skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of the Ratios of Branching Fractions B(B$$0\atop{s}$$→D$$-\atop{s}$$π +π +π -)/ B(B 0→D -π +) and B(B$$0\atop{s}$$ → D$$-\atop{s}$$π +)/ B(B 0 → D -π +)

Abstract

We present the measurement of the ratios of branching fractions B(B$$0\atop{s}$$ → D$$-\atop{s}$$π +) to B(B 0 → D -π +), and B(B$$0\atop{s}$$→D$$-\atop{s}$$π +π +π -) to B(B 0→D -π +). We analyze data taken with the CDF II detector that corresponds to an integrated luminosity of 355 pb -1 in p$$\bar{p}$$ collisions at √s= 1.96 TeV at the Fermilab Tevatron.

Authors:
 [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1352020
Report Number(s):
FERMILAB-THESIS-2007-101
1515456
DOE Contract Number:
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Bolshov, Arkadiy. Measurement of the Ratios of Branching Fractions B(B$0\atop{s}$→D$-\atop{s}$π+π+π-)/ B(B0→D-π+) and B(B$0\atop{s}$ → D$-\atop{s}$π+)/ B(B0 → D-π+). United States: N. p., 2007. Web. doi:10.2172/1352020.
Bolshov, Arkadiy. Measurement of the Ratios of Branching Fractions B(B$0\atop{s}$→D$-\atop{s}$π+π+π-)/ B(B0→D-π+) and B(B$0\atop{s}$ → D$-\atop{s}$π+)/ B(B0 → D-π+). United States. doi:10.2172/1352020.
Bolshov, Arkadiy. Mon . "Measurement of the Ratios of Branching Fractions B(B$0\atop{s}$→D$-\atop{s}$π+π+π-)/ B(B0→D-π+) and B(B$0\atop{s}$ → D$-\atop{s}$π+)/ B(B0 → D-π+)". United States. doi:10.2172/1352020. https://www.osti.gov/servlets/purl/1352020.
@article{osti_1352020,
title = {Measurement of the Ratios of Branching Fractions B(B$0\atop{s}$→D$-\atop{s}$π+π+π-)/ B(B0→D-π+) and B(B$0\atop{s}$ → D$-\atop{s}$π+)/ B(B0 → D-π+)},
author = {Bolshov, Arkadiy},
abstractNote = {We present the measurement of the ratios of branching fractions B(B$0\atop{s}$ → D$-\atop{s}$π+) to B(B0 → D-π+), and B(B$0\atop{s}$→D$-\atop{s}$π+π+π-) to B(B0→D-π+). We analyze data taken with the CDF II detector that corresponds to an integrated luminosity of 355 pb -1 in p$\bar{p}$ collisions at √s= 1.96 TeV at the Fermilab Tevatron.},
doi = {10.2172/1352020},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Thesis/Dissertation:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this thesis or dissertation.

