Low and Intermediate Energy Kaon-Nucleon Physics: Proceedings of the Workshop held at the Institute of Physics of the University of Rome, March 24–28, 1980

422 Pages·1981·9.256 MB·English

by  R. Koch (auth.), E. Ferrari, G. Violini (eds.)

LOW AND INTERMEDIATE ENERGY KAON -NUCLEON PHYSICS
LOW AND INTERMEDIATE ENERGY
KAON-NUCLEON PHYSICS
Proceedings of the Workshop held at the
Institute of Physics of the University of Rome,
March 24-28,1980
Edited by
E. FERRARI and G. VIOLINI
Istituto di Fisica "G. Marconi"
Universita degli Studi di Ramo
D. REIDEL PUBLISHING COMPANY
DORDRECHT: HOLLAND / BOSTON: U.S.A.
LONDON: ENGLAND
Ubrary of Congress Cataloging in Publication Data
Workshop on Low and Intermediate Energy Kaon-nucleon Physics,
Rome, 1980.
Low and intermediate energy kaon-nucleon physics.
Includes indexes.
1. Particles (Nuclear physics)-Congresses. 2. Kaons
Congresses. I. Ferrari, Ezio. II. Violini, G. III. Title.
QC793.W67 1980 539.7'2162 80-39982
ISBN-I3: 978-94-009-8383-0 e-ISBN-I3: 978-94-009-8381-6
001: 10.1007/978-94-009-8381-6
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TABLE OF CONTENTS
PREFACE ix
LIST OF PARTICIPANTS xi
THE PRESENT STATUS OF PION-NUCLEON PHASE SHIFT ANALYSIS
R. Koch
PION-NUCLEON DATA, DISPERSION RELATIONS, AND RESONANCES
R. E. Cutkosky 31
IS THE POLE APPROXIMATION TO THE UNPHYSICAL PART OF T~~ LEFT
HAND CUT SUFFICIENT?
P. Kroll 41
A REVIEW OF RECENT KN AND KN PHASE SHIFT ANALYSES
G. C. Oades 53
THE LOW ENERGY FIXED-t KN AND KN AMPLITUDES
G. C. Oades 73
THE KAON-NUCLEON INTERACTION NEAR THRESHOLD
A. D. Martin 97
KN DISPERSION THEORY
N. M. Queen 1 15
THE DETEill~INATION OF g~LK FROM KO REGENERATION DATA
G.K. Atkin, B. Di Claudio, N.M. Queen and G. Violini 131
vi TABLE OF CONTENTS
THE ZEROLOGY OF KAON-NUCLEON FORWARD SCATTERING AMPLITUDES
O. Dumbraj s 139
THE USE OF ZEROS IN STUDYING KN PHYSICS
G. Atkin 145
KAON-NUCLEUS INTERACTIONS
C. B. Dover 165
KAON-NUCLEUS SCATTERING, REGENERATION AND ANALYTICITY
O. Dumbrajs 187
MEASURElVIENT OF THE POLARIZATION PARAMETERS FOR K+ n -+ K+ n AND KOp
AT THE MOMENTUM OF 1.06,1.28, 1.39 AND 1.49 GeV/c
F. Takasaki 191
POLARIZATION IN K p ELASTIC SCATTERING BETWEEN 0.995 GeV/c AND
1.212 GeV/c
H.C. Bryant, A.A.Carter, M. Coupland, E. Eisenhandler,
W.R. Gibson, P.I.P. Kalmus, H. Sandhu, S.J. Watts, A.
Astbury, J.K. Davies, G.H. Grayer, A.W. Robertson, T.P.
Shah, C. Sutton 207
POLARIZATION IN K+n ELASTIC AND CHARGE EXCHANGE SCATTERING
BETWEEN 0.851 GeV/c AND 1.351 GeV/c
S.J.Watts, D.V. Bugg, A.A. Carter, M. Coupland, E.
