M. Merola

Search for the decay $B_{s}^{0} \to I ¨ ^{0} I ¨ ^{0}$ at Belle

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

We report the results of the first search for the decay $B_{s}^{0} \to I ¨ ^{0} I ¨ ^{0}$ using $121.4 f b^{- 1}$ of data collected at the $I^¥ (5 S)$ resonance with the Belle detecto…

Charged-hadron identification at Belle II

Belle II Collaboration, I. Adachi, H. Ahmed +408

The Belle II experiment's ability to identify particles critically affects the sensitivity of its measurements. We describe Belle II's algorithms for identifying charged particles…

Measurements of isospin asymmetry and difference of direct $C P$ asymmetries in inclusive $B \to X_{s} I^^{3}$ decays

S. Watanuki, A. Ishikawa, I. Adachi +174

We report measurements of isospin asymmetry $I^_{0 -}$ and difference of direct $C P$ asymmetries $I^ A_{C P}$ between charged and neutral $B \to X_{s} I^^{3}$ decays. This analysis is based…

hep-ex2017

Search for $B^{-} \to I^¼^{-} I^ˉ ½_{I^} ¼$ Decays at the Belle Experiment

Belle Collaboration, A. Sibidanov, K. E. Varvell +184

We report the result of a search for the decay $B^{-} \to I^¼^{-} I^ˉ ½_{I^} ¼$ . The signal events are selected based on the presence of a high momentum muon and the topology of the rest…

Tests of light-lepton universality in angular asymmetries of $B^{0} \to D^{*-} ℓ I^½$ 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…

Production cross sections of hyperons and charmed baryons from $e^{+} e^{-}$ annihilation near $s = 10.52$ ~GeV

Belle Collaboration, M. Niiyama, M. Sumihama +167

We measure the inclusive production cross sections of hyperons and charmed baryons from $e^{+} e^{-}$ annihilation using a 800 fb $^{- 1}$ data sample taken near the $I^¥ (4 S)$ resonance wi…

Search for lepton-flavor-violating $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 $I ¨ $ lepton decays into a light charged lepton ( $ℓ$ = $e^{\pm}$ or $Î¼^{…

Measurement of the $C P$ asymmetry in $D^{0} \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ decays at Belle II

Belle II Collaboration, M. Abumusabh, I. Adachi +400

We measure the time- and phase-space-integrated $C P$ asymmetry $A_{C P}$ in $D^{0} \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ decays reconstructed in $e^{+} e^{-} \to c c ˉ$ events collected by the Belle II experim…

Study of $B^{+} \to p n I ¨ ^{0}$

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

We search for the tree-diagram dominated process $B^{+} \to p n I ¨ ^{0}$ , using a data sample of $772 \times 1 0^{6} B B$ pairs collected at the $I^¥ (4 S)$ resona…

physics.ins-det2016

Performance of Resistive Plate Chambers installed during the first long shutdown of the CMS experiment

M. Shopova, A. Aleksandrov, R. Hadjiiska +93

The CMS experiment, located at the CERN Large Hadron Collider, has a redundant muon system composed by three different detector technologies: Cathode Strip Chambers (in the forward…

Measurement of the branching fraction of $I^_{c}^{+} \to p I ¨ $ decay at Belle

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

Using 980.6 $f b^{- 1}$ 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 $I^_{c}^{0} \to I^_{c}^{+} I ¨ ^{-}$ 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…

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

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

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

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

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

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

Search for the lepton-flavor-violating $I ¨ ^{-} \to e^{\mp} ℓ^{\pm} ℓ^{\mp}$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +447

We present the result of a search for the charged-lepton-flavor violating decays $I ¨ ^{-} \to e^{\mp} ℓ^{\pm} ℓ^{-}$ , where $ℓ$ is a muon or an electron, using a data sampl…

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

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 $e^{+} e^{-} \to I^¥ (1S, 2S) I^\cdot$ and $e^{+} e^{-} \to I^¥ (1S) I^\cdot^{'}$ at $s = 10.866$ GeV with the Belle detector