Save / Share:
  • We present the first observation of the decaymore » $$\bar{B}$$$0\atop{s}$$→ D$$±\atop{s}$$ K∓ and measure the relative branching fraction of $$\bar{B}$$$0\atop{s}$$ → D$$±\atop{s}$$ K∓ to $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ π -. The measurement of the relative branching fraction is performed by applying a fit in invariant mass and specific ionization to 1.2 fb -1 of D s(φπ)X data collected with the CDF II detector in pp collisions at √ s = 1.96 TeV at the Fermilab Tevatron collider. We measure B $$\bar{B}$$$0\atop{s}$$ → D$$±\atop{s}$$ K∓ /B $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ π - = 0.107±0.019(stat)±0.008(sys). The statistical significance of the $$\bar{B}$$$0\atop{s}$$ → D$$±\atop{s}$$ K signal is 7.9σ. To cross-check our analysis method, we also measure B $$\bar{B0}$$→ D +K - /B $$\bar{B0}$$ → D +π - and B $$\bar{B0}$$ → D +*K - /B $$\bar{B0}$$ → D *+π - and verify that our results are in agreement with the world average.« less
  • The measurement of Bmore » $$0\atop{s}$$ mixing is one of the flagship analyses for the Run II B physics program. The sensitivity of the measurement to the frequency of B$$0\atop{s}$$ oscillations strongly depends on the number of reconstructed B$$0\atop{s}$$ mesons. They present the measurement of the ratio of branching fractions Br(B$$0\atop{s}$$ → D$$-\atop{s}$$π +)/Br(B 0 → D -π +), which directly influences the number of B$$0\atop{s}$$ events available for the measurement of B$$0\atop{s}$$ mixing at CDF-II. They analyze 115 pb -1 of data collected with the CDF-II detector in p$$\bar{p}$$ collisions at √s = 1.96 TeV using a novel displaced track trigger. They reconstruct 78 ± 11 B$$0\atop{s}$$ → D$$-\atop{s}$$π + decays at 1153 ± 45 B 0 → D -π + decays with good signal to background ratio. This is the world's largest sample of fully reconstructed B$$0\atop{s}$$ → D$$-\atop{s}$$π + decays. They find the ratio of production fractions multiplied by the ratio of branching fractions to be: f s/f d • Br(B$$0\atop{s}$$ → D$$-\atop{s}$$π +)/Br(B 0 → D -π +) = 0.325 ± 0.046(stat) ± 0.034(syst) ± 0.084 (BR). Using the world average value of f s/f d = 0.26 ± 0.03, we infer that the ratio of branching fractions is: Br(B$$0\atop{s}$$ → D$$-\atop{s}$$π +)/Br(B 0 → D -π +) = 1.25 ± 0.18(stat) ± 0.13(syst) ± 0.32(BR) ± 0.14(PR) where the last uncertainty is due to the uncertainty on the world average measurement of the ratio of B$$0\atop{s}$$ to B 0 production rates, f s/f d.« less
  • In this thesis they report the measurement of ratios of branching fractions: β(Bmore » $$0\atop{s}$$ → D$$-\atop{s}$$ π +π +π -)/β(B 0 → D -π +π +π -), and β(B 0 → D -D$$+\atop{s}$$)/β(B 0 → D -π +π +π -), using 355 pb -1 of data collected by CDF detector at the Tevatron p$$\bar{p}$$ collider at √s = 1.96 TeV.« less
  • We present the first observation of the decaymore » $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ K and measure the relative branching fraction of $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ K to $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ π -. The measurement of the relative branching fraction is performed by applying a fit in invariant mass and specific ionization to 1.2 fb -1 of Ds(φπ)X data collected with the CDF II detector in pp collisions at √s = 1.96 TeV at the Fermilab Tevatron collider. We measure B($$\bar{B}$$$0\atop{s}$$ → D± s K∓¢/B($$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ π -) = 0.107±0.019(stat)±0.008(sys). The statistical significance of the $$\bar{B}$$$0\atop{s}$$ → D$$+\atop{s}$$ K signal is 7.9σ. To cross-check our analysis method, we also measure B($$\bar{B0}$$ → D +K -)/B($$\bar{B0}$$ → D +π -) and B($$\bar{B0}$$ → D *+K -)/B($$\bar{B0}$$ → D *+π -) and verify that our results are in agreement with the world average.« less
  • In a data sample of approximately 1.3 fb -1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state Dmore » $$±\atop{s1}$$(2536)has been observed with a measured mass of 2535.7 ± 0.6(stat) ± 0.5(syst) MeV/c 2 via the decay mode B$$0\atop{s}$$ → D$$-\atop{s1}$$(2536)μ +vX followed by D$$±\atop{s1}$$(2536) → D K$$0\atop{S}$$. By normalizing to the known branching ratio Br($$\bar{b}$$ → D* - μ +vX) and to the number of reconstructed D* mesons with an associated identified muon, a first-ever measurement is made of the product branching ratio ($$\bar{b}$$ →} D$$-\atop{s1}$$(2536)μ +vX) • Br(D$$-\atop{s1}$$ → D* -K$$0\atop{S}$$). Assuming that D$$-\atop{s1}$$(2536) production in semileptonic decay is entirely from B$$0\atop{s}$$, an extraction of the semileptonic branching ratio Br(B$$0\atop{s}$$ → D$$-\atop{s1}$$(2536)μ +vX) is made. Comparisons are made with theoretical expectations.« less