The nature of dark matter is one of the long-standing open questions in modern cosmology. While many different experimental methods are being explored, a clear signature for particle dark matter is yet to be found. In indirect searches, the final state particles of decaying or self-annihilating dark matter could be observed with existing astro-particle experiments. Due to their small cross-section, neutrinos are able to escape from dense environments such as the Sun or the Earth which makes them unique messengers for dark matter searches. The IceCube neutrino telescope has a diverse program on dark matter searches exploring different source regions and possible mass-ranges. Furthermore, various models such as decaying, annihilating or secluded dark matter are studied.

XMASS is a multi-purpose experiment using a single-phase liquid-xenon scintillator detector located underground at Kamioka Observatory in Japan. The primary aim is to detect dark matter signal. We have taken data from November 2013 to February 2019, for more than five years. With this long-term data, we have conducted not only dark matter searches, but also various researches in particle and astroparticle physics. We report standard WIMPs, annual modulation, hidden photons and axio-like particles, and exotic neutrinos searches. No significant signals are observed in these searches.

Axions and Axion-like particles (ALPs) are light pseudo-scalar particles predicted in many theoretically well-motivated extensions to the standard model of particle physics (SM). The search for cold dark matter (CDM) ALPs has gained tremendous ground over the last few years. Essentially, ALPs are characterized by their coupling with two photons which allows axions to decay into pairs of photons. In this work, we explore the potential of the Square Kilometer Array (SKA) to detect CDM ALPs with radio astronomy in an attempt to detect an observational signature of ALPs conversion onto photons in astrophysical field.

Poincare breaking scale causes explicit gauge invariance breaking at the loop level in the standard model (SM) – a renormalizable QFT in flat spacetime. In this talk, we show that gauge invariance can be restored by extending the general covariance by a covariance relation for curvature such that this extended covariance carries effective QFTs into curved spacetime to lead up to QFT-GR reconciliation, with renormalized QFTs and emergent GR. This mechanism predicts the existence of new physics beyond the SM (BSM), and does not necessitate the BSM sector to have any non-gravitational coupling with the SM. The BSM sector can have a dark subsector comprising the dark matter, dark energy, and other possible SM-singlet fields.

Velocity distribution of dark matter is assumed to be isotropic in most cases, however, anisotropy is suggested in some simulations. Directional direct detection of dark matter is a hopeful way to discriminate the anisotropy of dark matter velocity distribution. We simulate the dark matter and target scattering in the directional direct detection, and investigate conditions required to discriminate the anisotropy. If dark matter mass is known, $O(10^3) - O(10^4)$ events are required for the discrimination if the dark matter mass is known by other experiments. We also study the case that the dark matter mass is not known, and in analysis using both the recoil energy and the scattering angle data, both the dark matter mass and the anisotropy can be restricted much better than the analysis only with either of them.

We discuss the possibility that inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. Imposing an R-symmetry allows to satisfy easily the slow-roll conditions, avoiding the so-called $\eta$-problem, and leads to an interesting class of small field inflation models, characterised by an inflationary plateau around the maximum of the scalar potential near the origin, where R-symmetry is restored with the inflaton rolling down to a minimum describing the present phase of the Universe. Inflation can be driven by either an F- or a D-term, while the minimum has a positive tuneable vacuum energy. The models agree with cosmological observations and in the simplest case predict a rather small tensor-to-scalar ratio of primordial perturbations.

Thermal inflation, a brief low energy inflation after the primordial inflation, resolves the moduli problem in the context of supersymmetric cosmology. In the thermal inflation scenario, the primordial power spectrum is modestly redshifted on large scales, but suppressed by a factor of 1/50 on scales smaller than the horizon size at the beginning of thermal inflation. We compare the thermal inflation model with the warm dark matter and LCDM scenarios by studying CMB spectral distortions, halo abundances, and 21cm hydrogen lines.

The flavor problem is reviewed starting with the chiral symmetry, and the $A_4$ symmetry derivation and its realization in GUTs are presented.

