Approach to scaling in inclusive π+/π− ratios at 147 GeV/c

Approach to scaling in inclusive π+/π− ratios at 147 GeV/c

D. Brick,H. Rudnicka,A. M. Shapiro,M. Widgoff,R. E. Ansorge,W. W. Neale,D. R. Ward,B. M. Whyman,R. A. Burnstein,H. A. Rubin,E. D. Alyea,L. Bachman,C. Y. Chien,P. Lucas,A. Pevsner,J. T. Bober,R. Dolfini,T. A. J. Frank,E. S. Hafen,P. Haridas,D. Huang,R. I. Hulsizer,V. Kistiakowsky,P. Lutz,S. H. Oh,I. A. Pless,T. B. Stoughton,V. Suchorebrow,S. Tether,P. C. Trepagnier,Y. Wu,R. K. Yamamoto,F. Grard,J. Hanton,V. Henri,P. Herquet,J. M. Lesceux,P. Pilette,R. Windmolders,H. De Bock,F. Crijns,W. Kittel,Wesley Metzger,C. Pols,M. Schouten,R. Van De Walle,H. O. Cohn,G. Bressi,E. Calligarich,C. Castoldi,S. Ratti,R. DiMarco,P. F. Jacques,M. Kalelkar,R. J. Plano,P. Stamer,T. L. Watts,E. B. Brucker,E. L. Koller,S. Taylor,L. Berny,S. Dado,J. Goldberg,S. Toaff,G. Alexander,O. Benary,J. Grunhaus,R. Heifetz,A. Levy,W. M. Bugg,G. T. Condo,T. Handler,E. L. Hart,A. H. Rogers,Y. Eisenberg,D. Hochman,U. Karshon,E. E. Ronat,A. Shapira,R. Yaari,G. Yekutieli,T. W. Ludlam,R. Steiner,H. D. Taft;D. Brick;H. Rudnicka;A. M. Shapiro;M. Widgoff;R. E. Ansorge;W. W. Neale;D. R. Ward;B. M. Whyman;R. A. Burnstein;H. A. Rubin;E. D. Alyea;L. Bachman;C. Y. Chien;P. Lucas;A. Pevsner;J. T. Bober;R. Dolfini;T. A. J. Frank;E. S. Hafen;P. Haridas;D. Huang;R. I. Hulsizer;V. Kistiakowsky;P. Lutz;S. H. Oh;I. A. Pless;T. B. Stoughton;V. Suchorebrow;S. Tether;P. C. Trepagnier;Y. Wu;R. K. Yamamoto;F. Grard;J. Hanton;V. Henri;P. Herquet;J. M. Lesceux;P. Pilette;R. Windmolders;H. De Bock;F. Crijns;W. Kittel;Wesley Metzger;C. Pols;M. Schouten;R. Van De Walle;H. O. Cohn;G. Bressi;E. Calligarich;C. Castoldi;S. Ratti;R. DiMarco;P. F. Jacques;M. Kalelkar;R. J. Plano;P. Stamer;T. L. Watts;E. B. Brucker;E. L. Koller;S. Taylor;L. Berny;S. Dado;J. Goldberg;S. Toaff;G. Alexander;O. Benary;J. Grunhaus;R. Heifetz;A. Levy;W. M. Bugg;G. T. Condo;T. Handler;E. L. Hart;A. H. Rogers;Y. Eisenberg;D. Hochman;U. Karshon;E. E. Ronat;A. Shapira;R. Yaari;G. Yekutieli;T. W. Ludlam;R. Steiner;H. D. Taft;
the european physical journal c 1982 Vol. 13 pp. 11-17
165
taft1982theapproach

Abstract

The ratio of hadronic π+/π− production has been studied in the target fragmentation region of π+p, π−p,K+p andp p collisions at 147 GeV/c beam momentum. The difference between this ratio in the π+p and π−p data is less than at lower energies but still present. No difference exists anymore for the π+/π− ratio at this energy betweenK+p andpp collisions. Exclusion of diffraction dissociation and resonance production does not change the main conclusions. The energy dependence of the ratio for π+p and π−p collisions gives evidence for a universal asymptotic ratio for all beams. Thept -dependence at low-pt is in agreement with the expectation from geometrical correlation of the valence quarks.

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