Measurement of the W-pair cross section in e+e- collisions at 172 GeV

被引：18

作者：

Barate, R ^{[1
]}

Buskulic, D

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Nief, JY

Pietrzyk, B

Casado, MP

Chmeissani, M

Comas, P

Crespo, JM

Delfino, M

Fernandez, E

Fernandez-Bosman, M

Garrido, L

Juste, A

Martinez, M

Merino, G

Miquel, R

Mir, LM

Padilla, C

Park, IC

Pascual, A

Perlas, JA

Riu, I

Sanchez, F

Teubert, F

Colaleo, A

Creanza, D

de Palma, M

Gelao, G

Iaselli, G

Maggi, G

Maggi, M

Marinelli, N

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, G

Huang, X

Lin, J

Ouyang, Q

机构：

[1] CNRS, IN2P3, LAPP, F-74019 Annecy Le Vieux, France

[2] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[3] Ist Nazl Fis Nucl, Dipartimento Fis, I-70126 Bari, Italy

[4] Acad Sinica, Inst High Energy Phys, Beijing, Peoples R China

[5] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[6] Univ Blaise Pascal, IN2P3, CNRS, Phys Corpusculaire Lab, F-63177 Aubiere, France

[7] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[8] NRCD, Athens, Greece

[9] Ecole Polytech, Phys Theor & Hautes Energies Lab, IN2P3, CNRS, F-91128 Palaiseau, France

[10] Univ Florence, Dipartimento Fis, Ist Nazl Fis Nucl, I-50125 Florence, Italy

[11] Florida State Univ, Supercomp Computat Res Inst, Tallahassee, FL 32306 USA

[12] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

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

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

[15] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BZ, England

[16] Univ Innsbruck, Inst Phys Expt, A-6020 Innsbruck, Austria

[17] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[18] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[19] Fac Sci Luminy, Ctr Phys Particules, IN2P3, CNRS, F-13288 Marseille, France

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

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

[22] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

[23] Univ Paris Sud, Accelerateur Lineaire Lab, IN2P3, CNRS, F-91405 Orsay, France

[24] Univ Pisa, Dipartimento Fis, Ist Nazl Fis Nucl, I-56010 Pisa, Italy

[25] Scuola Normale Super Pisa, I-56010 Pisa, Italy

[26] Univ London Royal Holloway & Bedford New Coll, Dept Phys, Surrey TW20 0EX, England

[27] Rutherford Appleton Lab, Dept Particle Phys, Didcot OX11 0QX, Oxon, England

[28] CENS, CEA, DAPNIA, Serv Phys Particles, F-91191 Gif Sur Yvette, France

[29] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[30] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England

[31] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany

[32] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[33] Ist Nazl Fis Nucl, I-34127 Trieste, Italy

[34] Univ Washington, Seattle, WA 98195 USA

[35] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[36] Univ Turin, Ist Fis Gen, Turin, Italy

[37] CNR, Ist Cosmogeofis, I-10133 Turin, Italy

[38] Kangnung Natl Univ, Kangnung, South Korea

来源：

PHYSICS LETTERS B | 1997年 / 415卷 / 04期

关键词：

D O I：

10.1016/S0370-2693(97)01266-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The e(+)e(-) --> W+W- cross section is measured in a data sample collected by ALEPH at a mean centre-of-mass energy of 172.09 GeV, corresponding to an integrated luminosity of 10.65 pb(-1). Cross sections are given for the three topologies, fully leptonic, semi-leptonic and hadronic of a W-pair decay. Under the assumption that no other decay modes are present, the W-pair cross section is measured to be 11.7 +/- 1.2(stat.) +/- 0.3(syst.) pb. The existence of the triple gauge boson vertex of the Standard Model is clearly preferred by the data. The decay branching ratio of the W boson into hadrons is measured to be B(W --> hadrons) = 67.7 +/- 3.1(stat.) +/- 0.7(syst.) %, allowing a determination of the CKM matrix element \V-cs\ = 0.98 +/- 0.14(stat.) +/- 0.03(syst.). (C) 1997 Elsevier Science B.V.

引用

页码：435 / 444

页数：10

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