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Singularity analysis ofN-body scattering wave functions

Анализ сингулярностей для волновых функцийN-частичного рассеяния

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Il Nuovo Cimento A (1965-1970)

Summary

A thorough singularity analysis of scattering wave functions in theN-body problem is carried out. Operating on the basic Lippmann-Schwinger-Glöckle-Tobocman equations and resorting to a general reversion property for linked-cluster strings of channel resolvents and interactions, we explicitly exhibit the sources of the primary singularities ofN-body scattering wave functions. We introduce complete sets of eigenstates of the two-cluster channel Hamiltonians and we arrive at momentum-space representations for two-cluster wave function components, where all the primary singularities appear in separate terms. By means of simple algebraic procedures we show that appropriate sums of the residues at the physical poles lead to the physical transition amplitudes for elastic/rearrangement, partial and total break-up processes.

Riassunto

In questo lavoro si compie un'analisi completa e dettagliata delle singolarità presenti nelle funzioni d'onda di scattering per il problema aN corpi. Mediante opportune transformazioni delle equazioni di Lippmann-Schwinger-Glöckle-Tobocman, e ricorrendo a una proprietà generale d'inversione per operatori costituiti da risolventi e interazioni, sono messe in evidenza le sorgenti delle singolarità primarie delle funzioni d'onda di scattering aN corpi. Si utilizzano sistemi di base di autostati degli hamiltoniani di canale per partizioni a due «cluster» e si arriva ad opportune rappresentazioni nello spazio dei momenti delle componenti a due «cluster» delle funzioni d'onda, nelle quali tutte le singolarità primarie appaiono in termini distinti. Per mezzo di semplici procedimenti algebrici si mostra che le ampiezze fisiche di transizione (per processi elastici, di riarrangiamento e di frammentazione, sia parziale che totale) si possono ottenere sommando opportunamente i resiiui delle funzioni d'onda ai poli fisici.

Резюме

Проводится анализ сингулярност∈й волновых функций рассеяния в проблемеN-тел. На основе уравнений Линпманна-Швингера-Глёкля-Тобокмана и, используя общее свойство обращения для связанных кластерных струн резольвент и взаимодействий, мы в явном виде показываем источники первичных сингулярностей волновых функцийN-частичного рассеяния. Мы вводим полную систему собственных состояний для двухкластерных Гамильтонианов и приходим к импульсно-координатным представлениям для компонент двухкластерных волновых функций, где все первичные сингулрности появляются в отдельных членах. С помощью простых алгебраических процедур мы показываем, что соответстующие суммы вычетов в физических полюсах приводят к амплитудам физических переходов для упругой перегруппировки, парциальных и полных процессов раснпада.

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References

  1. W. Sandhas: inFew-Body Nuclear Physics, edited by IAEA (Vienna, 1978), p. 3.

  2. V. Vanzani: inFew-Body Nuclear Physics, edited by IAEA (Vienna, 1978), p. 57.

  3. Gy. Bencze: inFew-Body Nuclear Physics, edited by IAEA (Vienna, 1978), p. 113;GY. Bencze andE. F. Redish:Journ. Math. Phys.,19, 1909 (1978).

  4. C. Chandler andA. G. Gibson:Journ. Math. Phys.,18, 2336 (1977);19, 1610 (1978).

    Article  MathSciNet  ADS  Google Scholar 

  5. I. M. Sigal:Scattering theory for many-particle systems.— I:Theory of abstract multichannel systems, preprint E.T.H. (Zürich, 1977);Scattering theory for multiparticle systems.— II:Regularizers and their estimates, preprint E.T.H. (Zürich, 1978).

  6. K. L. Kowalski: inFew-Body Systems and Nuclear Forces, edited byH. Zingl, M. Haftel andH. Zankel, Vol.2 (Berlin, 1978), p. 393.

  7. J. Schwager:Ann. Phys.,98, 14 (1976).

    Article  ADS  Google Scholar 

  8. T. Sasakawa:Phys. Rev. C,13, 1801 (1976);Suppl. Prog.Theor. Phys.,61, 149 (1977).

    Article  ADS  Google Scholar 

  9. E. F. Redish, P. C. Tandy andM. L'Hullier:Phys. Lett.,61 B, 413 (1976);M. L'Huillier, E. F. Redish andP. C. Tandy:Journ. Math. Phys.,19, 1276 (1978).

