A5073429051- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Neutrino Physics Research
- Particle Detector Development and Performance
- Advanced Data Storage Technologies
- Black Holes and Theoretical Physics
- Plant Stress Responses and Tolerance
- Atomic and Subatomic Physics Research
- Plant Water Relations and Carbon Dynamics
- Biotechnology and Related Fields
- Greenhouse Technology and Climate Control
- Distributed and Parallel Computing Systems
- Wireless Power Transfer Systems
- Neuroendocrine Tumor Research Advances
- Neonatal Health and Biochemistry
- Radio Frequency Integrated Circuit Design
- Fault Detection and Control Systems
- Photosynthetic Processes and Mechanisms
- Astrophysics and Cosmic Phenomena
- DNA and Nucleic Acid Chemistry
- Nuclear physics research studies
Centre National de la Recherche Scientifique
2012-2024
Laboratoire d'Annecy-le-Vieux de Physique Théorique
2014-2024
Université Savoie Mont Blanc
2013-2024
Université Grenoble Alpes
2008-2022
Infineon Technologies (United States)
2018
Deutsches Elektronen-Synchrotron DESY
2011-2013
University of Münster
2013
Karlsruhe Institute of Technology
2013
Laboratoire de Physique Subatomique et de Cosmologie
2007-2013
Université Joseph Fourier
2007-2013
A bstract We examine the Inert Doublet Model in light of discovery a Higgs-like boson with mass roughly 126 GeV at LHC. evaluate one-loop corrections to scalar masses and perform numerical solution renormalization group equations. Demanding vacuum stability, perturbativity, S -matrix unitarity, we compute scale up which model can be extrapolated. From this derive constraints on parameters presence Higgs boson. an improved calculation dark matter relic density fixed measured value, taking...
Searches in final states with two leptons plus missing transverse energy, targeting supersymmetric particles or invisible decays of the Higgs boson, were performed during Run 1 LHC. Recasting results these analyses context inert doublet model (IDM) using MadAnalysis 5, we show that they provide constraints on scalars significantly extend previous limits from LEP. Moreover, LHC allow us to test IDM limit very small Higgs--inert scalar coupling, where direct detection dark matter and width vanish.
We present the activities of "New Physics" working group for "Physics at TeV Colliders" workshop (Les Houches, France, 3--21 June, 2013). Our report includes new computational tool developments, studies implications Higgs boson discovery on physics, important signatures searches natural physics LHC, flavour aspects and assessments interplay between direct dark matter LHC.
We present the electroweak spectrum for Next-to-Minimal Supersymmetric Standard Model at one-loop level, e.g.\ masses of Higgs bosons, sleptons, charginos and neutralinos. For numerical evaluation we a mSUGRA variant with non-universal mass parameters squared compare our results existing ones in literature. Moreover, briefly discuss implications calculation relic density.
We compute the full O(alpha_s) supersymmetric QCD corrections for neutralino-stop co-annihilation into electroweak gauge and Higgs bosons in Minimal Supersymmetric Standard Model (MSSM). show that these annihilation channels are phenomenologically relevant within so-called phenomenological MSSM, particular light of observation a Higgs-like particle with mass about 126 GeV at LHC. present detail our calculation, including renormalization scheme, infrared treatment, kinematical subtleties to...
Abstract We present DM@NLO , a Fortran 77 based program with C++ interface dedicated to precision calculations of dark matter (DM) (co)annihilation cross-sections and elastic matter-nucleon scattering amplitudes in the minimal supersymmetric (SUSY) Standard Model (MSSM) at next-to-leading order (NLO) perturbative QCD. If annihilating initial particles carry an electric or colour charge, Sommerfeld enhanced cross section is included as well can be matched NLO section. review these including...
This chapter of the "Flavor in era LHC" workshop report discusses flavor-related issues production and decays heavy states at LHC high momentum transfer Q, both from experimental theoretical perspective. We review top quark physics, discuss flavor aspects several extensions standard model, such as supersymmetry, little Higgs models or with extra dimensions. includes discovery aspects, well measurement properties these states. also present publicly available computational tools related to this topic.
We discuss the $\mathcal{O}({\ensuremath{\alpha}}_{s})$ supersymmetric QCD corrections to neutralino-stop coannihilation into a top quark and gluon in minimal Standard Model (MSSM). This particular channel can be numerically important wide ranges of MSSM parameter space with rather light stops. technical details such as renormalization scheme phase-space slicing method two cutoffs. also comment on improvements respect earlier works given process. Further, we study for first time...
We compute the full $\mathcal{O}({\ensuremath{\alpha}}_{s})$ supersymmetric (SUSY)-QCD corrections for neutralino annihilation into massive quarks through gauge or Higgs bosons and squarks in minimal standard model, including known resummation of logarithmically enhanced terms. The numerical impact on extraction SUSY mass parameters from cosmological data is analyzed gravity-mediated SUSY-breaking scenarios shown to be sizable, so that these must included common analysis tools.
For particle physics observables at colliders such as the LHC CERN, it has been common practice for many decades to estimate theoretical uncertainty by studying variations of predicted cross sections with a priori unpredictable scales. In astroparticle physics, this so far not possible, since most were calculated Born level only, that renormalization scheme and scale dependence could be studied in meaningful way. paper, we present first quantitative study neutralino dark matter relic density...
We present the full $\mathcal{O}({\ensuremath{\alpha}}_{s})$ supersymmetric QCD corrections for stop-antistop annihilation into electroweak final states within Minimal Supersymmetric Standard Model. also incorporate Coulomb due to gluon exchange between incoming stops. Numerical results cross sections and predicted neutralino relic density are presented. show that impact of radiative on cosmologically preferred region parameter space can become larger than current experimental uncertainty,...
