I explore the impact of dimension-6 operators within the Standard Model Effective Field Theory (SMEFT) framework on the Drell–Yan process. SMEFT provides a systematic and model-independent approach to searching for signs of physics beyond the Standard Model, based on the inclusion of higher dimensions operators. I focus on four-fermion interactions, examining their helicity amplitudes, their...
The talk will cover an exploration on the dilepton plus missing transverse energy (MET) signature from LHC to search for two-component scalar Dark Matter (DM). The model discussed in this work is a 3-Higgs Doublet Model (3HDM) where two of the doublets are inert from the Standard Model (SM) and the other one is active and also the SM Higgs doublet, hence a I(2+1)HDM. Each inert sector will...
The decay time resolution is crucial for the determination of CP asymmetries in the time-dependent B0→D±π∓ analysis. In this measurement the decay time resolution was investigated using a sample of reconstructed "fake" B0 candidates selected from the LHCb Run 2 data. A mass fit was performed to suppress the background, and the transverse momentum of the
B0 meson was used to map the data to...
The NOvA (NuMI Off-Axis electron neutrino Appearance) Experiment is a long-baseline neutrino oscillation experiment composed of two functionally identical detectors, a 300 ton Near Detector, and a 14 kton Far Detector separated by 810 km and placed 14 mrad off the axis of the NuMI neutrino beam created at Fermilab. This configuration enables NOvA’s rich neutrino physics program, which includes...
Recently, the notion of symmetry descent has been introduced in order to obtain the (d+1)-dimensional Symmetry TFT (SymTFT) of a d-dimensional QFT from the edge mode behaviour of a theory in (d+2)-dimensions. This method has so far been used to obtain SymTFTs for discrete higher-form symmetries of geometrically engineered QFTs. In this note, we extend the symmetry descent procedure to obtain...
In 1983, Chandrasekhar calculated that the ringdown spectrum of a perturbed black hole (BH) is identical regardless of perturbation type (isospectrality). While this 'coincidence' was proven mathematically its physical origin remains mysterious. After the detection of Gravitational waves and BH ringdowns by LIGO (GW150914) this mystery is now directly relevant for BH observations.
In this...
Long baseline atom interferometers, such as the AION-10 device currently being planned in Oxford, show promise as methods of detecting both unltralight dark matter, gravitational waves and other potential astrophysical signals. However, the readings from these instruments are very noisy due to the impact of gravity gradient noise from the external environment. This work aims to characterise this noise.
Dark Matter in X-rays: Revised XMM-Newton Limits and New Constraints from eROSITA
We investigate two classes of dark matter (DM) candidates, sub-GeV particles and primordial black holes (PBHs), that can inject low-energy electrons and positrons into the Milky Way and leave observable signatures in the X-ray sky. In the case of sub-GeV DM, annihilation or decay into e+e-
contributes to the...
Content Scalar-tensor theories of gravity are a class of modified gravity models that extend general relativity by introducing a scalar field coupling to curvature terms in the action. These theories aim to address fundamental problems in cosmology, such as explaining the nature of dark matter and the origin of the Universe’s accelerated expansion. The models have been thoroughly tested, and a...
