Search for the decay $B^0\to {\hat{I}}^3{\hat{I}}^3$ using Belle and Belle II data

Belle, Belle II Collaborations, : +407

We report the result of a search for the rare decay $B^0\to {\hat{I}}^3{\hat{I}}^3$ using a combined dataset of $753\times 10^6$ $B\bar{B}$ pairs collected by the Belle experiment and $387\times…

Measurement of branching fractions of $\hat{I}{›}_c^{+}\to p{K}_S^0{K}_S^0$ and $\hat{I}{›}_c^{+}\to p{K}_S^0\hat{I}\cdot$ at Belle

Belle Collaboration, L. K. Li, K. Kinoshita +204

We present a study of a singly Cabibbo-suppressed decay $\hat{I}{›}_c^{+}\to p{K}_S^0{K}_S^0$ and a Cabibbo-favored decay $\hat{I}{›}_c^{+}\to p{K}_S^0\hat{I}\cdot$ based on 980 $\mathrm{f}{\mathrm{b}}^{-1}$ of data collected by t…

Evidence for the decay $\hat{I}{\text{c◯}}_c^0\to \ddot{I}{€}^{+}\hat{I}\text{c◯}(2012{)}^{-}\to \ddot{I}{€}^{+}(\bar{K}\hat{I}ž{)}^{-}$

Belle Collaboration, Y. Li, S. S. Tang +190

Using a data sample of 980~fb${}^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present evidence for the $\hat{I}\text{c◯}(2012{)}^{-}$ in the re…

Search for the decay $B_s^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ at Belle

Belle Collaboration, J. Borah, B. Bhuyan +211

We report the results of the first search for the decay $B_s^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ using $121.4\mathrm{f}{\mathrm{b}}^{-1}$ of data collected at the $\hat{I}\yen (5\mathrm{S})$ resonance with the Belle detecto…

Reconstruction of $B\to \ddot{I}\ell \hat{I}{½}_{\ell }$ decays identified using hadronic decays of the recoil $B$ meson in 2019 -- 2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +580

We present results on the semileptonic decays $B^0\to \ddot{I}{}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ and $B^{+}\to \ddot{I}{}^0{\ell }^{+}\hat{I}{½}_{\ell }$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEK…

Tests of light-lepton universality in angular asymmetries of $B^0\to D^{\ast -}\ell \hat{I}½$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +416

We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure f…

Two-particle angular correlations in $e^{+}{e}^{-}$ collisions to hadronic final states in two reference coordinates at Belle

Belle Collaboration, Y. -C. Chen, Y. -J. Lee +188

We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis, and propose the latter to b…

Measurement of two-photon decay width of $\ddot{I}{‡}_{c2}(1P)$ in ${\hat{I}}^3{\hat{I}}^3\to \ddot{I}{‡}_{c2}(1P)\to J/\ddot{I}ˆ{\hat{I}}^3$ at Belle

The Belle Collaboration, Y. Seino, K. Hayasaka +194

We report the measurement of the two-photon decay width of $\ddot{I}{‡}_{c2}(1P)$ in two-photon processes at the Belle experiment. We analyze the process $ γγ\rightarrow χ_{c2}(1P) \righ…

Search for the Decay $B_s^0\to \hat{I}{\cdot }^{\prime }\hat{I}\cdot$

Belle Collaboration, N. K. Nisar, V. Savinov +197

We report the results of the first search for the decay $B_s^0\to \hat{I}{\cdot }^{\prime }\hat{I}\cdot$ using $121.4{\text{fb}}^{-1}$ of data collected at the $\hat{I}\yen (5S)$ resonance with the Belle d…

Search for lepton-flavor-violating $\ddot{I}„$ decays into a lepton and a vector meson using the full Belle data sample

Belle Collaboration, N. Tsuzuki, K. Inami +180

Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of $\ddot{I}„$ lepton decays into a light charged lepton ($\ell$ = $e^{\pm }$ or $μ^{…

Study of $B^{+}\to p\overline{n}\ddot{I}{€}^0$

Belle Collaboration, K. -N. Chu, Y. -R. Lin +203

We search for the tree-diagram dominated process $B^{+}\to p\overline{n}\ddot{I}{€}^0$, using a data sample of $772\times 10^{6}B\overline{B}$ pairs collected at the $\hat{I}\yen (4S)$ resona…

Measurements of the branching fractions of the semileptonic decays $\hat{I}{ž}_c^0\to \hat{I}{ž}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ and the asymmetry parameter of $\hat{I}{ž}_c^0\to \hat{I}{ž}^{-}\ddot{I}{€}^{+}$

Belle Collaboration, Y. B. Li, C. P. Shen +182

Using data samples of 89.5 and 711 fb${}^{-1}$ recorded at energies of $\sqrt{s}=10.52$ and $10.58$ GeV, respectively, with the Belle detector at the KEKB $e^{+}{e}^{-}$ collider, we repor…

