Hiroaki Aihara

Professor

University of Tokyo

Japan

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Research Interests

Particle Physics

100%

Nuclear Physics

100%

Beta Decay

70%

Positron Physics

70%

Positron Annihilation

60%

Hadron Physics

50%

Theoretical Physics

50%

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Articles30

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

Article Link

Year:

2025

Measurement of B → K$^{*}$(892)γ decays at Belle II

Article Link

Year:

2025

Search for lepton flavor-violating decay modes B$^{0}$→ K$^{*0}$τ$^{±}$ℓ$^{∓}$ (ℓ = e, μ) with hadronic B-tagging at Belle and Belle II

Article Link

Year:

2025

Search for lepton-flavor-violating ${\tau }^{-}\to {{\ell}}^{-}{K}_{s}^{0}$ decays at Belle and Belle II

Article Link

Year:

2025

Test of lepton flavor universality with measurements of R(D+) and R(D*+) using semileptonic B tagging at the Belle II experiment

Article Link

Year:

2025

Study of χbJ(2P)→ωϒ(1S) at Belle

Article Link

Year:

2025

Search for a pentaquark state decaying into pJ/ψ in Υ(1, 2S) inclusive decays at Belle

Article Link

Year:

2025

Observation of the decays B+→Σc(2455)++Ξ¯c- and B0→Σc(2455)0Ξ¯c0

Article Link

Year:

2025

Search for lepton-flavor-violating tau decays to ℓα at Belle

Article Link

Year:

2025

Measurement of the CP asymmetry in D+→π+π0 decays at Belle II

Article Link

Year:

2025

Search for lepton-flavor-violating τ$^{−}$→ μ$^{−}$μ$^{+}$μ$^{−}$ decays at Belle II

Article Link

Year:

2024

Search for Rare <math display="inline"><mrow><mi>b</mi><mo stretchy="false">→</mo><mi>d</mi><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>-</mo></mrow></msup></mrow></math> Transitions at Belle

Article Link

Year:

2024

Measurement of the branching fractions of $ \overline{B} $ → D$^{()}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ and $ \overline{B} $ → D$^{()} {D}_s^{-} $ decays at Belle II

Article Link

Year:

2024

Test of light-lepton universality in τ decays with the Belle II experiment

Article Link

Year:

2024

Search for the decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><mi>γ</mi><mi>γ</mi></math> using Belle and Belle II data

Article Link

Year:

2024

Measurements of the Branching Fraction, Polarization, and <math display="inline"><mi>C</mi><mi>P</mi></math> Asymmetry for the Decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><mi>ω</mi><mi>ω</mi></math>

Article Link

Year:

2024

Search for charmed baryons in the <math display="inline"><msubsup><mi mathvariant="normal">Λ</mi><mi>c</mi><mo>+</mo></msubsup><mi>η</mi></math> system and measurement of the branching fractions of <math display="inline"><msub><mi mathvariant="normal">Λ</mi><mi>c</mi></msub><mo stretchy="false">(</mo><mn>2880</mn><msup><mo stretchy="false">)</mo><mo>+</mo></msup></math> and <math display="inline"><msub><mi mathvariant="normal">Λ</mi><mi>c</mi></msub><mo stretchy="false">(</mo><mn>2940</mn><msup><mo stretchy="false">)</mo><mo>+</mo></msup></math> decaying to <math display="inline"><msubsup><mi mathvariant="normal">Λ</mi><mi>c</mi><mo>+</mo></msubsup><mi>η</mi></math> and <math display="inline"><mi>p</mi><msup><mi>D</mi><mn>0</mn></msup></math> relative to <math display="inline"><msub><mi mathvariant="normal">Σ</mi><mi>c</mi></msub><mo stretchy="false">(</mo><mn>2455</mn><mo stretchy="false">)</mo><mi>π</mi></math>

Article Link

Year:

2024

Search for Baryon-Number-Violating Processes in <math display="inline"><msup><mi>B</mi><mo>-</mo></msup></math> Decays to the <math display="inline"><msubsup><mover accent="true"><mi mathvariant="normal">Ξ</mi><mo stretchy="false">¯</mo></mover><mi>c</mi><mn>0</mn></msubsup><msubsup><mover accent="true"><mi mathvariant="normal">Λ</mi><mo stretchy="false">¯</mo></mover><mi>c</mi><mo>-</mo></msubsup></math> Final State

Article Link

Year:

2024

Search for two-body <math display="inline"><mi>B</mi></math> meson decays to <math display="inline"><mrow><msup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> and <math display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">Ω</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo stretchy="false">(</mo><mo>*</mo><mo stretchy="false">)</mo><mn>0</mn></mrow></msubsup></mrow></math>

Article Link

Year:

2024

Operational experience and performance of the Belle II silicon vertex detector after the first SuperKEKB long shutdown

Article Link

Year:

2024

Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic <math display="inline"><mi>B</mi></math>-Meson Decays at Belle II

Article Link

Year:

