Summary
We have observed evidence of the interference between pairs of pions of the same charge produced in 4393 examples of the annihilation\(\overline p n \to 3\pi ^ - 2\pi ^ + \) between 1.0 and 1.6 GeV/c. A fit to the pion interference model by Kopylov and Podgoretsky yields a radius of interactionR=(1.23 ± 0.09) fm and a time of emission τ given bycτ=(1.44 +0.26−0.22 ) fm. The effect is also analysed in terms of the asymmetries in the opening- and azimuthal-angle distributions.
Riassunto
Abbiamo osservato prove di un effetto di interferenza tra coppie di pioni della stessa carica prodotti in 4393 esemplari di annichilazione\(\overline p n \to 3\pi ^ - 2\pi ^ + \) tra 1.0 e 1.6 GeV/c. Un confronto dei dati, mediante il metodo dei minimi quadrati, con il modello di interferenza tra i pioni di Kopylov e Podgoretsky fornisce per il raggio dell’interazione il valoreR=(1.23 ± 0.09) fm e per il tempo di emissione τ il valore dato dacτ=(1.44 +0.26−0.22 ) fm. L’effetto è stato anche analizzato sotto l’aspetto dell’asimmetrie nelle distribuzioni degli angoli di apertura e di azimut delle coppie.
Реэюме
Мы обнаружили подтверждение интерференции между парами пионов с одинаковыми эарядами, обраэованными в 4393 случаях аннигиляции\(\overline p n \to 3\pi ^ - 2\pi ^ + \) в области импульсов от 1.0 до 1.6 ГзВ/с. Подгонка к модели интерференции пионов, предложенной Копыловым и Подгорецким, дает радиус вэаимодействияR=(1.23±0.09) фм и время испускания т определяется величинойcτ=(1.44 +0.26−0.22 ) фм. Рассматриваемый зффект также аналиэируется в терминах асимметрий в распределениях апертурных углов и аэимутов пар.
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Borreani, G., Marchetto, F., Morrone, E. et al. Like-pion interference in\(\overline p n \to 3\pi ^ - 2\pi ^ + \) between 1.0 and 1.6 GeV/cbetween 1.0 and 1.6 GeV/c. Nuov Cim A 36, 245–257 (1976). https://doi.org/10.1007/BF02724578
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DOI: https://doi.org/10.1007/BF02724578