Measurement of the branching fraction of $\hat{I}{›}_c^{+}\to p\ddot{I}‰$ decay at Belle

Belle Collaboration, S. X. Li, L. K. Li +193

Using 980.6 $\mathrm{f}{\mathrm{b}}^{-1}$ of data collected with the Belle detector operating at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present a measurement of the branching fraction of…

Measurement of the branching fraction of $\hat{I}{ž}_c^0\to \hat{I}{›}_c^{+}\ddot{I}{€}^{-}$ at Belle

Belle Collaboration, S. S. Tang, Y. B. Li +171

Based on a data sample of 983 fb${}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present the study of the heavy-flavor-conserving decay…

Measurement of the branching fraction and $CP$ asymmetry for $B\to {\bar{D}}^0\ddot{I}€$ decays

Belle Collaboration, T. Bloomfield, M. E. Sevior +212

We measure the branching fractions and $CP$ asymmetries for the decays $B^0\to {\bar{D}}^0\ddot{I}{€}^0$ and $B^{+}\to {\bar{D}}^0\ddot{I}{€}^{+}$, using a data sample of $772\times 10^6$ $B\b…

First Measurement of the $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ decay

Belle Collaboration, S. X. Li, J. X. Cui +197

We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ with $\hat{I}{\cdot }^{\prime }\to \hat{I}\cdot \ddot{I}{€}^{+}\ddot{I}{€}^{-}$, using a data sample correspond…

Measurement of the integrated luminosity of data samples collected during 2019-2022 by the Belle II experiment

The Belle II Collaboration, I. Adachi, L. Aggarwal +404

A series of data samples was collected with the Belle~II detector at the SuperKEKB collider from March 2019 to June 2022. We determine the integrated luminosities of these data sam…

First measurement of the $B^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^0\ddot{I}{€}^0$ branching fraction and \textit{CP} asymmetry

Belle Collaboration, Y. -T. Lai, I. Adachi +198

We study $B^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^0\ddot{I}{€}^0$ using 711 ${\mathrm{fb}}^{-1}$ of data collected at the $\hat{I}\yen (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ colli…

Evidence for the singly Cabibbo-suppressed decay $\hat{I}{\text{c◯}}_c^0\to \hat{I}{ž}^{-}\ddot{I}{€}^{+}$ and search for $\hat{I}{\text{c◯}}_c^0\to \hat{I}{ž}^{-}{K}^{+}$ and $\hat{I}{\text{c◯}}^{-}{K}^{+}$ decays at Belle

Belle Collaboration, X. Han, S. Jia +170

Using a data sample of 980 fb${}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we study for the first time the singly Cabibbo-suppressed de…

Search for the dark photon in $B^0\to A^{\prime }{A}^{\prime }$, $A^{\prime }\to e^{+}{e}^{-}$, $\hat{I}{¼}^{+}\hat{I}{¼}^{-}$, and $\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decays at Belle

S. -H. Park, Y. -J. Kwon, I. Adachi +216

We present a search for the dark photon $A^{\prime }$ in the $B^0\to A^{\prime }{A}^{\prime }$ decays, where $A^{\prime }$ subsequently decays to $e^{+}{e}^{-}$, $\hat{I}{¼}^{+}\hat{I}{¼}^{-}$, and $π^+ π^-…

Angular analysis of $B\to K^{\ast }{e}^{+}{e}^{-}$ in the low-$q^2$ region with new electron identification at Belle

Belle Collaboration, D. Ferlewicz, P. Urquijo +167

We perform an angular analysis of the $B\to K^{\ast }{e}^{+}{e}^{-}$ decay for the dielectron mass squared, $q^2$, range of $0.0008$ to $1.1200{\text{GeV}}^2/c^4$ using the full Belle data se…

Measurement of the Resonant and Non-Resonant Branching Ratios in $\hat{I}{ž}_c^0\to \hat{I}{ž}^0{K}^{+}{K}^{-}$

J. T. McNeil, J. Yelton, J. Bennett +192

Using the entire data sample of $980$ $f{b}^{-1}$ integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present an amplitude…

Study of $e^{+}{e}^{-}\to \hat{I}\yen (1S,2S)\hat{\mathrm{I}}\cdot$ and $e^{+}{e}^{-}\to \hat{I}\yen (1S)\hat{\mathrm{I}}{\cdot }^{\prime }$ at $\sqrt{s}=10.866$ GeV with the Belle detector

Belle Collaboration, E. Kovalenko, A. Garmash +179

We report the first observation of the processes $e^{+}{e}^{-}\to \hat{I}\yen (1S,2S)\hat{\mathrm{I}}\cdot$ at $\sqrt{s}=10.866$~GeV with a $10.2\ddot{I}ƒ$ and $16.5\ddot{I}ƒ$ significance respectively. The measured Born cross…

