MEASUREMENT OF XI-C PRODUCTION IN E+E- ANNIHILATION AT 10.5 GEV CENTER-OF-MASS ENERGY

被引：24

作者：

ALBRECHT, H

机构：

[1] DESY

[2] Institut für Physik1 1 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054DO51P., Universität Dortmund

[3] Physikalisches Institut2 2 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054ER12P., Universität Erlangen-Nürnberg

[4] Institut für Hochenergiephysik3 3 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054HD24P., Universität Heidelberg

[5] Max-Planck-Institut für Kernphysik

[6] Institute of Particle Physics7 7 Supported by the Natural Sciences and Engineering Research Council, Canada.

[7] Institut für Experimentelle Kernphysik9 9 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054KA17P., Universität Karlsruhe

[8] Institute of Physics12 12 Supported by the Swedish Research Council., University of Lund

[9] Institute of Theoretical and Experimental Physics

[10] University of South Carolina13 13 Supported by the US, Department of Energy, Columbia, SC 29208

来源：

PHYSICS LETTERS B | 1990年 / 247卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(90)91059-K

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have observed production of the charmed-strange baryon Ξc+ and its neutral isospin partner, the Ξc0. The Ξc+ was reconstructed in the final state Ξ-π+π+, while the Ξc0 was seen in decay to Ξ-π+ and Ξ-π+π+π-. The average Ξc fragmentation spectrum has been determined, as well as the production cross section times branching ratio for each decay mode. The charged and neutral masses were measured to be 2465.1 ± 3.6 ± 1.9 MeV/c2 and 2472.1 ± 2.7 ± 1.6 MeV/c2 respectively, corresponding to a mass-splitting, M(Ξc+) - M(Ξc0), of -7.0±4.5±2.2 MeV/c2. © 1990.

引用

页码：121 / 126

页数：6

共 35 条

[31]

SHIFMAN MA, 1986, 1986 P INT S PROD DE, P199

[32]

SHIFMAN MA, 1987, USP FIZ NAUK, V151, P194

[33] CHARMED BARYON ISODOUBLET MASS SPLITTING IN QUANTUM CHROMODYNAMICS REVITALIZED [J].

SINHA, SN ;

SINHA, SM ;

RAHMAN, M ;

KIM, DY .

PHYSICS LETTERS B, 1989, 218 (03) :333-336

[34] ELECTROMAGNETIC-MASS DIFFERENCES OF CHARMED BARYONS [J].

WRIGHT, ACD .

PHYSICAL REVIEW D, 1978, 17 (11) :3130-3132

[35] REVIEW OF PARTICLE PROPERTIES [J].

YOST, GP ;

BARNETT, RM ;

HINCHLIFFE, I ;

LYNCH, GR ;

RITTENBERG, A ;

ROSS, RR ;

SUZUKI, M ;

TRIPPE, TG ;

WOHL, CG ;

PORTER, FC ;

MONTANET, L ;

AGUILARBENITEZ, M ;

HERNANDEZ, JJ ;

CONFORTO, G ;

CRAWFORD, RL ;

SCHUBERT, KR ;

ROOS, M ;

TORNQVIST, NA ;

HOHLER, G ;

HAGIWARA, K ;

KAWABATA, S ;

MANLEY, DM ;

OLIVE, KA ;

HAYES, KG ;

SCHINDLER, RH ;

CABRERA, B ;

SHROCK, RE ;

EICHLER, RA ;

ROPER, LD ;

TROWER, WP .

PHYSICS LETTERS B, 1988, 204 :1-+

← 1 2 3 4 →