Measurement of the energy dependence of hadronic jet rates and the strong coupling αs from the four-jet rate with the DELPHI detector at LEP

被引：0

作者：

Abdallah, J

Abreu, P

Adam, W

Adzic, P

Albrecht, T

Alderweireld, T

Alemany-Fernandez, R

Allmendinger, T

Allport, P

Amaldi, U

Amapane, N

Amato, S

Anashkin, E

Andreazza, A

Andringa, S

Anjos, N

Antilogus, P

Apel, WD

Arnoud, Y

Ask, S

Asman, B

Augustin, E

Augustinus, A

Baillon, P

Ballestrero, A

Bambade, P

Barbier, R

Bardin, D

Barker, G

Baroncelli, A

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Behrmann, A

Ben-Haim, E

Benekos, N

Benvenuti, A

Berat, C

Berggren, M

Berntzon, L

Bertrand, D

Besancon, M

Besson, N

Bloch, D

Blom, M

Bluj, M

Bonesini, M

Boonekamp, M

Booth, L

机构：

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

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

[3] Univ Instelling Antwerp, Dept Phys, B-2610 Antwerp, Belgium

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

[5] Univ Etat Mons, Fac Sci, B-7000 Mons, Belgium

[6] Univ Athens, Phys Lab, GR-10680 Athens, Greece

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

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

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

[10] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[11] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[12] Univ Estado Rio De Janeiro, Inst Fis, Rio De Janeiro, Brazil

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

[14] CERN, CH-1211 Geneva 23, Switzerland

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

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

[17] FZU, CAS, Inst Phys, Div High Energy Phys, Prague 18040 8, Czech Republic

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

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

[20] Univ Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, F-38026 St Martin Dheres, France

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

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

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

[24] Inst Nucl Phys, PL-30055 Krakow, Poland

[25] Stanislaw Staszic Univ Min & Met, Fac Phys & Nucl Tech, PL-30055 Krakow, Poland

[26] Univ Paris 11, Lab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, France

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

[28] Inst Super Tecn, LIP, FCUL, P-1000 Lisbon, Portugal

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

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

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

[32] Lund Univ, Dept Phys, S-22363 Lund, Sweden

[33] Univ Lyon 1, IPNL, CNRS, IN2P3, F-69622 Villeurbanne, France

[34] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[35] Ist Nazl Fis Nucl, I-20133 Milan, Italy

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

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

[38] Charles Univ Prague, MFF, IPNP, Areal MFF, CR-18000 Prague 8, Czech Republic

[39] NIKHEF, NL-1009 DB Amsterdam, Netherlands

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

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

[42] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

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

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

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

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

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

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

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

[50] Ist Nazl Fis Nucl, I-00146 Rome, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2005年 / 38卷 / 04期

关键词：

D O I：

10.1140/epjc/s2004-02060-7

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：

Hadronic events from the data collected with the DELPHI detector at LEP within the energy range from 89 GeV to 209 GeV are selected, their jet rates are determined and compared to predictions of four different event generators. One of them is the recently developed APACIC++ generator which performs a massive matrix element calculation matched to a parton shower followed by string fragmentation. The four-jet rate is used to measure alpha(s) in the next-to-leading-order approximation yielding alpha(s)(M-Z(2)) = 0.1175 +/- 0.0030. The running of alpha(s) determined by using four-jet events has been tested. The logarithmic energy slope is measured to be dalpha(s)(-1)/d log E-cm = 1.14 +/- 0.36. Since the analysis is based on four-jet final states it represents an alternative approach to previous DELPHI alpha(s) measurements using event shape distributions.

引用

页码：413 / 426

页数：14

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