Measurements of $q^2$ Moments of Inclusive $B\to X_c{\ell }^{+}\hat{I}{½}_{\ell }$ Decays with Hadronic Tagging

Belle Collaboration, R. van Tonder, L. Cao +202

We present the measurement of the first to fourth order moments of the four-momentum transfer squared, $q^2$, of inclusive $B\to X_c{\ell }^{+}\hat{I}{½}_{\ell }$ decays using the ful…

Measurement of Branching Fraction and Search for $CP$ Violation in $B\to \ddot{I}•\ddot{I}•K$

S. Mohanty, A. B. Kaliyar, V. Gaur +183

We report the measurement of branching fractions and $CP$-violation asymmetries in $B\to \ddot{I}•\ddot{I}•K$ decays based on a $711{\mathrm{fb}}^{-1}$ data sample containing $772\times 10^6$ $B\ba…

Measurement of the energy dependence of the $e^{+}{e}^{-}\to B\bar{B}$, $B\bar{B}{}^{\ast }$, and $B^{\ast }\bar{B}{}^{\ast }$ cross sections at Belle~II

Belle II Collaboration, I. Adachi, L. Aggarwal +466

We report measurements of the $e^{+}{e}^{-}\to B\bar{B}$, $B\bar{B}{}^{\ast }$, and $B^{\ast }\bar{B}{}^{\ast }$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected b…

Search for $B^0\to \ddot{I}{„}^{\pm }{\ell }^{\mp }$ ($\ell =e,\hat{I}¼$) with a hadronic tagging method at Belle

Belle Collaboration, H. Atmacan, A. J. Schwartz +219

We present a search for the lepton-flavor-violating decays $B^0\to \ddot{I}{„}^{\pm }{\ell }^{\mp }$, where $\ell =(e,\hat{I}¼)$, using the full data sample of $772\times 10^6$ $B\overline{B}$ pair…

Search for lepton-flavor-violating tau-lepton decays to $\ell {\hat{I}}^3$ at Belle

K. Uno, K. Hayasaka, K. Inami +178

Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays $τ^{\pm}\rightarrow…

Determination of $|V_{cb}|$ using ${\overline{B}}^0\to D^{\ast +}{\ell }^{-}\bar{\hat{I}}{½}_{\ell }$ decays with Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +416

We determine the CKM matrix-element magnitude $|V_{cb}|$ using ${\overline{B}}^0\to D^{\ast +}{\ell }^{-}\bar{\hat{I}}{½}_{\ell }$ decays reconstructed in $189{\mathrm{fb}}^{-1}$ of collision data colle…

Search for charged-lepton flavor violation in $\hat{I}\yen (2S)\to {\ell }^{\mp }\ddot{I}{„}^{\pm }$ ($\ell =e,\hat{I}¼$) decays at Belle

R. Dhamija, S. Nishida, A. Giri +178

We report a search for the charged-lepton flavor violation in $\hat{I}\yen (2S)\to {\ell }^{\mp }\ddot{I}{„}^{\pm }$ ($\ell =e,\hat{I}¼$) decays using a $25~\fbi$ $\hat{I}\yen (2S)$ sample collected by the Belle detector at…

Search for the $\hat{I}{\cdot }_{c2}(1D)$ in $e^{+}{e}^{-}\to {\hat{I}}^3\hat{I}{\cdot }_{c2}(1D)$ at $\sqrt{s}$ near 10.6 GeV at Belle

Belle Collaboration, S. Jia, C. P. Shen +198

For the first time we search for the $\hat{I}{\cdot }_{c2}(1D)$ in $e^{+}{e}^{-}\to {\hat{I}}^3\hat{I}{\cdot }_{c2}(1D)$ at $\sqrt{s}$ = 10.52, 10.58, and 10.867 GeV with data samples of 89.5 fb${}^{-1}$, 711 fb${}^{-1}$, and…

Search for tetraquark states $X_{cc\bar{s}\bar{s}}$ in $D_s^{+}{D}_s^{+}(D_s^{\ast +}{D}_s^{\ast +})$ final states at Belle

Belle Collaboration, X. Y. Gao, Y. Li +206

A search for double-heavy tetraquark state candidates $X_{cc\bar{s}\bar{s}}$ decaying to $D_s^{+}{D}_s^{+}$ and $D_s^{\ast +}{D}_s^{\ast +}$ is presented for the first time using the…

Search for a doubly-charged $DDK$ bound state in $\hat{I}\yen (1S,2S)$ inclusive decays and via direct production in $e^{+}{e}^{-}$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV

Belle Collaboration, Y. Li, S. Jia +205

We report the results of a first search for a doubly-charged $DDK$ bound state, denoted the $R^{++}$, in $\hat{I}\yen (1S)$ and $\hat{I}\yen (2S)$ inclusive decays and via direct production in $e^+e^-…

