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Editor-in-Chief: H.Mitter, Graz Associate Editor: W.Plessas, Graz
Supplementum 1
Theoretical and Experimental
Investigations of
Hadronic Few-Body Systems
Proceedings ofthe European Workshop
on Few-Body Physics, Rome, October 7-11,1986
Edited by
C. Ciofi degli Atti, O. Benhar, E. Pace, and G. Salme
Springer-Verlag Wien NewYork
Prof. Dr. Claudio Ciofi degliAtti
Dr. OmarBenhar
Dr. Emanuele Pace
Dr. Giovanni Salme
Istituto Nazionale di FisicaNucleare
Sezione Sanita
Roma, Italy
This workissubjectto copyright.
All rights are reserved, whether the whole orpart ofthe material isconcerned,
specifically thoseoftranslation, reprinting, re-use ofillustrations,broadcasting,
reproduction by photocopying machine or similar means, and storage in data banks.
© 1986 by Springer-VerlagjWien
Softcoverreprintof the hardcover 1st edition 1986
Special Regulationsfor the U.S.A.: Photocopiesmay bemade forpersonal or
internal use beyond that permitted by Section 107or 108ofthe U.S. Copyright
Law,provided afee is paid. This fee is $0.20per pageoraminimum of$ 1.00if
an articleconsistsofless thanfive pages. Pleasepay this fee to the Copyright
Clearance Center, Inc., 21 Congress Street, Salem, MA01970, U.S.A.,statingthe
ISSN0177-8811,volume, and first andlast pagenumbersofeach article copied.
Thecopyright owner'sconsent doesnot extend to copyingfor general distribution,
for promotion, for creatingnew works, orfor resale. Specific written permission
must be obtained from the publisher for suchcopying.
ISSN0177-8811
ISBN-13:978-3-7091-8899-6 e-ISBN-13:978-3-7091-8897-2
DOl: 10.1007/978-3-7091-8897-2
Local Organizing Committee
C. Ciofi degli Atti
(Workshop Chainnan)
O. Benhar
E. Pace
G. Salme
InternationalAdvisory Committee
V. Belyaev B. L. Bennan
Dubna Washington
C. de Vries M. M. Giannini
NIKHEF Genova
B. F. Gibson F. Gross
Los Alamos CEBAF
J. Morgenstern G. Pisent
Saclay Padova
W. Plessas D. Prosperi
Graz Roma
S. Rosati W. Sandhas
Pisa Bonn
T. Sasakawa P. U. Sauer
Sendai Hannover
C. Schaerf E. Schmid
Roma Tiibingen
Yu. A. Simonov H. Tanaka
Moscow Sapporo
W. T. H. van Oers
TRIUMF
Sponsored
by
Istituto Nazionale di FisicaNucleare (INFN)
Organized
by
INFN-Sezione Sanita
withsupportofPhysics Laboratory, Istituto Superiore di Sanita
Site
Istituto Superiore di Sanita
Roma-Viale Regina Elena, 299
Editorial
By the beginning of 1986 the formerjournal "Acta PhysicaAustriaca"
was transformed to its new format "Few-Body Systems". One of the
principal motives was to provide an active forum for research on few-body
problems in the various domains of physics and neighbouring fields. Few
body systems, understood as consisting of a small number ofconstituent
structures, play an important role in such areas like particle, nuclear,
atomic, molecular, and condensed-matter physics as well as statistical and
mathematical physics, astrophysics, chemical and biological physics. The
new journal should above all serve the purpose ofbringing together at one
place relevant work hitherto dispersed in the literature, thereby fostering
research done on related problems in different areas ofnatural science.
Since its first appearance "Few-Body Systems" has obtained welcom
ing approval and it has been obvious from the very beginning that it is
meeting the actual needs offew-body systems research. The publication of
the original papers in the first few issues already received considerable
attention; also the journal's regular News Section containing information,
both of scientific and practical nature, about latest developments in the
field of few-body physics has been much appreciated. Thus the journal
"Few-Body Systems" is on thebestwaytowardsprovidingalivelyplatform
for the communication offew-body systems research.
It is in the same spirit that we are now initiating the publication of
relevant conferences in connection with the new journal. We hope that
with the help of "Few-Body Systems Supplementa" we will be able to
contribute to a fruitful exchange of the most recent results as typically
presented at conferences on the subject of few-body physics and at cor
responding topical meetings. This will constitute the appropriate adden
dum to the publication of original research work in the form of usual
articles, letter-type notes, rapid communications etc. in the regular issues
ofthejournal "Few-Body Systems".
