A5051501677- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Distributed and Parallel Computing Systems
- Black Holes and Theoretical Physics
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- International Science and Diplomacy
- ICT Impact and Policies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- History and advancements in chemistry
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
Durham University
2016-2019
Pittsburgh Supercomputing Center
2019
University of Pittsburgh
2019
Max Planck Society
2019
University of Tübingen
2018
Universidad Autónoma de Madrid
2014-2016
Shimane University
2015-2016
Université Paris-Saclay
2012-2013
Laboratoire de Physique Théorique
2012-2013
Université Paris Cité
2011-2013
In this paper we consider a Higgs boson with mass and other properties compatible those of the recently discovered particle at LHC, explore possibility new leptonic decays, beyond standard model, singular feature being lepton flavor violating (LFV). We study these LFV $H\ensuremath{\rightarrow}{l}_{k}{\overline{l}}_{m}$, within context inverse seesaw model (ISS) most generic case where three additional pairs massive right-handed singlet neutrinos are added to content. require in addition...
A bstract Heavy neutrinos ( N ) remain one of most promising explanations for the ori-gin neutrinos’ tiny masses and large mixing angles. In light broad advances in un-derstanding modeling hadron collisions at momentum transfers, we revisit long-standard search strategy heavy decaying to multiple charged leptons ℓ ), pp → NℓX 3ℓ νX . For electroweak TeV-scale , propose a qualitatively new collider analysis premised on dynamic jet veto discriminating, an event-by-event basis, according...
Taking the supersymmetric inverse seesaw mechanism as explanation for neutrino oscillation data, we investigate charged lepton flavor violation in radiative and 3-body decays well neutrinoless μ − e conversion muonic atoms. In contrast to former studies, take into account all possible contributions: non-supersymmetric. We CMSSM-like boundary conditions soft supersymmetry breaking parameters. find several regions where cancellations between various contributions exist, reducing violating...
We address the impact of a modified $W \ell \nu$ coupling on wide range observables, such as $\tau$ leptonic and mesonic decays, decays pseudoscalar mesons, well semileptonic meson decays. In particular, we concentrate deviations from lepton flavour universality, focusing ratios $R_{P} = \Gamma (P \to \nu) / \ell' \nu)$, with $P=K, \pi, D, D_s$, $R(D)={\Gamma (B^+ D \tau^+ \nu)}/{\Gamma D\ell^+ \nu)}$, $R \tau={\Gamma (\tau\to \mu\nu\nu)}/{\Gamma e\nu\nu)}$, $R^{\ell \tau}_P=\Gamma(\tau\to...
We consider a tree-level enhancement to the violation of lepton flavour universality in light meson decays arising from modified $W \ell \nu$ couplings standard model minimally extended by sterile neutrinos. Due presence additional mixings between active (left-handed) neutrinos and new states, deviation unitarity leptonic mixing matrix intervening charged currents might lead $R_{P} = \Gamma (P \to e \nu) / \mu \nu)$, with $P=K, \pi$. illustrate these enhancements case inverse seesaw model,...
The Compact Linear Collider (CLIC) is a mature option for the future of high energy physics. It combines benefits clean environment $e^+e^-$ colliders with operation at centre-of-mass energies, allowing to probe scales beyond reach Large Hadron (LHC) many scenarios new This places CLIC project privileged spot in between precision and frontiers, capabilities that will significantly extend knowledge on both fronts end LHC era. In this report we review revisit potential search, directly...
In this article, we study the full one-loop SUSY contributions to lepton flavor violating Higgs decay $h\ensuremath{\rightarrow}\ensuremath{\tau}\overline{\ensuremath{\mu}}$, within context of supersymmetric inverse seesaw model. We assume that both right-handed neutrino masses, ${M}_{R}$, and their partner ${m}_{{\stackrel{\texttildelow{}}{\ensuremath{\nu}}}_{R}}$, are not far from interesting $\mathcal{O}(\mathrm{TeV})$ energy scale, work with scenarios large Yukawa couplings transmit...
In this letter we study new relevant phenomenological consequences of the right-handed heavy neutrinos with masses at ${\cal O}(1)$ TeV energy scale, working within context Inverse Seesaw Model that includes three pairs quasi-degenerate pseudo-Dirac neutrinos. We propose a exotic signal these CERN Large Hadron Collider containing muon, tau lepton, and two jets in final state, which is based on interesting fact model can incorporate large Lepton Flavor Violation for specific choices...
A bstract In minimal supersymmetric models the Z -penguin usually provides sub-dominant contributions to charged lepton flavour violating observables. this study, we consider inverse seesaw in which non-minimal particle content allows for dominant of several particular, and due low-scale (TeV) seesaw, penguin contribution to, instance, Br( μ → 3 e ) − conversion nuclei, render some these observables within future sensitivity reach. Moreover, show that framework, exhibits same non-decoupling...