We propose models for neutrino masses and mixing in the framework of low scale $U(1)_{L_\mu -L_\tau}$ gauge extension of the standard model. The models are designed to spontaneously break $U(1)_{L_\mu -L_\tau}$ so that the $U(1)_{L_\mu -L_\tau}$ gauge boson acquires an MeV scale mass, which is required to solve the long-standing problem of muon anomalous magnetic moment.

Lepton flavor-dependent $U(1)$ gauge symmetries give strong constraints on the neutrino Dirac and Majorana mass matrices, and, in the cases of some kinds of $U(1)$s, the mass matrix for the light neutrinos have some zero elements. We study the minimal extensions of the Standard Model by a linear combination of $U(1)_{L_e -L_\mu}$, $U(1)_{L_\mu -L_\tau}$ and $U(1)_{B-L}$ gauge symmetries, which realizes the two-zero minor or texture structure in the mass matrix for the active neutrinos. Analyzing these structures of the neutrino mass matrix, we obtain the predictions for the neutrino parameters, such as the neutrino masses and Dirac CP phase. In addition, we also discuss the implication of our results for leptogenesis.

Neutrinos can scatter off dark matter as they travel through the cosmos to reach the Earth. These interactions can alter neutrino spectrum at IceCube. We explore the possibility of changes in the neutrino spectrum as neutrino interact with the dark matter by considering various neutrino-dark matter interactions. In this context, interaction via light vector mediators are particularly interesting as they can lead to dip and cut-off like features in the neutrino spectrum at IceCube. We illustrate that various models of AGN, which predict more flux than the observed at IceCube, can be resolved through this mechanism. We have the scope to test such interactions in the upcoming detectors, e.g., IceCube- Gen2, GRAND, KM3NeT, etc.

We construct the self-complementary (SC) neutrino mixing pattern from the SC relation plus $\delta_{CP}=-\frac{\pi}{2}$ and show that the indicated effective neutrino mass matrix has to be constructed perturbatively. We build an $S_4$ model for neutrino masses and mixings based on the SC neutrino mixing pattern. After performing a numerical study on the model’s parameter space, we find that the model is phenomenologically viable in the case of normal ordering, and it gives predictions for the not-yet observed quantities like the lightest neutrino mass $m_1 \in [0.003,0.010]$ eV and the Dirac CP violating phase $\delta_{CP} \in [256.72^\circ,283.33^\circ ]$, which can be tested in the future experiments.

Many theories beyond the Standard Model (BSM) predict new phenomena at the highest energies accessible by the LHC. Several searches for new resonances have been performed by the ATLAS and CMS experiments. This paper presents results using 13TeV $pp$ data collected during Run 2 by the ATLAS and CMS experiments.

Magnetic monopoles are predicted by many quantum field theories. Non-minimal dark sectors may well includesuchparticles.Ishowhowdarkmagneticmonopolescanhavesmall,perturbative,couplingstothe visible sector, and how they might make up a portion of the observed dark matter. I clarify how such dark monopoles can be detected experimentally, including novel effects in Aharonov-Bohm phase detectors.

We discuss low scale implications of a class of SUSY GUTs with non-universal SSB masses and confront them with the current experimental results from the direct detection of dark matter experiments, as well as the collider experiments of different center of mass energies. This class of SUSY GUTs are expected to be tested soon in direct detection dark matter experiments through the scatterings of Higgsino and Wino-like dark matters at nuclei. Besides, the stop and gluino will be able to be probed and tested up to about 5-6 TeV in the current and future collider experiments. These probe scales are expected to be further when high luminosities are achieved.

Dark matter (DM) is usually assumed to be stabilized by a symmetry, which is mostly considered to be Z2. For example, in supersymmetry it is R parity, i.e. $(-1)^{3B+L+2j}$. . However, it may be $Z_n$ or $U(1)_D$, and derivable from generalized lepton number. In this context, neutrinos may be Majorana or Dirac, and owe their existence to dark matter, i.e. they are scotogenic.

n this talk, we reexamine the minimal Singlet + Triplet Scotogenic Model, where dark matter is the mediator of neutrino mass generation. We assume it to be a scalar WIMP, whose stability follows from the same $\mathbb{Z}_2$ symmetry that leads to the radiative origin of neutrino masses. We performed a full numerical analysis of the signatures expected at dark matter as well as collider experiments.

