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Determination of from simultaneous measurements of untagged and decays

Publication ,  Journal Article
Adachi, I; Aggarwal, L; Aihara, H; Akopov, N; Aloisio, A; Althubiti, N; Anh Ky, N; Asner, DM; Atmacan, H; Aushev, T; Aushev, V; Aversano, M ...
Published in: Physical Review D
June 26, 2025

We present a measurement of from a simultaneous study of the charmless semileptonic decays and , where , . This measurement uses a data sample of 387 million meson pairs recorded by the Belle II detector at the SuperKEKB electron-positron collider between 2019 and 2022. The two decays are reconstructed without identifying the partner mesons. We simultaneously measure the differential branching fractions of and decays as functions of (momentum transfer squared). From these, we obtain total branching fractions and . By fitting the measured partial branching fractions as functions of , together with constraints on the nonperturbative hadronic contribution from lattice QCD calculations, we obtain . Here, the first uncertainty is statistical, the second is systematic, and the third is theoretical.

Duke Scholars

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

June 26, 2025

Volume

111

Issue

11

Publisher

American Physical Society (APS)
 

Citation

APA
Chicago
ICMJE
MLA
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Adachi, I., Aggarwal, L., Aihara, H., Akopov, N., Aloisio, A., Althubiti, N., … Žlebčík, R. (2025). Determination of |Vub| from simultaneous measurements of untagged B0π+ν and B+ρ0+ν decays. Physical Review D, 111(11). https://doi.org/10.1103/jnwn-ts6q
Adachi, I., L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, et al. “Determination of |Vub| from simultaneous measurements of untagged B0π+ν and B+ρ0+ν decays.” Physical Review D 111, no. 11 (June 26, 2025). https://doi.org/10.1103/jnwn-ts6q.
Adachi I, Aggarwal L, Aihara H, Akopov N, Aloisio A, Althubiti N, et al. Determination of |Vub| from simultaneous measurements of untagged B0π+ν and B+ρ0+ν decays. Physical Review D. 2025 Jun 26;111(11).
Adachi, I., et al. “Determination of |Vub| from simultaneous measurements of untagged B0π+ν and B+ρ0+ν decays.” Physical Review D, vol. 111, no. 11, American Physical Society (APS), June 2025. Crossref, doi:10.1103/jnwn-ts6q.
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Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

June 26, 2025

Volume

111

Issue

11

Publisher

American Physical Society (APS)