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

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

New graph-neural-network flavor tagger for Belle II and measurement of $sin 2 I ¨ _{1}$ in $B^{0} \to J / I ¨ K_{S}^{0}$ decays

Belle II Collaboration, I. Adachi, L. Aggarwal +413

We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $I^¥ (4 S)$ decays. It improves previous algorithms by usi…

Measurements of $q^{2}$ Moments of Inclusive $B \to X_{c} ℓ^{+} I^½_{ℓ}$ 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 $B \to X_{c} ℓ^{+} I^½_{ℓ}$ decays using the ful…

A search for feebly-interacting particles in $B$ decays with missing energy at Belle

Belle, Belle II Collaborations, : +406

We present a search for an invisible hidden-sector particle $X_{inv}$ , produced in $B^{0} \to D ˉ^{0} X_{inv}$ and $B^{\pm} \to h X_{inv}$ decays, where $h = I ¨ ^{\pm}$ ,…

Measurement of Branching Fractions of Hadronic Decays of the $I^c ◯_{c}^{0}$ Baryon

Belle Collaboration, J. Yelton, I. Adachi +186

Using a data sample of 980 $fb^{- 1}$ of $e^{+} e^{-}$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we report the resu…

$I ¨ $ lepton mass measurement at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +539

The reconstruction of tau-pair production, $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-}$ , from the subsequent 3-prong ( $I ¨ ^{+} \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{+} I^ˉ ½_{I ¨} $ ) and 1-prong ($Ï^{-} \to…

Search for charmed baryons in the $I^_{c}^{+} I^\cdot$ system and measurement of the branching fractions of $I^_{c} (2880)^{+}$ and $I^_{c} (2940)^{+}$ decaying to $I^_{c}^{+} I^\cdot$ and $p D^{0}$ relative to $I^£_{c} (2455) I ¨ $

Belle Collaboration, S. X. Li, C. P. Shen +125

We search for excited charmed baryons in the $I^_{c}^{+} I^\cdot$ system using a data sample corresponding to an integrated luminosity of 980 $f b^{- 1}$ . The data were collected by the Be…

Search for lepton-flavor-violating tau-lepton decays to $ℓ I^^{3}$ 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 $Ï^{\pm}\rightarrow…

Search for the $B \to Y (4260) K, Y (4260) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays

Belle collaboration, R. Garg, V. Bhardwaj +172

We report the results of a search for the $B \to Y (4260) K, Y (4260) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays. This study is based on a data sample corresponding to an integrated luminosity of 711~…

Measurement of the CKM Matrix Element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} I^½_{ℓ}$ at Belle

E. Waheed, P. Urquijo, I. Adachi +184

We present a new measurement of the CKM matrix element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} I^½_{ℓ}$ decays, reconstructed with the full Belle data set of $711 f b^{- 1}$ …

Search for charged-lepton flavor violation in $I^¥ (2 S) \to ℓ^{\mp} I ¨ ^{\pm}$ ( $ℓ = e, I^¼$ ) decays at Belle

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

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

Search for the $I^\cdot_{c 2} (1 D)$ in $e^{+} e^{-} \to I^^{3} I^\cdot_{c 2} (1 D)$ at $s$ near 10.6 GeV at Belle

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

For the first time we search for the $I^\cdot_{c 2} (1 D)$ in $e^{+} e^{-} \to I^^{3} I^\cdot_{c 2} (1 D)$ at $s$ = 10.52, 10.58, and 10.867 GeV with data samples of 89.5 fb $^{- 1}$ , 711 fb $^{- 1}$ , and…

Observation of $I^_{c} (2930)^{0}$ and updated measurement of $B^{-} \to K^{-} I^_{c}^{+} I^ˉ _{c}^{-}$ at Belle