Eisenhandler, W.R. Gibson, P.I.P. Kalmus, H. Sandhu,
A. Astbury, G.H. Grayer, A.W. Robertson, T.P. Shah,
C. Sutton 215
EXOTIC ATOMS AND THE KAo!~-NUCLEON INTERACTION
C. J. Batty 223
'l'HE f\ ° AND ~o PRODUCTION RATIOS FOR ~ P AND K P INTERACTIONS
AT REST
M. Goossens, G. Wilquet, J.1. Armstrong and J.H. Bartley 243
TABLE OF CONTENTS vii
SLOW AND STOPPING K P INTERACTIONS IN A BUBBLE CHAMBER
D. J. Miller, R.J. Nowak and T. Tymieniecka 251
A(1405), A CDD POLE, AND THE KN INTERACTION AT LOW ENERGIES
K. S. Kumar 259
SEARCH FOR STRANGE DIBARYON SYSTEMS
G. Auriemma, G. D'Agostini, G. Marini, G. Martellotti,
F. Massa, A. Nigro, A. Rambaldi, A. Sciubba, J.P. De
Brion, A. Caillet, J.B. Cheze, J. Derre, G. Marel, E.
Pauli, C. Pigot, G. Vrana, J. Marraffino, C. Roos, J.
Waters, 'W. Webster, E. Williams, A. Bezaguet, S.
Reucroft, K . Schultze, R. Llosa 267
STUDY OF REACTION INVOLVING FRAGMENT BLi AND BB PRODUCTION
BY K- MESON CAPTURE IN EMULSIONS
M. K. Juric 277
MEASUREMENT OF THE REACTIONS K+ n ->-K+ 1 T -P AND 1T + n -->- 1T + 1T -pAT
6 AND 12 GeV/c ON A TRANSVERSELY POLARIZED DEUTERON TARGET
A. de Lesquen, M. Babou, J. Bystricky, G. Cozzika,
T. Dobrowolski, Y. Ducros, M. Fujisaki, A. Gaidot,C.F.Hwang,
A. Itano, F.Khantine-I,anglois, F,Leh&r, L,van Rossum,M.Svec. 289
+ + - + + -
AMPLITUDE ANALYSIS IN 1T n -->-1T IT P AND K n -->- K IT P REACTIONS
AT 6 GeV/c
M. Svec, J. Bystricky, M. Fujisaki, A. Itano, A. de
Lesquen and L. van Rossum 305
DETERMINATION OF g1TA~ AND g1T~~ COUPLINGS FROM ADLER CONDITIONS
R. Prasad and C. P. Singh 321
CHIRAL SYMMETRY BREAKING : KAON-NUCLEON SYSTEM
A.M. Rodriguez-Vargas 331
viii TABLE OF CONTENTS
MESIC ATOMS AND THE SIGMA-TERMS
P. M. Gensini 339
NEW TECHNIQUES OF ANALYTIC CONTINUATION AND RIGOROUS CORRELATIONS
BETWEEN LOW AND HIGH ENERGY SCATTERING
I. Caprini 363
POSITIVITY AS A SOURCE OF ASYMPTOTIC BOUNDS IN ELECTRON
POSITRON ANNIHILATION
C. Verzegnassi 375
REMARKS BEARING ON THE INTERPRETATION OF THE A( 11105)
RESONANCE
R. H. Dalitz and J. G. McGinley 381
THE ANTISYMMETRIC SPIN-ORBIT INTERACTION BE~mEN QUARKS
F. E. Close and R. H. Dalitz 411
KAON PHYSICS. SOME COMMENTS ON ~TS STATUS AND PERSPECTIVES
G. Violini 419
INDEX OF NAMES 425
INDEX OF SUBJECTS 427
PRF:FACE
The papers collected here were presented in Rome, last March, at
the Workshop on low ancl intermediate energy kaon-nucleon physics.
