Summary
Formation of 4Λ H hypernucleus from stopped K− on4He,7Li,9Be,12C,16O and40Ca was studied by detecting π− from the two-body decay of 4Λ H, 4Λ H→He+π−. The formation probabilities of 4Λ H per stopped K− on these target nuclei were measured. From the coincidence measurement with π0 and π±, we found that the 4Λ H hyperfragment formation onA>4 nuclei cannot be accounted for by the direct reaction onα cluster,4He(K−, π0) 4Λ H, alone.
Riassunto
Si studia la formazione dell’ipernucleo 4Λ H da K− assorbito a riposo su4He,7Li,9Be,12C,16O e40Ca rivelando π− dal decadimento a due corpi di 4Λ H→He+π−. Si misurano le probabilità di formazione di 4Λ H mediante K− assorbito a riposo su questi nuclei bersaglio. Dalle misure di coincidenza con π0 e π±, si trova che la formazione di iperframmenti 4Λ H su nucleiA>4 non si può spiegare solo con la reazione diretta su clusterα,4He(K−, π0) 4Λ H.
Реэюме
Исследуется обраэование гиперядер 4Λ H при поглошении остановивщегося K− в мищенях4He,7Li,9Be,12C,16O и40Ca. Исследование гиперядер 4Λ H основано на детектировании π− иэ двух-частичного распада 4Λ H→He+π−. Иэмеряются вероятности обраэования 4Λ H на один остановивщийся K− в укаэанных выще ядрах. Иэ иэмерений совпадений с π0 и π± мы получаем, что обраэование гиперфрагмента 4Λ H наA>4 не может быть общяснено с помошью только прямой реакции на α-кластере,4He(K−, π0) 4Λ H.
Similar content being viewed by others
Literatur
See, for example,D. H. Davis andJ. Sacton:High Energy Physics, Vol. II, edited byE. H. S. Burhop (Academic Press, New York, N.Y., 1967) p. 365.
See, for example,M. Csejthey-Barth, G. Schorochoff andP. Van Binst:Nucl. Phys. B,14, 330 (1969).
H. Tamura: Thesis, University of Tokyo, 1988.
M. Juric, G. Bohm, J. Klabuhn, U. Krecker, F. Wysotzki, G. Coremans-Bertrand, J. Sacton, G. Wilquet, T. Cantwell, F. Esmael, A. Montwill, D. H. Davis, D. Kielczewska, T. Pniewski, T. Tymieniecka andJ. Zakrewski:Nucl. Phys. B,52, 1 (1973).
G. Bohm, J. Klabuhn, U. Krecker, F. Wysotzki, G. Coremans, W. Gajewley, C. Mayeur, J. Sacton, P. Vilain, G. Wilquet, D. O’Sullivan, D. Stanley, D. H. Davis, E. R. Fletcher, S. P. Lovell, N. C. Roy, J. H. Wickens, A. Filipkowski, K. Garbowska-Pniewska, T. Pniewski, E. Skyrzypczak, T. Sobczak, J. E. Allen, V. A. Bull, A. P. Conway, A. Fishwick andP. V. March:Nucl. Phys. B,4, 511 (1968).
M. M. Block et al.:Proceeding of International Conference on Hyperfragments St. Cergue (1964), CERN report 64-1, p. 63.
R. H. Dalitz andL. Liu:Phys. Rev.,116, 1312 (1959).
D. Bertrand, G. Coremans, C. Mayeur, J. Sacton, P. Vilain, G. Wilquet, J. H. Wickens, D. O’Sullivan, D. H. Davis, J. E. Allen:Nucl. Phys. B,16, 77 (1970).
D. Abeledo, L. Choy, R. G. Ammar, N. Crayton, R. Levi Setti, M. Raymund andO. Skjeggestad:Nuovo Cimento,22, 1171 (1961).
D. H. Davis: private communication.
T. Yamazaki: INS-Rep.-658 (Nov. 1987);Nuovo Cimento, in press.
H. Tamura, T. Yamazaki, M. Sano, Y. Yamamoto, M. Wakai andH. Bando: INS-REP.-686 (June 1988); to be published.
Author information
Authors and Affiliations
Additional information
To speed up publication, the proofs were not sent to the authors and were supervised by the Scientific Committee.
Work supported by the Grant-in-Aid for Encouragement of Young Scientists of the Japan Ministry of Education, Science and Culture.
Work supported by Bundesministerium für Forschung und Technologie.
This work is partially supported by the Grant-in-Aid for Speical Project Research on Meson Science of the Japan Ministry of Education, Science and Culture.
Rights and permissions
About this article
Cite this article
Tamura, H., Hayano, R.S., Ishikawa, T. et al. 4Λ H formation from K− absorption at rest on4He,7Li,9Be,12C,16O and40Ca targetsformation from K− absorption at rest on4He,7Li,9Be,12C,16O and40Ca targets. Nuov Cim A 102, 575–582 (1989). https://doi.org/10.1007/BF02734875
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02734875