Belle

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2019-06-25
18:02
[PUBDB-2019-02587] Journal Article
et al
Search for $X ( 3872 )$ and $X ( 3915 )$ decay into $χ_ {c 1} π ^0$ in $B$ decays at Belle
We report a search for X(3872) and X(3915) in B+→χc1π0K+ decays. We set an upper limit of B(B+→X(3872)K+)×B(X(3872)→χc1π0)<8.1×10−6 and B(B+→X(3915)K+)×B(X(3915)→χc1π0)<3.8×10−5 at 90% confidence level. [...]
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2019-06-25
17:54
[PUBDB-2019-02586] Journal Article
et al
Evidence for the decay $B ^0 → p \overline{p}π^ 0$
We report a search for the charmless baryonic decay B0→p¯pπ0 with a data sample corresponding to an integrated luminosity of 711  fb−1 containing (772±10)×106 B¯B pairs. The data were collected by the Belle experiment running on the Υ(4S) resonance at the KEKB e+e− collider [...]
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2019-06-25
17:33
[PUBDB-2019-02585] Journal Article
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Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive $e^ + e ^− $ annihilation at $ \sqrt= 10.58     GeV$
We report measurements of the production cross sections of charged pions, kaons, and protons as a function of fractional energy, the event-shape variable called thrust, and the transverse momentum with respect to the thrust axis. These measurements access the transverse momenta created in the fragmentation process, which are of critical importance to the understanding of any transverse-momentum-dependent distribution and fragmentation functions. [...]
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2019-06-25
16:53
[PUBDB-2019-02584] Journal Article
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First Measurements of Absolute Branching Fractions of the $ Ξ _{c}^ 0$ Baryon at Belle
We present the first measurements of absolute branching fractions of Ξ0c decays into Ξ−π+, ΛK−π+, and pK−K−π+ final states. The measurements are made using a dataset comprising (772±11)×106 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e− collider. [...]
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2019-06-25
16:36
[PUBDB-2019-02583] Journal Article
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Search for the rare decay of $B ^+ → ℓ ^+ ν ℓ γ$ with improved hadronic tagging
We present the result of the search for the rare B meson decay of B+→ℓ+νℓγ with ℓ=e,μ. For the search the full data set recorded by the Belle experiment of 711  fb−1 integrated luminosity near the Υ(4S) resonance is used [...]
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2019-06-25
16:28
[PUBDB-2019-02582] Journal Article
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Search for $C P$ violation with kinematic asymmetries in the $D^ 0 → K ^+ K ^− π^ + π^ −$ decay
We search for CP violation in the singly-Cabibbo-suppressed decay D0→K+K−π+π− using data corresponding to an integrated luminosity of 988  fb−1 collected by the Belle detector at the KEKB e+e− collider. We measure a set of five kinematically dependent CP asymmetries, of which four asymmetries are measured for the first time. [...]
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2019-06-25
16:12
[PUBDB-2019-02581] Journal Article
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Observation of $Ξ ( 1620 ) ^0$ and Evidence for $Ξ ( 1690 )^0$ in $ Ξ _{c}^{+} → Ξ ^{−} \pi^{+} \pi^ {+} $ Decays
We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ−π+ via Ξ+c→Ξ−π+π+ decays based on a 980  fb−1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. The mass and width are measured to be 1610.4±6.0(stat)+6.1−4.2 (syst)  MeV/c2 and 59.9±4.8(stat)+2.8−7.1(syst)  MeV, respectively. [...]
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2019-06-24
15:17
[PUBDB-2019-02573] Journal Article
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Measurement of time-dependent $C P$ violation in $B ^0 → K_ S ^0 π ^0 π^ 0$ decays
We report a measurement of time-dependent CP violation in B0→K0Sπ0π0 decays using a data sample of 772×106  B¯B pairs collected by the Belle experiment running at the Υ(4S) resonance at the KEKB e+e− collider. This decay proceeds mainly via a b→sd¯d “penguin” amplitude. [...]
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2019-06-24
14:11
[PUBDB-2019-02571] Journal Article
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Measurement of the branching fraction and time-dependent C P asymmetry for $B^ 0 → J / ψ π^ 0$ decays
We measure the branching fraction and time-dependent CP-violating asymmetry for B0→J/ψπ0 decays using a data sample of 711  fb−1 collected on the Υ(4S) resonance by the Belle experiment running at the KEKB e+e− collider. The branching fraction is measured to be B(B0→J/ψπ0)=[1.62±0.11(stat)±0.06(syst)]×10−5, which is the most precise measurement to date. [...]
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2019-06-24
13:57
[PUBDB-2019-02570] Journal Article
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Measurements of isospin asymmetry and difference of direct C P asymmetries in inclusive $B → X s γ$ decays
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Physical review / D D 99(3), 032012 () [10.1103/PhysRevD.99.032012]  GO
We report measurements of isospin asymmetry Δ0− and difference of direct CP asymmetries ΔACP between charged and neutral B→Xsγ decays. This analysis is based on the data sample containing 772×106B¯B pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e− collider [...]
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