Measurement of the branching fraction Br (B⁰_s → D_s*D_s* using the D0 detector at Fermilab

Thesis/Dissertation · Thu May 01 00:00:00 EDT 2008

DOI:https://doi.org/10.2172/953710· OSTI ID:953710

Walder, James William ^[1]

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1. Lancaster Univ. (United Kingdom)

This thesis describes a measurement of the branching fraction Br (B⁰_s → D_s*D_s*) made using a data sample collected from proton-antiproton collisions at a centre-of-mass energy of 1.96 TeV, corresponding to approximately 1.3 fb^-1 of integrated luminosity collected in 2002--2006 by the D0 detector at the Fermilab Tevatron Collider. One D*_s meson was partially reconstructed in the decay D_s → Φμv, and the other D*_s meson was identified using the decay D_s → Φπ where no attempt was made to distinguish D_s and D*_s states. The resulting measurement is Br (B⁰_s → D_s*D_s*) = 0.039^+0.019_-0.017(stat) ^+0.016_-0.015(syst). This was subsequently used to estimate the width difference ΔΓ^CP_s in the B⁰_s-$$\bar{B}$$⁰_s system: ΔΓ^CP_s/Γ_s = 0.079^+0.038_-0.035(stat)^+0.031_-0.030(syst), and is currently one of the most precise estimates of this quantity and consistent with the Standard Model.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 953710
• Report Number(s): FERMILAB-THESIS-2009-15; TRN: US1001344
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLLISIONS
DATA
DECAY
ENERGY
FERMILAB
FERMILAB TEVATRON
LUMINOSITY
MESONS
PROTON-ANTIPROTON INTERACTIONS
STANDARD MODEL
Experiment-HEP