Measurement of the Λb0 Lifetime in Λb0→J/ψΛ0 in pp̄ Collisions at s=1.96TeV

A Abulencia; J Adelman; T Affolder; T Akimoto; MG Albrow; D Ambrose; S Amerio; D Amidei; A Anastassov; K Anikeev; A Annovi; J Antos; M Aoki; G Apollinari; JF Arguin; T Arisawa; A Artikov; W Ashmanskas; A Attal; F Azfar; P Azzi-Bacchetta; P Azzurri; N Bacchetta; W Badgett; A Barbaro-Galtieri; VE Barnes; BA Barnett; S Baroiant; V Bartsch; G Bauer; F Bedeschi; S Behari; S Belforte; G Bellettini; J Bellinger; A Belloni; D Benjamin; A Beretvas; J Beringer; T Berry; A Bhatti; M Binkley; D Bisello; RE Blair; C Blocker; B Blumenfeld; A Bocci; A Bodek; V Boisvert; G Bolla; A Bolshov; D Bortoletto; J Boudreau; A Boveia; B Brau; L Brigliadori; C Bromberg; E Brubaker; J Budagov; HS Budd; S Budd; S Budroni; K Burkett; G Busetto; P Bussey; KL Byrum; S Cabrera; M Campanelli; M Campbell; F Canelli; A Canepa; S Carrillo; D Carlsmith; R Carosi; S Carron; M Casarsa; A Castro; P Catastini; D Cauz; M Cavalli-Sforza; A Cerri; L Cerrito; SH Chang; YC Chen; M Chertok; G Chiarelli; G Chlachidze; F Chlebana; I Cho; K Cho; D Chokheli; JP Chou; G Choudalakis; SH Chuang; K Chung; WH Chung; YS Chung; M Ciljak; CI Ciobanu; MA Ciocci

Journal article

Measurement of the Λb0 Lifetime in Λb0→J/ψΛ0 in pp̄ Collisions at s=1.96TeV

A Abulencia, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, JF Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar Show all

Physical Review Letters | AMER PHYSICAL SOC | Published : 2007

DOI: 10.1103/PhysRevLett.98.122001

Abstract

We report a measurement of the Λb0 lifetime in the exclusive decay Λb0→J/ψΛ0 in pp̄ collisions at s=1.96TeV using an integrated luminosity of 1.0fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. Using fully reconstructed decays, we measure τ(Λb0)=1.593-0.078+0.083(stat)±0.033(syst)ps. This is the single most precise measurement of τ(Λb0) and is 3.2σ higher than the current world average. © 2007 The American Physical Society.