The High Luminosity LHC will be a tremendous opportunity to search for long lived particles (LLPs) from an extended hidden/dark sector, feebly connected to the known SM sector. Such LLP searches will require special detectors, placed far away from the proton-proton collision point and shielded against SM backgrounds. The CODEX-b detector, to be placed behind a thick shielding wall inside the...
We suggest a new class of models - Fermionic Portal Vector Dark Matter (FPVDM) which extends the Standard Model (SM) with SU(2)_D dark gauge sector. While FPVDM does not require kinetic mixing and Higgs portal. It is based on the Vector-Like (VL) fermionic doublet which couples the dark sector with the SM sector through the Yukawa interaction. The FPVDM framework provides a vector Dark Matter...
t has been proposed that, in the large radius compactification (LRC) scenario, the Kaluza-Klein states might be considered as dark matter (DM) candidates. The universal extra dimension (UED) hypothesis, together with the LRC paradigm, holds the prospect of observing KK states at LHC if masses lie in the accessible LHC energy scale. If observed, they might be possible DM candidates, provided...
Anti-quark nuggets, AQNs, (ZHITNITSKY, 2003), have been suggested to solve the dark matter (DM) and the missing antimatter problem in the universe, and have been proposed as an explanation of various observations.
Their size is in the μm range and their density equal to the nuclear density with an expected flux of about 1 / km2 / year. For the typical velocity of DM constituents (~250...
The MoEDAL-MAPP experiment at Run-3 incorporates the MoEDAL and MAPP-1 (MoEDAL Apparatus for Penetrating Particles) detectors deployed at IP8 and in the UA83 tunnel on the LHC Ring, respectively. The passive, triggerless, MoEDAL detector has been taking data at Run-1 and Run-2 and is a world leader in the direct search for Highly Ionizing Particles (HIPs) at a Collider. HIP avatars of new...
In this talk, I will review the importance of "Gauge invariance" in the search for Dark matter at the High Energy Collider including LHC.
The major topics I will include will be
1) The limit of effective field theory / simplified model approach at the High Energy collider
2) Dark matter showering at the High Energy collider
We explore the parameter space of the phenomenological Minimal Supersymmetric Standard Model (pMSSM) with a light neutralino thermal dark matter (M ̃χ01 ≤ Mh/2) that is consistent with current collider and astrophysical constraints. We identify that a narrow region with light Higgsinos having masses between 125-160 GeV survives the present constraints for the μ < 0 scenario, including the...
Dark matter bound states may exist within the dark sector, characterized by a substantial dark force. Depending on the spins and parity properties of the force carriers, Standard Model particles may primarily couple with either the lowest or excited bound states. We discuss the associated collider signatures at the LHC for various simplified models.
The 2HDMa model is one of the main models used in the Dark Matter searches at the LHC. So far, all the 2HDMa benchmarks used by the LHC experiments feature a Type-II Yukawa sector with degenerate Higgses ($m_A=m_H=m_{H^{\pm}}$). The latter implies, together with the fact that flavour observables put lower bounds on the mass of the charged Higgses, that the $A/H/H^{\pm}$ bosons are all...
We present a review of the models used for the search for a new leptonically decaying neutral vector boson in association with missing transverse energy by ATLAS, which was published as a conference note (ATLAS-CONF-2023-045) in August 2023. Three signal regions were defined as bins in the $\text{E}_\text{T}^{\text{miss}}$ significance, and the search was performed by scanning across the...
In this talk we will present the reinterpretation of the CMS emerging jets (that is, long-lived dark pions belonging to a strongly interacting dark sector), published in JHEP 01 (2024) 034 (arXiv:207.04847) and will show that particularly this search can set meaningful bounds on scenarios where the SM Higgs boson mediates between the visible and dark sectors. In particular we find that for...
After the first round of SVJ experimental results, the focus has shifted to exploring more specific topologies, as well as attempts to design more sensitive observables. In this presentation, we will cover an exploratory study of SVJs produced preferentially with bottom quarks, including looking at the sensitivity from current public results. The advantage of using variable radius jets will be...
The Hidden Valley scenario consists of a set of models where the Standard Model is accompanied by a Hidden Sector and connected with it via a heavy mediator or a weak coupling. If realised in nature, the Hidden Valley scenario may result in unusual and little-studied phenomena at the LHC. Under the assumption of a QCD-like confining dark sector, novel experimental signatures emerge,...
Singlet-Triplet Fermionic Model ($\nu$STFM) with an extended fermion and Higgs sector is a well motivated model which explains both neutrino masses and dark matter (DM). Two of the triplet $\rho_{1,2}$ and singlet fermionic fields $N_{1,2}$ contribute to neutrino mass generation via seesaw mechanism, while, the remaining triplet $\rho_3$ and singlet $N_3$ fields are the constituents of the...
Searching for absorbed fermionic dark matter by nuclei is being taken more and more
attention. In stead of the energy recoil signal at direct detection experiments, dark matter
appears always as missing energy at high energy colliders. For such a fermionic
dark matter, its production is always accompanied by an invisible neutrino.
Mono-X (photon, jet and $Z$ boson) productions are...
The existence of a new type of non-baryonic matter in the Universe, also called Dark Matter (DM), is supported by compelling astrophysical and cosmological evidence. Considerations on its measured relic density favour the hypothesis that Dark Matter is composed primarily of Weakly Interacting Massive Particles (WIMPs). Unfortunately, numerous experiments targeting the detection of these DM...
Recasting is an extremely powerful tool to derive limits on new physics
models. With so many NP models at our disposal, recasting makes it easy to use the limits derived on certain models by experimental searches, to
constrain any model of our choice. However, this method can fail, if
the model of our interest not only differs from the one it is being
recasted from, in terms of event...
The MoEDAL-MAPP experiment at Run-3 incorporates the MoEDAL and MAPP-1 (MoEDAL Apparatus for Penetrating Particles) detectors deployed at IP8 and in the UA83 tunnel on the LHC Ring, respectively. The passive, triggerless, MoEDAL detector has been taking data at Run-1 and Run-2 and is a world leader in the direct search for Highly Ionizing Particles (HIPs) at a Collider. HIP avatars of new...