Belle Collaboration, Y. B. Li, C. P. Shen +178

We report the first observation of the $I^_{c} (2930)^{0}$ charmed-strange baryon with a significance greater than 5 $I ¨ $ . The $I^_{c} (2930)^{0}$ is found in its decay to $K^{-} I^_{c}^{+}$ …

Charmless $B$ decay reconstruction in 2019 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +533

We report on the reconstruction of various charmless $B$ decays from electron-positron collisions at the energy corresponding to the $I^¥ (4 S)$ resonance collected with the Belle II…

Measurement of $B$ ( $B_{s} \to D_{s} X$ ) with $B_{s}$ Semileptonic Tagging

B. Wang, K. Kinoshita, H. Aihara +153

We report the first direct measurement of the inclusive branching fraction $B (B_{s} \to D_{s} X)$ via $B_{s}$ tagging in $e^{+} e^{-} \to I^¥$ (5S) events. Tagging is accomplis…

Measurement of the branching fraction and $CP$ asymmetry of $B^{0} \to I ¨ ^{0} I ¨ ^{0}$ decays using $198 \times 1 0^{6}$ $B B$ pairs in Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +425

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

An improved search for the electric dipole moment of the $I ¨ $ lepton

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

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

Measurement of the charm-mixing parameter $y_{C P}$ in $D^{0} \to K_{S}^{0} I ¨ $ decays at Belle

Belle Collaboration, M. Nayak, D. Cinabro +179

We report the first measurement of the charm-mixing parameter $y_{C P}$ in $D^{0}$ decays to the $C P$ -odd final state $K_{S}^{0} I ¨ $ . The study uses the full Belle $e^{+} e^{-}$ annihil…

Rediscovery of $B \to I ¨ K^{()}$ decays and measurement of the longitudinal polarization fraction $f_{L}$ in $B \to I ¨ K^{}$ decays using the Summer 2020 Belle II dataset

F. AbudinÃ©n, I. Adachi, R. Adak +538

We utilize a sample of 34.6 fb $^{- 1}$ , collected by the Belle II experiment at the SuperKEKB asymmetric energy $e^{+} e^{-}$ collider, to search for the $B^{+} \to I ¨ K^{+}$ , $B^+ \to ÏK^{*…

Determination of $∣ V_{u b} ∣$ from simultaneous measurements of untagged $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ and $B^{+} \to I ¨ ^{0} ℓ^{+} I^½_{ℓ}$ decays

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

We present a measurement of $∣ V_{u b} ∣$ from a simultaneous study of the charmless semileptonic decays $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ and $B^{+} \to I ¨ ^{0} ℓ^{+} I^½_{ℓ}$ , where $\ell =…

Observation of $I^c ◯ (2012)^{-} \to I^ (1530) K ˉ$ and measurement of the effective couplings of $I^c ◯ (2012)^{-}$ to $I^ (1530) K ˉ$ and $I^ K ˉ$

Belle Collaboration, S. Jia, C. P. Shen +117

Using $I^¥ (1 S)$ , $I^¥ (2 S)$ , and $I^¥ (3 S)$ data collected by the Belle detector, we discover a new three-body decay, $I^c ◯ (2012)^{-} \to I^ (1530) K ˉ \to I^ I ¨ K ˉ$ , with a significance of…

Measurement of $C P$ asymmetries in $B^{0} \to I^\cdot^{'} K_{s}^{0}$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +399

We describe a measurement of charge-parity ( $C P$ ) violation asymmetries in $B^{0} \to I^\cdot^{'} K_{S}^{0}$ decays using Belle II data. We consider $I^\cdot^{'} \to I^\cdot (\to I^^{3} I^^{3}) I ¨ ^{+} I ¨ ^{-}$ and $Î·'\toÏ(\toÏ^…

Measurement of the Branching Fraction of the Decay $B^{+} \to I ¨ ^{+} I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ in Fully Reconstructed Events at Belle