According to our original plans, Lhe workshop was mostly intended
to review the status of a number of theoretical aspects of the field,
like the application of analyticity to kaon-nucleon and kaon-nucleus
scattering and phase-shift analyses. Moreover we thought that it was
important to review also a number of related topics, like the current
experimental work in the field and its perspectives, the physics of
exotic atoms and TIN phase shift analyses.
The worksh0p was announced at the end of November 1979, and despite
the very short notice, it met a considerable favour which led to a consi
derable expansion of the original program. In particular there was a
special interest among experimental groups which considered it as very
appropriate to present their latest results.
Thus the present collection of paper's consti tues a rather complete
and updated view of the current activity and problems in the field; to
this completeness a substantial contribution comes from the record of
the discussion, whose merit is due to our scientific secretaries Drs.
G. K. Atkin and B. Di Claudio.
An indication of the favour met by the workshop is provided by the
proposal made by several participants after its conclusion, that a
similar one may take place in 1982.
The workshop would not have ~een possible without the support of a
number of institutions. We want to express our gratitude for their gene
rous financial support to
- The University of Rome, its Rector Professor A. Ruberti and the Dean
of the Faculty of Sciences, Professor G. Tecce.
- The Istituto Nazionale di Fisica Nucleare, its President Professor A.
Zichichi and the Director of its Sezione di Roma, Professor L. Paoll'zi.
- The International Centre for Theoretical Physics and its Directo~
Professor A. Salam.
The workshop took place at the Institute of Physics of the Universi
ty of Rome and it is a pleasure to thank for the hospitality its Director
Professor S. Cunsolo, as well as Professor G. Careri who made available
his office to host the Secretariat of the Workshop.
Also on behalf of all the participants who certainly appreciated this
type of effective collaboration, we want to thank the secretaries of the
workshop, Mrs. E. Di Silvesto and G. Fascetti.
Finally a special thanks goes to Miss A. Centamore for her tremendous
work of typing all the contributions and to Dr. G. K. Atkin for his
collaboration in the preparation of the final text.
E. Ferrari
Rome, August 31, 1980
G. Violini
ix
E. Ferrari and G. Violini (eds.), Low and Intermediate Energy Kaon-Nucleon Physics, ix.
Copyright © 1981 by D. Reidel Publishing Company.
LIST OF PARTICIPANTS
J. ANTOLIN - University of Zaragoza (Spain)
G. AURIEMMA - University of Rome (Italy)
G. ATKIN - University of Rome (Italy)
G. BARONI - University of Rome (Italy)
C.J. BATTY - Rutherford Laboratory, Chilton, Didcot (U.K.)
J.E. BOWCOCK - University of Birmingham (U.K.)
H. BUCKA - University of Berlin (Germany)
A. CONTI - University of Florence (Italy)
R.E. CUTKOSKY - University of pittsburg (U.S.A.)
R.H. DALITZ - University of Oxford (U.K.)
A. de LESQUEN - CEN-Saclay (France)
J. DERRE' - CERN (Switzerland)
B. DE TOLLIS - University of Rome (Italy)
B. DI CLAUDIO - University of Rome (Italy)
R. DOMINGUEZ - University of Barquisimeto (Venezuela)
C.B. DOVER - Brookhaven National Laboratory (U.S.A.)
O. DUMBRAJS - University Karlsruhe (Germany)
E. FERRARI - University of Rome (Italy)
M. GASPERO - University of Rome (Italy)
P. GENSINI - University of Lecce (Italy)
M. HASINOFF - University of British Columbia (Canada)
M. JURIC - Bniversity of Beograd (Yugoslavia)
R. KOCH - University of Karlsruhe (Germany)
P. KROLL - University of Wuppertal (Germany)
K.S. KUMAR - Mc Master University, Hamilton (Canada)
M. LUSIGNOLI - University of Rome (Italy)
G. MARINI - University of Rome (Italy)
G. MARTELLOTTI - University of Rome (Italy)
A.D. MARTIN - University of Durham (U.K.)
