HIGH-RESOLUTION STUDY OF HYPERON-NUCLEON INTERACTIONS BY ASSOCIATED STRANGENESS PRODUCTION IN PP COLLISIONS

被引：63

作者：

SIEBERT, R

DIDELEZ, JP

FRASCARIA, R

REPOSEUR, T

WARDE, E

LIPPERT, C

ERNST, J

HINTERBERGER, F

MAYERKUCKUK, T

BOIVIN, M

YONNET, J

SAGHAI, B

GROSSIORD, JY

BOVET, E

EGGER, JP

BLANPIED, G

PREEDOM, BM

PERDRISAT, CF

机构：

[1] UNIV BONN,INST STRAHLEN & KERNPHYS,W-5300 BONN 1,GERMANY

[2] LAB NATL SATURNE,F-91191 GIF SUR YVETTE,FRANCE

[3] CEA SACLAY,DAPNIA,SPHN,F-91191 GIF SUR YVETTE,FRANCE

[4] UNIV LYON 1,INST PHYS NUCL,F-69622 VILLEURBANNE,FRANCE

[5] UNIV NEUCHATEL,INST PHYS,CH-2000 NEUCHATEL,SWITZERLAND

[6] UNIV S CAROLINA,COLUMBIA,SC 29208

[7] COLL WILLIAM & MARY,WILLIAMSBURG,VA 23185

来源：

NUCLEAR PHYSICS A | 1994年 / 567卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0375-9474(94)90329-8

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The associated strangeness production in pp collisions was studied at bombarding energies of 2.3 and 2.7 GeV by detecting the outgoing K+ particles with a high resolution magnetic spectrometer at forward angles up to 23.5-degrees laboratory angle. The kaons were separated from an immense background of protons and pions by a highly resolving TOF electronics in addition to vetoes from Cerenkov detectors utilizing either beta differing Cerenkov light cones in lucite or different thresholds for light production in aerogel. The hyperon-nucleon missing mass spectra obtained show strong deviations from pure phase space which is ascribed to final state interations of the pLAMBDA and the NSIGMA systems. The structures found are discussed and compared with results from K-d --> pi-YN experiments, with theoretical calculations in the frame of OBE models, and with the prediction of sharp strange dibaryon resonances from several quark-bag models.

引用

页码：819 / 843

页数：25