Study of b-quark mass effects in multijet topologies with the DELPHI detector at LEP

被引：14

作者：

Abdallah, J. ^{[1
,2
]}

Abreu, P. ^{[27
]}

Adam, W. ^{[59
]}

Adzic, P. ^{[14
]}

Albrecht, T. ^{[22
]}

Alemany-Fernandez, R. ^{[11
]}

Allmendinger, T. ^{[22
]}

Allport, P. P. ^{[28
]}

Amaldi, U. ^{[31
,32
]}

Amapane, N.

Amato, S. ^{[55
]}

Anashkin, E. ^{[39
,40
]}

Andreazza, A.

Andringa, S. ^{[65
,66
]}

Anjos, N. ^{[27
]}

Antilogus, P. ^{[1
,2
]}

Apel, W-D. ^{[22
]}

Arnoud, Y. ^{[18
]}

Ask, S. ^{[11
]}

Asman, B.

Augustin, J. E.

Augustinus, A. ^{[11
]}

Baillon, P. ^{[11
]}

Ballestrero, A. ^{[71
,72
]}

Bambade, P. ^{[25
]}

Barbier, R. ^{[30
]}

Bardin, D. ^{[21
]}

Barker, G. J.

Baroncelli, A. ^{[44
,67
]}

Battaglia, M. ^{[11
]}

Baubillier, M. ^{[1
,2
]}

Becks, K-H. ^{[62
]}

Begalli, M. ^{[63
]}

Behrmann, A. ^{[62
]}

Ben-Haim, E. ^{[25
]}

Benekos, N. ^{[35
]}

Benvenuti, A. ^{[7
,8
]}

Berat, C. ^{[18
]}

Berggren, M. ^{[1
,2
]}

Bertrand, D. ^{[4
]}

Besancon, M. ^{[45
]}

Besson, N. ^{[45
]}

Bloch, D. ^{[12
]}

Blom, M. ^{[34
]}

Bluj, M. ^{[60
,61
]}

Bonesini, M. ^{[31
,32
]}

Boonekamp, M. ^{[45
]}

Booth, P. S. L. ^{[28
]}

Borisov, G. ^{[26
]}

Botner, O. ^{[56
]}

机构：

[1] Univ Paris 06, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[2] Univ Paris 07, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] ULB VUB, IIHE, B-1050 Brussels, Belgium

[5] Univ Athens, Dept Phys, GR-10680 Athens, Greece

[6] Univ Bergen, Dept Phys, N-5007 Bergen, Norway

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

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

[9] Centro Brasileiro Pesquisas Fis, BR-22290 Rio de Janeiro, Brazil

[10] CNRS, IN2P3, Lab Phys Corpusculaire, Coll France, F-75231 Paris 05, France

[11] CERN, CH-121123 Geneva, Switzerland

[12] CNRS ULP, IN2P3, Inst Rech Subatom, F-67037 Strasbourg, France

[13] DESY Zeuthen, D-15735 Zeuthen, Germany

[14] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[15] CAS High Energy Phys Div, Inst Phys, FZU, Prague 18221 8, Czech Republic

[16] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[17] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[18] Univ Grenoble, CNRS, IN2P3, Inst Sci Nucl, F-38026 Grenoble, France

[19] Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[20] Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, Finland

[21] Joint Inst Nucl Res, Moscow 101000, Russia

[22] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[23] Inst Nucl Phys PAN, PL-31142 Krakow, Poland

[24] Univ Min & Met Krakow, Fac Phys & Nucl Techn, PL-30055 Krakow, Poland

[25] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

[26] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England

[27] LIP, IST, FCUL, P-1000 Lisbon, Portugal

[28] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[29] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[30] Univ Claude Bernard Lyon, IPNL, IN2P3, CNRS, F-69622 Villeurbanne, France

[31] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy

[32] Ist Nazl Fis Nucl, I-20126 Milan, Italy

[33] Charles Univ Prague, IPNP MFF, CR-18000 Prague, Czech Republic

[34] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[35] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

[36] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[37] Univ Oviedo, Dpto Fis, Oviedo 33007, Spain

[38] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[39] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[40] Ist Nazl Fis Nucl, I-35131 Padua, Italy

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

[42] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[43] Ist Nazl Fis Nucl, I-00173 Rome, Italy

[44] Univ Roma 3, Dipartimento Fis, I-00146 Rome, Italy

[45] CEA Saclay, Serv Phys Particules, DAPNIA, F-91191 Gif Sur Yvette, France

[46] CSIC UC, Inst Fis Cantabria, Santander 39006, Spain

[47] Inst High Energy Phys, Protvino, Moscow Region, Russia

[48] J Stefan Inst, Ljubljana 1000, Slovenia

[49] Univ Ljubljana, Dept Phys, Ljubljana 1000, Slovenia

[50] Stockholm Univ, S-11385 Stockholm, Sweden

来源：

EUROPEAN PHYSICAL JOURNAL C | 2008年 / 55卷 / 04期

关键词：

D O I：

10.1140/epjc/s10052-008-0631-5

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 effect of the heavy b-quarkmass on the two, three and four-jet rates is studied using LEP data collected by the DELPHI experiment at the Z peak in 1994 and 1995. The rates of b-quark jets and light quark jets (l = uds) in events with n = 2, 3, and 4 jets, together with the ratio of two and four-jet rates of b-quarks with respect to light-quarks, R-n(bl), have been measured with a double-tag technique using the CAMBRIDGE jet-clustering algorithm. A comparison between experimental results and theory (matrix element or Monte Carlo event generators such as PYTHIA, HERWIG andARIADNE) is done after the hadronisation phase. Using the four-jet observabl R-4(bl), a measurement of the b-quark mass using massive leading-order calculations gives: m(b)(M-Z) = 3.76 +/- 0.32 (stat) +/- 0.17 (syst) +/- 0.22 (had) +/- 0.90 (theo) GeV/c(2). This result is compatible with previous three-jet determinations at the M-Z energy scale and with low energy mass measurements evolved to the M-Z scale using QCD renormalisation group equations.

引用

页码：525 / 538

页数：14

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