In this work, we discuss two component fermionic FIMP dark matter (DM) in a popular $B -L$ extension of the standard model (SM) with inverse seesaw mechanism. Due to the introduced $\mathbb{Z}_2 $ discrete symmetry, a keV SM gauge singlet fermion is stable and can be a warm DM candidate. Also, this $\mathbb{Z}_2 $ symmetry helps the lightest right-handed neutrino, with mass of order GeV, to be a long-lived or stable particle by choosing a corresponding Yukawa coupling to be very small. Firstly, in the absence of a GeV DM component (i.e., without tuning its corresponding Yukawa coupling), we consider only a keV DM as a single component DM produced by the freeze-in mechanism. Secondly, we study a two component FIMP DM scenario and emphasize that the correct ballpark DM relic density bound can be achieved for a wide parameter space.

Supersymmetry relates neutrinos with their superpartners, sneutrinos. Unlike neutrinos, sneutrinos may decay visibly in colliders. We discuss how we could get information from neutrino Yukawa couplings in the NMSSM extended with right- handed neutrinos, if the right-handed sneutrinos are within the reach of the colliders.

We consider the possibility that thermalized dark-matter particles acquire their mass thanks to the spontaneous breaking of a symmetry below some critical temperature. We describe the regime where a freeze out mechanism takes place shortly after the onset of the phase transition, while the dark-matter mass has not yet reached its final constant value. For such a “spontaneous freeze out” to yield the correct relic density, the present-time cross section of annihilation of the dark matter into Standard-Model states has to be one or two orders of magnitude larger than in the case of a constant dark-matter mass.

In the context of the $SU(3)_c \bigotimes SU(3)_L \bigotimes U(1)_X \bigotimes U(1)_N (3-3-1-1)$ extension of the standard model, we show how the spontaneous breaking of the gauge symmetry gives rise to a residual symmetry which accounts for dark matter stability and small neutrino masses in a scotogenic fashion. As a special feature, the gauge structure implies that one of the light neutrinos is massless and, as a result, there is a lower bound for the $0\upsilon \beta\beta$ decay rate.

Motivated by the null results of the BSM searches in the post-Higgs era of the LHC, our current approach is to look for new physics shifting from theory driven search strategies to signature driven ones. One possible direction might come from investigating the long-lived particles (LLP’s) present in various theoretical scenarios through the newly formed “Lifetime frontier”. In this talk, I discuss a non-sterile right-handed neutrino model consisting of EW-scale Majorana masses, having signals with large displaced vertices arising in both the fermion and scalar sectors.The characteristic features in this model, the displaced vertices, i.e. several charged tracks originating from a position separated from the proton interaction point has to be greater than a mm and can be as long as order of centimeters. These events originating from the decays of the mirror fermions produce promising signatures at the LHC environment due to the low associated backgrounds. We discuss the experimental implications and possible search strategies in this framework and LHC’s potential to unravel these underlying events.

The electroweak monopole in the standard model and it’s physical implications are discussed. It could generate the hitherto unknown magnetic current which has unlimited practical applications. Moreover, in cosmology it could generate the primordial magnetic black holes which might explain the dark matter, become the seed of the large scale structures of the universe, and be the source of the intergalactic magnetic field. Most importantly, if detected, it becomes the first magnetically charged and stable topological elementary particle in the history of physics.

The existence of Dark Matter (DM) in the Universe is supported by cosmological and astrophysical evidences. Observations indicate that DM is non-baryonic, non-relativistic and not subject to electromagnetic interactions, but its nature is still unknown. A hypothesis can be based on the idea that DM is “secluded” from Standard Matter particles and that the annihilation is only possible through a metastable mediator. Neutrino telescopes may be efficient tools to test Secluded Dark Matter (SDM) models, such as dark photon models, by means of different searches in the Sun, Earth and Galactic Center. In this work, searches for SDM in neutrino telescopes are discussed, especially the analysis done of the 79-string IceCube public data to test SDM models. In this analysis no significant excess over background is observed and constraints on the parameters of the models are derived. The analysis is also used to constrain the dark photon model.

