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

Title: Measurement of the Oscillation Frequency of B s Mesons in the Hadronic Decay Mode B s→ π D s(Φ π)X with the D0 Detector at the Fermilab Tevatron Collider

Abstract

The standard model (SM) of particle physics is a theory, describing three out of four fundamental forces. In this model the Cabibbo-Kobayashi-Maskawa (CKM) matrix describes the transformation between the mass and weak eigenstates of quarks. The matrix properties can be visualized as triangles in the complex plane. A precise measurement of all triangle parameters can be used to verify the validity of the SM. The least precisely measured parameter of the triangle is related to the CKM element |V td|, accessible through the mixing frequency (oscillation) of neutral B mesons, where mixing is the transition of a neutral meson into its anti-particle and vice versa. It is possible to calculate the CKM element |V td| and a related element |V ts| by measuring the mass differences Δm d(Δm s) between neutral B d and $$\bar{B}$$ d (B s and $$\bar{B}$$ s) meson mass eigenstates. This measurement is accomplished by tagging the initial and final state of decaying B mesons and determining their lifetime. Currently the Fermilab Tevatron Collider (providing p$$\bar{p}$$ collisions at {radical}s = 1.96 TeV) is the only place, where B s oscillations can be studied. The first selection of the 'golden', fully hadronic decay mode B smore » πD s(Φπ)X at D0 is presented in this thesis. All data, taken between April 2002 and August 2007 with the D0 detector, corresponding to an integrated luminosity of integral Ldt = 2.8 fb -1 is used. The oscillation frequency Δm s and the ratio |V td|/|V ts| are determined as Δm s = (16.6 -0.4 +0.5(stat) -0.3 +0.4(sys)) ps -1, |V td|/|V ts| = 0.213 -0.003 +0.004(exp) ± 0.008(theor). These results are consistent with the standard model expectations and no evidence for new physics is observable.« less

Authors:
 [1]
  1. Univ. of Mainz (Germany). Inst. for Physics
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960260
Report Number(s):
FERMILAB-THESIS-2009-23
TRN: US0904595
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 TEVATRON; LIFETIME; LUMINOSITY; MASS DIFFERENCE; MESONS; OSCILLATIONS; PHYSICS; QUARKS; STANDARD MODEL; TRANSFORMATIONS; Experiment-HEP

Citation Formats

Weber, Gernot August. Measurement of the Oscillation Frequency of Bs Mesons in the Hadronic Decay Mode Bs→ π Ds(Φ π)X with the D0 Detector at the Fermilab Tevatron Collider. United States: N. p., 2009. Web. doi:10.2172/960260.
Weber, Gernot August. Measurement of the Oscillation Frequency of Bs Mesons in the Hadronic Decay Mode Bs→ π Ds(Φ π)X with the D0 Detector at the Fermilab Tevatron Collider. United States. https://doi.org/10.2172/960260
Weber, Gernot August. Sun . "Measurement of the Oscillation Frequency of Bs Mesons in the Hadronic Decay Mode Bs→ π Ds(Φ π)X with the D0 Detector at the Fermilab Tevatron Collider". United States. https://doi.org/10.2172/960260. https://www.osti.gov/servlets/purl/960260.
@article{osti_960260,
title = {Measurement of the Oscillation Frequency of Bs Mesons in the Hadronic Decay Mode Bs→ π Ds(Φ π)X with the D0 Detector at the Fermilab Tevatron Collider},
author = {Weber, Gernot August},
abstractNote = {The standard model (SM) of particle physics is a theory, describing three out of four fundamental forces. In this model the Cabibbo-Kobayashi-Maskawa (CKM) matrix describes the transformation between the mass and weak eigenstates of quarks. The matrix properties can be visualized as triangles in the complex plane. A precise measurement of all triangle parameters can be used to verify the validity of the SM. The least precisely measured parameter of the triangle is related to the CKM element |Vtd|, accessible through the mixing frequency (oscillation) of neutral B mesons, where mixing is the transition of a neutral meson into its anti-particle and vice versa. It is possible to calculate the CKM element |Vtd| and a related element |Vts| by measuring the mass differences Δmd(Δms) between neutral Bd and $\bar{B}$d (Bs and $\bar{B}$s) meson mass eigenstates. This measurement is accomplished by tagging the initial and final state of decaying B mesons and determining their lifetime. Currently the Fermilab Tevatron Collider (providing p$\bar{p}$ collisions at {radical}s = 1.96 TeV) is the only place, where Bs oscillations can be studied. The first selection of the 'golden', fully hadronic decay mode Bs → πDs(Φπ)X at D0 is presented in this thesis. All data, taken between April 2002 and August 2007 with the D0 detector, corresponding to an integrated luminosity of integral Ldt = 2.8 fb-1 is used. The oscillation frequency Δms and the ratio |Vtd|/|Vts| are determined as Δms = (16.6-0.4+0.5(stat)-0.3+0.4(sys)) ps-1, |Vtd|/|Vts| = 0.213-0.003+0.004(exp) ± 0.008(theor). These results are consistent with the standard model expectations and no evidence for new physics is observable.},
doi = {10.2172/960260},
url = {https://www.osti.gov/biblio/960260}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {3}
}

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: