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Measurement of the $B^0_d - \bar{B}{^0_d}$ flavor oscillation frequency and study of same side flavor tagging of B mesons in $p\bar p$ collisions
High Energy Physics - Experiment · Submitted 25 Jun 1998
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We measure the flavor oscillation frequency to be $\Delta m_d = 0.471 ^{+0.078}_{-0.068} \pm 0.034 ps^{-1}$.
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The abstract, sentence by sentence
$B^0_d$-$\bar{B}{}^0_d$ oscillations are observed in ``self-tagged'' samples of partially reconstructed $B$ mesons decaying into a lepton and a charmed meson collected in $p\bar p$ collisions at $\sqrt{s} = 1.8$ TeV. A flavor tagging technique is employed which relies upon the correlation between the flavor of $B$ mesons and the charge of nearby particles. We measure the flavor oscillation frequency to be $\Delta m_d = 0.471 ^{+0.078}_{-0.068} \pm 0.034 ps^{-1}$. The tagging method is also demonstrated in exclusive samples of $B^+_u \to J/\psi K^+$ and $B^0_d \to J/\psi K^{*0}(892)$, where similar flavor-charge correlations are observed. The tagging characteristics of the various samples are compared with each other, and with Monte Carlo simulations.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | $B^0_d$-$\bar{B}{}^0_d$ oscillations are observed in ``self-tagged'' samples of partially reconstructed $B$ mesons decaying into a lepton and a charmed meson collected in $p\bar p$ collisions at $\sqrt{s} = 1.8$ TeV. | result 0.65 | 0.92 | 0.23 | asserted 1.00 |
| s1 | A flavor tagging technique is employed which relies upon the correlation between the flavor of $B$ mesons and the charge of nearby particles. | method 1.00 | 0.77 | 0.04 | asserted 1.00 |
| s2 | We measure the flavor oscillation frequency to be $\Delta m_d = 0.471 ^{+0.078}_{-0.068} \pm 0.034 ps^{-1}$. | result 1.00 | 0.97 | 0.74 | asserted 1.00 |
| s3 | The tagging method is also demonstrated in exclusive samples of $B^+_u \to J/\psi K^+$ and $B^0_d \to J/\psi K^{*0}(892)$, where similar flavor-charge correlations are observed. | contribution 0.56 | 0.93 | 0.05 | asserted 1.00 |
| s4 | The tagging characteristics of the various samples are compared with each other, and with Monte Carlo simulations. | method 0.50 | 0.91 | 0.05 | asserted 0.89 |
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The paper
Original abstract
$B^0_d$-$\bar{B}{}^0_d$ oscillations are observed in ``self-tagged'' samples of partially reconstructed $B$ mesons decaying into a lepton and a charmed meson collected in $p\bar p$ collisions at $\sqrt{s} = 1.8$ TeV. A flavor tagging technique is employed which relies upon the correlation between the flavor of $B$ mesons and the charge of nearby particles. We measure the flavor oscillation frequency to be $\Delta m_d = 0.471 ^{+0.078}_{-0.068} \pm 0.034 ps^{-1}$. The tagging method is also demonstrated in exclusive samples of $B^+_u \to J/\psi K^+$ and $B^0_d \to J/\psi K^{*0}(892)$, where similar flavor-charge correlations are observed. The tagging characteristics of the various samples are compared with each other, and with Monte Carlo simulations.
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References
How the literature uses it
3 arXiv papers cite this in 3 sentences
Papers whose main result relates to this one's
States the same result 1 paper
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From the oscillation frequency, we obtain the mass difference between the two B0 mass eigenstates, Delta m_d = 0.471 {+0.078} {-0.068}(stat) +- 0.034 (syst) hbar ps-1, and measure the efficiency and purity of this flavor tagging method for both charged and neutral B mesons.
Papers citing it
Uses its data or values 2 papers
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The current experimental status of the mixing observables reads (taken from Ref. [ref] which is based on the measurements of Refs. [ref] ): [equation] The theory predictions for the mass differences require only the knowledge of $M_12^d,s$, which is dominated by the top quark contribution.
Lifetimes of $b$-hadrons and mixing of neutral $B$-mesons: theoretical and experimental status · Mixing · 0.99
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The SM prediction of the mass differences $Δm_d$ and $Δm_s$ (for $P=B^0, B_s^0$, respectively) can again be expressed as a function of known perturbative factors ($𝒦_2$), CKM matrix elements and non-perturbative quantities such as decay constants $f_P$ and renormalisation group invariant bag parameters $B̂_P$, i.e. [equation] The mass difference $Δm_d$ has been measured by ALEPH [ref] , BaBar [ref] , Belle [ref] , CDF [ref] , D0 [ref] , DELPHI [ref] , OPAL [ref] , L3 [ref] , LHCb [ref] , whilst $Δm_s$ has only been measured by CDF [ref] and LHCb [ref] .
SU(3)-breaking ratios for $D_{(s)}$ and $B_{(s)}$ mesons · Introduction · 0.80
Cites it as background 1 paper
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Same-side (SS) algorithms look for particles produced in association with the reconstructed meson in the hadronisation process [ref] .
A new algorithm for identifying the flavour of $B_s^0$ mesons at LHCb · Introduction · 0.98
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