We compute the full $\mathcal{O}({\ensuremath{\alpha}}_{s})$ SUSY-QCD corrections to dark matter annihilation in Higgs-funnel, resumming potentially large $\ensuremath{\mu}\mathrm{tan}\ensuremath{\beta}$ and ${A}_{b}$ contributions keeping all finite $\mathcal{O}({m}_{b},s,1/{tan}^{2}\ensuremath{\beta})$ terms. demonstrate numerically that these strongly influence extraction of SUSY mass parameters from cosmological data must therefore be included common analysis tools such as darksusy or micromegas.
We describe in detail our calculation of the full supersymmetric QCD corrections to neutralino annihilation into heavy quarks and extend numerical analysis resulting dark matter relic density scenarios without scalar or gaugino mass unification. In these scenarios, final state is often composed top proceeds through ${Z}^{0}$-boson top-quark exchanges. The impact again shown be sizable, so that they must taken account systematically global analyses supersymmetry parameter space.
We present an extensive analysis of gauge-mediated supersymmetry breaking models with minimal and non-minimal flavour violation. first demonstrate that low-energy, precision electroweak, cosmological constraints exclude large "collider-friendly" regions the parameter space. then discuss various possibilities how violation, although naturally suppressed, may still occur in gauge-mediation models. The introduction violation at electroweak scale is shown to relax stringent experimental...
We present the full $\mathcal{O}(\alpha_s)$ supersymmetric QCD corrections for gaugino annihilation and co-annihilation into light heavy quarks in Minimal Supersymmetric Standard Model (MSSM). demonstrate that these channels are phenomenologically relevant within so-called phenomenological MSSM. discuss selected technical details such as dipole subtraction method case of treatment bottom quark mass Yukawa coupling. Numerical results (co-)annihilation cross sections predicted neutralino relic...
Abstract We examine the capacity of Large Hadron Collider to determine mean proper lifetime long-lived particles assuming different decay final states. mostly concentrate on high luminosity runs LHC, and therefore, develop our discussion in light amount pile-up various upgrades for HL-LHC runs. employ model-dependent model-independent methods order reconstruct neutral decaying into displaced leptons, potentially accompanied by missing energy, as well charged ihnto leptons energy. also...
We study the effect of squark generation mixing on production and decays at LHC in Minimal Supersymmetric Standard Model (MSSM). show that can be very large despite strong constraints quark-flavour violation (QFV) from experimental data B mesons. find two lightest up-type squarks u˜1,2 have branching ratios for into cχ˜10 tχ˜10 same time due to mixing, leading QFV signals ‘pp→ct¯(tc¯)+missing-ET+X’ with a significant rate. The observation this remarkable signature would provide powerful test...
A bstract We present a detailed study of scotogenic model accommodating dark matter, neutrino masses and the anomalous magnetic moment muon while being consistent with existing constraints on flavour violating decays leptons. Moreover, this offers possibility to explain baryon asymmetry Universe via leptogenesis. determine viable regions model’s parameter space in view matter using Markov Chain Monte Carlo setup combined particular procedure accommodate at same time. also discuss briefly...
The resurrection plant Myrothamnus flabellifolia has the ability to recover from repeated prolonged and extreme desiccation cycles. During dry state inner walls of xylem vessels seemed be covered, at least partly, by a lipid film as shown Sudan III Nile Red staining. apparently functioned an ‘internal cuticle’ which prevented adjacent parenchyma ray cells complete water loss. hydrophobic nature was supported finding that benzene ascended rapidly in branches. On watering, numerous bodies were...
We discuss the possibility of new sources flavor violation in squark sector supersymmetric models context dark matter relic density. show that corresponding nonminimal terms mass matrices can have an important impact on thermally averaged (co)annihilation cross section neutralino, and consequence modify its predicted detail relevant effects present a numerical study neutralino annihilation coannihilation this context. also comment LHC phenomenology scenarios.
In minimal anomaly-mediated supersymmetry breaking models, tachyonic sleptons are avoided by introducing a common scalar mass similar to the one introduced in supergravity. This may lead non-minimal flavour-violating interactions, e.g., squark sector. this paper, we analyze viable parameter space light of latest limits on low-energy observables and LHC searches, complete our analytical calculations supersymmetric particle production at hadron colliders with those related gluino production,...
We study the effect of squark generation mixing on gluino production and decays at LHC in Minimal Supersymmetric Standard Model (MSSM) for case that is lighter than all squarks dominantly into three particles, $gl -> q qbar neut_k, gl qbar' char_l$. assume between second third generations up-type down-type sectors. show this can lead to very large branching ratios quark-flavour violating three-body despite strong constraints violation (QFV) from experimental data B mesons. also QFV decay are...
We study quark flavour violation (QFV) in the squark sector of Minimal Supersymmetric Standard Model (MSSM). assume mixing between second and third generations, i.e. sc_R-st_{L,R} mixing. focus on QFV effects bosonic decays, particular decay into lightest Higgs boson h0, su_2 -> su_1 where su_{1,2} are up-type squarks. show that branching ratio this can be quite large (up to 50 %) due trilinear couplings, sc_R-st_{L, R} st_L-st_R mixing, despite strong constraints from B meson data. This...
We investigate couplings of squarks to gauge and Higgs-bosons within the framework non-minimal flavour violation in Minimal Supersymmetric Standard Model. Introducing non-diagonal elements mass matrices squarks, we first study their impact on self-energies physical eigenvalues squarks. then present an extensive analysis bosonic squark decays for variations flavour-violating parameters around two benchmark scenarios SPS1a' SPS1b. Signatures, that would be characteristic a structure sector,...