Determination of the production rate of D*o mesons and of the ratio V/(V+P) in Zo → c(c)over-bar decays

被引：26

作者：

Ackerstaff, K ^{[1
]}

Alexander, G

Allison, J

Altekamp, N

Anderson, KJ

Anderson, S

Arcelli, S

Asai, S

Ashby, SF

Axen, D

Azuelos, G

Ball, AH

Barberio, E

Barlow, RJ

Bartoldus, R

Batley, JR

Baumann, S

Bechtluft, J

Behnke, T

Bell, KW

Bella, G

Bentvelsen, S

Bethke, S

Betts, S

Biebel, O

Biguzzi, A

Bird, SD

Blobel, V

Bloodworth, IJ

Bobinski, M

Bock, P

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Burckhart, HJ

Burgard, C

Burgin, R

Capiluppi, P

Carnegie, RK

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Chrisman, D

Clarke, PEL

Cohen, I

Conboy, JE

Cooke, OC

机构：

[1] CERN, European Org Particle Phys, CH-1211 Geneva 23, Switzerland

[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[3] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

[4] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[5] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[6] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[7] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[8] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[9] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada

[10] Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada

[11] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[12] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[13] Albert Ludwigs Univ, Fak Phys, D-79104 Freiburg, Germany

[14] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

[15] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[16] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[17] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[18] UCL, London WC1E 6BT, England

[19] Univ Manchester, Dept Phys, Schuster Lab, Manchester M13 9PL, Lancs, England

[20] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[21] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada

[22] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

[23] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[24] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[25] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel

[26] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 113, Japan

[27] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[28] Kobe Univ, Kobe, Hyogo 657, Japan

[29] Brunel Univ, Inst Phys & Environm Sci, Uxbridge UB8 3PH, Middx, England

[30] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel

[31] Univ Hamburg, DESY, Inst Phys Expt, D-22607 Hamburg, Germany

[32] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada

[33] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada

[34] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[35] Duke Univ, Dept Phys, Durham, NC 27708 USA

[36] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[37] Inst Nucl Res, H-4001 Debrecen, Hungary

[38] Ludwigs Maximillian Univ, Sekt Phys, D-85748 Garching, Germany

[39] TRIUMF, Vancouver, BC V6T 2A3, Canada

[40] Inst Nucl Res, H-4001 Debrecen, Hungary

[41] Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary

[42] New York Univ, Dept Phys, New York, NY 10003 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 5卷 / 01期

关键词：

D O I：

10.1007/s100520050244

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In e(+)e(-) collisions at centre-of-mass energies around 91 GeV. D(*0) mesons have been reconstructed using data collected with the OPAL detector at LEP. The hadronisation fraction has been measured to be f(c --> D(*0)) = 0.218 +/- 0.054 +/- 0.045 +/- 0.007, where the errors correspond to the statistical and systematic errors specific to this analysis, and to systematic uncertainties from externally measured blanching fractions, respectively. Together with previous OPAL measurements of the hadronisation fractions of other charmed mesons, this value is used to investigate the relative production of observed vector and pseudoscalar chart-lied mesons in Z(0) --> c (c) over bar decays. The production ratio is determined to be P(V)(eff) = V/(V+P) = 0.57 +/- 0.05. The relative primary production of vector and pseudoscalar masons, P(V)(prim) is studied in the context of the production and decay of orbitally excited charmed resonances. The first measurement of the inclusive D(s)(*+) production rate in hadronic Z(0) decays is presented.

引用

页码：1 / 17

页数：17

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