Search Results - "H. Hayashii"
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Averages of b-hadron, c-hadron, and τ-lepton properties as of summer 2016
Published in The European physical journal. C, Particles and fields (21-12-2017)“…This article reports world averages of measurements of b -hadron, c -hadron, and τ -lepton properties obtained by the Heavy Flavor Averaging Group using…”
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2
Measurement of the differential branching fraction and forward-backward asymmetry for B --> K()l+l
Published in Physical review letters (23-10-2009)“…We study B --> K(*)l+l- decays (l = e, mu) based on a data sample of 657 x 10(6) BB pairs collected with the Belle detector at the KEKB e+e- collider. We…”
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3
Observation of X(3872)→J/ψγ and search for X(3872)→ψ'γ in B decays
Published in Physical review letters (26-08-2011)“…We report a study of B→(J/ψγ)K and B→(ψ'γ)K decay modes using 772×10⁶ B ̅B events collected at the Υ(4S) resonance with the Belle detector at the KEKB…”
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4
First Measurements of Absolute Branching Fractions of the Ξ_{c}^{0} Baryon at Belle
Published in Physical review letters (01-03-2019)“…We present the first measurements of absolute branching fractions of Ξ_{c}^{0} decays into Ξ^{-}π^{+}, ΛK^{-}π^{+}, and pK^{-}K^{-}π^{+} final states. The…”
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5
Observation of two resonant structures in e+ e- -->pi+ pi- psi(2S) via initial-state radiation at Belle
Published in Physical review letters (05-10-2007)“…The cross section for e+ e- --> pi+ pi- psi(2S) between threshold and sqrt[s]=5.5 GeV is measured using 673 fb(-1) of data on and off the Upsilon(4S) resonance…”
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6
Measurement of the e+e- -->pi+pi- J/psi cross section via initial-state radiation at Belle
Published in Physical review letters (02-11-2007)“…The cross section for e(+)e(-)-->pi(+)pi(-)J/psi between 3.8 and 5.5 GeV/c(2) is measured using a 548 fb(-1) data sample collected on or near the Upsilon(4S)…”
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7
Evidence of a New Excited Charmed Baryon Decaying to Σ_{c}(2455)^{0,++}π^{±}
Published in Physical review letters (20-01-2023)“…We present the study of B[over ¯]^{0}→Σ_{c}(2455)^{0,++}π^{±}p[over ¯] decays based on 772×10^{6} BB[over ¯] events collected with the Belle detector at the…”
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8
Search for a Heavy Neutrino in τ Decays at Belle
Published in Physical review letters (24-11-2023)“…We report on a search for a heavy Majorana neutrino in the decays τ^{-}→π^{-}ν_{h}, ν_{h}→π^{±}ℓ^{∓}, ℓ=e, μ. The results are obtained using the full data…”
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9
Observation of Z_{b}(10610) and Z_{b}(10650) Decaying to B Mesons
Published in Physical review letters (27-05-2016)“…We report the analysis of the three-body e^{+}e^{-}→BB[over ¯]π^{±}, BB[over ¯]^{*}π^{±}, and B^{*}B[over ¯]^{*}π^{±} processes, including the first…”
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10
Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment
Published in Physical review letters (11-01-2019)“…We report on the first Belle search for a light CP-odd Higgs boson, A^{0}, that decays into low mass dark matter, χ, in final states with a single photon and…”
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11
Observation of Ξ(1620)^{0} and Evidence for Ξ(1690)^{0} in Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} Decays
Published in Physical review letters (22-02-2019)“…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 …”
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12
First Measurement of the B^{+}→π^{+}π^{0}π^{0} Branching Fraction and CP Asymmetry
Published in Physical review letters (05-05-2023)“…We study B^{+}→π^{+}π^{0}π^{0} using 711 fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-}…”
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13
Observation of a narrow charmoniumlike state in exclusive B+/--->K+/-pi+pi-J/psi decays
Published in Physical review letters (31-12-2003)“…We report the observation of a narrow charmoniumlike state produced in the exclusive decay process B+/--->K+/-pi(+)pi(-)J/psi. This state, which decays into…”
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14
Search for an H-dibaryon with a mass near 2mΛ in Υ(1S) and Υ(2S) decays
Published in Physical review letters (31-05-2013)“…We report the results of a high-statistics search for H dibaryon production in inclusive Υ(1S) and Υ(2S) decays. No indication of an H dibaryon with a mass…”
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15
Observation of anomalous upsilon(1S)pi+pi(-) and upsilon(2S)pi+pi(-) production near the upsilon(5S) resonance
Published in Physical review letters (21-03-2008)“…We report the first observation of e;{+}e;{-}-->Upsilon(1S)pi;{+}pi;{-}, Upsilon(2S)pi;{+}pi;{-}, and first evidence for e;{+}e;{-}-->Upsilon(3S)pi;{+}pi;{-},…”
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Observation of a Near-Threshold ω J / ψ Mass Enhancement in Exclusive B → K ω J / ψ Decays
Published in Physical review letters (13-05-2005)Get full text
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17
Search for lepton-flavor-violating τ decays into a lepton and a vector meson
Published in Physics letters. B (16-05-2011)“…We search for lepton-flavor-violating τ→ℓV0 decays, where ℓ is an electron or muon and V0 is one of the vector mesons ρ0, ϕ, ω, K⁎0 and K¯⁎0. We use 854 fb−1…”
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18
Evidence of a new narrow resonance decaying to χ(c1)γ in B→χ(c1)γK
Published in Physical review letters (19-07-2013)“…We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] events collected at the Υ(4S) resonance with the Belle detector at the KEKB…”
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19
First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Λ_{c}^{+}→pK^{+}π^{-}
Published in Physical review letters (01-07-2016)“…We report the first observation of the decay Λ_{c}^{+}→pK^{+}π^{-} using a 980 fb^{-1} data sample collected by the Belle detector at the KEKB…”
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20
Measurement of inclusive radiative B-meson decays with a photon energy threshold of 1.7 GeV
Published in Physical review letters (11-12-2009)“…Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. For…”
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