Measurement of the Λb0 lifetime using semileptonic decays

被引：24

作者：

Abazov, V. M. ^{[1
]}

Abbott, B.

Abolins, M.

Acharya, B. S.

Adams, M.

Adams, T.

Aguilo, E.

Ahn, S. H.

Ahsan, M.

Alexeev, G. D.

Alkhazov, G.

Alton, A.

Alverson, G.

Alves, G. A.

Anastasoaie, M.

Ancu, L. S.

Andeen, T.

Anderson, S.

Andrieu, B.

Anzelc, M. S.

Arnoud, Y.

Arov, M.

Arthaud, M.

Askew, A.

Asman, B.

Jesus, A. C. S. Assis

Atramentov, O.

Autermann, C.

Avila, C.

Ay, C.

Badaud, F.

Baden, A.

Bagby, L.

Baldin, B.

Bandurin, D. V.

Banerjee, S.

Banerjee, P.

Barberis, E.

Barfuss, A. -F.

Bargassa, P.

Baringer, P.

Barreto, J.

Bartlett, J. F.

Bassler, U.

Bauer, D.

Beale, S.

Bean, A.

Begalli, M.

Begel, M.

Belanger-Champagne, C.

机构：

[1] Joint Inst Nucl Res, Dubna, Russia

[2] Univ Buenos Aires, Buenos Aires, DF, Argentina

[3] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil

[4] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[5] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

[6] Univ Alberta, Edmonton, AB, Canada

[7] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[8] York Univ, Toronto, ON M3J 2R7, Canada

[9] McGill Univ, Montreal, PQ, Canada

[10] Univ Sci & Technol China, Hefei 230026, Peoples R China

[11] Univ Los Andes, Bogota, Colombia

[12] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic

[13] Czech Tech Univ, CR-16635 Prague, Czech Republic

[14] Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech Republic

[15] Univ San Francisco Quito, Quito, Ecuador

[16] Univ Blaise Pascal, IN2P3 CNRS, Lab Phys Subatom & Cosmol, Clermont Ferrand, France

[17] Univ Mediterranee, IN2P3 CNRS, CPPM, Marseille, France

[18] Univ Paris 11, Orsay, France

[19] Lab Accelerateur Lineaire, IN2P3 CNRS, F-91405 Orsay, France

[20] Univ Paris 06, IN2P3 CNRS, LPNHE, Paris, France

[21] Univ Paris 07, Paris, France

[22] CEA Saclay, DAPNIA Serv Phys Particules, Saclay, France

[23] Unit Haute Alsace, CNRS, IN2P3, Strasbourg, France

[24] Univ Strasbourg, IPHC, Strasbourg, France

[25] Univ Lyon, Lyon, France

[26] Univ Lyon 1, IPNL, CNRS IN2P3, Villeurbanne, France

[27] Rhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, Germany

[28] Univ Bonn, Inst Phys, D-5300 Bonn, Germany

[29] Univ Freiburg, Inst Phys, Freiburg, Germany

[30] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany

[31] Univ Munich, Munich, Germany

[32] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[33] Panjab Univ, Chandigarh 160014, India

[34] Univ Delhi, Delhi 110007, India

[35] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[36] Univ Coll Dublin, Dublin 2, Ireland

[37] Korea Univ, Korea Detector Lab, Seoul 136701, South Korea

[38] Sungkyunkwan Univ, Suwon, South Korea

[39] CINVESTAV, Mexico City 14000, DF, Mexico

[40] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands

[41] FOM, Inst NIKHEF, NL-1098 SJ Amsterdam, Netherlands

[42] Radboud Univ Nijmegen NIKHEF, Nijmegen, Netherlands

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

[44] Moscow MV Lomonosov State Univ, Moscow, Russia

[45] Inst High Energy Phys, Protvino, Russia

[46] Petersburg Nucl Phys Inst, St Petersburg, Russia

[47] Stockholm Univ, S-10691 Stockholm, Sweden

[48] Royal Inst Technol, Stockholm, Sweden

[49] Lund Univ, Lund, Sweden

[50] Uppsala Univ, Uppsala, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 18期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.182001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a measurement of the Lambda(0)(b) lifetime using a sample corresponding to 1.3 fb(-1) of data collected by the D0 experiment in 2002-2006 during run II of the Fermilab Tevatron collider. The Lambda(0)(b) baryon is reconstructed via the decay Lambda(0)(b)->mu(nu) over bar Lambda X-+(c). Using 4437 +/- 329 signal candidates, we measure the Lambda(0)(b) lifetime to be tau(Lambda(0)(b))=1.290(-0.110)(+0.119)(stat)(-0.091)(+0.087)(syst) ps, which is among the most precise measurements in semileptonic Lambda(0)(b) decays. This result is in good agreement with the world average value.

引用

页数：7

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