Measurement of B0d-(B0d)over-bar oscillations

被引：22

作者：

Abreu, P

Adam, W

Adye, T

Adzic, P

Ajinenko, I

Alekseev, GD

Alemany, R

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Andersson, P

Andreazza, A

Antilogus, P

Apel, WD

Arnoud, Y

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbi, M

Bardin, DY

Barker, G

Baroncelli, A

Barring, O

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bizouard, MA

Bloch, D

Blume, M

Bonesini, M

机构：

[1] Inst Super Tecn, LIP, FCUL, P-1000 Lisbon, Portugal

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[3] Univ Instelling Antwerp, Dept Phys, B-2610 Wilrijk, Belgium

[4] Free Univ Brussels, IIHE, B-1050 Brussels, Belgium

[5] Univ Etat Mons, Fac Sci, B-7000 Mons, Belgium

[6] Univ Athens, Phys Lab, GR-10680 Athens, Greece

[7] Univ Bergen, Dept Phys, N-5007 Bergen, Norway

[8] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

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

[10] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[11] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[12] Univ Estadual Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

[13] Comenius Univ, Fac Math & Phys, Bratislava 84215, Slovakia

[14] Coll France, Phys Corpusculaire Lab, IN2P3, CNRS, F-75231 Paris 05, France

[15] CERN, CH-1211 Geneva 23, Switzerland

[16] Inst Rech Subatom, IN2P3, CNRS ULP, F-67037 Strasbourg, France

[17] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[18] Acad Sci Czech Republ, Inst Phys, FZU, Div High Energy Phys, CZ-18040 Prague 8, Czech Republic

[19] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[20] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[21] Univ Grenoble 1, IN2P3, CNRS, Inst Nucl Sci, F-38026 Grenoble, France

[22] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[23] Joint Inst Nucl Res, Moscow 101000, Russia

[24] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[25] Inst Nucl Phys, PL-30055 Krakow, Poland

[26] Stanislaw Staszic Univ Min & Met, PL-30055 Krakow, Poland

[27] Ctr Univ Paris Sud, Accelerateur Lineaire Lab, IN2P3, CNRS, F-91405 Orsay, France

[28] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England

[29] Inst Super Tecn, FCUL, LIP, P-1000 Lisbon, Portugal

[30] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[31] Univ Paris 06, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[32] Univ Paris 07, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[33] Univ Lund, Dept Phys, S-22363 Lund, Sweden

[34] Univ Lyon 1, IPNL, IN2P3, CNRS, F-69622 Villeurbanne, France

[35] Univ Aix Marseille 2, CPP, IN2P3, CNRS, F-13288 Marseille 09, France

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

[37] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[38] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[39] Charles Univ, Nucl Ctr, MFF, Areal MFF, CR-18000 Prague 8, Czech Republic

[40] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[41] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

[42] Univ Oslo, Dept Phys, N-1000 Oslo 3, Norway

[43] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

[44] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[45] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[46] Ist Nazl Fis Nucl, I-35131 Padua, Italy

[47] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[48] Univ Rome 2, Dipartimento Fis, I-00173 Rome, Italy

[49] Ist Nazl Fis Nucl, I-00173 Rome, Italy

[50] CE Saclay, CEA, DAPNIA, Serv Phys Particules, F-91191 Gif Sur Yvette, France

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1997年 / 76卷 / 04期

关键词：

D O I：

10.1007/s002880050582

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：

B-d(0) meson oscillations are measured in hadronic Z(0) decays using the charge of a lepton or the mean charge of an event hemisphere to sign the presence of a b or a (b) over bar quark when it is produced, and using the charge of a lepton emitted at large p(t) or of a D*(+/-) to sign the presence of a B or a (B) over bar meson when it decays. With 3.2 million hadronic Z(0) decays registered by DELPHI between 1991 and 1994, the mass difference Delta m(d) between the two physical B-d(0) states is measured in four channels: Delta m(d) = 0.523 +/- 0.072 +/- 0.043 ps(-1) (D*(+/-) - Q(hem)) Delta m(d) = 0.493 +/- 0.042 +/- 0.027 ps(-1) (l - Q(hem)) Delta m(d) = 0.499 +/- 0.053 +/- 0.015 ps(-1) ((pi* - l) - Q(hem) Delta m(d) = 0.480 +/- 0.040 +/- 0.051 ps(-1) (l - l). Taking into account the statistical overlap between these measurements and the common systematic uncertainties, the combined result is: Delta m(d) = 0.497 +/- 0.035 ps(-1).

引用

页码：579 / 598

页数：20

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