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   https://doi.org/10.1002/rcm.7849  

   Vansomeren, Lindsay L. ; Barboza, Perry S. ; Gustine, David D. ; Syndonia Bret-Harte, M. ( May 2017 , Rapid Communications in Mass Spectrometry)
2. Solutions of ϕ (n) = ϕ (n + k) and σ (n) = σ (n + k)

   https://doi.org/10.1093/imrn/rnaa218  

   Ford, Kevin ( August 2020 , International Mathematics Research Notices)

   Abstract We show that for some even $k\leqslant 3570$ and all  $k$ with $442720643463713815200|k$, the equation $\phi (n)=\phi (n+k)$ has infinitely many solutions $n$, where $\phi $ is Euler’s totient function. We also show that for a positive proportion of all $k$, the equation $\sigma (n)=\sigma (n+k)$ has infinitely many solutions $n$. The proofs rely on recent progress on the prime $k$-tuples conjecture by Zhang, Maynard, Tao, and PolyMath.
3. Quantitative Assessment of B−B−B, B−H _b −B, and B−H _t Bonds: From BH ₃ to B ₁₂ H ₁₂ ²⁻

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4. Measurement of the energy dependence of the e+e− → $$ B\overline{B} $$, $$ B{\overline{B}}^{\ast } $$ and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ exclusive cross sections

   https://doi.org/10.1007/JHEP06(2021)137  

   Mizuk, R. ; Bondar, A. ; Adachi, I. ; Aihara, H. ; Al Said, S. ; Asner, D. M. ; Atmacan, H. ; Aulchenko, V. ; Aushev, T. ; Ayad, R. ; et al ( June 2021 , Journal of High Energy Physics)

   A bstract We report the first measurement of the exclusive cross sections e + e − → $$ B\overline{B} $$ B B ¯ , e + e − → $$ B{\overline{B}}^{\ast } $$ B B ¯ ∗ , and e + e − → $$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ in the energy range from 10 . 63 GeV to 11 . 02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy e + e − collider.
5. Measurement of the $B^0\to {\pi }^{-}{\ell }^{+}\nu$ and $B^{+}\to {\eta }^{(\prime )}{\ell }^{+}\nu$ branching fractions, the $B^0\to {\pi }^{-}{\ell }^{+}\nu$ and $B^{+}\to \eta {\ell }^{+}\nu$ form-factor shapes, and determination of $|V_{ub}|$

   https://doi.org/10.1103/PhysRevD.83.052011  

   del Amo Sanchez, P. ; Lees, J. P. ; Poireau, V. ; Prencipe, E. ; Tisserand, V. ; Garra Tico, J. ; Grauges, E. ; Martinelli, M. ; Milanes, D. A. ; Palano, A. ; et al ( March 2011 , Physical Review D)