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We critically analyze the body of results that hints to the existence of New Physics from possible violations of lepton universality observed by the LHCb experiment in the $\mu/e$ ratios $R_{K}$ and $R_{K^*}$ to the $g-2$ lepton anomalies.…

Recent measurements have revealed a number of intriguing deviations from the Standard Model predictions in $B$ meson decays, in particular in observables testing lepton flavour universality. We review their experimental status and…

高能物理 - 唯象学 · 物理学 2017-07-13 Monika Blanke

Precision studies of flavour-changing processes involving quarks and leptons provide a number of ways to improve knowledge of the Standard Model and search for physics beyond it. There are excellent short- and mid-term prospects for…

高能物理 - 实验 · 物理学 2025-05-07 The ATLAS Collaboration , Belle II Collaboration , CMS Collaboration , LHCb Collaboration

Semileptonic decays of $B$ mesons that proceed via $b\rightarrow u$ and $b\rightarrow c$ transitions, as well as rare leptonic $B$ decays, are fertile grounds for probing new physics beyond the Standard Model. The Belle II experiment…

高能物理 - 实验 · 物理学 2023-03-06 Priyanka Cheema

Tests of lepton flavour universality in charged-current $B$ decays offer an excellent opportunity to test the Standard Model, and show hints of new physics in analyses performed by the LHCb, Belle and BaBar experiments. These proceedings…

高能物理 - 实验 · 物理学 2019-07-03 Suzanne Klaver

We present results of global fits of all relevant experimental data on rare $b \to s$ decays. We observe significant tensions between the Standard Model predictions and the data. After critically reviewing the possible sources of…

高能物理 - 唯象学 · 物理学 2015-09-30 Wolfgang Altmannshofer , David M. Straub

One of the fundamental predictions of the Standard Model is Lepton Flavour Universality. Any deviation from this prediction would indicate the existence of physics beyond the Standard Model. Recent LHCb measurements present a pattern of…

高能物理 - 唯象学 · 物理学 2018-08-21 Yoav Afik , Jonathan Cohen , Eitan Gozani , Enrique Kajomovitz , Yoram Rozen

The LHCb experiment has made several measurements in $b \to s$ transitions which indicate tensions with the Standard Model predictions. Assuming the source of these tensions to be new physics, we present new global fits to all Wilson…

高能物理 - 唯象学 · 物理学 2018-12-20 T. Hurth , A. Arbey , F. Mahmoudi , S. Neshatpour

The mixing of neutral mesons is sensitive to some of the highest scales probed in laboratory experiments. In light of the planned LHCb Upgrade II, a possible upgrade of Belle II, and the broad interest in flavor physics in the tera-$Z$…

高能物理 - 唯象学 · 物理学 2020-10-07 J. Charles , S. Descotes-Genon , Z. Ligeti , S. Monteil , M. Papucci , K. Trabelsi , L. Vale Silva

The updated analysis of the LHCb Collaboration on the lepton flavor violation suggests that the new physics should couple to muons and electrons with comparable magnitudes, resulting in the anomalies in both rare decay channels, $b…

高能物理 - 唯象学 · 物理学 2023-11-13 Sang Quang Dinh , Hieu Minh Tran

Heavy flavor physics entered a new era when the Belle II experiment observed its first collision. There are several hints found so far by BaBar, Belle, and LHCb in particular, that suggest the physics beyond the Standard Model appearing in…

高能物理 - 格点 · 物理学 2019-02-26 Shoji Hashimoto

We report on recent results obtained by the Belle II experiment related to searches for beyond-the-standard-model physics. The $B$ meson decay data sample used corresponds to an integrated luminosity of $L = 189$ fb$^{-1}$. In recent years,…

高能物理 - 实验 · 物理学 2023-08-15 Roberta Volpe , Belle II Collaboration

Flavour physics has a long tradition of paving the way for direct discoveries of new particles and interactions. Results over the last decade have placed stringent bounds on the parameter space of physics beyond the Standard Model. Early…

高能物理 - 实验 · 物理学 2015-06-04 Marco Gersabeck , Vladimir V. Gligorov , Nicola Serra

The Standard Model (SM) predicts the universality of lepton couplings with the electroweak gauge bosons. Semileptonic decays of $b$-hadrons provide a powerful framework for testing the SM and probing possible New Physics effects. In…

高能物理 - 实验 · 物理学 2026-04-30 Davide Fazzini

In the coming years, experiments underway will increase the sensitivity to charged lepton flavor violation by four orders of magnitude. These experiments will stringently probe weak scale physics. I review the status of global symmetries in…

高能物理 - 唯象学 · 物理学 2017-08-23 Jonathan L. Feng

The experimental measurements on flavour physics, in tension with Standard Model predictions, exhibit large sources of Lepton Flavour Universality violation. We perform an analysis of the effects of the global fits on the Wilson…

高能物理 - 唯象学 · 物理学 2022-03-22 Jorge Alda , Jaume Guasch , Siannah Penaranda

The Standard Model predicts that the electroweak couplings to the three charged leptons are identical. However, in the last decade, experimental measurements have suggested that semileptonic processes involving taus could have a slightly…

高能物理 - 实验 · 物理学 2024-10-24 Rizwaan Mohammed

In the Standard Model (SM), the coupling of the electroweak gauge bosons to the leptons is lepton flavour universal. Tests of this property constitute sensitive probes for new physics models that violate lepton flavour universality. Recent…

高能物理 - 实验 · 物理学 2018-07-01 Christoph Langenbruch

In view of the emerging hints for the violation of lepton flavour universality in several $B$-meson decays, we conduct a model-independent study (effective field theory approach) of several well-motivated new physics scenarios. Taking into…

高能物理 - 唯象学 · 物理学 2021-04-02 J. Kriewald , C. Hati , J. Orloff , A. M. Teixeira
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