Summary
We extend the study of one-particle inclusive spectra within the framework of the thermodynamical model, with particular assumptions, to neutral particles (n, Λ, K 01 , π0, γ). With at most one free parameter for each spectrum we obtain good agreement with the data except for the γ-spectra. Gamma production is described as proceeding via π0 decay, without a free parameter, and the good agreement observed at 24 GeV/c is surprisingly lost at ISR energies. If the present γ data at ISR energies were confirmed, it would be difficult to explain this single disagreement within our assumptions.
Riassunto
Si estende lo studio degli spettri inclusivi di una particella nello schema del modello termodinamico, con particolari ipotesi, alle particelle neutre (n, Λ, K 01 , π0, γ). Con un parametro libero, al massimo, per ogni spettro si ottiene un buon accordo con i dati, salvo che per gli spettri γ. Si descrive la produzione di raggi gamma come se avvenisse tramite il decadimento del π0, senza parametro libero, ed il buon accordo osservato a 24 GeV/c inaspettatamente si perde alle energie degli ISR. Se gli attuali dati dei raggi γ alle energie degli ISR fossero confermati, sarebbe difficile spiegare sulla base delle nostre ipotesi questo singolo disaccordo.
Реэюме
Мы обобшаем исследование одночастичных инклюэивных спектров в рамках термодинамической модели с конкретными предположениями на случай нейтральных частиц (n, Λ, K 01 , π0, γ). Испольэуя в лучщем случае один свободный параметр, мы получаем хорощее согласие с зкспериментальными данными, эа исключением γ-спектра. Гамма-рождение описывается как процесс, происходяший череэ π0 распад, беэ испольэования свободного параметра, и хорощее согласие, наблюдаемое при 24ГзB/c, неожиданным обраэом исчеэает при IS R знергиях. Если настояшие γ-данные при ISR знергиях подтвердятся, то будет трудно общяснить зто единственное расхождение в рамках нащих предположений.
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Note: The peaks atx=0 in Fig. 4, 5, 7, 8, 9 of our previous article:Inclusive thermodynamical spectra in the range 19to 1500 Gev/c (Nuovo Cimento,13 A, 557 (1973)) are spurious and due to a lack of precision in numerical integrations in the curve-drawing computer program. When the integrals are performed with enough precision the peaks desappear and the dips in all these figures take place atx=0. The correct figures are available from the authors on request.
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Letessier, J., Tounsi, A. Inclusive thermodynamical spectra of neutral particles. Nuov Cim A 15, 358–370 (1973). https://doi.org/10.1007/BF02734677
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DOI: https://doi.org/10.1007/BF02734677