Measurement of the branching fraction and $CP$ asymmetry of $B^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ decays using $198\times 10^6$ $B\overline{B}$ pairs in Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +425

We report measurements of the branching fraction and $CP$ asymmetry in $B^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ decays reconstructed at Belle II in an electron-positron collision sample conta…

An improved search for the electric dipole moment of the $\ddot{I}„$ lepton

K. Inami, K. Hayasaka, I. Adachi +181

We report a measurement of the electric dipole moment of the $\ddot{I}„$ lepton ($d_{\ddot{I}}„$) using an 833~fb${}^{-1}$ data sample collected near the $\hat{I}\yen (4S)$ resonance, with the Belle detector…

Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0\to \ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ and $B^{+}\to \ddot{I}{}^0{\ell }^{+}\hat{I}{½}_{\ell }$ decays

Belle II Collaboration, I. Adachi, L. Aggarwal +417

We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0\to \ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ and $B^{+}\to \ddot{I}{}^0{\ell }^{+}\hat{I}{½}_{\ell }$, where $\ell =…

Search for lepton flavor-violating decay modes $B^0\to K_S^0\ddot{I}{„}^{\pm }{\ell }^{\mp }(\ell =\hat{I}¼,e)$ with hadronic $B$-tagging at Belle and Belle II

Belle, Belle II Collaborations, : +425

We present the first search for the lepton flavor-violating decay modes $B^0\to K_S^0\ddot{I}{„}^{\pm }{\ell }^{\mp }(\ell =\hat{I}¼,e)$ using the 711 fb${}^{-1}$ and 365 fb${}^{-1}$ data samples…

Measurement of Differential Distributions of $B\to D^{\ast }\ell \bar{\hat{I}}{½}_{\ell }$ and Implications on $|V_{cb}|$

Belle Collaboration, M. T. Prim, F. Bernlochner +212

We present a measurement of the differential shapes of exclusive $B\to D^{\ast }\ell \bar{\hat{I}}{½}_{\ell }$ ($B=B^{-},{\bar{B}}^0$ and $\ell =e,\hat{I}¼$) decays with hadronic tag-side reconstruction…

The study of ${\hat{I}}^3{\hat{I}}^3\to {\hat{I}}^3\ddot{I}ˆ(2S)$ at Belle

X. L. Wang, B. S. Gao, W. J. Zhu +200

Using $980\mathrm{f}{\mathrm{b}}^{-1}$ of data on and around the $\hat{I}\yen (nS)(n=1,2,3,4,5)$ resonances collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, the two-photon…

Search for $B{}_s^0\to {\ell }^{\mp }\ddot{I}{„}^{\pm }$ with the Semi-leptonic Tagging Method at Belle

Belle Collaboration, L. Nayak, S. Nishida +189

We present a search for the lepton-flavor-violating decays $B{}_s^0\to {\ell }^{\mp }\ddot{I}{„}^{\pm }$, where $\ell =e,\hat{I}¼$, using the full data sample of $121{\mathrm{fb}}^{-1}$ coll…

Measurement of the $D^0\to K^{-}\ddot{I}{€}^{+}{e}^{+}{e}^{-}$ branching fraction and search for $D^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{e}^{+}{e}^{-}$ and $D^0\to K^{+}{K}^{-}{e}^{+}{e}^{-}$ decays at Belle

Belle, Belle II Collaborations, : +481

We present a study of the rare charm meson decays $D^0\to K^{+}{K}^{-}{e}^{+}{e}^{-}$, $\ddot{I}{€}^{+}\ddot{I}{€}^{-}{e}^{+}{e}^{-}$, and $K^{-}\ddot{I}{€}^{+}{e}^{+}{e}^{-}$ using a 942 fb${}^{-1}$ data se…

Search for the decay $B_s^0\to J/\ddot{I}ˆ\ddot{I}{€}^0$ at Belle experiment

Belle Collaboration, D. Kumar, B. Bhuyan +164

We have analyzed 121.4 fb${}^{-1}$ of data collected at the $\hat{I}\yen (5S)$ resonance by the Belle experiment using the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider to search for the decay $B_s…

Study of $\ddot{I}{‡}_{bJ}(2P)\to \ddot{I}‰\hat{I}\yen (1S)$ at Belle

Belle Collaboration, Z. S. Stottler, T. K. Pedlar +179

We report a study of the hadronic transitions $\ddot{I}{‡}_{bJ}(2P)\to \ddot{I}‰\hat{I}\yen (1S)$, with $\ddot{I}‰\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$, using $28.2\times 10^6\hat{I}\yen (3S)$ mesons recorded by the Belle detector. We pres…

