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View article: HFLAV input to the 2026 update of the European Strategy for Particle Physics
HFLAV input to the 2026 update of the European Strategy for Particle Physics Open
Heavy-flavour physics is an essential component of the particle-physics programme, offering critical tests of the Standard Model and far-reaching sensitivity to physics beyond it. Experiments such as LHCb, Belle II, and BESIII drive progre…
View article: Observations of the singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$, $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$, and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ at Belle and Belle II
Observations of the singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$, $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$, and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ at Belle and Belle II Open
A bstract Using data samples of 983.0 fb − 1 and 427.9 fb − 1 accumulated with the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e + e − colliders, singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K…
View article: Measurement of $B^+\toτ^+ν_τ$ branching fraction with a hadronic tagging method at Belle II
Measurement of $B^+\toτ^+ν_τ$ branching fraction with a hadronic tagging method at Belle II Open
We present a measurement of the branching fraction of $B^+\toτ^+ν_τ$ decays using $(387\pm6)\times 10^6$ $Υ(4S)$ collected between 2019 and 2022 with the Belle II detector at the SuperKEKB $e^+e^-$ collider. We reconstruct the accompanying…
View article: Escape Rooms as a tool for science outreach: the HEPscape! experience
Escape Rooms as a tool for science outreach: the HEPscape! experience Open
Escape rooms have gained significant popularity in recent years, offering a blend of puzzle-solving and treasure hunt-like challenges, making them an enjoyable activity for the participants and a team-building experience.\nMore importantly…
View article: Measurement of time-dependent $CP$ asymmetries in $B^0 \to K_{\rm S}^0 \: π^{+} π^{-} γ$ decays at Belle and Belle II
Measurement of time-dependent $CP$ asymmetries in $B^0 \to K_{\rm S}^0 \: π^{+} π^{-} γ$ decays at Belle and Belle II Open
We present a measurement of the time-dependent $CP$ asymmetry in $B^0 \to K_{\rm S}^0 \: π^{+} π^{-} γ$ decays using a data set of 365 fb$^{-1}$ recorded by the Belle II experiment and the final data set of 711 fb$^{-1}$ recorded by the Be…
View article: Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}π^{+}π^{+}$ decays using triple and quadruple products
Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}π^{+}π^{+}$ decays using triple and quadruple products Open
We perform the first search for $C\!P$ violation in ${D_{(s)}^{+}\to{}K_{S}^{0}K^{-}π^{+}π^{+}}$ decays. We use a combined data set from the Belle and Belle II experiments, which study $e^+e^-$ collisions at center-of-mass energies at or n…
View article: The Belle II Detector Upgrades Framework Conceptual Design Report
The Belle II Detector Upgrades Framework Conceptual Design Report Open
We describe the planned near-term and potential longer-term upgrades of the Belle II detector at the SuperKEKB electron-positron collider operating at the KEK laboratory in Tsukuba, Japan. These upgrades will allow increasingly sensitive s…
View article: Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II
Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II Open
We report a measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integra…
View article: Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>-Meson Decays at Belle II
Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic -Meson Decays at Belle II Open
We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189 fb^{-1} from elect…
View article: Precise measurement of the $D^+_s$ lifetime at Belle II
Precise measurement of the $D^+_s$ lifetime at Belle II Open
We measure the lifetime of the $D_s^+$ meson using a data sample of 207 fb$^{-1}$ collected by the Belle II experiment running at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. The lifetime is determined by fitting the decay-time dist…
View article: Present and future CKM studies from B physics at $e^+e^-$ colliders
Present and future CKM studies from B physics at $e^+e^-$ colliders Open
I will review the main motivations for pursuing the study of B physics at e+e- colliders, with a view towards improving the precision of observables that are sensitive to the elements of the CKM matrix. After briefly presenting the Belle I…
View article: Snowmass White Paper: Belle II physics reach and plans for the next decade and beyond
Snowmass White Paper: Belle II physics reach and plans for the next decade and beyond Open
Belle II is an experiment operating at the intensity frontier. Over the next decades, it will record the decay of billions of bottom mesons, charm hadrons, and tau leptons produced in 10 GeV electron-positron collisions at the SuperKEKB hi…
View article: B-flavor tagging at Belle II
B-flavor tagging at Belle II Open
We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom (B) mesons at Belle II. The algorithms provide essential inputs for measurements of quark-flavor mixing and charge-parity violation. We va…
View article: Measurement of the $\Omega_c^0$ lifetime at Belle II
Measurement of the $\Omega_c^0$ lifetime at Belle II Open
We report on a measurement of the $\Omega_c^0$ lifetime using $\Omega_c^0 \to \Omega^-\pi^+$ decays reconstructed in $e^+e^-\to c\bar{c}$ data collected by the Belle II experiment and corresponding to $207~{\rm fb^{-1}}$ of integrated lumi…
View article: Combined analysis of Belle and Belle II data to determine the CKM angle $ \phi_{3} $ using $B^+ \to D(K_{S}^0 h^- h^+) h^+$ decays.