The Belle Collaboration, C. BeleÃ±o, A. Frey +160

We present an analysis of the exclusive $B^{+} \to I ¨ ^{+} I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ decay, where $ℓ$ represents an electron or a muon, with the assumption of charge-conjugation symm…

First evidence of $X (3872) \to I ¨ ^{0} I ¨ _{c 0} (1 P)$ and search for $X (3915) \to I ¨ ^{0} I ¨ _{c 1} (1 P)$

Belle, Belle II Collaborations, : +412

We search for the pionic transitions $X (3872) \to I ¨ ^{0} I ¨ _{c J} (1 P)$ $(J = 0, 1, 2)$ and $X (3915) \to I ¨ ^{0} I ¨ _{c 1}$ in $B^{+} \to I ¨ ^{0} I ¨ _{c J} K^{+}$ decays using the Belle and Belle~II data sam…

Search for lepton flavor-violating decay modes $B^{0} \to K_{S}^{0} I ¨ ^{\pm} ℓ^{\mp} (ℓ = I^¼, e)$ 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 $B^{0} \to K_{S}^{0} I ¨ ^{\pm} ℓ^{\mp} (ℓ = I^¼, e)$ using the 711 fb $^{- 1}$ and 365 fb $^{- 1}$ data samples…

Measurement of the time-integrated mixing probability $I ¨ _{d}$ with a semileptonic double-tagging strategy and $34.6 fb^{- 1}$ of Belle II collision data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +550

We present the first measurement of the time-integrated mixing probability $I ¨ _{d}$ using Belle II data collected at a center-of-mass (CM) energy of 10.58 GeV, corresponding to the m…

Observation of the radiative decay $D_{s} (2317)^{+} \to D_{s}^{*} I^^{3}$

Belle II Collaboration, M. Abumusabh, I. Adachi +367

We observe the radiative decay $D_{s 0}^{*} (2317)^{+} \to D_{s}^{*+} I^^{3}$ for the first time, with a significance exceeding $10$ standard deviations. The signal is found in the conti…

Search for an invisibly decaying $Z^{'}$ boson at Belle II in $e^{+} e^{-} \to I^¼^{+} I^¼^{-} (e^{\pm} I^¼^{\mp})$ plus missing energy final states

Belle II Collaboration, I. Adachi, P. Ahlburg +358

Theories beyond the standard model often predict the existence of an additional neutral boson, the $Z^{'}$ . Using data collected by the Belle II experiment during 2018 at the…

Precise measurement of the $D_{s}^{+}$ lifetime at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +359

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…

Measurements of branching fractions and direct CP asymmetries in $B^{0} \to K^{+} I ¨ ^{-}$ , $B^{+} \to K_{S}^{0} I ¨ ^{+}$ and $B^{0} \to I ¨ ^{+} I ¨ ^{-}$ using 2019 and 2020 data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +549

We report updated measurements of branching fractions ( $B$ ) and CP-violating charge asymmetries ( $A_{CP}$ ) for charmless $B$ decays at Belle II, which opera…

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

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

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

Measurement of the $D^{0} \to K^{-} I ¨ ^{+} e^{+} e^{-}$ branching fraction and search for $D^{0} \to I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ 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 $D^{0} \to K^{+} K^{-} e^{+} e^{-}$ , $I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ , and $K^{-} I ¨ ^{+} e^{+} e^{-}$ using a 942 fb $^{- 1}$ data se…

Study of $I ¨ _{b J} (2 P) \to I ¨ I^¥ (1 S)$ at Belle

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

We report a study of the hadronic transitions $I ¨ _{b J} (2 P) \to I ¨ I^¥ (1 S)$ , with $I ¨ \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ , using $28.2 \times 1 0^{6} I^¥ (3 S)$ mesons recorded by the Belle detector. We pres…

Search for an invisible $Z^{'}$ in a final state with two muons and missing energy at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +385

The $L_{I^} ¼ - L_{I ¨} $ extension of the standard model predicts the existence of a lepton-flavor-universality-violating $Z^{'}$ boson that couples only to the heavier lepton families…