We discuss the most general necessary and sufficient condition for three massless light neutrinos in variants of type I seesaw mechanism which we introduce an arbitrary number fermionic gauge singlets. find that having is equivalent to enforcing conservation lepton number. As a consequence, any symmetry leads will contain as unbroken subgroup conserved This be important searches heavy sterile since neutrino masses proportional small violating parameters also suppress signatures.
We discuss weak kaon decays in a scenario which the Standard Model is extended by massive sterile fermions. After revisiting analytical expressions for leptonic and semileptonic we derive decay rates with two neutrinos final state. By using simple effective model only one neutrino, compatible all current experimental bounds general theoretical constraints, conduct thorough numerical analysis reveals that impact of presence on very small, less than 1% rates. The exception...
Central jet vetoes are powerful tools for reducing QCD background in measurements and searches electroweak colorless, new physics processes hadron collisions. In this letter, we report the key findings of a philosophy to designing such phenomena at colliders, one designed centered around dynamical veto instead static applied independently other selection criteria. Specifically, investigate theoretical phenomenological consequences setting scale transverse momentum $(p_T)$ leading charged...
A bstract We study the impact of inverse seesaw mechanism on several low-energy flavour violating observables such as τ → μμμ in context Minimal Supersymmetric Standard Model. As a consequence seesaw, contributions right-handed sneutrinos significantly enhance Higgs-mediated penguin diagrams. find that different branching ratios can be enhanced by much two orders magnitude. also comment processes leptonic B -meson decays and Higgs decays.
The Future Circular Collider (FCC) at CERN, a proposed 100-km circular facility with several colliders in succession, culminates 100 TeV proton-proton collider. It offers vast new domain of exploration particle physics, orders magnitude advances terms Precision, Sensitivity and Energy. implementation plan foresees, as first step, an Electroweak Factory electron-positron This high luminosity facility, operating between 90 365 GeV centre-of-mass energy, will study the heavy particles Standard...
The measure of the triple Higgs coupling is one major goals high-luminosity run CERN Large Hadron Collider (HL-LHC) as well future colliders, either leptonic such International Linear (ILC) or hadronic 100 TeV Future Circular in hadron-hadron mode (FCC-hh). We have recently proposed this observable a test neutrino mass generating mechanisms regime where heavy sterile masses are hard to be probed otherwise. present article study one-loop corrected inverse seesaw model, taking into account all...
There have been some recent claims in the literature about large right-handed sneutrinos contributions to lepton flavor violating observables like $\ensuremath{\mu}\ensuremath{\rightarrow}3e$ or $\ensuremath{\mu}\ensuremath{-}e$ conversion nuclei supersymmetric low-scale seesaw models. These originate from $Z$-penguin diagrams which show a much weaker dependence on heavy masses than photonic contributions. We traced this an error evaluation of corresponding loop amplitudes has propagated...
We present the first calculation of one-loop corrections to triple Higgs coupling in framework a simplified $3+1$ Dirac neutrino model, that is three light neutrinos plus one heavy embedded Standard Model (SM). The key parameter scalar potential triggering electroweak symmetry-breaking mechanism SM. impact can be as large $+20%$ $+30%$ for points allowed by current experimental constraints depending on tightness perturbative bound. This probed at high-luminosity LHC, future electron-positron...
One of the interesting properties NMSSM is that it can accommodate a light pseudoscalar order 10 GeV. However, such scenarios are challenged by several experimental constraints, especially those related to fermionic decays pseudoscalar. In this Letter, we extend field content two gauge singlets, with lepton numbers +1 and −1. This serves twin purpose generating neutrino masses via inverse seesaw mechanism keeping option very experimentally viable opening dominant invisible decay channels...
In this doctoral thesis, we study both low- and high-energy observables related to massive neutrinos. Neutrino oscillations have provided indisputable evidence in favour of non-zero neutrino masses mixings. However, the original formulation Standard Model cannot account for these observations, which calls introduction new Physics. Among many possibilities, focus here on inverse seesaw, a mass generation mechanism is extended with fermionic gauge singlets. This model offers an attractive...
We present the first study of production a Standard Model Higgs boson at lepton collider in association with pair W bosons, $$e^+_{} e^-_{} \rightarrow W^+_{} W^-_{} H$$ , inverse seesaw model. Taking into account all relevant experimental and theoretical constraints, we find sizable effects due to additional heavy neutrinos up $$-38\%$$ on total cross-section center-of-mass energy 3 TeV, even $$-66\%$$ suitable cuts. This motivates detailed sensitivity analysis process as it could provide...
In the inverse seesaw model (ISS), smallness of neutrino masses is related to a lepton number violating mass term whilst scale naturally close TeV scale, which allows for large effects in flavor and universality observables. With ongoing planned measurements Higgs boson properties at LHC, we found timely investigate possibility having decay (LFVHD) rates within context ISS, considering most generic case where three additional pairs massive right-handed singlet neutrinos are added Standard...