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Titolo:
Higher partial waves in pp -> pp eta near threshold
Autore:
Calen, H; Dyring, J; Faldt, G; Fransson, K; Gustafsson, L; Haggstrom, S; Hoistad, B; Johanson, J; Johansson, A; Johansson, T; Kullander, S; Mortsell, A; Ruber, R; Zlomanczuk, J; Ekstrom, C; Kilian, K; Oelert, W; Sefzick, T; Bilger, R; Brodowski, W; Clement, H; Wagner, GJ; Bondar, A; Kuzmin, A; Schwartz, B; Sidorov, V; Sukhanov, A; Dunin, V; Morosov, B; Povtorejko, A; Sukhanov, A; Zernov, A; Kupsc, A; Marciniewski, P; Stepaniak, J; Zabierowski, J; Turowiecki, A; Wilhelmi, Z; Wilkin, C;
Indirizzi:
Univ Uppsala, Dept Radiat Sci, S-75121 Uppsala, Sweden Univ Uppsala Uppsala Sweden S-75121 Radiat Sci, S-75121 Uppsala, Sweden Svedberg Lab, S-75121 Uppsala, Sweden Svedberg Lab Uppsala Sweden S-75121 vedberg Lab, S-75121 Uppsala, Sweden KFA Julich GmbH, Forschungszentrum, IKP, D-52425 Julich, Germany KFA Julich GmbH Julich Germany D-52425 rum, IKP, D-52425 Julich, Germany Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 t Phys, D-72076 Tubingen, Germany Novosibirsk Nucl Phys Inst, Novosibirsk 630090, Russia Novosibirsk Nucl Phys Inst Novosibirsk Russia 630090 irsk 630090, Russia Joint Inst Nucl Res, Dubna 101000, Russia Joint Inst Nucl Res Dubna Russia 101000 t Nucl Res, Dubna 101000, Russia Inst Nucl Studies, PL-00681 Warsaw, Poland Inst Nucl Studies Warsaw Poland PL-00681 tudies, PL-00681 Warsaw, Poland Inst Nucl Studies, PL-90137 Lodz, Poland Inst Nucl Studies Lodz Poland PL-90137 cl Studies, PL-90137 Lodz, Poland Warsaw Univ, Inst Expt Phys, PL-0061 Warsaw, Poland Warsaw Univ Warsaw Poland PL-0061 Inst Expt Phys, PL-0061 Warsaw, Poland Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England Univ London Univ Coll London England WC1E 6BT , London WC1E 6BT, England
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 2-3, volume: 458, anno: 1999,
pagine: 190 - 196
SICI:
0370-2693(19990708)458:2-3<190:HPWIP->2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOTAL CROSS-SECTION; NUCLEON NUCLEON COLLISIONS; NEAR-THRESHOLD; PP->PP-ETA REACTION; KINEMATICAL THRESHOLD; P+P->P+P+PI-0; PROTON; MESONS;
Keywords:
eta-mesons; threshold production; angular distribution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Calen, H Univ Uppsala, Dept Radiat Sci, Box 535, S-75121 Uppsala, Sweden Univ Uppsala Box 535 Uppsala Sweden S-75121 5121 Uppsala, Sweden
Citazione:
H. Calen et al., "Higher partial waves in pp -> pp eta near threshold", PHYS LETT B, 458(2-3), 1999, pp. 190-196

Abstract

Exclusive measurements of the production of eta-mesons in the pp-->pp eta reaction have been carried out at excess energies of 16 and 37 MeV above threshold. The deviations from phase space are dominated by the proton-protonfinal state interaction and this influences particularly the energy distribution of the eta-meson. However, evidence is also presented at the higher energy for the existence of an anisotropy in the angular distributions of the eta-meson and also of the final proton-proton pair, probably to be associated with D-waves in this system interfering with the dominant S-wave term. The sign of the eta angular anisotropy suggests that rho-exchange is important for this reaction. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 24/11/20 alle ore 11:01:10