Summary
The pion annihilation of antiproton-nucleon pairs in boundS-states (singlet and triplet) are analyzed taking into account conservation law and selection rules previously founded. With a statistical model for the valutation of transition matrix elements the ratio of three pion to two pion annihilation is calculated and, for the 3π annihilation, the angular distributions and energy spectrum of the final mesons. Finally some considerations are done about the annihilation of the pair from isotopic spin eigenstates.
Riassunto
Si studia l’annichilamento, in due e in tre mesoni π, di coppie antiprotone-nucleone in statoS (singoletto e tripletto). Con un modello di tipo statistico per il calcolo degli elementi di matrice per le transizioni, si valuta la relazione tra le sezioni d’urto per annichilamento in due e tre mesoni, e per quest’ultimo caso si ricavano le distribuzioni angolari e gli spettri energetici. Nel calcolo si tengono in conto le leggi di conservazione e le regole di selezione previamente trovate. Infine si fanno alcune considerazioni sulla possibilité di annichilamento di coppie in autostati dello spin isotopico.
Similar content being viewed by others
References
O. Chamberlain, E. Segrè, C. Wiegand andT. Ypsilantis:Phys. Rev.,100, 947 (1955).
J. M. Brabant, B. Cork, N. Horowitz, B. J. Moyer, J. J. Murray, R. Wallace andW. A. Wenzel:Phys. Rev.,101, 498 (1956).
E. Amaldi, C. Castagnoli, G. Cortini, C. Franzinetti andA. Manfbedini:Nuovo Cimento,1, 492 (1955);M. Teucher, H. Winzeler andE. Lohrmann:Nuovo Cimento,3, 228 (1956);O. Chamberlain, W. W. Chupp, G. Goldhaber, E. Segrè, C. Wiegand, E. Amaldi, G. Baroni, C. Castagnoli, C. Franzinetti andA. Manfredini:Nuovo Cimento,3, 447 (1956);R. D. Hill, S. D. Johnson andF. T. Gardner:Phxs Rev. 101, 907 (1956).
Presented byO. Chamberlain at theNew York meeting ot the American Physical Society of February 1956.
K. A. Johnson:Phys. Rev.,96, 1659 (1954).
H. P. Duerr andE. Teller:Phys. Rev.,101, 494 (1956).
See, for instance,R. E. Marshak:Meson Physics (New York, 1952), Chapter 5.
E. Fermi andE. Teller:Phys. Rev.,72, 399 (1947).
We thank Drs.L. M. Brown andM. Peshkin to have sent us their work prior to publication.
D. Amati andB. Vitale:Nuovo Cimento,2, 719 (1955). In the following we shall refer to this paper as A.
R. Gatto:Nuovo Cimento,3, 468 (1956).
E. Fermi:Progr. Theor. Phys.,5, 570 (1950).
E. Fabri:Nuovo Cimento,11, 479 (1954).
T. D. Lee andC. N. Yang,Nuovo Cimento 3, 749 (1956).
Author information
Authors and Affiliations
Additional information
An erratum to this article is available at http://dx.doi.org/10.1007/BF02823472.
Rights and permissions
About this article
Cite this article
Amati, D., Vitale, B. Erratum to: On the pion annihilation of nucleon-antiproton pairs. Nuovo Cim 3, 1411–1424 (1956). https://doi.org/10.1007/BF02785017
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02785017