1. Search for rare ▫$b \to d\ell^+\ell^-$▫ transitions at BelleIchiro Adachi, Jyotirmoi Borah, Marko Bračko, Gaetano de Marino, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Manca Mrvar, Rok Pestotnik, Tomaž Podobnik, Ihor Prudiiev, Marko Starič, Luka Šantelj, Valentina Zhukova, Radek Žlebčík, 2024, original scientific article Keywords: Belle II experiment, particle decays
Published in DiRROS: 20.04.2026; Views: 12; Downloads: 7
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2. Test of lepton flavor universality with measurements of ▫$R(D^+)$▫ and ▫$R(D^{\ast +})$▫ using semileptonic tagging at the Belle II experimentIchiro Adachi, Karol Adamczyk, Jyotirmoi Borah, Marko Bračko, Anja Novosel, Ihor Prudiiev, Samo Korpar, Peter Križan, Rok Pestotnik, Tomaž Podobnik, Marko Starič, Luka Šantelj, Paul Feichtinger, Eldar Ganiev, Valentina Zhukova, 2025, original scientific article Keywords: Belle experiment, decays
Published in DiRROS: 20.04.2026; Views: 13; Downloads: 6
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3. Measurement of the branching fraction, polarization, and time-dependent CP asymmetry in ▫$B^0 \to \rho^+ \rho^-$▫ decays and constraint on the CKM angle ▫$\phi_2$▫Ichiro Adachi, Jyotirmoi Borah, Marko Bračko, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Rok Pestotnik, Tomaž Podobnik, Marko Starič, Luka Šantelj, 2025, original scientific article Keywords: Belle experiment, decays
Published in DiRROS: 20.04.2026; Views: 14; Downloads: 7
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4. Measurement of the branching fraction and ▫$CP$▫-violating asymmetry of the decay ▫$B^0 \to \pi^0 \pi^0$▫ using 387 million ▫$\Upsilon (4S)$▫ decays in Belle II dataIchiro Adachi, Jyotirmoi Borah, Marko Bračko, Gaetano de Marino, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Rok Pestotnik, Ihor Prudiiev, Tomaž Podobnik, Marko Starič, Luka Šantelj, Valentina Zhukova, 2025, original scientific article Keywords: Belle experiment, decays
Published in DiRROS: 20.04.2026; Views: 19; Downloads: 8
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5. Observation of the decay ▫$B^0 \to J/\psi \omega$▫ at Belle IIIchiro Adachi, Jyotirmoi Borah, Marko Bračko, Gaetano de Marino, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Rok Pestotnik, Ihor Prudiiev, Tomaž Podobnik, Marko Starič, Luka Šantelj, 2025, original scientific article Keywords: Belle experiment, decays
Published in DiRROS: 20.04.2026; Views: 17; Downloads: 7
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6. Evidence for ▫$B^+ \to K^+ \nu \bar{\nu}$▫ decaysIchiro Adachi, Karol Adamczyk, Jyotirmoi Borah, Marko Bračko, Samo Korpar, Peter Križan, Andrej Lozar, Manca Mrvar, Rok Pestotnik, Tomaž Podobnik, Leonardo B. Rizzuto, Marko Starič, Luka Šantelj, Valentina Zhukova, Paul Feichtinger, Eldar Ganiev, 2024, original scientific article Abstract: We search for the rare decay �+ →�+� ¯ � in a 362 fb−1 sample of electron-positron collisions at the ϒ(4�) resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying � meson in ϒ(4�)→� ¯ � events to suppress background from other decays of the signal � candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying � meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the �+ →�+� ¯ � branching fraction of [2.7±0.5(stat)±0.5(syst)] ×10−5 and [1.1+0.9 −0.8(stat)+0.8 −0.5(syst)] ×10−5, respectively. Combining the results, we determine the branching fraction of the decay �+ →�+� ¯ � to be [2.3±0.5(stat)+0.5 −0.4(syst)] ×10−5, providing the first evidence for this decay at 3.5 standard deviations. The combined result is 2.7 standard deviations above the standard model expectation.
Keywords: Belle experiment, magnetic spectrometer
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7. Measurement of the branching fraction of the decay ▫$B^- \to D^0 \rho(770)^-$▫ at Belle IIIchiro Adachi, Marko Bračko, Paul Feichtinger, Eldar Ganiev, Gaetano de Marino, Samo Korpar, Peter Križan, Manca Mrvar, Anja Novosel, Rok Pestotnik, Tomaž Podobnik, Ihor Prudiiev, Marko Starič, Luka Šantelj, Valentina Zhukova, 2024, original scientific article Abstract: We measure the branching fraction of the decay �−→�0�(770)− using data collected with the Belle II detector. The data contain 387 million � ¯ � pairs produced in �+�− collisions at the ϒ(4�) resonance. We reconstruct 8360±180 decays from an analysis of the distributions of the �− energy and the �(770)− helicity angle. We determine the branching fraction to be (0.939±0.021(stat)±0.050(syst))%, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.
Keywords: Belle experiment, beyond standard model, magnetic spectrometer
Published in DiRROS: 20.04.2026; Views: 17; Downloads: 9
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9. Measurement of ▫$CP$▫ asymmetries in ▫$B^0 \to K^0_S\pi^0\gamma$▫ decays at Belle IIIchiro Adachi, Jyotirmoi Borah, Marko Bračko, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Manca Mrvar, Rok Pestotnik, Tomaž Podobnik, Ihor Prudiiev, Marko Starič, Luka Šantelj, Valentina Zhukova, Radek Žlebčík, 2025, original scientific article Keywords: Belle II experiment, decays
Published in DiRROS: 18.02.2026; Views: 313; Downloads: 157
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10. Search for ▫$P_{c\bar{c}s}(4459)^0$▫ and ▫$P_{c\bar{c}s}(4338)^0$▫ in ▫$\Upsilon(1S,2S)$▫ inclusive decays at BelleIchiro Adachi, Marko Bračko, Paul Feichtinger, Eldar Ganiev, Samo Korpar, Peter Križan, Rok Pestotnik, Tomaž Podobnik, Marko Starič, Luka Šantelj, Valentina Zhukova, Radek Žlebčík, Shiming Zou, 2025, original scientific article Keywords: Belle experiment, decays
Published in DiRROS: 16.02.2026; Views: 388; Downloads: 133
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