F. MASSA - University of Rome (Italy)
B. MINETTI - University of Torino (Italy)
D.J. MILLER - University College London (U.K.)
M. MUSETTE - University of Brussel (Belgium)
A. NIGRO - University of Rome (Italy)
R. NOWAK - University of Warsaw (Poland)
G.C. OADES - Aarhus University (Denmark)
N.M. QUEEN - University of Birmingham (U.K.)
M. RESTIGNOLI - University of Rome (Italy)
A.M. RODRIGUEZ-VARGAS - Universidad de los Andes, Bogota (Colombia)
A. SCIUBBA - University of Rome (Italy)
C.P. SINGH - University of Varanasi (India)
M. STASZEL - University of Warsaw (Poland)
M. SVEC - McGill University, Montreal (Canada)
F. TAKASAKI - Nat. Lab. High Energy Physics (KEK), Ibaraki-ken (Japan)
T. TYMIENIECKA - University of Warsaw (Poland)
L. van ROSSUM - CEN-Saclay (France)
C. VERZEGNASSI - University of Trieste (Italy)
G. VIOLINI - University of Rome (Italy)
S.J. WATTS - Queen Mary College, London (U.K.)
N. ZOVKO - Ruder Boskovic Institute, Zagreb (Yugoslavia).
xi
X
THE PRESENT STATUS OF PION-NUCLEON PHASE SHIFT ANALYSIS
R. Koch
Institut fur Theoretische Kernphysik - Universitiit Karlsruhe
1. Introduction
Since the CERN (1) and the Saclay (2) phase shift analyses (1967-
73), which discovered the most important nucleon resonances up to 2 GeV
mass, progress has been made in the methods for determining rrN amplitudes
and partial waves. Especially the problem of ambiguous solutions is un
derstood (3, 14) and can be solved nowadays by using analyticity con
straints together with isospin invariance (4). Also the experimental
information on rr±p ~ n±p and n-p ~ rron differential cross sections and
polarizations and on the n±p total cross sections has considerably in
creased since 1973. At present two pilase shift solutions are available
which, apart from data, are also based on the information derived from
the analytic properties of scattering amplitudes. 'rhe CMU-LBL group (5)
worked in the lab. momentum range . L,-2 GeV / c and is extending the in
vestigations up to 3 GeV/c. The collaboration between the Karlsruhe
group and E. Pietarinen from Helsinki (KH) resulted in a set of partial
waves (6, 7) which runs from threshold to 10 GeV/c. Also fixed-t amplitudes
in terms of an expansion developed by Pietarinen (8) are available in a
t-range -lGev2 ~ t ~ o. A new amplitude analysis (9) in the t-range
It I s .5 GeV2 and up to 200 GeV/c is in progress at Karlsruhe.
Three other analyses must be mentioned. They make less use of model
independent analyticity input but rely more on model representations of
partial waves or amplitudes. A. Hendry's phase shift analysis (10) in
the range 1.6-10 GeV/c is based on an impact parameter representation.
Zidell, Arndt and Roper (11) have performed a low energy analysis inthe
elastic domain and use an empirical parametr~zation with the right thre
shold behaviour for every phase shift. D. Chew (12) has analysed n + p data
between .6 and 2.3 GeV/c with an ansatz including zeroes of transversity
amplitudes and an empirical phase parametrization.
In section 3 the methods and some remarkable results of the above
mentioned authors will be described and compared. Section 4 contains nev
results (13) of the Karlsruhe group obtained in the range 2-10 GeV/c. In
section 5 these results will be partly discussed in the impacL parameter
E. Ferrari and C. Violini reds.), Lolt' alld Intermediate Energy KaOIl-Nuc1l!ol1 Physics, /-29.
Copyright c 198/ hr D. Rt'idel PlIhlishil1J.: Company.