A. Ishikawa

Research interests

Publications

• Measurement of R ( D ) and R ( D * ) with a Semileptonic Tagging Method

  Physical Review Letters · 2020 · 10.1103/physrevlett.124.161803

• Measurement of the τ Lepton Polarization and R ( D * ) in the Decay B ¯ → D * τ − ν ¯ τ

  Physical Review Letters · 2017 · https://doi.org/10.1103/physrevlett.118.211801

• Lepton-Flavor-Dependent Angular Analysis of B → K * ℓ + ℓ −

  Physical Review Letters · 2017 · 10.1103/physrevlett.118.111801

• Measurement of the branching ratio of B ¯ 0 → D * + τ − ν ¯ τ relative to B ¯ 0 → D * + ℓ − ν ¯ ℓ decays with a semileptonic tagging method

  Physical review. D/Physical review. D. · 2016 · 10.1103/physrevd.94.072007

• Measurement of the branching ratio of B ¯ → D ( * ) τ − ν ¯ τ relative to B ¯ → D ( * ) ℓ − ν ¯ ℓ decays with hadronic tagging at Belle

  Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 2015 · https://doi.org/10.1103/physrevd.92.072014

• Study of e+e−→π+π−J/ψ and Observation of a Charged Charmoniumlike State at Belle

  Physical Review Letters · 2013 · https://doi.org/10.1103/physrevlett.110.252002

• Observation of Two Charged Bottomoniumlike Resonances in Υ ( 5 S ) Decays

  Physical Review Letters · 2012 · https://doi.org/10.1103/physrevlett.108.122001

• Observation of two resonancelike structures in the π + χ c 1 mass distribution in exclusive B ¯ 0 → K − π + χ c 1 decays

  Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 2008 · 10.1103/physrevd.78.072004

• Observation of a Resonancelike Structure in the π+−ψ′ Mass Distribution in Exclusive B→Kπ+−ψ′ Decays

  Physical Review Letters · 2008 · https://doi.org/10.1103/physrevlett.100.142001

• Observation of a Near-Threshold Enhancement in the e + e − → Λ c + Λ c − Cross Section Using Initial-State Radiation

  Physical Review Letters · 2008 · 10.1103/physrevlett.101.172001

• Observation of a Charmoniumlike State Produced in Association with a J/ψ in e+e− Annihilation at s≈10.6 GeV

  Physical Review Letters · 2007 · 10.1103/physrevlett.98.082001

• Observation of Two Resonant Structures in e + e − → π + π − ψ ( 2 S ) via Initial-State Radiation at Belle

  Physical Review Letters · 2007 · 10.1103/physrevlett.99.142002

• Measurement of the e+e−→π+π−J/ψ Cross Section Via Initial-State Radiation at Belle

  Physical Review Letters · 2007 · 10.1103/physrevlett.99.182004

• Observation of a χ c 2 ′ Candidate in γ γ → D D ¯ Production at Belle

  Physical Review Letters · 2006 · 10.1103/physrevlett.96.082003

• Observation of New States Decaying into Λ c + K − π + and Λ c + K S 0 π −

  Physical Review Letters · 2006 · 10.1103/physrevlett.97.162001

• Observation of a Near-Threshold ω J / ψ Mass Enhancement in Exclusive B → K ω J / ψ Decays

  Physical Review Letters · 2005 · 10.1103/physrevlett.94.182002

• Study of time-dependent CP violation in B0 → J/ψπ0 decays

  Infoscience (Ecole Polytechnique Fédérale de Lausanne) · 2004 · 10.1103/physrevlett.93.261801

• Study of B−→D**0π−(D**0→D(*)+π−) decays

  Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 2004 · 10.1103/physrevd.69.112002

• Observation of the D s J ( 2317 ) and D s J ( 2457 ) in B Decays

  Physical Review Letters · 2003 · 10.1103/physrevlett.91.262002

• Observation of the decay B0 → Λc+p

  Institutional Repositories DataBase (IRDB) · 2003

• Observation of a Narrow Charmoniumlike State in Exclusive B ± → K ± π + π − J / ψ Decays

  Physical Review Letters · 2003 · 10.1103/physrevlett.91.262001

• Observation of Double cc¯ Production in e+e− Annihilation at s≈10.6 GeV

  Physical Review Letters · 2002 · 10.1103/physrevlett.89.142001

• Observation of B(0)-->D((*)0)pp.

  PubMed · 2002 · 10.1103/physrevlett.89.151802

• A measurement of the branching fraction for the inclusive B→Xγ decays with the Belle detector

  Physics Letters B · 2001 · 10.1016/s0370-2693(01)00626-8

• Observation of Large CP Violation in the Neutral B Meson System

  Physical Review Letters · 2001 · 10.1103/physrevlett.87.091802

Current projects

No projects listed.