Combined analysis of Belle and Belle II data to determine the CKM angle $ \phi_{3} $ using $B^+ \to D(K_{S}^0 h^- h^+) h^+$ decays. Open
We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle $ \phi_{3} $ (also known as~$\gamma$) using a model-independent Dalitz plot analysis of \linebreak $B^+\to D\left(K_{S}^{0}h^{+}h^{-}\right)h^+$, where $D$ …
View article: EOSC-Pillar D6.1 State of the Art and Community Needs Report from Use Cases
EOSC-Pillar D6.1 State of the Art and Community Needs Report from Use Cases Open
The main purpose of this document is twofold:\n\n\n\t(i) describe the Use Cases\n\t(ii) analyze their technical requirements in compliance with EOSC framework\n\n\nThis deliverable reports on the findings of the Use Cases analysis, with a …
View article: Time dependent $CP$ violation measurements at Belle II
Time dependent $CP$ violation measurements at Belle II Open
Time dependent CP-violation phenomena are a powerful tool to precisely measure fundamental parameters of the Standard Model and search for New Physics. The Belle II experiment is a substantial upgrade of the Belle detector and will operate…
View article: Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−¯νX
Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−¯νX Open
We present a search for the decay B + → ℓ + ν ℓ ( ℓ = τ , μ , or e ) in ( 458.9 ± 5.1 ) × 10 6 B ¯¯¯ B pairs recorded with the BABAR detector at the PEP-II B -factory. We search for these B decays in a sample of B + B − events where one B …
View article: Physics Prospects at SuperKEKB/Belle II
Physics Prospects at SuperKEKB/Belle II Open
The Belle II Experiment is in its final phase of construction and the SuperKEKB accelerator has successfully completed the first phase of commissioning. With an expected integrated luminosity of 50 ab-1 to be collected by the year 2025, th…
View article: Summary of CKM 2016 Working Group 4 : mixing and mixing-related $CP$ violation in the $B$ system
Summary of CKM 2016 Working Group 4 : mixing and mixing-related $CP$ violation in the $B$ system Open
We summarize the new results on $B$ meson mixing and mixing-related $CP$ violation presented at CKM2016. We place these results in the context of both previous experimental measurements and the most recent theoretical developments in the f…
View article: Summary of Working Group 4 : mixing and mixing-related $CP$ violation in the $B$ system
Summary of Working Group 4 : mixing and mixing-related $CP$ violation in the $B$ system Open
We summarize the new results on $B$ meson mixing and mixing-related $CP$\nviolation presented at CKM2016. We place these results in the context of both\nprevious experimental measurements and the most recent theoretical developments\nin th…
View article: Measurement of angular asymmetries in the decays B → K[superscript *]ℓ[superscript +]ℓ[superscript −]
Measurement of angular asymmetries in the decays B → K[superscript *]ℓ[superscript +]ℓ[superscript −] Open
We study the lepton forward-backward asymmetry A[subscript FB] and the longitudinal K[superscript *] polarization F[subscript L], as well as an observable P[subscript 2] derived from them, in the rare decays B → K[superscript *]ℓ[superscri…
View article: Search for mixing-induced CP violation using partial reconstruction of [bar over B][superscript 0] → D[superscript *+]}Xℓ[superscript -][bar over ν][subscript ℓ]and kaon tagging
Search for mixing-induced CP violation using partial reconstruction of [bar over B][superscript 0] → D[superscript *+]}Xℓ[superscript -][bar over ν][subscript ℓ]and kaon tagging Open
We describe in detail a previously published measurement of CP violation in B[superscript 0]-[bar over B][superscript 0] oscillations, based on an integrated luminosity of 425.7 fb[superscript -1] collected by the BABAR experiment at the P…
View article: Collins asymmetries in inclusive charged KK and Kπ pairs produced in e[superscript +]e[superscript -] annihilation
Collins asymmetries in inclusive charged KK and Kπ pairs produced in e[superscript +]e[superscript -] annihilation Open
We present measurements of Collins asymmetries in the inclusive process e[superscript +]e[superscxript -] → h[subscript 1]h[subscript 2]X, h[subscript 1]h[subscript 2] = KK, Kπ, ππ, at the center-of-mass energy of 10.6 GeV, using a data sa…