A5112456189- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- International Science and Diplomacy
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Biofield Effects and Biophysics
- Superconducting Materials and Applications
- Pulsars and Gravitational Waves Research
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Space Science and Extraterrestrial Life
- Astrophysics and Cosmic Phenomena
- Advanced Thermodynamics and Statistical Mechanics
- German Literature and Culture Studies
- Advanced Frequency and Time Standards
- Earth Systems and Cosmic Evolution
European Organization for Nuclear Research
2015-2024
Istituto Nazionale di Geofisica e Vulcanologia
2016
International Solvay Institutes
2014
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
1992-1998
Sapienza University of Rome
1997
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
1997
Stanford University
1996
The University of Texas at Austin
1991-1992
Florida State University
1992
Fermi National Accelerator Laboratory
1989-1991
A bstract We present the first complete next-to-next-to-leading order analysis of Standard Model Higgs potential. computed two-loop QCD and Yukawa corrections to relation between quartic coupling ( λ ) mass M h ), reducing theoretical uncertainty in determination critical value for vacuum stability 1 GeV. While at Planck scale is remarkably close zero, absolute potential excluded 98 % C.L. < 126 Possible consequences near vanishing scale, including speculations about role field during...
A bstract We extract from data the parameters of Higgs potential, top Yukawa coupling and electroweak gauge couplings with full 2-loop NNLO precision, we extrapolate SM up to large energies 3-loop RGE precision. Then study phase diagram Standard Model in terms high-energy parameters, finding that measured mass roughly corresponds minimum values quartic maximum value allowed by vacuum metastability. discuss various theoretical interpretations near-criticality mass.
The thermal history of the universe before epoch nucleosynthesis is unknown. maximum temperature in radiation-dominated era, which we will refer to as reheat temperature, may have been low 0.7 MeV. In this paper show that a has important implications for many topics cosmology. We weakly interacting massive particles (WIMP's) be produced even if much smaller than freeze-out WIMP, and dependence present abundance on mass annihilation cross section WIMP differs drastically from familiar...
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
We examine $R$-parity-breaking interactions with lepton-number violation in the minimal supergravity model and obtain new stringent bounds on coupling constants from low-energy processes. discuss decay of lightest supersymmetric particle analyze possible signatures for $R$-parity-violating $W$, $Z$, Higgs-boson decays, ${e}^{+}{e}^{\ensuremath{-}}$ collisions.
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV measured properties compatible those Standard-Model Higgs boson, coupled absence discoveries phenomena beyond Standard Model at TeV scale, has triggered interest in ideas for future factories. A circular e+e- collider hosted 80 to 100 km tunnel, TLEP, is among most attractive solutions proposed so far. It clean experimental environment, produces high luminosity top-quark, W Z studies, accommodates multiple...
We assume the validity of standard model up to an arbitrary high-energy scale and discuss what information on early stages Universe can be extracted from a measurement Higgs mass. For , potential develop instability at large-field values. From absence excessive thermal field fluctuations we derive bound reheat temperature after inflation as function top masses. Then interplay between quantum generated during primordial stage cosmological perturbations, in context landscape scenarios which...
A bstract We show how a heavy scalar singlet with large vacuum expectation value can evade the potential instability of Standard Model electroweak vacuum. The quartic interaction between and Higgs doublet leads to positive tree-level threshold correction for coupling, which is very effective in stabilizing potential. provide examples, such as see-saw, invisible axion unitarized inflation, where proposed mechanism automatically implemented well-defined ranges masses.
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
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 Standard Model Higgs potential becomes unstable at large field values. After clarifying the issue of gauge dependence effective potential, we study cosmological evolution in presence this instability throughout inflation, reheating and present epoch. We conclude that anti-de Sitter patches which lies its true vacuum are lethal for our universe. From result, derive upper bounds on Hubble constant during depend temperature coupling to scalar curvature or inflaton. Finally how a speculative...