    Article  ADS  Google Scholar 

  10. V. Vanzani: inFew-Body Systems and Nuclear Forces, edited byH. Zingl, M. Haftel andH. Zankel, Vol.1 (Berlin, 1978), p. 360.

  11. W. Glöckle:Nucl. Phys.,141 A, 620 (1970).

    Article  ADS  Google Scholar 

  12. W. Tobocman:Phys. Rev. C,11, 43 (1975).

    Article  ADS  Google Scholar 

  13. W. Sandhas: inFew-Body Dynamics, edited byA. N. Mitra, I. Slaus, V. S. Bhasin andV. K. Gupta (Amsterdam, 1976), p. 540.

  14. G. Cattapan andV. Vanzani:Phys. Rev. C,19, 1168 (1979).

    Article  ADS  Google Scholar 

  15. G. Cattapan andV. Vanzani:Lett. Nuovo Cimento,24, 391 (1979).

    Article  MATH  Google Scholar 

  16. G. Cattapan andV. Vanzani:Nuovo Cimento,50 A, 97 (1979).

    Article  MathSciNet  ADS  Google Scholar 

  17. B. R. Karlsson andE. M. Zeiger:Phys. Rev. D,11, 939 (1975).

    Article  ADS  Google Scholar 

  18. B. R. Karlsson andE. M. Zeiger:Phys. Rev. D,16, 2253 (1977).

    Article  ADS  Google Scholar 

  19. P. Benoist-Gueutal:Phys. Lett.,56 B, 413 (1975).

    Article  MathSciNet  ADS  Google Scholar 

  20. Gy. Bencze:Phys. Lett.,72 B, 155 (1977);M. Abramowitz andI. A. Stegun:Handbook of Mathematical Functions (New York, N. Y., 1965), p. 824.

    Article  ADS  Google Scholar 

  21. S. Weinberg:Phys. Rev.,133, B 232 (1964);C. Van Winter:Mat. Fys. Skr. Dan. Vid. Selsk.,2, No. 8 (1964).

    Article  MathSciNet  ADS  Google Scholar 

  22. W. Hunziker:Helv. Phys. Acta,39, 451 (1966);Acta Phys. Austr. Suppl.,17, 43 (1977).

    MathSciNet  MATH  Google Scholar 

  23. V. Vanzani:The problem of spurious solutions in N-body theories, contribution to theSummer Meeting on Few-Body Nuclear Physics (Uppsala, 1977) and IFPD Report 7/77 (Padova, June 1977); see alsoLett. Nuovo Cimento,23, 586 (1978).

  24. E. O. Alt, P. Grassberger andW. Sandhas:Nucl. Phys.,2 B, 167 (1967);P. Grassberger andW. Sandhas:Nucl. Phys.,2 B, 181 (1967).

    Article  ADS  Google Scholar 

  25. V. Vanzani:Nuovo Cimento,2 A, 525 (1971);Lett. Nuovo Cimento,16, 1 (1976).

    Article  MathSciNet  ADS  Google Scholar 

  26. P. Benoist-Gueutal, M. L'Huillier, E. F. Redish andP. C. Tandy:Phys. Rev. C,17, 1924 (1978).

    Article  MathSciNet  ADS  Google Scholar 

  27. V. Vanzani: inHeavy-Ion, High-Spin States and Nuclear Structure, edited by IAEA, Vol.2 (Vienna, 1975), p. 287.

  28. V. Vanzani:Lett. Nuovo Cimento,10, 610 (1974).

    Article  Google Scholar 

  29. M. L'Huillier, E. Redish andP. C. Tandy: preprint University of Maryland TR 76-068 (1975).

  30. W. Glöckle: inThe Nuclear Many-Body Problem, edited byF. Calogero andC. Ciofi Degli Atti (Bologna, 1974), p. 349.

  31. V. Vanzani:Nuovo Cimento,16 A, 449 (1973).

    Article  ADS  Google Scholar 

  32. V. E. Kuzmichev: inFew-Body Nuclear Physics, edited by IAEA (Vienna, 1978), p. 161.

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Partially supported by Ministero della Pubblica Istruzione, Italy.

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Cattapan, G., Vanzani, V. Singularity analysis ofN-body scattering wave functions. Nuov Cim A 51, 509–531 (1979). https://doi.org/10.1007/BF02776496

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