Measurement of f(c→D*+,X), f(b→D*+,X) and Γc(c)over-bar/Γhad using D*± mesons

被引:82
作者
Ackerstaff, K [1 ]
Alexander, G
Allison, J
Altekamp, N
Anderson, KJ
Anderson, S
Arcelli, S
Asai, S
Axen, D
Azuelos, G
Ball, AH
Barberio, E
Barillari, T
Barlow, RJ
Bartoldus, R
Batley, JR
Baumann, S
Bechtluft, J
Beeston, C
Behnke, T
Bell, AN
Bell, KW
Bella, G
Bentvelsen, S
Bethke, S
Biebel, O
Biguzzi, A
Bird, SD
Blobel, V
Bloodworth, IJ
Bloomer, JE
Bobinski, M
Bock, P
Bonacorsi, D
Boutemeur, M
Bouwens, BT
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
机构
[1] CERN, European Org Particle Phys, CH-1211 Geneva 23, Switzerland
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[3] Carleton Univ, Ottawa Carleton Inst Phys, Dept Phys, Ottawa, ON K1S 5B6, Canada
[4] Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada
[5] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[6] Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England
[7] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy
[8] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[9] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
[10] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[11] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[12] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany
[13] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany
[14] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[15] Univ London Queen Mary & Westfield Coll, London E1 4NS, England
[16] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[17] UCL, London WC1E 6BT, England
[18] Univ Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, England
[19] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[20] Univ Montreal, Nucl Phys Lab, Quebec City, PQ H3C 3J7, Canada
[21] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
[22] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[23] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[24] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel
[25] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 113, Japan
[26] Univ Tokyo, Dept Phys, Tokyo 113, Japan
[27] Kobe Univ, Kobe, Hyogo 657, Japan
[28] Brunel Univ, Uxbridge UB8 3PH, Middx, England
[29] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel
[30] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany
[31] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada
[32] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada
[33] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada
[34] Duke Univ, Dept Phys, Durham, NC 27708 USA
[35] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary
[36] Inst Nucl Res, H-4001 Debrecen, Hungary
[37] Univ Munich, Sekt Phys, D-85748 Garching, Germany
[38] TRIUMF, Vancouver, BC V6T 2A3, Canada
[39] Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary
[40] NYU, Dept Phys, New York, NY 10003 USA
来源
EUROPEAN PHYSICAL JOURNAL C | 1998年 / 1卷 / 3-4期
关键词
D O I
10.1007/s100520050095
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
The production rates of D*(+/-) mesons in charm and bottom events at centre-of-mass energies of about 91 GeV and the partial width of primary c (c) over bar pairs in hadronic Z(0) decays have been measured at LEP using almost 4.4 million hadronic Z(0) decays collected with the OPAL detector between 1990 and 1995, Using a combination of several charm quark tagging methods based on fully and partially reconstructed D*(+/-) mesons, and a bottom tag based on identified muons and electrons, the hadronisation fractions of charm and bottom quarks into D*(+/-) mesons have been found to be f(b --> D*(+)X) = 0.173 +/- 0.016 +/- 0.012 and f(c --> D*(+)X) = 0.222 +/- 0.014 +/- 0.014. The fraction of c (c) over bar events in hadronic Z(0) decays, Gamma(c (c) over bar)/Gamma(had) = Gamma(Z(0) --> c (c) over bar)/Gamma(Z(0) --> hadrons), is determined to be Gamma(c (c) over bar)/Gamma(had) = 0.180 +/- 0.011 +/- 0.012 +/- 0.006. In all cases the first error is statistical, and the second one systematic. The last error quoted for Gamma(c (c) over bar)/Gamma(had) is due to external branching ratios.
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收藏
页码:439 / 459
页数:21
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