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Title: Measurement of the B0s lifetime in B0s → K+ K- decays

Abstract

A method is presented to simultaneously separate the contributions to a sample of B0s → h+h'- decays, where h = π or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb -1 of data collected at CDF the B0 lifetime is measured as τB0 = 1.558-0.047+0.050stat ± 0.028syst ps, in agreement with the world average measurement. The B0s lifetime in the Bs0 → K+K- decay is measured as τB0s → K+K- = 1.51-0.11+0.13stat ± 0.04 syst ps. No difference is observed between the lifetime and other measurements of the average B0s lifetime or the lifetime of the light B0s mass eigenstate determined from B0s → J/ΨΦ decays. With the assumptions that B0s → K+K- is 100% CP-even and that τB0s = τsub B0 the width difference in the B0s system is determined as ΔΓCP/Γ = 0.03-0.15+0.17stat ± 0.05syst using the current world average B0 lifetime. This is consistent with zero and with the current world average measurement.

Authors:
 [1]
  1. Wolfson College, Oxford (United Kingdom)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
948597
Report Number(s):
FERMILAB-THESIS-2009-03
TRN: US0901686
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; DECAY; EIGENSTATES; FERMILAB COLLIDER DETECTOR; LIFETIME; Experiment-HEP

Citation Formats

Pounder, Nicola Louise. Measurement of the B0s lifetime in B0s → K+ K- decays. United States: N. p., 2009. Web. doi:10.2172/948597.
Pounder, Nicola Louise. Measurement of the B0s lifetime in B0s → K+ K- decays. United States. https://doi.org/10.2172/948597
Pounder, Nicola Louise. 2009. "Measurement of the B0s lifetime in B0s → K+ K- decays". United States. https://doi.org/10.2172/948597. https://www.osti.gov/servlets/purl/948597.
@article{osti_948597,
title = {Measurement of the B0s lifetime in B0s → K+ K- decays},
author = {Pounder, Nicola Louise},
abstractNote = {A method is presented to simultaneously separate the contributions to a sample of B0s → h+h'- decays, where h = π or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb -1 of data collected at CDF the B0 lifetime is measured as τB0 = 1.558-0.047+0.050stat ± 0.028syst ps, in agreement with the world average measurement. The B0s lifetime in the Bs0 → K+K- decay is measured as τB0s → K+K- = 1.51-0.11+0.13stat ± 0.04 syst ps. No difference is observed between the lifetime and other measurements of the average B0s lifetime or the lifetime of the light B0s mass eigenstate determined from B0s → J/ΨΦ decays. With the assumptions that B0s → K+K- is 100% CP-even and that τB0s = τsub B0 the width difference in the B0s system is determined as ΔΓCP/Γ = 0.03-0.15+0.17stat ± 0.05syst using the current world average B0 lifetime. This is consistent with zero and with the current world average measurement.},
doi = {10.2172/948597},
url = {https://www.osti.gov/biblio/948597}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}

Thesis/Dissertation:
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