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helps select models for anomalies.
Eur Phys J C Part Fields
August 2022
Physik-Institut, Universität Zürich, 8057 Zurich, Switzerland.
As shown in Allanach et al. (Global fits of third family hypercharge models to neutral current B-anomalies and electroweak precision observables. arXiv:2103.
View Article and Find Full Text PDFSearch for Neutrino-Induced Neutral-Current Δ Radiative Decay in MicroBooNE and a First Test of the MiniBooNE Low Energy Excess under a Single-Photon Hypothesis.
Phys Rev Lett
March 2022
Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
We report results from a search for neutrino-induced neutral current (NC) resonant Δ(1232) baryon production followed by Δ radiative decay, with a ⟨0.8⟩ GeV neutrino beam. Data corresponding to MicroBooNE's first three years of operations (6.
View Article and Find Full Text PDFMixed Strong-Electroweak Corrections to the Drell-Yan Process.
Phys Rev Lett
January 2022
Dipartimento di Fisica "Aldo Pontremoli", University of Milano and INFN, Sezione di Milano, I-20133 Milano, Italy.
We report on the first complete computation of the mixed QCD-electroweak (EW) corrections to the neutral-current Drell-Yan process. Superseding previously applied approximations, our calculation provides the first result at this order that is valid in the entire range of dilepton invariant masses. The two-loop virtual contribution is computed by using semianalytical techniques, overcoming the technical problems in the evaluation of the relevant master integrals.
View Article and Find Full Text PDFA search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production.
View Article and Find Full Text PDFMinimal Explanation of Flavor Anomalies: B-Meson Decays, Muon Magnetic Moment, and the Cabibbo Angle.
Phys Rev Lett
August 2021
INFN, Sezione di Trieste, SISSA, Via Bonomea 265, 34136 Trieste, Italy.
Significant deviations from the standard model are observed in semileptonic charged and neutral-current B decays, the muon magnetic moment, and the extraction of the Cabibbo angle. We propose that these deviations point towards a coherent pattern of new physics effects induced by two scalar mediators, a leptoquark S_{1} and a charged singlet ϕ^{+}. While S_{1} can provide solutions to charged-current B decays and the muon magnetic moment, and ϕ^{+} can accommodate the Cabibbo-angle anomaly independently, their one-loop level synergy can also address neutral-current B decays.
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