Measurement of the inclusive charmless semileptonic branching fraction of beauty hadrons and a determination of |Vub| at LEP

被引：47

作者：

Acciarri, M ^{[1
]}

Adriani, O

Aguilar-Benitez, M

Ahlen, S

Alcaraz, J

Alemanni, G

Allaby, J

Aloisio, A

Alviggi, MG

Ambrosi, G

Anderhub, H

Andreev, VP

Angelescu, T

Anselmo, F

Arefiev, A

Azemoon, T

Aziz, T

Bagnaia, P

Baksay, L

Ball, RC

Banerjee, S

Banicz, K

Barczyk, A

Barillere, R

Barone, L

Bartalini, P

Baschirotto, A

Basile, M

Battiston, R

Bay, A

Becattini, F

Becker, U

Behner, F

Berdugo, J

Berges, P

Bertucci, B

Betev, BL

Bhattacharya, S

Biasini, M

Biland, A

Bilei, GM

Blaising, JJ

Blyth, SC

Bobbink, GJ

Bock, R

Bohm, A

Boldizsar, L

Borgia, B

Bourilkov, D

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[3] Natl Inst High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands

[4] Univ Amsterdam, NL-1009 DB Amsterdam, Netherlands

[5] Univ Michigan, Ann Arbor, MI 48109 USA

[6] Lab Annecy Le Vieux Phys Particules, LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France

[7] Johns Hopkins Univ, Baltimore, MD 21218 USA

[8] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

[9] Inst High Energy Phys, Beijing 100039, Peoples R China

[10] Humboldt Univ, D-10099 Berlin, Germany

[11] Univ Bologna, I-40126 Bologna, Italy

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

[13] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[14] Boston Univ, Boston, MA 02215 USA

[15] Northeastern Univ, Boston, MA 02115 USA

[16] Inst Atom Phys, R-76900 Bucharest, Romania

[17] Univ Bucharest, R-76900 Bucharest, Romania

[18] Hungarian Acad Sci, Cent Res Inst Phys, H-1525 Budapest 114, Hungary

[19] MIT, Cambridge, MA 02139 USA

[20] Ist Nazl Fis Nucl, Sezione Firenze, I-50125 Florence, Italy

[21] Univ Florence, I-50125 Florence, Italy

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

[23] World Lab, FBLJA Project, CH-1211 Geneva 23, Switzerland

[24] Univ Geneva, CH-1211 Geneva 4, Switzerland

[25] Chinese Univ Sci & Technol, Hefei 230029, Peoples R China

[26] SEFT, Res Inst High Energy Phys, SF-00014 Helsinki, Finland

[27] Univ Lausanne, CH-1015 Lausanne, Switzerland

[28] Ist Nazl Fis Nucl, Sezione Lecce, I-73100 Lecce, Italy

[29] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[30] Univ Lyon 1, CNRS, Inst Phys Nucl Lyon, IN2P3, F-69622 Villeurbanne, France

[31] CIEMAT, E-28040 Madrid, Spain

[32] Ist Nazl Fis Nucl, Sezione Milano, I-20133 Milan, Italy

[33] Inst Theoret & Expt Phys, Moscow, Russia

[34] Ist Nazl Fis Nucl, Sezione Napoli, I-80125 Naples, Italy

[35] Univ Naples Federico II, I-80125 Naples, Italy

[36] Univ Cyprus, Dept Nat Sci, Nicosia, Cyprus

[37] Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands

[38] Natl Inst Nucl Phys & High Energy Phys, NL-6525 ED Nijmegen, Netherlands

[39] CALTECH, Pasadena, CA 91125 USA

[40] Ist Nazl Fis Nucl, Sezione Perugia, I-06100 Perugia, Italy

[41] Univ Perugia, I-06100 Perugia, Italy

[42] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[43] Princeton Univ, Princeton, NJ 08544 USA

[44] Ist Nazl Fis Nucl, Sezione Roma, I-00185 Rome, Italy

[45] Univ Roma La Sapienza, I-00185 Rome, Italy

[46] Inst Phys Nucl, St Petersburg, Russia

[47] Univ Salerno, I-84100 Salerno, Italy

[48] Ist Nazl Fis Nucl, I-84100 Salerno, Italy

[49] Univ Calif San Diego, San Diego, CA 92093 USA

[50] Univ Santiago, Dept Fis Particulas Elementales, E-15706 Santiago, Spain

来源：

PHYSICS LETTERS B | 1998年 / 436卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00941-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A measurement of the inclusive charmless semileptonic branching fraction of beauty hadrons, b --> X-u l nu, has been performed using almost two million hadronic Z decays collected by the L3 experiment at LEP, yielding the result: Br(b --> X-u l nu) = (3.3 +/- 1.0 +/- 1.7) x 10(-3). The first uncertainty is statistical and the second is systematic. The modulus of the Cabibbo-Kobayashi-Maskawa matrix element V-ub extracted from this measurement is: \V-ub\ = (6.0(-1.0-1.9)(+0.8+1.4) +/- 0.2) x 10(-3), where the uncertainties are statistical, systematic and theoretical, respectively. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：174 / 186

页数：13

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