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We study the Higgs branches of the 6D (1, 0) little string theories that live on the world volume of NS5-branes probing an ADE-singularity in the heterotic E8×E8 and Spin(32)/Z2 string theories. On the E8×E8 side, such little string theories (LSTs) are obtained via fusion of orbi-instanton SCFTs. [...]

We study the LHC phenomenology of an Axion Like Particle (ALP) that couples only derivatively with the top quark at tree level. We inspect the radiatively induced couplings with the SM fermions and (gauge) bosons and the associated production and decay mechanisms of the ALP. [...]

We consider inflationary models with multiple spectator axions coupled to dark gauge sectors via Chern-Simons (CS) terms. The energy injection into Abelian gauge fields from the axions engenders a multi-peak profile for scalar and tensor spectra. [...]

The thermal freeze-out mechanism in its classical form is tightly connected to physicsbeyond the Standard Model around the electroweak scale, which has been the target of enormousexperimental efforts. In this work we study a dark matter model in which freeze-out is triggeredby a strong first-order phase transition in a dark sector, and show that this phase transitionmust also happen close to the electroweak scale, i.e. [...]

The BELLE experiment at the KEKB collider in Tsukuba operated as a B-factory until 2018, makingsignificant contributions to flavor physics. Building on this legacy, the BELLE II experiment, anupgraded version, now operates at the SuperKEKB energy-asymmetric 𝑒+𝑒− collider. [...]

The transverse momentum-dependent fragmentation functions (TMD FFs) of heavy (bottom and charm) quarks, which we recently introduced, are universal building blocks that enter predictions for a large number of observables involving final-state heavy quarks or hadrons. They enable the extension of fixed-order subtraction schemes to quasi-collinear limits, and are of particular interest in their own right as probes of the nonperturbative dynamics of hadronization. [...]

We present measurements of the branching fractions of eight $ {\overline{B}}^0 $ → D$^{(*)+}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $, B$^{−}$ → D$^{(*)0}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle II detector, corresponding to an integrated luminosity of 362 fb$^{−1}$ [...]

We present measurements of the branching fractions of eight $ {\overline{B}}^0 $ → D$^{(*)+}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $, B$^{−}$ → D$^{(*)0}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle II detector, corresponding to an integrated luminosity of 362 fb$^{−1}$ [...]

We present a study of $ {\Xi}_c^0\to {\Xi}^0{\pi}^0 $, $ {\Xi}_c^0\to {\Xi}^0\eta $, and $ {\Xi}_c^0\to {\Xi}^0{\eta}^{\prime } $ decays using the Belle and Belle II data samples, which have integrated luminosities of 980 fb$^{−1}$ and 426 fb$^{−1}$, respectively. We measure the following relative branching fractions$ {\displaystyle \begin{array}{c}\mathcal{B}\left({\Xi}_c^0\to {\Xi}^0{\pi}^0\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.48\pm 0.02\left(\textrm{stat}\right)\pm 0.03\left(\textrm{syst}\right),\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Xi}^0\eta \right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.11\pm 0.01\left(\textrm{stat}\right)\pm 0.01\left(\textrm{syst}\right),\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Xi}^0{\eta}^{\prime}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.08\pm 0.02\left(\textrm{stat}\right)\pm 0.01\left(\textrm{syst}\right)\end{array}} $for the first time, where the uncertainties are statistical (stat) and systematic (syst) [...]