2023

Measurement of <math display="inline"><mi>C</mi><mi>P</mi></math> Violation in <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup><msup><mi>π</mi><mn>0</mn></msup></math> Decays at Belle II

Article Link

Year:

2023

Measurement of the <math display="inline"><mi>τ</mi></math>-lepton mass with the Belle II experiment

Article Link

Year:

2023

Search for the double-charmonium state with η$_{c}$J/ψ at Belle

Article Link

Year:

2023

Observation of a threshold cusp at the <math display="inline"><mi mathvariant="normal">Λ</mi><mi>η</mi></math> threshold in the <math display="inline"><mi>p</mi><msup><mi>K</mi><mo>-</mo></msup></math> mass spectrum with <math display="inline"><msubsup><mi mathvariant="normal">Λ</mi><mi>c</mi><mo>+</mo></msubsup><mo stretchy="false">→</mo><mi>p</mi><msup><mi>K</mi><mo>-</mo></msup><msup><mi>π</mi><mo>+</mo></msup></math> decays

Article Link

Year:

2023

First Measurement of the Michel Parameter <math display="inline"><mrow><msup><mrow><mi>ξ</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow></math> in the <math display="inline"><mrow><msup><mrow><mi>τ</mi></mrow><mrow><mo>-</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>μ</mi></mrow><mrow><mo>-</mo></mrow></msup><msub><mrow><mover accent="true"><mrow><mi>ν</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mi>μ</mi></mrow></msub><msub><mrow><mi>ν</mi></mrow><mrow><mi>τ</mi></mrow></msub></mrow></math> Decay at Belle

Article Link

Year:

2023

First measurement of the $Q^2$ distribution of X(3915) single-tag two-photon production

Article Link

Year:

2023

Measurement of differential distributions of <math display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>D</mi><mo>*</mo></msup><mo>ℓ</mo><msub><mover accent="true"><mi>ν</mi><mo stretchy="false">¯</mo></mover><mo>ℓ</mo></msub></math> and implications on <math display="inline"><mo stretchy="false">|</mo><msub><mi>V</mi><mrow><mi>c</mi><mi>b</mi></mrow></msub><mo stretchy="false">|</mo></math>

Article Link

Year:

2023

Measurement of the e$^{+}$e$^{−}$→$ {B}_s^0{\overline{B}}_s^0X $ cross section in the energy range from 10.63 to 11.02 GeV using inclusive $ {D}_s^{+} $ and D$^{0}$ production

Article Link

Year:

2023

Study of the muon decay-in-flight in the τ−→μ−ν¯μντ decay to measure the Michel parameter ξ′

Article Link

Year:

2023

Collaborators41

Vitalii Lisovskyi

CNRS – Inserm – Aix Marseille University

FRANCE

Armine Rostomyan

Deutsches Elektronen-Synchrotron DESY

GERMANY

Anselm Vossen

Assistant Professor

Duke University

UNITED STATES

Stefano Bettarini

Associate Professor

University of Pisa

ITALY

Masako Iwasaki

Visiting Professor

Osaka University

JAPAN

Marco Giovanni Maria Destefanis

Professore di II Fascia

Università degli Studi di Torino

ITALY

Kevin Varvell

Professor

University of Sydney

AUSTRALIA

Marcello Campajola

Università degli Studi di Napoli Federico II

ITALY

Jerome Baudot

Professor

University of Strasbourg

FRANCE

William Jacobs

Indiana University Bloomington

UNITED STATES

Robert Kowalewski

Professor

University of Victoria

CANADA

Mario Merola

Associate Professor

Università degli Studi di Sassari Dipartimento di Agraria

ITALY

Janis McKenna

Professor

The University of British Columbia

CANADA

Gunar Schnell

Ikerbasque Research Professor

University of the Basque Country

SPAIN

Jake Bennett

Assistant Professor

University of Mississippi

UNITED STATES

Sourav Patra

University of Louisville

UNITED STATES

Andreas Warburton

Professor

McGill University

CANADA

Torben Ferber

Professor

Karlsruher Institut für Technologie

GERMANY

Thomas E Browder

Professor

University of Hawaii at Manoa

UNITED STATES

Shanette De La Motte

Istituto Nazionale di Fisica Nucleare

ITALY

Sam Cunliffe

University College London

UNITED KINGDOM

Hossain Ahmed

Associate Professor

St. Francis Xavier University

CANADA

swagato banerjee

Associate Professor

University of Louisville

UNITED STATES

Andrzej Bożek

Polska Akademia Nauk Instytut Fizyki

POLAND

Alexandre Beaubien

University of Victoria

CANADA

Slavomira Stefkova

Substitute Professor (W2)

University of Bonn

GERMANY

Diptaparna Biswas

University of Siegen

GERMANY

Daniel Jacobi

University of Bonn

GERMANY

Florian Bernlochner

Professor

University of Bonn

GERMANY

Akimasa Ishikawa

Associate Professor

High Energy Accelerator Research Organization (KEK)

