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
收藏
页码：553 / 569
页数：17
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