TY - JOUR

T1 - Test of Lepton Universality and Measurement of the Form Factors of D0→K*(892)−μ+νμ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Adlarson, P.

AU - Afedulidis, O.

AU - Ai, X. c.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Balossino, I.

AU - Ban, Y.

AU - Bao, H.-R.

AU - Batozskaya, V.

AU - Begzsuren, K.

AU - Berger, N.

AU - Berlowski, M.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bianco, E.

AU - Bortone, A.

AU - Briere, R. a.

AU - Brueggemann, A.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2025/1/2

Y1 - 2025/1/2

N2 - One of the main goals of studying semileptonic decays in flavor physics is to gain a better understanding of hadronic transitions in the nonperturbative region of Quantum Chromodynamics. This involves measuring Cabibbo-Kobayashi-Maskawa matrix elements, understanding form factors, and comparing them with theoretical predictions. We report a first study of the semileptonic decay D0→K-π0μ+νμ by analyzing an e+e- annihilation data sample of 7.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The absolute branching fraction of D0→K-π0μ+νμ is measured for the first time, providing necessary input for extracting the c→s Cabibbo-Kobayashi-Maskawa matrix element through this process. This measurement allows us to test lepton flavor universality, with no indication of violation found. Furthermore, a series of hadronic form factors have been determined and compared with theoretical predictions, which will impose stricter constraints on theoretical models.

AB - One of the main goals of studying semileptonic decays in flavor physics is to gain a better understanding of hadronic transitions in the nonperturbative region of Quantum Chromodynamics. This involves measuring Cabibbo-Kobayashi-Maskawa matrix elements, understanding form factors, and comparing them with theoretical predictions. We report a first study of the semileptonic decay D0→K-π0μ+νμ by analyzing an e+e- annihilation data sample of 7.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The absolute branching fraction of D0→K-π0μ+νμ is measured for the first time, providing necessary input for extracting the c→s Cabibbo-Kobayashi-Maskawa matrix element through this process. This measurement allows us to test lepton flavor universality, with no indication of violation found. Furthermore, a series of hadronic form factors have been determined and compared with theoretical predictions, which will impose stricter constraints on theoretical models.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85214663187&origin=inward&txGid=14b94f14765236062aa77e6a7857b13b

U2 - 10.1103/PhysRevLett.134.011803

DO - 10.1103/PhysRevLett.134.011803

M3 - Article

VL - 134

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 1

M1 - 011803

ER -