Measurement of the B(sup degree ovr sub s) meson lifetime using semileptonic decays.

Journal Article · Fri Jan 01 04:00:00 EST 1999 · Phys. Rev. D

OSTI ID:942864

Abe, F; Akimoto, H; Akopian, A; Albrow, M G; Amadon, A; Blair, R E; Byrum, K L; Kovacs, E; Kuhlmann, S E; LeCompte, T; Nodulman, L; Proudfoot, J; Thurman-Keup, R; Wagner, R G; Wicklund, A B; KEK,; FNAL,

The lifetime of the B{sub X}{sup 0} meason is measured using the semileptonic decay B{sub S}{sup 0} {yields} D{sub S}{sup -/+}vX. The data sample consists of about 110 pb{sup -1} of p{ovr p} collisions at sqrt[s]=1.8 TeV collected by the CDF detector at Fermilab. Four different D{sub S}{sup -} decay modes are reconstructed resulting in approximately 600 D{sub S}{sup -/+} signal events. The B{sub S}{sup 0} meson lifetime is determined to be {tau}(B{sub S}{sup 0})=1.36 {+-} 0.09{sub -0.05}{sup +0.06} ps, where the first and second uncertainties are statistical and systematic, respectively. The B{sub S}{sup 0} meson decay length distribution is examined for a lifetime difference {Delta}{Gamma}/{Gamma} between the two mass eigenstates of the B{sub S}{sup 0} meson. An upper limit of {Delta}{Gamma}/{Gamma} < 0.83 is set at the 95% confidence level.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942864
• Report Number(s): ANL-HEP-PR-00-23
• Journal Information: Phys. Rev. D, Journal Name: Phys. Rev. D Journal Issue: 032004 ; 1999 Vol. 59; ISSN 1550-7998
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
DECAY
EIGENSTATES
FERMILAB
FERMILAB COLLIDER DETECTOR
MASS
MESONS
PROTON-PROTON INTERACTIONS
SEMILEPTONIC DECAY