The Rome Workshop, to the proceedings of which the first Supple
mentum is devoted, provided agood starting point for this new series. The
meeting was excelling for its well-balanced program, its high scientific
standard, and an informative and stimulating atmosphere, what is also
VIII
reflected in the contributions collected in the present volume. These are,
of course, just the features we will have to observe as essential require
ments also for future publications in the series of "Few-Body Systems
Supplementa".
Graz,Jiilich H. Mitter
December 1986 w. Plessas
Preface
This volume collects the papers given at the European Workshop
"Theoretical and Experimental Investigations of Hadronic Few-Body
Systems" which, adhering to an invitation of the European Few-Body
Physics Research Committee, was organized in Rome on October 7-11,
1986. All papers presented at the workshop appear in the volume, plus
two papers which could not be presented orally because their authors
were at the last moment unable to attend. The list of contents closely
follows the programme ofthe workshop.
The workshop, attended by 128 American, European, and Japanese
physicists from 60 different institutions and universities, was sponsored
by the Italian National Institute for Nuclear Physics (lNFN) and was
organized by the INFN Section located at the Istituto Superiore di Sanita
(ISS), which kindly provided the venue for the meeting and many related
facilities. The goal of the workshop was to summarize the present situa
tion and the future perspectives concerning the theoretical descriptions of
strongly interacting few-body systems and their experimentalinvestigation
by electromagnetic and hadronic probes, mainly at intermediate energies.
To this end, representatives from most internationalgroupsworkingwithin
different theoretical methods and with different experimental facilities,
were invited and asked to illustrate their latest results and future research
programs; the intention was to provide, by thisway,animpartialandbroad
information which could be useful to whom is actively working in few
body physics, as well as to young students entering this field ofresearch.
The workshop, entirely based upon plenary sessions and invited papers,
started with a self-contained introductory session, aimed at apresentation
of the main features and open problems in theoretical methods and com
putational techniques, and went over to the discussion of more specific
subjects. Special emphasis was devoted to such topics as realistic descrip
tions ofnucleon-deuteron scattering, polarization experiments, three-body
forces, quark and relativistic effects, nucleon and nuclear form factors at
high momentum transfer, momentum distributions, spectral functions,
final-state interactions, exclusive and inclusive electrodisintegration,y-scal
ing. Particular attention was also paid to a wide presentation ofthe most
x
relevant projects of new particle accelerators, whose construction is ex
pected to have a strong impact on research activity in few-body physics. A
short session was also devoted to the highlights of the Sendai XI Interna
tional IUPAP Conference on "Few-Body Systems in Particle and Nuclear
Physics" (August, 1986) and the Washington Symposium on "The Three
Body Force intheThree-NucleonSystem"(April, 1986);theaimofthisses
sion was to inform that part ofthe audience (youngstudentsandmanyEu
ropean physicists) which was unable to attend these two important events.
The workshop was opened by Professor Nicola Cabibbo, President of
INFN, and the closing remarks were given by Professor Franz Gross; to
both ofthem I would like to express my sincere appreciation.
The participation of the leading international experts together with
many young students, the large amount of information that circulated
during the workshop, the presentation of many yet unpublished experi
mental and theoretical results and, finally, the highly qualified and live
discussions, make me confident that the workshop has fully reached its
goal.
Much of the success ofthe workshop was due to the considerable help
of our sponsor and the extensive efforts of many people. I would like to
express my hearthfelt thanks to Professor Francesco Pocchiari, Director
of ISS, for his kind hospitality and support; to the members ofthe Inter
national Advisory Committee, for their advice on the programme; to all
session chairmen and discussion leaders, for their expertise and skillness;
to Mrs. Bruna Ceccarelli, who acted as administrative secretary of the
workshop; to the staff of the Physics Laboratory of ISS, particularly to
Mr. A. Grisanti and Mr. G. Monteleone, for their continuous assistance in
smoothing out many logistical difficulties; to the Service for Cultural
Activities and to the Editorial Section of ISS, for their constant support;
to Mrs. Paola De Castro-Pietrangeli, Ms. Alessandra Raponi, Mrs. Paola
Tacchi-Venturi and Ms. Giovanna Vacri, for running the secretarial work
during the workshop.
Finally, it is my pleasant duty to record the extraordinary energy,
efforts and skillness of my co-organizers and collaborators Omar Benhar,
Emanuele Pace and Giovanni Salme without whom the workshop would
not have been possible;to them I am deeply indebted.
Roma, December 1986 Claudio Ciofi degli Atti