Study of $I^¥ (10753)$ decays to $I ¨ ^{+} I ¨ ^{-} I^¥ (n S)$ final states at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +393

We present an analysis of the process $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-} I^¥ (n S)$ (where $n$ = 1, 2, or 3) reconstructed in $19.6$ $f b^{- 1}$ of Belle II data during a special run of t…

Measurement of $C P$ asymmetries in $B^{0} \to I ¨ K_{S}^{0}$ decays with Belle II

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

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

Search for a dark photon and an invisible dark Higgs boson in $I^¼^{+} I^¼^{-}$ and missing energy final states with the Belle II experiment

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +357

The dark photon $A^{'}$ and the dark Higgs boson $h^{'}$ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of $A^\pri…

Measurement of the semileptonic $B ˉ^{0} \to D^{*+} ℓ^{-} I^½_{ℓ}$ branching fraction with fully reconstructed $B$ meson decays and 34.6 fb $^{- 1}$ of Belle II data

Belle II Collaboration, F. Abudinen, I. Adachi +540

We present a first measurement of the $B^{0} ˉ \to D^{*+} ℓ^{-} I^½_{ℓ}$ branching fraction using fully reconstructed $B$ meson decays employing the Full Event Int…

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

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +575

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

Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment

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

Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limit…

Measurement of the branching fraction of the decay $B^{-} \to D^{0} I ¨ (770)^{-}$ at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +389

We measure the branching fraction of the decay $B^{-} \to D^{0} I ¨ (770)^{-}$ using data collected with the Belle II detector. The data contain 387 million $B B$ pairs produced…

Measurements of the branching fractions for $B \to K^{*} I^^{3}$ decays at Belle II

F. AbudinÃ©n, I. Adachi, R. Adak +565

This paper reports a study of $B \to K^{*} I^^{3}$ decays using $62.8 \pm 0.6$ fb $^{- 1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+} e^{-}$ asym…

Rediscovery of $B^{0} \to J / I ¨ K_{L}^{0}$ at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +545

We present preliminary results on the reconstruction of the $B^{0} \to J / I ¨ K_{L}^{0}$ decay, where $J / I ¨ \to I^¼^{+} I^¼^{-}$ or $…

Evidence of $h_{b} (2P) \to I^¥ (1S) I^\cdot$ decay and search for $h_{b} (1P,2P) \to I^¥ (1S) I ¨ ^{0}$ with the Belle detector

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

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

Study of $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-} I^¥ (1 D)$ at Belle II

Belle II Collaboration, M. Abumusabh, I. Adachi +404

The bottomonium spectrum, consisting of bound states of a $b$ quark and an anti- $b$ quark, provides an excellent laboratory for probing quantum chromodynamics in the non-perturbati…

Study of Exclusive $B \to I ¨ e^{+} I^½_{e}$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb $^{- 1}$ of Belle II Data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +590

We present a reconstruction of the semileptonic decays $B^{0} \to I ¨ ^{-} e^{+} I^½_{e}$ and $B^{+} \to I ¨ ^{0} e^{+} I^½_{e}$ in a sample corresponding to 189.3 fb $^{- 1}$ of Belle II data, using even…

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 $I ¨ ^{-} \to p e^{+} e^{-}$ , $p e^{-} e^{-}$ , $p e^{+} I^¼^{-}$ , $p e^{-} I^¼^{+}$ , $\overline{p…

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

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

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

Search for rare decays $B^{+} \to D_{s}^{() +} I^\cdot$ , $D_{s}^{() +} K ˉ^{0}$ , $D^{+} I^\cdot$ , and $D^{+} K^{0}$

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

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

Search for $C P$ violation in $D_{(s)}^{+} \to K^{+} K_{S}^{0} h^{+} h^{-}$ $(h = K, I ¨ )$ decays and observation of the Cabibbo-suppressed decay $D_{s}^{+} \to K^{+} K^{-} K_{S}^{0} I ¨ ^{+}$