We present new results of measurements of reactor antineutrino flux and spectrum dependence on the distance in the range 6-12 meters from the center of the reactor core at SM-3 reactor (Dimitrovgrad, Russia). Additional measurements were carried out and set of data to perform statistical analysis was almost doubled since the previous report. Using all collected data, we performed the model independent analysis on the oscillation parameters $\Delta m^2_{14}$ and $\sin^2 2\theta_{14}$. The method of coherent summation of results of measurements allows us to directly observe the effect of oscillations. We observed an oscillation effect at CL 3.0$\sigma$ in vicinity of $\Delta m^2_{14}\approx 7.25eV^2$ and $\sin^2 2θ_{14} \approx 0.26 \pm 0.08(3.0\sigma)$. We provide a comparison of our results with results of other experiments on search for sterile neutrino. Combining the result of the Neutrino-4 experiment and the results of measurements of the gallium anomaly and reactor anomaly we obtained value $sin^2 2θ_{14}\approx 0.19 \pm 0.04(4.6\sigma)$.

Relic axions generated after cosmic inflation may have a mass of around 100 µeV. While being excellent candidates for cold dark matter, axions in this mass range are seldom covered by existing research based on resonant RF cavities. The dielectric haloscope is a promising alternative technique for the search of dark matter axions in this mass range. The MADMAX collaboration tries to build a dielectric haloscope that is sensitive to post-inflationary QCD axions. The principle, current status, and future plans of the MADMAX experiment are presented.

We present current constraints on neutrino mass and mixing parameters in the context of the three-neutrino framework. We use data from both oscillation and non-oscillation experiments.

After the experimental discovery of neutrino oscillations, solar neutrino physics is about to enter the precision era. I will present the current experimental results on the fluxes of the different components of the solar neutrino spectrum in the context of the physics of neutrino oscillation and the proton fusion processes in the Sun. The perspectives of measuring neutrinos produced in the carbon-nitrogen-oxygen (CNO) fusion cycle in the Sun and the role of BOREXINO experiment will also be discussed.

Direct detection of dark matter is the ultimate goal of experimental physics. NOvA Near detector may be capable to put an upper limit on the lightweight dark matter (LDM) particle production, in the 120-GeV proton-nucleus collisions, engaged in producing the high-intensity NuMI neutrino beam. We summarize the approach used in the search for the elastic, dark matter - electron scattering in the Near Detector, and briefly mention two other efforts to observe the elusive dark matter interactions, with the NOvA detectors.

The ANTARES underwater neutrino telescope has been operating for more than twelve years with a successful and wide physics program, which will be broadened by the KM3NeT infrastructure, currently under construction in the Mediterranean Sea. The two configurations of KM3NeT, ARCA offshore Sicily (IT) and ORCA offshore Toulon (FR), will investigate the high-energy astrophysical neutrino landscape, and perform precision measurements of oscillation parameters with atmospheric neutrinos. ARCA is designed to have excellent angular resolution and a very large volume, instrumenting 1 km$^3$ of water. ORCA is optimised for detection in the $\gtrsim$ 3 GeV energy range with a dense geometry. The two detectors share the same technology and data access philosophy, being modular units of a unique infrastructure. Results and perspectives in neutrino astrophysics searches (steady and transient sources, multimessenger programs and diffuse astrophysical neutrino fluxes), in neutrino oscillation research, in indirect dark matter detection, and in sea and Earth science will be presented.

MicroBooNE is the first phase of Fermilab’s Short Baseline Neutrino (SBN) Liquid Argon Time Projection Chamber (LArTPC) programme. It aims to improve the understanding of the observed excess of low-energy electromagnetic events at MiniBooNE. The current status of the low-energy excess search in MicroBooNE is presented.