Determination of the b quark mass at the Z mass scale

被引：27

作者：

Abbiendi, G ^{[1
]}

Ainsley, C

Åkesson, PF

Alexander, G

Allison, J

Anagnostou, G

Anderson, KJ

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Bailey, I

Ball, AH

Barberio, E

Barlow, RJ

Batley, RJ

Behnke, T

Bell, KW

Bella, G

Bellerive, A

Bethke, S

Biebel, O

Bloodworth, IJ

Boeriu, O

Bock, P

Böhme, J

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Burckhart, HJ

Cammin, J

Carnegie, RK

Caron, B

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Clarke, PEL

Clay, E

Cohen, I

Couchman, J

Csilling, A

Cuffiani, M

Dado, S

Dallavalle, GM

Dallison, S

De Roeck, A

De Wolf, EA

机构：

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

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

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

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

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

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

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

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

[9] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

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

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

[15] Queen Mary Univ London, 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, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada

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

[22] Rutherford Appleton Lab, CLRC, 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 1130033, Japan

[26] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[27] Kobe Univ, Kobe, Hyogo 6578501, Japan

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

[29] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany

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

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

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

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

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

[35] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[36] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[37] Yale Univ, Dept Phys, New Haven, CT 06520 USA

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

[39] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary

[40] Max Planck Inst, Munich, Germany

[41] Res Inst Particle & Nucl Phys, Budapest, Hungary

[42] Univ Calif Riverside, High Energy Phys Grp, Riverside, CA 92521 USA

[43] CERN, Div EP, CH-1211 Geneva 23, Switzerland

[44] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

EUROPEAN PHYSICAL JOURNAL C | 2001年 / 21卷 / 03期

关键词：

D O I：

10.1007/s100520100746

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 hadronic decays of Z bosons recorded with the OPAL detector at LEP, events containing b quarks were selected using the long lifetime of b flavoured hadrons. Comparing the 3-jet rate in b events with that in d,u,s and c quark events, a significant difference was observed. Using O(alpha (2)(S)) calculations for massive quarks, this difference was used to determine the b quark mass in the YI-S renormalisation scheme at the scale of the Z boson mass. By combining the results from seven different jet finders the running b quark mass was determined to be (m) over bar (b) (m(Z)) = (2.67 +/-0.03(stat.)(-0.37)(+0.29)(syst.)+/-0.19(theo.)) GeV. Evolving this value to the b quark mass scale itself yields (m) over bar (b)((m) over bar (b)) = (3.95(-0.62)(+0.52))GeV, consistent with results obtained at the b quark production threshold. This determination confirms the QCD expectation of a scale dependent quark mass. A constant mass is ruled out by 3.9 standard deviations.

引用

页码：411 / 422

页数：12

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