Study of $\ddot{I}{‡}_{bJ}(nP)\to \ddot{I}‰\hat{I}\yen (1S)$ at Belle

Belle Collaboration, A. Abdesselam, I. Adachi +470

We report results from a study of hadronic transitions of the $\ddot{I}{‡}_{bJ}(nP)$ states of bottomonium at Belle. The $P$-wave states are reconstructed in transitions to the $\hat{I}\yen (1S)$ wit…

Measurement of $CP$ asymmetries in $B^0\to \ddot{I}•K_S^0$ decays with Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +432

We present a measurement of time-dependent rate asymmetries in $B^0\to \ddot{I}•K_S^0$ decays to search for non-standard-model physics in $b\to q\overline{q}s$ transitions. The data samp…

Measurement of the branching fraction and $CP$-violating asymmetry of the decay $B^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ using $387$ million bottom-antibottom meson pairs in Belle II data

Belle II Collaboration, I. Adachi, L. Aggarwal +437

We measure the branching fraction and $CP$-violating flavor-dependent rate asymmetry of $B^0\to \ddot{I}{€}^0\ddot{I}{€}^0$ decays reconstructed using the Belle II detector in an electro…

Measurement of the $e^{+}{e}^{-}\to B_s^0{\bar{B}}_s^{0}X$ cross section in the energy range from $10.63$ to $11.02$ GeV using inclusive $D_s^{\pm }$ and $D^0$ production

Belle Collaboration, V. Zhukova, R. Mizuk +188

We report the first measurement of the inclusive $e^{+}{e}^{-}\to b\bar{b}\to D_s^{\pm }X$ and $e^{+}{e}^{-}\to b\bar{b}\to D^0/{\bar{D}}^{0}X$ cross sections in the energy range from $10.63$ t…

Observation of $B\to D^{(\ast )}{K}^{-}{K}_S^0$ decays using the 2019-2022 Belle II data sample

Belle II Collaboration, F. Abudinén, I. Adachi +575

We present a measurement of the branching fractions of four $B^{0,-}\to D^{(\ast )+,0}{K}^{-}{K}_S^0$ decay modes. The measurement is based on data from SuperKEKB electron-positron colli…

First observation of $B\to {\bar{D}}_1(\to \bar{D}\ddot{I}{€}^{+}\ddot{I}{€}^{-}){\ell }^{+}\hat{I}{½}_{\ell }$ and measurement of the $B\to {\bar{D}}^{(\ast )}\ddot{I}€{\ell }^{+}\hat{I}{½}_{\ell }$ and $B\to {\bar{D}}^{(\ast )}\ddot{I}{€}^{+}\ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ branching fractions with hadronic tagging at Belle

Belle Collaboration, F. Meier, A. Vossen +202

We report measurements of the ratios of branching fractions for $B\to {\bar{D}}^{(\ast )}\ddot{I}€{\ell }^{+}\hat{I}{½}_{\ell }$ and $B\to {\bar{D}}^{(\ast )}\ddot{I}{€}^{+}\ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ relative to $B \to \bar{D}^*\ell…

Evidence of $h_b(\text{2P})\to \hat{I}\yen (\text{1S})\hat{I}\cdot$ decay and search for $h_b(\text{1P,2P})\to \hat{I}\yen (\text{1S})\ddot{I}{€}^0$ with the Belle detector

Belle Collaboration, E. Kovalenko, I. Adachi +164

We report the first evidence for the $h_b(\text{2P})\to \hat{I}\yen (\text{1S})\hat{I}\cdot$ transition with a significance of $3.5$ standard deviations. The decay branching fraction is measured to…

Measurements of the branching fractions of $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ and $\hat{I}{›}_c^{+}\to p\ddot{I}{€}^0$ decays at Belle

Belle Collaboration, S. X. Li, C. P. Shen +204

We report measurements of the branching fractions of singly Cabibbo-suppressed decays $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ and $\hat{I}{›}_c^{+}\to p\ddot{I}{€}^0$ using the full Belle data sample corresponding to an…

First test of Lepton Flavor Universality in the charmed baryon decays $\hat{I}{\text{c◯}}_c^0\to \hat{I}{\text{c◯}}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ using data of the Belle experiment

Belle Collaboration, Y. B. Li, C. P. Shen +203

We present the first observation of the $\hat{I}{\text{c◯}}_c^0\to \hat{I}{\text{c◯}}^{-}\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ decay and present measurements of the branching fraction ratios of the $Ω_{c}^{0} \to Ω^{-} \ell^{+}…

Search for Two-Body $B$ Meson Decays to $\hat{I}{›}^0$ and $\hat{I}{\text{c◯}}_c^{(\ast )0}$

Belle Collaboration, V. Savinov, I. Adachi +146

We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $\hat{I}{›}^0$ and $\hat{I}{\text{c◯}}_c^{(\ast )0}$ using 711~${\rm fb^…

