Summary
The authors generalize their previous results, by defining and calculating reaction and partial-process lifetimes, to the case of two-wave-packet collisions with an arbitrary number of final packets. Besides, they express the principle of causality and the new one of « anticausality » in terms of interaction time shifts. Some notes about tachyons are added.
Riassunto
Gli autori generalizzano loro precedenti risultati — definendo e calcolando i tempi di vita o le durate delle reazioni e dei processi parziali — al caso della collisione di due pacchetti d’onda con un numero arbitrario di pacchetti finali. Inoltre esprimono il principio di causalità e quello nuovo di « anticausalità » mediante itime-shifts delle interazioni. Infine aggiungono alcune note concernenti i tachioni.
Реэуме
Авторы обобшаут свои предыдушие реэулятаты посредством вычисления и определения времен протекания реакции и частичных процессов, в случае столкновения двух волновых пакетов с проиэволяным числом конечных пакетов. Кроме того, они выразаут принцип причинности и новыи принцип « антипричинности » череэ сдвиги времени вэаимодеиствия.
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References
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One possibility for their existence may be perhaps seen in the following « working hypothesis ». It is known that tachyons—if they exist—have a pure imaginary conventional « rest mass ». It is also well known that in the field of elementary-particle strong interactions (at high energies)virtual particles—which are usually supposed to be exchanged in « peripheral » processes and, for instance, to constitute the « clouds » surrounding baryons—must in general (except,e.g., for photon scattering!) possess, for kinematical reasons, a negative square momentum (see,e.g.,Verde, ref. (13)).
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E. Majorana:Nuovo Cimento,9, 335 (1932).
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On leave of absence from the Istituto di Fisica dell’Università di Milano, Milano, under an exchange program supported by the Istituto Nazionale di Fisica Nucleare, Sezione di Torino, and by the Ukrainian Academy of Sciences, Kiev.
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Olkhovsky, V.S., Recami, E. About collision-process lifetimes and causality. Nuovo Cimento A (1965-1970) 63, 814–826 (1969). https://doi.org/10.1007/BF02760741
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DOI: https://doi.org/10.1007/BF02760741