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

We search for $C P$ violation by measuring a $T$ -odd asymmetry in the Cabibbo-suppressed $D^{+} \to K^{+} K_{S}^{0} I ¨ ^{+} I ¨ ^{-}$ decay, and in the Cabibbo-favored $D^{+}_{s}\…

Measurement of the $B^{+} / B^{0}$ production ratio in $e^{+} e^{-}$ collisions at the $I^¥ (4 S)$ resonance using $B \to J / I ¨ (ℓℓ) K$ decays at Belle

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

We measure the ratio of branching fractions for the $I^¥ (4 S)$ decays to $B^{+} B^{-}$ and $B^{0} B ˉ^{0}$ using $B^{+} \to J / I ¨ (ℓℓ) K^{+}$ and $B^0 \rightarrow J/Ï(\ell\ell)…

Observation of the radiative decays of $I^¥ (1 S)$ to $I ¨ _{c 1}$

P. Katrenko, I. Adachi, H. Aihara +166

We report the first observation of the radiative decay of the $I^¥ (1 S)$ into a charmonium state. The statistical significance of the observed signal of $I^¥ (1 S) \to I^^{3} I ¨ _{c 1}$ is 6.3…

Measurement of branching fractions and $C P$ asymmetries for $D_{s}^{+} \to K^{+} (I^\cdot, I ¨ ^{0})$ and $D_{s}^{+} \to I ¨ ^{+} (I^\cdot, I ¨ ^{0})$ decays at Belle

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

We report measurements of the branching fractions and $C P$ asymmetries for $D_{s}^{+} \to K^{+} I^\cdot$ , $D_{s}^{+} \to K^{+} I ¨ ^{0}$ , and $D_{s}^{+} \to I ¨ ^{+} I^\cdot$ de…

Searches for charged-lepton-flavor violation in $I ¨ _{b J} (1 P)$ decays

Belle, Belle II Collaborations, : +415

We report the first searches for charged-lepton-flavor violation in decays of $I ¨ _{b J} (1 P)$ ( $J = 0, 1,$ and $2$ ) to a pair of charged leptons using 158 million $I^¥ (2 S)$ decays colle…

Search for the decay $B^{0} \to K^{* 0} I ¨ ^{+} I ¨ ^{-}$ 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 $B^{0} \to K^{* 0} I ¨ ^{+} I ¨ ^{-}$ using data taken with the Belle detector at the KEKB as…

Study of $B^{+} \to I^¼^{+} I^½_{I^} ¼$ decays at Belle and Belle II

Belle, Belle II Collaborations, : +412

We report a measurement of the branching fraction for the leptonic decay $B^{+} \to I^¼^{+} I^½_{I^} ¼$ . This work presents the first $B^{+} \to I^¼^{+} I^½_{I^} ¼$ result using Belle~II data, an updated Be…

Precise measurement of the $D^{0}$ and $D^{+}$ lifetimes at Belle II

We report a measurement of the $D^{0}$ and $D^{+}$ lifetimes using $D^{0} \to K^{-} I ¨ ^{+}$ and $D^{+} \to K^{-} I ¨ ^{+} I ¨ ^{+}$ decays reconstructed in $e^{+} e^{-} \to c c ˉ$ data recorded by the Belle II…

Measurements of Partial Branching Fractions of Inclusive $B \to X_{u} ℓ^{+} I^½_{ℓ}$ Decays with Hadronic Tagging

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

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

Evidence for a vector charmonium-like state in $e^{+} e^{-} \to D_{s}^{+} D_{s 2}^{*} (2573)^{-} + c . c .$

Belle Collaboration, S. Jia, C. P. Shen +173

We report the measurement of $e^{+} e^{-} \to D_{s}^{+} D_{s 2}^{*} (2573)^{-} + c . c .$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb $^{- 1}$ collected with t…

Measurement of the time-integrated $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays using opposite-side flavor tagging at Belle and Belle II

