Journal ArticleDOI
Reactions pd → 3 He η and pd → 3 He π + π − near the η threshold
B. Mayer,A. Boudard,B. Fabbro,M. Garçon,C. Kerboul,J. Poitou,F. Wellers,W. W. Jacobs,J. Saudinos,Egle Tomasi-Gustafsson,J.P. Mouly,R. S. Kessler,B. M. K. Nefkens,B. Tippens,A. van der Schaaf,R. Abegg,W. T. H. van Oers,W. J. Briscoe,A. M. Petrov,A. Moalem +19 more
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TLDR
In this article, the SPES2 spectrometer was used to investigate rare {eta} decays with the presence of strong final state interaction, and the angular distribution is nearly isotropic, consistent with {ital S} wave production.Abstract:
The reaction {ital pd}{r_arrow}{sup 3}He{eta} has been studied with the SPES2 spectrometer, for proton energies between 0.2 MeV and 11 MeV above threshold. The total cross section rises from 0.25 to 0.40 {mu}b in this region. The observed energy dependence can be attributed to the strong final state interaction. The angular distribution is nearly isotropic, consistent with {ital S} wave production. A measurement of the {ital pd}{r_arrow}{sup 3}He{pi}{sup +}{pi}{sup {minus}} cross section in the threshold region is also presented. The setup, which is capable of producing 10{sup 5} tagged {eta}/s with only a few percent background, is used to investigate rare {eta} decays. {copyright} {ital 1996 The American Physical Society.}read more
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Journal ArticleDOI
Energy levels of light nuclei A=11☆
J. H. Kelley,J. H. Kelley,E. Kwan,E. Kwan,J.E. Purcell,J.E. Purcell,C.G. Sheu,C.G. Sheu,H. R. Weller,H. R. Weller +9 more
TL;DR: A review of evidence on the properties of the A = 11 nuclei is given in this paper, with emphasis on the material leading to information about the structure of the a = 11 systems.
Journal ArticleDOI
Meson production in nucleon-nucleon collisions close to the threshold
TL;DR: In this paper, the authors review the status of the present theoretical understanding of nucleon-nucleon reactions with special emphasis on model-independent methods and discuss the physical questions that can be addressed by studying them in the various reaction channels.
Journal ArticleDOI
Precision study of the eta He-3 system using the dp ---> He-3 eta reaction
T. Mersmann,A. Khoukaz,Markus Büscher,D. Chiladze,S. Dymov,M. Hartmann,V. Hejny,A.K. Kacharava,I. Keshelashvili,P. Kulessa,Y. Maeda,M. Mielke,S. Mikirtychiants,H. Ohm,M. Papenbrock,D. Prasuhn,F. Rathmann,T. Rausmann,R. Schleichert,V. Serdyuk,H. J. Stein,H. Ströher,A. Täschner,Yu. Valdau,Colin Wilkin,Aleksandra Wrońska +25 more
TL;DR: In this paper, the differential and total cross sections for the dp{yields}sup 3}He{eta} reaction have been measured in a high precision high statistics COSY-ANKE experiment near threshold using a continuous beam energy ramp up to an excess energy Q of 11.3 MeV with essentially 100% acceptance.
Journal ArticleDOI
Close-to-threshold meson production in hadronic interactions
TL;DR: The field of meson production at threshold in the hadron-hadron interaction began in the fifties when sufficient energies of accelerated protons were available as discussed by the authors, and the field is entering a new domain of precision.
Journal ArticleDOI
Measurement of the dp -> He-3 eta reaction near threshold
Jerzy Smyrski,H.-H. Adam,A. Budzanowski,Eryk Czerwiński,Rafał Czyżykiewicz,Damian Tomasz Gil,D. Grzonka,Michał Janusz,Michał Janusz,L. Jarczyk,B. Kamys,A. Khoukaz,Paweł Klaja,Paweł Klaja,T. Mersmann,Paweł Moskal,Paweł Moskal,W. Oelert,Cezary Piskor-Ignatowicz,J. Przerwa,J. Przerwa,B. Rejdych,J. Ritman,T. Rożek,T. Sefzick,Marek Siemaszko,A. Täschner,P. Winter,M. Wolke,P. Wüstner,W. Zipper +30 more
TL;DR: In this paper, total and differential cross sections for the d p → He 3 η reaction have been measured near threshold for He 3 center-of-mass momenta in the range from 17.1 MeV/c to 87.5 MeV /c.
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