Measurement of the cross section for open-beauty production in photon-photon collisions at LEP

被引：13

作者：

Achard, P ^{[1
]}

Adriani, O

Aguilar-Benitez, M

Alcaraz, J

Alemanni, G

Allaby, J

Aloisio, A

Alviggi, MG

Anderhub, H

Andreev, VP

Anselmo, F

Arefiev, A

Azemoon, T

Aziz, T

Bagnaia, P

Bajo, A

Baksay, G

Baksay, L

Baldew, S

Banerjee, S

Barczyk, A

Barillère, R

Bartalini, P

Basile, M

Batalova, N

Battiston, R

Bay, A

Becattini, F

Becker, U

Behner, F

Bellucci, L

Berbeco, R

Berdugo, J

Berges, P

Bertucci, B

Betev, BL

Biasini, M

Biglietti, M

Biland, A

Blaising, JJ

Blyth, SC

Bobbink, GJ

Böhm, A

Boldizsar, L

Borgia, B

Bottai, S

Bourilkov, D

Bourquin, M

Braccini, S

机构：

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

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

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

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

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

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

[7] Louisiana State Univ, Baton Rouge, LA 70803 USA

[8] IHEP, Beijing 100039, Peoples R China

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

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

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

[12] Northeastern Univ, Boston, MA 02115 USA

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

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

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

[16] MIT, Cambridge, MA 02139 USA

[17] Panjab Univ, Chandigarh 160014, India

[18] Univ Debrecen, ATOMKI, H-4010 Debrecen, Hungary

[19] Univ Coll Dublin, Dept Expt Phys, Dublin 4, Ireland

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

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

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

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

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

[25] Univ Hamburg, D-22761 Hamburg, Germany

[26] Univ Sci & Technol China, Hefei 230029, Anhui, Peoples R China

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

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

[29] CIEMAT, E-28040 Madrid, Spain

[30] Florida Inst Technol, Melbourne, FL 32901 USA

[31] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[32] ITEP, Moscow, Russia

[33] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy

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

[35] Univ Cyprus, Dept Phys, Nicosia, Cyprus

[36] Radboud Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands

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

[38] CALTECH, Pasadena, CA 91125 USA

[39] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

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

[41] Inst Nucl Phys, St Petersburg, Russia

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

[43] Ist Nazl Fis Nucl, Sez Napoli, I-85100 Potenza, Italy

[44] Univ Potenza, I-85100 Potenza, Italy

[45] Princeton Univ, Princeton, NJ 08544 USA

[46] Univ Calif Riverside, Riverside, CA 92521 USA

[47] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

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

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

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

来源：

PHYSICS LETTERS B | 2005年 / 619卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2005.05.072

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The cross section for open-beauty production in photon-photon collisions is measured using the whole high-energy and high-luminosity data sample collected by the L3 detector at LEP. This corresponds to 627 pb(-1) of integrated luminosity for electron-positron centre-of-mass energies from 189 to 209 GeV Events containing b quarks are identified through their semi-leptonic decay into electrons or muons. The e(+)e(-) -> e(+)e(-)bbX cross section is measured within our fiducial volume and then extrapolated to the full phase space. These results are found to be in significant excess with respect to Monte Carlo predictions and next-to-leading order QCD calculations. (c) 2005 Published by Elsevier B.V.

引用

页码：71 / 81

页数：11

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