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The availability of high intensity kaon beams at the CERN SPS North Area gives rise to unique possibilities for sensitive tests of the Standard Model in the quark flavor sector. Precise measurements of the branching ratios for the…

高能物理 - 实验 · 物理学 2023-03-22 Matthew Moulson

We discuss the implications of the recently reported $R_K$ and $R_{K^*}$ anomalies, the lepton flavor non-universality in the $B\to K\ell^+\ell^-$ and $B\to K^*\ell^+\ell^-$. Using two sets of hadronic inputs of form factors, we perform a…

高能物理 - 唯象学 · 物理学 2017-12-08 Wei Wang , Shuai Zhao

Flavour physics offers interesting probes for the exploration of the Standard Model and the search for new physics. In these lectures, we focus on B- and K-meson decays, introduce the concept of low-energy effective Hamiltonians to describe…

高能物理 - 唯象学 · 物理学 2016-11-09 Robert Fleischer

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

Experimental data on rare $B$-meson decays indicate deviations from Standard Model predictions. In studies of these decays, possible new sources of CP violation are often neglected. We discuss CP violation in the rare $B$-meson decays $B\to…

高能物理 - 唯象学 · 物理学 2024-04-12 Robert Fleischer , Eleftheria Malami , Anders Rehult , K. Keri Vos

Motivated by recent experimental measurements on flavour physics, in tension with Standard Model predictions, we perform an updated analysis of New Physics violating Lepton Flavour Universality, by using the effective Lagrangian approach…

高能物理 - 唯象学 · 物理学 2019-09-04 Jorge Alda , Jaume Guasch , Siannah Peñaranda

Dedicated experiments searching for lepton flavour violation can be performed very sensitively using K-decays and $\mu$-decays as well as neutrinoless double $\beta$-decay and muonium to antimuonium conversion. Although there is no…

高能物理 - 实验 · 物理学 2016-08-31 Klaus P. Jungmann

With the running B, kaon and neutrino physics experiments, flavour physics takes centre stage within today's particle physics. We discuss the opportunities offered by these experiments in our search for new physics beyond the SM and discuss…

高能物理 - 唯象学 · 物理学 2008-11-26 Tobias Hurth

In this work we study possible connections between $B$-meson anomalies and Kaon physics observables in the context of combined solutions with the singlet and triplet scalar leptoquarks $S_1$ and $S_3$. By assuming a flavor structure for the…

高能物理 - 唯象学 · 物理学 2022-04-27 David Marzocca , Sokratis Trifinopoulos , Elena Venturini

Semileptonic $b \rightarrow s\ell \ell$ processes constitute a good probe for new physics phenomena: new particles contributing to the loops could affect branching fractions and angular distributions, and have different couplings to…

高能物理 - 实验 · 物理学 2017-08-09 Guido Andreassi

We present a new class of models of lepton flavor in the composite Higgs framework. Following the concept of minimality, they lead to a rich phenomenology in good agreement with the current experimental picture. Because of a unification of…

高能物理 - 唯象学 · 物理学 2016-07-19 Adrian Carmona , Florian Goertz

Searches for the lepton number violating $K^{+} \rightarrow \pi^{-} \mu^{+} e^{+}$ decay and the lepton flavour violating $K^{+} \rightarrow \pi^{+} \mu^{-} e^{+}$ and $\pi^{0} \rightarrow \mu^{-} e^{+}$ decays are reported using data…

高能物理 - 实验 · 物理学 2021-10-13 NA62 Collaboration

We confront the indications of lepton flavor universality (LFU) violation observed in semi-tauonic $B$ meson decays with new physics (NP) searches using high $p_T$ tau leptons at the LHC. Using effective field theory arguments we correlate…

高能物理 - 唯象学 · 物理学 2016-11-15 Darius A. Faroughy , Admir Greljo , Jernej F. Kamenik

After a brief introduction to the so-called flavour problem, we discuss the role of rare K decays in probing the mechanism of quark-flavour mixing. Particular attention is devoted to the formulation of the Minimal Flavour Violation…

高能物理 - 唯象学 · 物理学 2009-11-10 Gino Isidori

We present a short overview of recent work on the topic of flavour violation in the presence of a sequential fourth generation (4G) of quarks and leptons. We discuss the implications of this simple extension of the Standard Model (SM3) for…

高能物理 - 唯象学 · 物理学 2010-11-29 Tillmann Heidsieck

The impact of rare lepton decays ($\mu \to e \gamma$, $\tau \to \mu \gamma$, >...) and rare $B$ and $K$ decays ($B\to \ell^+\ell^-$, $B\to \ell\nu$, $K\to \pi \nu\nu$, $K\to\ell\nu$, ...) in probing the existence of an underlying flavour…

高能物理 - 唯象学 · 物理学 2008-11-26 Gino Isidori

The R_K measurement by LHCb suggests non-standard lepton non-universality (LNU) to occur in b -> s l+ l- transitions, with effects in muons rather than electrons. A number of other measurements of b -> s l+ l- transitions by LHCb and…

高能物理 - 唯象学 · 物理学 2016-10-17 Diego Guadagnoli , Dmitri Melikhov , Meril Reboud

In absence of direct signs of new physics at the LHC, flavour physics provides an ideal laboratory to look for deviations from the Standard Model and explore an energy regime beyond the LHC reach. Here, new results in CP violation and rare…

高能物理 - 实验 · 物理学 2014-11-25 Patrick Koppenburg

We present the results of an extensive analysis of flavour physics in both quark and lepton sectors, in the Littlest Higgs model with T-parity (LHT). In the quark sector, we identify some interesting scenarios for new mirror quark masses…

高能物理 - 唯象学 · 物理学 2011-03-23 Cecilia Tarantino