JAPAN

Chia-Ling Hsu

University of Sydney

AUSTRALIA

Seongbae Yang

Korea University

SOUTH KOREA

Chunhui Chen

Professor

Iowa State University

UNITED STATES

Leo Piilonen

Professor

Virginia Polytechnic Institute and State University

UNITED STATES

Seungcheol Lee

Pohang University of Science and Technology

SOUTH KOREA

Alan Schwartz

Professor

University of Cincinnati

UNITED STATES

Michael Roney

Professor

University of Victoria

CANADA

Dmitri Liventsev

Wayne State University

UNITED STATES

ZACHARY LIPTAK

University of Colorado Boulder

UNITED STATES

Giuseppe Finocchiaro

Istituto Nazionale di Fisica Nucleare

ITALY

Masataka Masuda

Osaka University

JAPAN

How do I reach out?

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Hiroaki Aihara

Professor

How do I reach out?

Contact this professor

Research Interests

Ask ApplyKite AI

Articles30

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

Measurement of B → K$^{*}$(892)γ decays at Belle II

Search for lepton flavor-violating decay modes B$^{0}$→ K$^{*0}$τ$^{±}$ℓ$^{∓}$ (ℓ = e, μ) with hadronic B-tagging at Belle and Belle II

Search for lepton-flavor-violating ${\tau }^{-}\to {{\ell}}^{-}{K}_{s}^{0}$ decays at Belle and Belle II

Test of lepton flavor universality with measurements of R(D+) and R(D*+) using semileptonic B tagging at the Belle II experiment

Study of χbJ(2P)→ωϒ(1S) at Belle

Search for a pentaquark state decaying into pJ/ψ in Υ(1, 2S) inclusive decays at Belle

Observation of the decays B+→Σc(2455)++Ξ¯c- and B0→Σc(2455)0Ξ¯c0

Search for lepton-flavor-violating tau decays to ℓα at Belle

Measurement of the CP asymmetry in D+→π+π0 decays at Belle II

Search for lepton-flavor-violating τ$^{−}$→ μ$^{−}$μ$^{+}$μ$^{−}$ decays at Belle II

Search for Rare <math display="inline"><mrow><mi>b</mi><mo stretchy="false">→</mo><mi>d</mi><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>-</mo></mrow></msup></mrow></math> Transitions at Belle

Measurement of the branching fractions of $ \overline{B} $ → D$^{(*)}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ and $ \overline{B} $ → D$^{(*)} {D}_s^{-} $ decays at Belle II

Test of light-lepton universality in τ decays with the Belle II experiment

Search for the decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><mi>γ</mi><mi>γ</mi></math> using Belle and Belle II data

Measurements of the Branching Fraction, Polarization, and <math display="inline"><mi>C</mi><mi>P</mi></math> Asymmetry for the Decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><mi>ω</mi><mi>ω</mi></math>

Operational experience and performance of the Belle II silicon vertex detector after the first SuperKEKB long shutdown

Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic <math display="inline"><mi>B</mi></math>-Meson Decays at Belle II

Measurement of <math display="inline"><mi>C</mi><mi>P</mi></math> Violation in <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup><msup><mi>π</mi><mn>0</mn></msup></math> Decays at Belle II

Measurement of the <math display="inline"><mi>τ</mi></math>-lepton mass with the Belle II experiment

Search for the double-charmonium state with η$_{c}$J/ψ at Belle

First measurement of the $Q^2$ distribution of X(3915) single-tag two-photon production

Measurement of the e$^{+}$e$^{−}$→$ {B}_s^0{\overline{B}}_s^0X $ cross section in the energy range from 10.63 to 11.02 GeV using inclusive $ {D}_s^{+} $ and D$^{0}$ production

Study of the muon decay-in-flight in the τ−→μ−ν¯μντ decay to measure the Michel parameter ξ′

Collaborators41

Vitalii Lisovskyi

Armine Rostomyan

Anselm Vossen

Stefano Bettarini

Masako Iwasaki

Marco Giovanni Maria Destefanis

Kevin Varvell

Marcello Campajola

Jerome Baudot

William Jacobs

Robert Kowalewski

Mario Merola

Janis McKenna

Gunar Schnell

Jake Bennett

Sourav Patra

Andreas Warburton

Torben Ferber

Thomas E Browder

Shanette De La Motte

Sam Cunliffe

Hossain Ahmed

swagato banerjee

Andrzej Bożek

Alexandre Beaubien

Slavomira Stefkova

Diptaparna Biswas

Daniel Jacobi

Florian Bernlochner

Akimasa Ishikawa

Chia-Ling Hsu

Seongbae Yang

Chunhui Chen

Leo Piilonen

Seungcheol Lee

Alan Schwartz

Michael Roney

Dmitri Liventsev

ZACHARY LIPTAK

Giuseppe Finocchiaro

Masataka Masuda

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Measurement of the branching fractions of $ \overline{B} $ → D$^{()}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ and $ \overline{B} $ → D$^{()} {D}_s^{-} $ decays at Belle II