Search for lepton-number- and baryon-number-violating tau decays at Belle

D. Sahoo, G. B. Mohanty, K. Trabelsi +222

We search for lepton-number- and baryon-number-violating decays $\ddot{I}{„}^{-}\to \overline{p}{e}^{+}{e}^{-}$, $p{e}^{-}{e}^{-}$, $\overline{p}{e}^{+}\hat{I}{¼}^{-}$, $\overline{p}{e}^{-}\hat{I}{¼}^{+}$, $\overline{p…

Measurement of the branching fractions for Cabibbo-suppressed decays $D^{+}\to K^{+}{K}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$ and $D_{(s)}^{+}\to K^{+}\ddot{I}{€}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$ at Belle

Belle Collaboration, L. K. Li, A. J. Schwartz +197

We present measurements of the branching fractions for the singly Cabibbo-suppressed decays $D^{+}\to K^{+}{K}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$ and $D_s^{+}\to K^{+}\ddot{I}{€}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$, and the doubly…

Search for lepton-flavor-violating $\ddot{I}{„}^{-}\to {\ell }^{-}\ddot{I}•$ decays in 2019-2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +575

We report a search for lepton-flavor-violating decays $\ddot{I}{„}^{-}\to {\ell }^{-}\ddot{I}•$ (${\ell }^{-}=e^{-},\hat{I}{¼}^{-}$) at the Belle II experiment, using a sample of electron-positron data produced at the…

Search for rare decays $B^{+}\to D_s^{(\ast )+}\hat{I}\cdot$, $D_s^{(\ast )+}{\bar{K}}^0$, $D^{+}\hat{I}\cdot$, and $D^{+}{K}^0$

Belle Collaboration, M. Kumar, V. Bhardwaj +196

We present a study of rare decay modes $B^{+}\to D_s^{+}{h}^0$, $B^{+}\to D_s^{\ast +}{h}^0$, and $B^{+}\to D^{+}{h}^0$, where $h^0$ denotes the neutral mesons $\hat{I}\cdot$ or $K^{…

Search for $CP$ violation in $D_{(s)}^{+}\to K^{+}{K}_S^0{h}^{+}{h}^{-}$ $(h=K,\ddot{I}€)$ decays and observation of the Cabibbo-suppressed decay $D_s^{+}\to K^{+}{K}^{-}{K}_S^0\ddot{I}{€}^{+}$

Belle Collaboration, H. K. Moon, E. Won +205

We search for $CP$ violation by measuring a $T$-odd asymmetry in the Cabibbo-suppressed $D^{+}\to K^{+}{K}_S^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decay, and in the Cabibbo-favored $D^{+}_{s}\…

Search for a dark leptophilic scalar produced in association with $\ddot{I}{„}^{+}\ddot{I}{„}^{-}$ pair in $e^{+}{e}^{-}$ annihilation at center-of-mass energies near 10.58 GeV

Belle Collaboration, D. Biswas, Sw. Banerjee +177

A dark leptophilic scalar $(\ddot{I}{•}_L)$ is a hypothetical particle that couples only to leptons rather than quarks. We report on a search for $\ddot{I}{•}_L$ in the $e^+e^- \to τ^+ τ^- ϕ_L, ~…

Measurement of the $B^{+}/B^0$ production ratio in $e^{+}{e}^{-}$ collisions at the $\hat{I}\yen (4S)$ resonance using $B\to J/\ddot{I}ˆ(\ell \ell )K$ decays at Belle

Belle Collaboration, S. Choudhury, S. Sandilya +197

We measure the ratio of branching fractions for the $\hat{I}\yen (4S)$ decays to $B^{+}{B}^{-}$ and $B^0\bar{B}{}^0$ using $B^{+}\to J/\ddot{I}ˆ(\ell \ell )K^{+}$ and $B^0 \rightarrow J/ψ(\ell\ell)…

Search for Pcs(4459) and Pcs(4338) in Upsilon(1S,2S) inclusive decays at Belle

I. Adachi, L. Aggarwal, H. Ahmed +402

Using data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we search f…

Search for baryon and lepton number violating decays $\mathbf{D}\to \mathbf{p}\mathbf{\ell }$

Belle Collaboration, S. Maity, R. Garg +159

We search for the baryon and lepton number violating charm decays, $D\to p\ell$, where $D$ is either a $D^0$ or a ${\overline{D}}^0$ and $\ell$ is a muon or an electron, usi…

Search for Baryon-Number-Violating Processes in $B^{-}$ Decays to the $\bar{\hat{I}}{ž}_c^0\bar{\hat{I}}{›}_c^{-}$ Final State

Belle Collaboration, T. Gu, V. Savinov +161

We report the results of the first search for $B^{-}$ decays to the $\bar{\hat{I}}{ž}_c^0\bar{\hat{I}}{›}_c^{-}$ final state using 711~$\mathrm{f}{\mathrm{b}}^{-1}$ of data collected at the $\hat{I}\yen (4S)$ resonance…

