VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • First measurement of ▫$R(X_{\tau/\ell})$▫ as an inclusive test of the ▫$b \to c \tau \nu$▫ anomaly
    Adachi, Ichiro ...
    We measure the tau-to-light-lepton ratio of inclusive 𝐵-meson branching fractions 𝑅⁡(𝑋𝜏/ℓ)≡ℬ⁡(𝐵→𝑋⁢𝜏⁢𝜈)/ℬ⁡(𝐵→𝑋⁢ℓ⁢𝜈), where ℓ indicates an electron or muon, and thereby test the universality ... of charged-current weak interactions. We select events that have one fully reconstructed 𝐵 meson and a charged lepton candidate from 189  fb−1 of electron-positron collision data collected with the Belle II detector. We find 𝑅⁡(𝑋𝜏/ℓ)=0.228±0.016⁢(stat)±0.036⁢(syst), in agreement with standard-model expectations. This is the first direct measurement of 𝑅⁡(𝑋𝜏/ℓ).
    Vir: Physical review letters online. - ISSN 1079-7114 (Vol. 132, 211804, 2024, str. 211804-1-211804-8)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2024
    Jezik - angleški
    COBISS.SI-ID - 202299139

    Povezava(-e):

    https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.211804
    DOI

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