Belle, Belle II Collaborations, : +378

We measure the time-integrated $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays reconstructed in $e^{+} e^{-} \to c c$ events collected by the Belle and Belle II exp…

Measurement of Differential Branching Fractions of Inclusive $B \to X_{u} ℓ^{+} I^½_{ℓ}$ Decays

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

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

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

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

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

Measurement of branching fractions and search for $C P$ violation in $D^{0} \to I ¨ ^{+} I ¨ ^{-} I^\cdot$ , $D^{0} \to K^{+} K^{-} I^\cdot$ , and $D^{0} \to I ¨ I^\cdot$ at Belle

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

We measure the branching fractions and $C P$ asymmetries for the singly Cabibbo-suppressed decays $D^{0} \to I ¨ ^{+} I ¨ ^{-} I^\cdot$ , $D^{0} \to K^{+} K^{-} I^\cdot$ , and $D^{0} \to I ¨ I^\cdot$ , using 980 fb…

Search for the lepton flavour violating decays $B^{+} \to K^{+} I ¨ ^{\pm} ℓ^{\mp}$ ( $ℓ = e, I^¼$ ) at Belle

Belle Collaboration, S. Watanuki, G. de Marino +176

We present a search for the lepton-flavour-violating decays $B^{+} \to K^{+} I ¨ ^{\pm} ℓ^{\mp}$ , with $ℓ = (e, I^¼)$ , using the full data sample of $772 \times 1 0^{6}$ $B B$ pa…

Measurement of the $I ¨ $ -lepton mass with the Belle~II experiment

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

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

hep-ex2017

Angular analysis of the $e^{+} e^{-} \to D^{() \pm} D^{\mp}$ process near the open charm threshold using initial-state radiation

Belle Collaboration, V. Zhukova, H. Aihara +149

We report a new measurement of the exclusive $e^{+} e^{-} \to D^{(*) \pm} D^{*\mp}$ cross sections as a function of the center-of-mass energy from the $D^{(*) \pm} D^{*\mp}$ threshold…

Measurements of the branching fractions of $I^_{c}^{0} \to I^ K_{S}^{0}$ , $I^_{c}^{0} \to I^£^{0} K_{S}^{0}$ , and $I^_{c}^{0} \to I^£^{+} K^{-}$ decays at Belle

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

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

Test of lepton flavor universality and search for lepton flavor violation in $B \to K ℓℓ$ decays

S. Choudhury, S. Sandilya, K. Trabelsi +220

We present measurements of the branching fractions for the decays $B \to K I^¼^{+} I^¼^{-}$ and $B \to K e^{+} e^{-}$ , and their ratio ( $R_{K}$ ), using a data sample of 711 $f b^{- 1}$ tha…

Observation of Excited $I^c ◯_{c}$ Charmed Baryons in $e^{+} e^{-}$ Collisions

Belle Collaboration, J. Yelton, I. Adachi +177

Using the entire Belle data sample of 980 $fb^{- 1}$ of $e^{+} e^{-}$ collisions, we present the results of a study of excited $I^c ◯_{c}$ charmed baryons in the decay mode $I^_{c}^{+} K^{-}$ .…

Dalitz analysis of $D^{0} \to K^{-} I ¨ ^{+} I^\cdot$ decays at Belle

Belle Collaboration, Y. Q. Chen, L. K. Li +177

We present the results of the first Dalitz plot analysis of the decay $D^{0} \to K^{-} I ¨ ^{+} I^\cdot$ . The analysis is performed on a data set corresponding to an integrated luminosity of…

Search for $C P$ violation in $D_{(s)}^{+} \to K_{S}^{0} K^{-} I ¨ ^{+} I ¨ ^{+}$ decays using triple and quadruple products

Belle, Belle II Collaborations, : +366

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

Evidence of a new excited charmed baryon decaying to $I^£_{c} (2455)^{0, ++} I ¨ ^{\pm}$

