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Creators/Authors contains: "Varner, G."

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Journal of High Energy Physics)
    A<sc>bstract</sc> We report measurements of thee+e−→$$ B\overline{B} $$ B B ¯ ,$$ B{\overline{B}}^{\ast } $$ B B ¯ ∗ , and$$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle II experiment. We reconstruct oneBmeson in a large number of hadronic final states and use its momentum to identify the production process. In the first 2 – 5 MeV above$$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ threshold, thee+e−→$$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ cross section increases rapidly. This may indicate the presence of a pole close to the threshold. 
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    Free, publicly-accessible full text available October 1, 2025
  2. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
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  3. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
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  4. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
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  5. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
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  6. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
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  7. ; ; ; ; ; ; ; ; ; ; et al (, Journal of High Energy Physics)
    A<sc>bstract</sc> We measure the cross section ofe+e−→ηcJ/ψat the Υ(nS)(n= 1–5) on-resonance and 10.52 GeV off-resonance energy points using the full data sample collected by the Belle detector with an integrated luminosity of 955 fb−1. We also search for double charmonium production ine+e−→ηcJ/ψvia initial state radiation near theηcJ/ψthreshold. No evident signal of the double charmonium state is found, but evidence for thee+e−→ ηcJ/ψprocess is found with a statistical significance greater than 3.3σnear theηcJ/ψthreshold. The average cross section near the threshold is measured and upper limits of cross sections are set for other regions. 
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  8. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
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  9. ; ; ; ; ; ; ; ; ; ; et al (, Journal of High Energy Physics)
    A<sc>bstract</sc> We present a search for the lepton-flavor-violating decays$$ {B}_s^0 $$ B s 0 →ℓ∓τ±, whereℓ=e, μ, using the full data sample of 121 fb−1collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energye+e−collider. We use$$ {B}_s^0{\overline{B}}_s^0 $$ B s 0 B ¯ s 0 events in which one$$ {B}_s^0 $$ B s 0 meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for$$ {B}_s^0 $$ B s 0 → ℓ∓τ±decays and set upper limits on their branching fractions at 90% confidence level as$$ \mathcal{B} $$ B ($$ {B}_s^0 $$ B s 0 → e∓τ±)<14×10−4and$$ \mathcal{B} $$ B ($$ {B}_s^0 $$ B s 0 → μ∓τ±)<7.3×10−4. Our result represents the first upper limit on the$$ {B}_s^0 $$ B s 0 → e∓τ±decay rate. 
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  10. ; ; ; ; ; ; ; ; ; ; et al (, Journal of High Energy Physics)
    A<sc>bstract</sc> We report the first measurement of the inclusivee+e−→$$ b\overline{b} $$ b b ¯ →$$ {D}_s^{\pm } $$ D s ± Xande+e−→$$ b\overline{b} $$ b b ¯ → D0/$$ {\overline{D}}^0 $$ D ¯ 0 Xcross sections in the energy range from 10.63 to 11.02 GeV. Based on these results, we determineσ(e+e−→$$ {B}_s^0{\overline{B}}_s^0 $$ B s 0 B ¯ s 0 X) andσ(e+e−→$$ B\overline{B} $$ B B ¯ X) in the same energy range. We measure the fraction of$$ {B}_s^0 $$ B s 0 events at Υ(10860) to befs= ($$ {22.0}_{-2.1}^{+2.0} $$ 22.0 − 2.1 + 2.0 )%. We determine also the ratio of the$$ {B}_s^0 $$ B s 0 inclusive branching fractions$$ \mathcal{B} $$ B ($$ {B}_s^0 $$ B s 0 → D0/$$ {\overline{D}}^0 $$ D ¯ 0 X)/$$ \mathcal{B} $$ B ($$ {B}_s^0 $$ B s 0 →$$ {D}_s^{\pm } $$ D s ± X) = 0.416 ± 0.018 ± 0.092. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energye+e−collider. 
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