Novel method for the identification of the production flavor of neutral charmed mesons

Belle II Collaboration, I. Adachi, L. Aggarwal +396

We propose a new algorithm for the identification of the production flavor of neutral $D$ mesons in the Belle II experiment. The algorithm exploits the correlation between the flav…

Measurement of branching fractions and $CP$ asymmetries for $D_s^{+}\to K^{+}(\hat{I}\cdot ,\ddot{I}{€}^0)$ and $D_s^{+}\to \ddot{I}{€}^{+}(\hat{I}\cdot ,\ddot{I}{€}^0)$ decays at Belle

Belle Collaboration, Y. Guan, A. J. Schwartz +200

We report measurements of the branching fractions and $CP$ asymmetries for $D_s^{+}\to K^{+}\hat{I}\cdot$, $D_s^{+}\to K^{+}\ddot{I}{€}^0$, and $D_s^{+}\to \ddot{I}{€}^{+}\hat{I}\cdot$ de…

Measurement of branching fractions and direct $CP$ asymmetries for $B\to K\ddot{I}€$ and $B\to \ddot{I}€\ddot{I}€$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +435

We report measurements of the branching fractions and direct $CP$ asymmetries of the decays $B^0\to K^{+}\ddot{I}{€}^{-}$, $B^{+}\to K^{+}\ddot{I}{€}^0$, $B^{+}\to K^0\ddot{I}{€}^{+}$, and $B^0\to K^0\ddot{I}{€}^0$,…

Search for the decay $B^0\to K^{\ast 0}\ddot{I}{„}^{+}\ddot{I}{„}^{-}$ at the Belle experiment

Belle Collaboration, T. V. Dong, T. Luo +193

This letter presents a search for the rare flavor-changing neutral current process $B^0\to K^{\ast 0}\ddot{I}{„}^{+}\ddot{I}{„}^{-}$ using data taken with the Belle detector at the KEKB as…

Study of $e^{+}{e}^{-}\to \hat{I}{\pounds }^0\overline{\hat{I}}\pounds {}^0$ and $\hat{I}{\pounds }^{+}\overline{\hat{I}}\pounds {}^{-}$ by Initial State Radiation Method at Belle

Belle Collaboration, G. Gong, L. K. Li +195

The processes $e^{+}{e}^{-}\to \hat{I}{\pounds }^0\overline{\hat{I}}\pounds {}^0$ and $e^{+}{e}^{-}\to \hat{I}{\pounds }^{+}\overline{\hat{I}}\pounds {}^{-}$ are studied using initial-state-radiation events in a sample of 980 $\,\mbox{fb}…

Measurements of Partial Branching Fractions of Inclusive $B\to X_u{\ell }^{+}\hat{I}{½}_{\ell }$ Decays with Hadronic Tagging

Belle Collaboration, L. Cao, W. Sutcliffe +236

We present measurements of partial branching fractions of inclusive semileptonic $B\to X_u{\ell }^{+}\hat{I}{½}_{\ell }$ decays using the full Belle data set of 711 fb${}^{-1}$ of integrat…

Observation of charmed strange meson pair production in $\hat{I}\yen (2S)$ decays and in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=10.52\mathrm{GeV}$

Belle Collaboration, B. S. Gao, W. J. Zhu +165

We observe the process $\hat{I}\yen (2S)\to D_s^{(\ast )+}{D}_{sJ}^{-}$ and continuum production $e^{+}{e}^{-}\to D_s^{(\ast )+}{D}_{sJ}^{-}$ at $\sqrt{s}=10.52$ GeV (and their charge conjugates) using th…

Measurement of Differential Branching Fractions of Inclusive $B\to X_u{\ell }^{+}\hat{I}{½}_{\ell }$ Decays

Belle Collaboration, L. Cao, W. Sutcliffe +198

The first measurements of differential branching fractions of inclusive semileptonic $B\to X_u{\ell }^{+}\hat{I}{½}_{\ell }$ decays are performed using the full Belle data set of 711 f…

First Simultaneous Determination of Inclusive and Exclusive $\left|V_{ub}\right|$

Belle Collaboration, L. Cao, F. Bernlochner +211

The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element $V_{ub}$ using inclusive and exclusive decays is performed with the full…

Measurement of $B\to K{}^{\ast }(892){\hat{I}}^3$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +451

We present measurements of $B\to K{}^{\ast }(892){\hat{I}}^3$ decays using $365{\mathrm{fb}}^{-1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energ…

Search for the double-charmonium state with $\hat{I}{\cdot }_{c}J/\ddot{I}ˆ$ at Belle

