Search for Bs0 oscillations using inclusive lepton events

被引：28

作者：

Barate, R ^{[1
]}

Buskulic, D

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Merle, E

Minard, MN

Nief, JY

Pietrzyk, B

Alemany, R

Boix, G

Casado, MP

Chmeissani, M

Crespo, JM

Delfino, M

Fernandez, E

Fernandez-Bosman, M

Garrido, L

Graugès, E

Juste, A

Martinez, M

Merino, G

Miquel, R

Mir, LM

Park, IC

Pascual, A

Colaleo, A

Creanza, D

de Palma, M

Gelao, G

Iaselli, G

Maggi, G

Maggi, M

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, G

Huang, X

Lin, J

Ouyang, Q

Wang, T

Xie, Y

Xu, R

机构：

[1] IN2P3, CNRS, Phys Particules Lab, 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, Sez Bari, 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 Clermont Ferrand, IN2P3, CNRS, Phys Corpusculaire Lab, F-63177 Clermont Ferrand, France

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

[8] Democritos Nucl Res Ctr, GR-15310 Athens, Greece

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[23] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[24] Univ Paris 11, IN2P3, CNRS, Lab Accelerateur Lineaire, F-91898 Orsay, France

[25] Ist Nazl Fis Nucl, Sez Pisa, I-56010 Pisa, Italy

[26] Univ Pisa, Dipartimento Fis, I-56010 Pisa, Italy

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

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

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

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

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

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

[33] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

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

[35] Univ Washington, Seattle, WA 98195 USA

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

[37] Ist Nazl Fis Nucl, Dipartimento Fis, Sez Catania, I-95129 Catania, Italy

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

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

[40] Kangnung Natl Univ, Kangnung, South Korea

[41] Univ Barcelona, Barcelona 08208, Spain

[42] Univ Sassari, Ist Matemat & Fis, I-07100 Sassari, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 7卷 / 04期

关键词：

D O I：

10.1007/s100520050429

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：

A search for B-s(0) oscillations is performed using a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991-95. Compared to previous inclusive lepton analyses, the proper time resolution and b-flavour mistag rate are significantly improved. Additional sensitivity to B-s(0) mixing is obtained by identifying subsamples of events having a B-s(0) purity which is higher than the average for the whole data sample. Unbinned maximum likelihood amplitude fits are performed to derive a lower limit of Delta m(s) > 9.5 ps(-1) at the 95% confidence limit (95% CL). Combining with the ALEPH D-s(-)-based analyses yields Delta m(s) > 9.6 ps(-1) at 95% CL.

引用

页码：553 / 569

页数：17

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