Stefano Moretti
A5034676393- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Distributed and Parallel Computing Systems
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Game Theory and Voting Systems
- Game Theory and Applications
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- International Science and Diplomacy
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Auction Theory and Applications
- Gene expression and cancer classification
University of Southampton
2016-2025
Uppsala University
1999-2025
Rutherford Appleton Laboratory
2014-2024
Inner Mongolia Normal University
2023-2024
Institute of High Energy Physics
2023-2024
Cadi Ayyad University
2022-2024
Abdelmalek Essaâdi University
2020-2024
Chinese Academy of Sciences
2023-2024
University of Chinese Academy of Sciences
2023-2024
National Taiwan University
2023-2024
We examine the theoretical motivations for long-lived particle (LLP) signals at LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are common prediction wide range theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, represent natural generic possibility physics beyond SM (BSM). In most cases LLP lifetime can be treated free parameter from $\mu$m scale up to Big Bang Nucleosynthesis limit $\sim 10^7$m....
Abstract A comprehensive extension of the ordinary 2-Higgs Doublet Model (2HDM), supplemented by vector-like quarks (VLQs), in “alignment limit” is presented. In such a scenario, we study possibility that large hadron collider (LHC) searches for VLQs can profile their nature too, i.e., whether they belong to singlet, doublet, or triplet representation. To achieve this, exploit both standard model (SM) decays with top-(anti)quark electromagnetic (EM) charge ( T ), into b , t and $$W^\pm Z,h$$...
We present the Large Hadron Collider (LHC) discovery potential in ${Z}^{\ensuremath{'}}$ and heavy neutrino sectors of a $U(1{)}_{B\ensuremath{-}L}$ enlarged standard model also encompassing 3 Majorana neutrinos. This exhibits novel signatures at LHC, most interesting arising from decay chain involving neutrinos, eventually decaying into leptons jets. In particular, this signature allows one to measure masses involved. addition, over large region parameter space, neutrinos are rather...
We make a comprehensive study of the theory and phenomenology low energy supersymmetric standard model originating from string-inspired $E_6$ grand unified gauge group. The Exceptional Supersymmetric Standard Model (ESSM) considered here is based on SM group together with an extra $Z'$ corresponding to $U(1)_{N}$ symmetry under which right--handed neutrinos have zero charge. matter content ESSM corresponds three 27 representations group, ensure anomaly cancellation, plus additional pair...
We present the activities of `New Physics' working group for `Physics at TeV Colliders' workshop (Les Houches, France, 5--23 June, 2017). Our report includes new physics studies connected with Higgs boson and its properties, direct search strategies, reinterpretation LHC results in building viable models computational tool developments.
The Higgs boson of the Standard Model is being searched for at LHC in channel $H\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$. In Triplet (HTM), there are contributions to this decay from loops doubly charged scalars (${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}$) and singly (${H}^{\ifmmode\pm\else\textpm\fi{}}$) which not present Model. These additional mediated by trilinear couplings ${H}_{1}{H}^{++}{H}^{--}$ ${H}_{1}{H}^{+}{H}^{\ensuremath{-}}$, where...
The goal of this report is to summarize the current situation and discuss possible search strategies for charged scalars, in non-supersymmetric extensions Standard Model at LHC. Such scalars appear Multi-Higgs-Doublet models (MHDM), particular popular Two-Higgs-Doublet model (2HDM), allowing additional neutral Higgs bosons. These have attractive property that electroweak precision observables are automatically agreement with tree level. For most version framework, Model~II, a discovery boson...
Abstract The workshop “Shedding light on X17” brings together scientists looking for the existence of a possible new particle, often referred to as X17. This hypothetical particle can explain resonant structure observed at $$\sim $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>∼</mml:mo> </mml:math> 17 MeV in invariant mass electron-positron pairs, produced after excitation nuclei such $$^8\hbox {Be}$$ <mml:mrow> <mml:msup> <mml:mrow /> <mml:mn>8</mml:mn> </mml:msup>...
A bstract We suggest an explanation for and explore the consequences of excess around 95 GeV in di-photon di-tau invariant mass distributions recently reported by CMS collaboration at Large Hadron Collider (LHC), together with discrepancy that has long been observed Electron-Positron (LEP) collider $$ b\overline{b} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>b</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> mass. Interestingly, most recent findings...
A bstract We deploy an advanced Machine Learning (ML) environment, leveraging a multi-scale cross-attention encoder for event classification, towards the identification of gg → H hh $$ b\overline{b}b\overline{b} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>b</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> process at High Luminosity Large Hadron Collider (HL-LHC), where h is discovered Standard Model (SM)-like Higgs boson and heavier version it (with m...
We study the phenomenology of charged Higgs bosons (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>H</a:mi><a:mo>±</a:mo></a:msup></a:math>) and vectorlike quarks (VLQs), denoted as <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>T</c:mi></c:math>, latter possessing a charge identical to top quark one, within framework two-Higgs-doublet model type II (2HDM-II). Upon examining two scenarios, one featuring singlet (<e:math...