Motivated by the crucial role played by the discrete flavour symmetry groups in explaining the observed neutrino oscillation data, we consider the application $A_4$ modular symmetry in the linear seesaw framework. The basic idea behind using the modular symmetry is to minimize the necessity of the inclusion of extra flavon fields having specific vacuum expectation value (VEV) alignments. ...
The B3−L2 Z′ model may explain some gross features of the fermion mass spectrum as well as the b -> sll anomalies. The Z' acquires its mass via a TeV-scale scalar field, the flavon (θ), whose VEV spontaneously breaks the family non-universal gauged U(1) symmetry. In this talk, I will discuss the phenomenology of the flavon field. After introducing the model, with an emphasis on its scalar...
Charm Physics is highly topical in the current flavour landscape, especially after the announcement by LHCb of the measurement of direct CP asymmetries in the separate decays of $D^0\rightarrow K^+K^-$ and consequently $D^0\rightarrow \pi^+\pi^-$, which was preceded by the discovery of direct CP violation in the difference of these two asymmetries. The experimental result is extremely...
CP violation in the quark sector has been established, which is described by the CKM phenomenon, and we are entering the precision era as far as Flavor physics is concerned. Accumulation of more data from the LHCb and Belle II experiments will, hopefully, guide us to the pathway to physics beyond the standard model. But the tiny CP asymmetry observed in the quark sector cannot explain the...
We present the most recent $BABAR$ searches for Dark-matter states with masses below the electroweak scale.The results are based on the full data set of about 470 $\text{fb}^{-1}$ collected at the $\Upsilon(4S)$ resonance by the $BABAR$ detector at the PEP-II collider.
They include, in particular, a search for decays like $B^{0}\to\psi_{D} {\cal B}$ where $\cal{B}$ is a baryon (proton,...
Employing the full $BABAR$ dataset, the first two-dimensional unbinned angular analysis of the semileptonic decay $\overline{B}\to D\ell^m \overline{\nu_\ell}$ is performed in both $q^2$ and lepton helicity angle, making use of the hadronic reconstruction of the tag-side $B$ meson. Here $\ell$ stands for an electron or a muon. A novel data-driven signal-background separation procedure with...
SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < 𝜂 < 8.6, complementary to all the other experiments at the LHC. The experiment is located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on a 800 kg target mass of tungsten...
The Standard Model Effective Field Theory (SMEFT) is a powerful tool to search for new physics in a model-independent way. We explore the synergies arising from different types of observables in a combined, global SMEFT fit. Specifically, we investigate the combination of top-quark measurements, $b\to s$ flavor changing neutral current transitions, $Z \to b\bar b$ and $Z \to c\bar c$, as well...
Theoretical developments over the last few years have lead to large shifts in the nuclear corrections to superallowed beta decays, albeit with enlarged uncertainties given different theoretical approaches. Nevertheless, this has lead to a shift in the value of $V_{ud}$, and a discrepancy when compared to the value implied by CKM unitarity.
On top of this, improved precision in lattice QCD...
Deviations from the Standard Model have long been observed in semileptonic B-meson decays, notably b→ sll transitions, triggering speculations on potential New Physics effects in this sector. After the recent update of RK(*) and BR(B(s) → μμ) by the LHCb collaboration, the sole remaining significant deviations from the SM in FCNC B decays are found in the branching ratios of mesonic decays...
The HIBEAM-NNBAR program is a proposed two-stage experiment at the European Spallation Source (ESS) designed to to search for baryon number violation, which is – together with C and CP violation – one of the three fundamental Sakharov conditions to explain the observed baryon asymmetry of the Universe. Taking advantage of the ESS' unique capabilities as the future brightest neutron source, the...
We report on the construction of a factorization theorem that allows to
systematically include QCD corrections to the contribution of the
electromagnetic dipole operator O7 to the $\bar B_s \to \mu^+\mu^-$
decay amplitude. We elaborate on how the occurring endpoint divergences
appearing in individual momentum regions cancel, and show how the
resulting rapidity logarithms can be isolated...
Electric dipole moments (EDMs) in spin 1/2 particles such as the neutron or the electron are highly sensitive probes for CP violation beyond the Standard Model, which is required in order to fully explain the baryon asymmetry in the universe. n2EDM is an experiment in the commissioning phase at the Paul Scherrer Institute and one leading effort to search for the neutron EDM. The nEDM...
Nuclear collisions at LHC energies are a unique opportunity to study hadronization mechanisms and the formation of exotic states. The ALICE experiment has excellent capabilities of identifying hadrons in a wide momentum range. This represents a great advantage in searches for exotic QCD bound states originated from a medium of deconfined QCD matter. The data collected so far allow to search...
