14. J. P. Stroot
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  15. P. Vilain
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  16. A. Yaouanc
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Annecy (LAPP)-Belgium (IISN)-Freiburg Collaboration

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This work was supported by the Bundesministerium für Forschung und Technologie.

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Annecy (LAPP)-Belgium (IISN)-Freiburg Collaboration., Bamberger, A., Binon, F. et al. High-pT two-body correlations and single-particle inclusive hadron spectra in 24 GeV proton-nucleus collisions. Nuov Cim A 62, 327–359 (1981). https://doi.org/10.1007/BF02770974

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