Measurement of the Bs0 lifetime and study of Bs0-(Bs0)over-bar oscillations using Dsl events

被引：40

作者：

Abreu, P

Adam, W

Adye, T

Adzic, P

Albrecht, Z

Alderweireld, T

Alekseev, GD

Alemany, R

Allmendinger, T

Allport, PP

Almehed, S

Amaldi, U

Amapane, N

Amato, S

Anassontzis, EG

Andersson, P

Andreazza, A

Andringa, S

Antilogus, P

Apel, WD

Arnoud, Y

Åsman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbiellini, G

Barbier, R

Bardin, DY

Barker, G

Baroncelli, A

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Behrmann, A

Beilliere, P

Belokopytov, Y

Belous, K

Benekos, NC

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bigi, M

Bilenky, MS

Bizouard, MA

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 Antwerp, Belgium

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

[5] Univ 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, Dipartmento 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 Estado 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] ULP, CNRS, IN2P3, Inst Rech Subatom, F-67037 Strasbourg, France

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

[18] Acad Sci Czech Republ, Inst Phys, Div High Energy Phys, FZU, 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, Inst Sci Nucl, IN2P3, CNRS, F-38026 St Martin Dheres, France

[22] Helsinki Inst Phys, Helsinki 00014, 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] Univ Min & Met Krakow, PL-30055 Krakow, Poland

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

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

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

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

[31] Univ Paris 07, F-75252 Paris 05, France

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

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

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

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

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

[37] Univ Milan, Dipartimento Fis, I-20126 Milan, Italy

[38] INFN Milano, I-20126 Milan, Italy

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

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

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

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

[43] Univ Oslo, Dept Phys, N-1000 Oslo, Norway

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

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

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

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

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

[49] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 2000年 / 16卷 / 04期

关键词：

D O I：

10.1007/s100520000415

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：

Lifetime and oscillations of B-s(0) mesons have been studied in events with a large transverse momentum lepton and a D-s of opposite electric charge in the same hemisphere, selected from about 3.6 million hadronic Z(0) decays accumulated by DELPHI between 1992 and 1995. The B-s(0) lifetime and the fractional width difference between the two physical B-s(0) states have been found to be: tau(Bs0) = (1.42(-0.13)(+0.14)(stat.) +/- 0.03(syst)) ps Delta Gamma(Bs0) /Gamma(Bs0) < 0.46 at the 95% C.L. In the latter result it has been assumed that tau(Bs0) = tau(Bd0). Using the same sample, a limit on the mass difference between the physical B-s(0) states has been set: Delta m(Bs0) > 7.4 ps(-1) at the 95% C.L. with a corresponding sensitivity equal to 8.1 ps(-1).

引用

页码：555 / 578

页数：24

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