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

We present the study of $B ˉ^{0} \to I^£_{c} (2455)^{0, ++} I ¨ ^{\pm} p ˉ$ decays based on $772 \times 1 0^{6}$ $B B ˉ$ events collected with the Belle detector at the KEKB as…

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

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

The ratio of branching fractions $R (D^{*}) = B (B \to D^{*} I ¨ ^{-} I^½_{I ¨} )$ /$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overlineÎ½_{\…

Angular analysis of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ decays reconstructed in 2019-2020 Belle II data

We report on the first Belle II measurement of the branching fraction ( $B$ ) and longitudinal polarization fraction ( $f_{L}$ ) of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ decays. We reconstruct $B^…

hep-ex2017

Study of $K_{S}^{0}$ pair production in single-tag two-photon collisions

Belle Collaboration, M. Masuda, S. Uehara +185

We report a measurement of the cross section for $K_{S}^{0}$ pair production in single-tag two-photon collisions, $Î³^* Î³\to K^0_S K^0_S$, for $Q^{2}$ up to 30 GeV $^{2}$ , where $Q^{2}$ is t…

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

Belle Collaboration, J. H. Yin, E. Won +193

We present a search for the decay $X (3872) \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ in the $(772 \pm 11) \times 1 0^{6}$ $I^¥ (4 S) \to B B ˉ$ data sample collected at the Belle detector, where the $X (3872)$ is…

Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data

We report on measurements of branching fractions ( $B$ ) and CP-violating charge asymmetries ( $A_{CP}$ ) of multibody charmless $B$ decays reconstructed by the…

Observation of the decay $B^{0} \to J / I ¨ I ¨ $ at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +383

We measure the branching fraction of the decay $B^{0} \to J / I ¨ I ¨ $ using data collected with the Belle II detector at the SuperKEKB collider. The data contain $(387 \pm 6) \times 10^6…

Measurement of $B^{+} \to I ¨ ^{+} I^½_{I ¨} $ branching fraction with a hadronic tagging method at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +341

We present a measurement of the branching fraction of $B^{+} \to I ¨ ^{+} I^½_{I ¨} $ decays using $(387 \pm 6) \times 1 0^{6}$ $I^¥ (4 S)$ collected between 2019 and 2022 with the Belle II detector at t…

First evidence for $cos 2 I^^{2} > 0$ and resolution of the CKM Unitarity Triangle ambiguity by a time-dependent Dalitz plot analysis of $B^{0} \to D^{(*)} h^{0}$ with $D \to K_{S}^{0} I ¨ ^{+} I ¨ ^{-}$ decays

The BaBar, Belle Collaborations, : +422

We present first evidence that the cosine of the CP-violating weak phase $2 I^^{2}$ is positive, and hence exclude trigonometric multifold solutions of the CKM Unitarity Triangle using…

Search for $C P$ violation with kinematic asymmetries in the $D^{0} \to K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}$ decay

Belle Collaboration, J. B. Kim, E. Won +182

We search for $C P$ violation in the singly-Cabibbo-suppressed decay $D^{0} \to K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}$ using data corresponding to an integrated luminosity of $988\text{ }{\…

Measurement of eta_c(1S), eta_c(2S) and non-resonant eta' pi+ pi- production via two-photon collisions

The Belle Collaboration, Q. N. Xu, I. Adachi +176

We report the measurement of gamma gamma to eta_c(1S), eta_c(2S) to eta' pi+ pi- with eta' decays to gamma rho and eta pi+ pi- using 941 fb^{-1} of data collected with the Belle de…

Search for a heavy neutrino in $I ¨ $ decays at Belle

Belle Collaboration, D. Liventsev, I. Adachi +189

We report on a search for a heavy neutrino in the decays $I ¨ ^{-} \to I ¨ ^{-} I^½_{h}$ , $I^½_{h} \to I ¨ ^{\pm} ℓ - +$ , $ℓ = e, I^¼$ . The results are obtained using the full data sample collect…