Katri Huitu
A5104387352- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- International Science and Diplomacy
- Superconducting Materials and Applications
- Space Science and Extraterrestrial Life
- Radioactive Decay and Measurement Techniques
- Algebraic structures and combinatorial models
- Superconducting and THz Device Technology
- Particle accelerators and beam dynamics
- Noncommutative and Quantum Gravity Theories
- Quantum Mechanics and Non-Hermitian Physics
- Nuclear physics research studies
- Cryptography and Residue Arithmetic
Helsinki Institute of Physics
2016-2025
University of Helsinki
2016-2025
Indian Statistical Institute
2019
Indian Association for the Cultivation of Science
2010-2019
John Wiley & Sons (Germany)
2015
Izmir Institute of Technology
2008-2010
Concordia University
2008-2010
Deutsches Elektronen-Synchrotron DESY
2008
Leiden University
1998
University of Southern California
1990-1993
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC foreseen to be built and operated in staged approach with three centre-of-mass energy stages ranging from few hundred GeV up 3 TeV. first stage will focus on precision Standard Model physics, particular Higgs top-quark measurements. Subsequent measurements rare processes, as well searches for new processes states, e.g. states...
The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear $e^+e^-$ collider under development at CERN. Following the CLIC conceptual design published in 2012, this report provides an overview of project, its current status, and future developments. It presents physics potential reports on design, technology, implementation aspects accelerator detector. foreseen to be built operated stages, centre-of-mass energies 380 GeV, 1.5 TeV 3 TeV, respectively. uses two-beam acceleration...
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...
Sodium iodide (NaI)-based cryogenic scintillating calorimeters using quantum sensors for signal readout have shown promising first results toward a model-independent test of the annually modulating detected by DAMA/LIBRA dark matter experiment. The COSINUS Collaboration has previously reported on above-ground measurements dual-channel phonons and light based transition edge (TESs) that allows particle discrimination an event-by-event basis. In this article, we outline underground measurement...
We explore possible signatures for right-handed neutrinos in a TeV scale B-L extension of the standard model at Large Hadron Collider. The studied four lepton signal has tiny background. find experimentally accessible LHC considered parameter regions.
The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics. experiment consists of a far detector, its first stage 20 kt LAr double phase TPC magnetised iron calorimeter, situated at 2300 km from CERN near detector based on highpressure argon gas TPC. long baseline provides unique opportunity to study flavour oscillations over their 1st 2nd oscillation maxima exploring L/E behaviour, distinguishing...
In this article we investigate the prospects for probing strength of possible non-standard neutrino interactions (NSI) in long baseline oscillation experiments. We find that these experiments are sensitive to NSI couplings down level 0.01-0.1 depending on channel and length, as well detector's fiducial mass. also interference leptonic CP angle $\delta_{CP}$ with constraining couplings. It is found strong case $\nu_{e}\leftrightarrow\nu_{\mu}$ $\nu_{e}\leftrightarrow\nu_{\tau}$ transitions...
Pseudo-Goldstone dark matter coupled to the Standard Model via Higgs portal offers an attractive framework for phenomenologically viable pseudo-scalar matter. It enjoys natural suppression of direct detection rate due vanishing relevant (tree level) Goldstone boson vertex at zero momentum transfer, which makes light WIMP-like consistent with strong current bounds. In this work, we explore prospects detecting pseudo-Goldstone LHC, focusing on vector fusion (VBF) channel missing energy. We...
We report on the status of efforts to improve reinterpretation searches and measurements at LHC in terms models for new physics, context Reinterpretation Forum. detail current experimental offerings direct particles, measurements, technical implementations Open Data, provide a set recommendations further improving presentation results order better enable future. also brief description existing software frameworks recent global analyses physics that make use data.
The COSINUS direct dark matter experiment situated at Laboratori Nazionali del Gran Sasso in Italy is set to investigate the nature of annually modulating signal detected by <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>DAMA</a:mi><a:mo>/</a:mo><a:mi>LIBRA</a:mi></a:mrow></a:math> experiment. has already demonstrated that sodium iodide crystals can be operated mK temperature as cryogenic scintillating calorimeters using transition edge sensors, despite...
Direct detection of light dark matter can be significantly enhanced by upscattering with energetic particles in the cosmic ambient. This boosted flux reach kinetic energies up to tens MeV, while typical GeV mass Milky Way halo are order keV. Dark diffuse supernova background neutrinos detected only through nuclear or electron scattering ground-based detectors requiring a nonzero interaction nucleon electron, addition its neutrino. However, presence matter-nucleon (electron) interaction, rays...
A bstract In the so-called 331-models gauge anomalies cancel only if there are three generations of fermions. This requires one quark to be in a different representation than other two. But which generation is treated differently? this work we study how choice differently effects flavour structure and discriminated can deduced from experiments. We general model based on $$ \beta =-1/\sqrt{3} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>β</mml:mi> <mml:mo>=</mml:mo>...
Abstract While neutrinos are often treated as a background for many dark matter experiments, these particles offer new avenue physics: the detection of core-collapse supernovae. Supernovae extremely energetic, violent and complex events that mark death massive stars. During their collapse stars emit large number in short burst. These carry 99% emitted energy which makes fundamental understanding This paper illustrates how COSINUS (Cryogenic Observatory SIgnatures seen Next-generation...
ATLAS and CMS have reported an excess in the flavor violating decay of Higgs boson, h → μτ . We show that this result can be accommodated through a mixing with flavon, field responsible for generating Yukawa matrices lepton sector. employ version Froggatt-Nielsen mechanism at electroweak scale, only leptons flavon transforming non-trivially under corresponding symmetry group. Non-observation charged violation (LFV) other processes imposes important constraints on model, which we find to...
We study contributions coming to $Δm_B$ from one or more universal extra dimensions (UED) in which all the Standard Model fields can propagate. In model with a single UED, box diagrams for mixing are convergent and therefore insensitive cutoff scale of theory. case two UEDs, result is not very sensitive cut-off due GIM mechanism. Within present range parameters at $1 σ$ level, lower bound on compactification 1/R has been estimated be 165 GeV UED 280 UEDs. The increases drastically if have...
We study the resonance production of radions and Higgs via gluon–gluon fusion in Randall–Sundrum model with Higgs-curvature mixing at LHC. find that radion can be detected both mixed (with boson) unmixed case if vacuum expectation value Λ φ is around 1 TeV. The ∼10 TeV also promising for certain values parameters masses. affect decay boson a significant way. Thus search strategies LHC may need refinements radion-Higgs model.
We study single top production in association with a charged Higgs the type II two doublet model at Large Hadron Collider. The polarization of top, reflected angular distributions its decay products, can be sensitive probe new physics production. present theoretically expected polarizations for charged-Higgs production, which is significantly different from that closely related process tW Standard Model. then show an azimuthal asymmetry, constructed lepton distribution laboratory frame, and...
We study multi-lepton signatures of the triplet like charged Higgs at LHC in context Y = 0 extended supersymmetric model (TESSM). In TESSM h ± W ∓ Z coupling appears tree level when vacuum expectation value is nonzero, and because decay channels as well production can dramatically change LHC. show that for dominated main are no longer through top or gg gb fusions since these very suppressed due to lack triplet-SM fermion coupling. numerical analysis, we consider also other possible some...
We study phenomenological aspects of supersymmetric SU(5) grand unified theories with non-universal gaugino masses. For large tan beta, we investigate constraints from the requirement successful electroweak symmetry breaking, positivity stau mass squared and b to s gamma decay rate. In allowed region, nature lightest particle is determined. Examples spectra are given. also calculate loop corrections bottom due superpartners.