Observation of KNO scaling in the neutral energy spectra from αα and pp collisions at ISR energies

A. L.S. Angelis, G. Basini, H. J. Besch, R. E. Breedon, L. Camilleri, T. J. Chapin, C. Chasman, R. L. Cool, P. T. Cox, Ch Von Gagern, C. Grosso-Pilcher, D. S. Hannaxab, P. E. Haustein, B. M. Humphries, J. T. Linnemann, C. B. Newman-Holmes, R. B. Nickerson, J. W. Olness, N. Phinney, B. G. PopeS. H. Pordes, K. J. Powell, R. W. Rusack, C. W. Salgado, A. M. Segar, S. R. Stampke, M. Tanaka, M. J. Tannenbaum, P. Thieberger, J. M. Yelton

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Abstract

Neutral transverse energy spectra in pp and αα interactions are analyzed in terms of the wounded nucleon model. Analysis of the αα spectrum by application of a multiple nucleon-nucleon collision mechanism is conveniently performed when a gamma distribution is used to represent the pp spectral shape. The wounded nucleon model provides a reasonable description of the αα spectrum for the first three orders of magnitude, but completly fails to account for the slope of the high energy tail of the distribution. However, the pp and αα spectra can both be fitted to the same gamma distribution when scaled by their respective mean values and thus exhibit KNO scaling.

Original languageEnglish (US)
Pages (from-to)158-162
Number of pages5
JournalPhysics Letters B
Volume168
Issue number1-2
DOIs
StatePublished - Feb 27 1986

Bibliographical note

Funding Information:
Presenta ddress:L aboratoriN azionaled elI'INFN, 1-00044 Frascat(i Rome),I taly. 2 Present address: Enrico Fermi Institute, University of Chicago.5 540E llis, Chicago,I L 60637,U SA. ~ Present address: McGill University. Montreal, Quebec. CanadaH 3A 2T5. Presenat ddressF: NAL, Batavia,I L 60510,U SA. s Present address:L yman Laboratoryo f Physics, Harvard UniversityC, ambridgeM, A 02138,U SA. Presenat ddressS: LAC, StanfordC, A 94305.U SA. 7 This researchh asb eens upporteidn part by the US Depart-merito f Energyu nderC ontractD E-AC02-76CII00016.

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