Measurement of the B0d-(B)over-bar0d oscillation frequency

被引：22

作者：

Acciarri, M

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

Bizzarri, R

Blaising, JJ

Blyth, SC

Bobbink, GJ

Bock, R

Bohm, A

Boldizsar, L

Borgia, B

机构：

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

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

[3] NIKHEF H, Natl Inst High Energy Phys, 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, IN2P3, CNRS, 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, Sez 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, Hungary

[19] MIT, Cambridge, MA 02139 USA

[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 23, Switzerland

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

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

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

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

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

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

[29] Univ Lecce, I-73100 Lecce, Italy

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

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

[32] CIEMAT, E-28040 Madrid, Spain

[33] Inst Theoret & Expt Phys, Moscow 117259, Russia

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

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

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

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

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

[39] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[40] CALTECH, Pasadena, CA 91125 USA

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

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

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

[44] Princeton Univ, Princeton, NJ 08544 USA

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

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

[47] Russian Acad Sci, Inst Nucl Phys, St Petersburg, Russia

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

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

[50] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 5卷 / 02期

关键词：

D O I：

10.1007/s100520050262

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：

Time-dependent B-0-(B) over bar(0) mixing is studied using about two million hadronic Z decays registered by L3 in 1994 and 1995. For this study three techniques are used. Tagging of the b-quark charge at decay time is performed by identifying leptons from semileptonic B decays. The flavour of the b quark at production time is determined from the charge of the lepton in the opposite hemisphere or by using a jet-charge technique. The proper time of the B-particle decay is obtained by reconstructing the production and decay vertices or by a measurement of the lepton impact parameter. The combined result for the frequency of B-d(0) meson oscillations is Delta m(d) = 0.444 +/- 0.040 ps(-1).

引用

页码：195 / 203

页数：9

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