Belle Collaboration, J. H. Yin, Y. B. Li +180

We measure the cross section of $e^{+}{e}^{-}\to \hat{I}{\cdot }_{c}J/\ddot{I}ˆ$ at the $\hat{I}\yen (nS)(n=1$ -- $5)$ on-resonance and 10.52 GeV off-resonance energy points using the full data sample collecte…

Measurement of branching fractions and search for $CP$ violation in $D^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\hat{I}\cdot$, $D^0\to K^{+}{K}^{-}\hat{I}\cdot$, and $D^0\to \ddot{I}•\hat{I}\cdot$ at Belle

Belle Collaboration, L. K. Li, A. J. Schwartz +187

We measure the branching fractions and $CP$ asymmetries for the singly Cabibbo-suppressed decays $D^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\hat{I}\cdot$, $D^0\to K^{+}{K}^{-}\hat{I}\cdot$, and $D^0\to \ddot{I}•\hat{I}\cdot$, using 980 fb…

Measurement of the $\ddot{I}„$-lepton mass with the Belle~II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +418

We present a measurement of the $\ddot{I}„$-lepton mass using a sample of about 175 million $e^{+}{e}^{-}\to \ddot{I}{„}^{+}\ddot{I}{„}^{-}$ events collected with the Belle II detector at the SuperKEKB $e^{+}{e}^{-}$ col…

Search for $CP$ violation and measurement of branching fractions and decay asymmetry parameters for $\hat{I}{›}_c^{+}\to \hat{I}›h^{+}$ and $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{h}^{+}$ ($h=K,\ddot{I}€$)

Belle Collaboration, L. K. Li, W. Shan +187

We report a study of $\hat{I}{›}_c^{+}\to \hat{I}›h^{+}$ and $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{h}^{+}$ ($h=K,\ddot{I}€$) decays based on a data sample of 980~${\mathrm{fb}}^{-1}$ collected with the Belle detector at the KEKB…

Measurement of the Masses and Widths of the $\hat{I}{\pounds }_c(2455{)}^{+}$ and $\hat{I}{\pounds }_c(2520{)}^{+}$ Baryons

Belle Collaboration, J. Yelton, I. Adachi +205

Using 980 ${\mathrm{fb}}^{-1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we report the measurements of the masses, and the f…

First search for the weak radiative decays $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{+}{\hat{I}}^3$ and $\hat{I}{ž}_c^0\to \hat{I}{ž}^0{\hat{I}}^3$

Belle Collaboration, Y. Li, C. P. Shen +187

We present the first search for the weak radiative decays $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{+}{\hat{I}}^3$ and $\hat{I}{ž}_c^0\to \hat{I}{ž}^0{\hat{I}}^3$ using a data sample of 980~fb${}^{-1}$ collected by the Belle detector operati…

Measurements of the branching fractions of $\hat{I}{ž}_c^0\to \hat{I}›K_S^0$, $\hat{I}{ž}_c^0\to \hat{I}{\pounds }^0{K}_S^0$, and $\hat{I}{ž}_c^0\to \hat{I}{\pounds }^{+}{K}^{-}$ decays at Belle

Belle collaboration, Y. Li, J. X. Cui +213

Using the entire data sample of $980{\mathrm{fb}}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present measurements of the branching f…

Search for $CP$ violation in $D_{(s)}^{+}\to K_S^0{K}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}$ decays using triple and quadruple products

Belle, Belle II Collaborations, : +366

We perform the first search for $CP$ violation in $D_{(s)}^{+}\to K_S^0{K}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}$ decays. We use a combined data set from the Belle and Belle II experiments, which…

Evidence of a new excited charmed baryon decaying to $\hat{I}{\pounds }_c(2455{)}^{0,++}\ddot{I}{€}^{\pm }$

Belle Collaboration, Y. B. Li, C. P. Shen +194

We present the study of ${\bar{B}}^0\to \hat{I}{\pounds }_c(2455{)}^{0,++}\ddot{I}{€}^{\pm }\bar{p}$ decays based on $772\times 10^6$ $B\bar{B}$ events collected with the Belle detector at the KEKB as…

Search for the Decay $B_s^0\to \hat{I}{\cdot }^{\prime }\hat{I}\cdot$

Belle Collaboration, A. Abdesselam, I. Adachi +459

In the Standard Model (SM) charmless hadronic decays $B_s^0\to \hat{I}{\cdot }^{\prime }\hat{I}\cdot$ proceed via tree-level $b\to u$ and penguin $b\to s$ transitions. Penguin transitions are sens…

A test of lepton flavor universality with a measurement of $R(D^{\ast })$ using hadronic $B$ tagging at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +434

The ratio of branching fractions $R(D^{\ast })=\mathcal{B}(\overline{B}\to D^{\ast }\ddot{I}{„}^{-}\overline{\hat{I}}{½}_{\ddot{I}}„)$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overlineν_{\…

Search for $X(3872)\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$ at Belle