FASER, the ForwArd Search ExpeRiment, is an LHC experiment located 480 m downstream of the ATLAS interaction point, along the beam collision axis. FASER was designed, constructed, installed, and commissioned during 2019-2022 and has been taking physics data since the start of LHC Run 3 in July 2022. This talk will present the status of the experiment, including detector design, detector...
Many extensions of the Standard Model with Dark Matter candidates predict new long-lived particles (LLP). The LHC provides an unprecedented possibility to search for such LLP produced at the electroweak scale and above. The ANUBIS concept foresees instrumenting the ceiling and service shafts above the ATLAS experiment with tracking stations in order to search for LLPs with decay lengths of...
We will present the operational status of the milliQan Run 3 detector, which was installed during the 2022-3 YETS and is presently being commissioned. We will available initial results from data obtained with Run 3 LHC Collisions.
The NA62 experiment at CERN took data in 2016–2018 with the main goal of measuring the $K^+ \rightarrow \pi^+ \nu \bar\nu$ decay. We report on the search for visible decays of exotic mediators from data taken in "beam-dump" mode with the NA62 experiment. The NA62 experiment can be run as a "beam-dump experiment" by removing the Kaon production target and moving the upstream collimators into a...
The parameters space for Weakly-Interacting-Massive-Particles as possible explanation for Dark Matter, is shrinking more and more. This triggered new attempts to create dark matter at accelerators. This alternative approach represents an innovative and open-minded way to broaden this research field in a wider range of energies with high-sensitivity detectors [1].
In this panorama is inserted...
We present the most recent $BABAR$ searches for reactions that could simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts $B$-meson decays into an ordinary-matter baryon and a dark-sector anti-baryon $\psi_D$ with branching fractions accessible at the $B$ factories. The results are based on the full data set of about 430...
In a class of theories, dark matter is explained by postulating the existence of a 'dark sector',
which interacts gravitationally with ordinary matter. If this dark sector contains a U(1) symmetry,
and a corresponding 'dark' photon ($A_{D}$) , it is natural to expect that this particle with kineticly mix
with the ordinary photon, and hence become a 'portal' through which the dark sector can...
CMS searches for dark matter including those with dark portal interactions are presented. Various topologies and kinematic variables are explored. In this talk, we focus on the recent results obtained using the full Run-II dataset collected at the LHC.
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS Collaboration has developed a broad search program for DM candidates in final states with large missing transverse momentum produced in association...
We consider an axion-like particle decaying invisibly at Belle II proposing a nearly background-free search in the $e^+e^-+\text{invisible}$ channel. This search leverages dedicated kinematic variables, whose behaviour and performance we test under a simplified, yet realistic, treatment of detector effects. We find that at the Belle II experiment the $e^+e^-+\text{invisible}$ channel has the...
Belle has unique reach for a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. This talk presents recent world-leading physics results from Belle II searches for dark $Z’$ decays as well as long-lived (pseudo) scalars in $B$ decays.
In the Standard Model, the introduction of a singlet complex scalar field that acquires vacuum expectation value may give rise to a cosmologically stable pseudo-Nambu-Goldstone boson (pNGB); a good dark matter (DM) candidate with novel features at the phenomenological level, such as the reduction of the direct detection signal. This work extends this scenario by including a second cosmological...
Hidden sectors are ubiquitous in supergravity theories, in strings and in branes. Well motivated models such as the Stueckelberg hidden sector model could provide a candidate for dark matter. In such models, the hidden sector communicates with the visible sector via the exchange of a dark photon (dark Z′) while dark matter is constituted of Dirac fermions in the hidden sector. Using data from...
