A5019969490- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- High-Energy Particle Collisions Research
- Scientific Research and Discoveries
- Computational Physics and Python Applications
- Radiation Therapy and Dosimetry
- CCD and CMOS Imaging Sensors
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Galaxies: Formation, Evolution, Phenomena
- Radioactive Decay and Measurement Techniques
- Advanced Thermodynamics and Statistical Mechanics
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Advanced Data Storage Technologies
- Advanced X-ray Imaging Techniques
- Quantum and Classical Electrodynamics
- Psychology Research and Bibliometrics
Technical University of Munich
2015-2024
Max Planck Institute for Physics
2022
Korea Institute for Advanced Study
2017-2020
Excellence Cluster Universe
2017
Deutsches Elektronen-Synchrotron DESY
2007-2009
Consejo Superior de Investigaciones Científicas
1999-2007
Universidad Autónoma de Madrid
2005-2007
European Organization for Nuclear Research
2003-2005
University of Oxford
2001-2003
Instituto de Estructura de la Materia
1999-2001
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 present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, particle physics in each case viewed both theoretical experimental/observational perspectives. After reviewing the role active neutrinos physics, we focus on context Matter puzzle. Here, first motivation for based challenges tensions purely cold scenarios. then round out discussion by critically summarizing known...
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...
A commonly encountered obstacle in indirect searches for galactic dark matter is how to disentangle possible signals from astrophysical backgrounds. Given that such are most likely subdominant, the search pronounced spectral features plays a key role detection experiments; monochromatic gamma-ray lines or similar related internal bremsstrahlung, particular, provide smoking gun signatures. We perform dedicated latter data taken by Fermi space telescope during its first 43 months. To this end,...
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 The invisible decay of cold dark matter into a slightly lighter sector particle on cosmological time-scales has been proposed as solution to the S 8 tension. In this work we discuss possible embedding scenario within physics framework, and investigate its phenomenology. We identify minimal setup that addresses tension, while avoiding stringent constraints from indirect searches. our scenario, contains two singlet fermions N 1,2 , quasi-degenerate in mass, carrying lepton number so...
The AMS-02 Collaboration has recently presented high-quality measurements of the cosmic electron and positron fluxes as well fraction. We use flux to derive, for first time, limits on dark matter annihilation cross section lifetime various final states. Working under well-motivated assumption that a background exists from spallations rays with interstellar medium astrophysical sources, we find strong properties which are competitive, although slightly weaker, than those derived Specifically,...
Astrophysical and cosmological observations do not require the dark matter particles to be absolutely stable. If they are indeed unstable, their decay into positrons might occur at a sufficiently large rate allow indirect detection of through an anomalous contribution cosmic positron flux. In this paper we discuss implications excess in fraction recently reported by PAMELA collaboration for scenario decaying matter. To end, have performed model-independent analysis possible signatures...
We discuss the future prospects of heavy neutrino searches at next generation lepton colliders. In particular, we focus on planned electron-positron colliders, operating in two different beam modes, namely, $e^+e^-$ and $e^-e^-$. mode, consider various production decay modes ($N$), find that final state with $e+2j+{E\!\!\!/}_T$, arising from $e^+e^-\to N\nu$ is most promising channel. However, since this mode insensitive to Majorana nature neutrinos, also study a new channel Ne^\pm W^\mp$,...
We study a type I see-saw scenario where the right-handed (RH) neutrinos, responsible for light neutrino mass generation, lie at electroweak scale. Under certain conditions, strength of charged and neutral current weak interactions Standard Model particles with heavy RH neutrinos can be large enough to allow their production LHC, opening also possibility observing other low energy signatures new physics in precision observables as well searches rare leptonic decays or neutrinoless double...
Numerous observations point towards the existence of an unknown elementary particle with no electromagnetic interactions, a large population which was presumably produced in early stages history Universe. This so-called dark matter has survived until present day, accounting for 26% energy budget It remains open question whether particles comprising are absolutely stable or they have finite but very long lifetime, is possibility since there known general principle guaranteeing perfect...
Using a new sample of extremely metal poor systems, the EMPRESS survey has recently reported primordial helium abundance that is $3\sigma$ smaller than prediction from standard big bang nucleosynthesis (BBN) scenario. This measurement could be interpreted as hint for lepton asymmetry in electron neutrino flavor. Motivated by results, we present comprehensive analysis using measurements abundances elements, along with cosmic microwave background (CMB) data Planck. Assuming there no dark...
The flux of high energy neutrinos and photons produced in a blazar could get attenuated when they propagate through the dark matter spike around central black hole halo host galaxy. Using observation by IceCube few high-energy neutrino events from TXS 0506+056, their coincident gamma ray events, we obtain new constraints on matter-neutrino matter-photon scattering cross sections. Our are orders magnitude more stringent than those derived considering attenuation intergalactic medium Milky Way...
We study the prospects for detecting gamma-rays from decaying dark matter (DM), focusing in particular on gravitino DM R-parity breaking vacua. Given substantially different angular distribution of predicted gamma-ray signal with respect to case annihilating DM, and relatively poor (of order 0.1°) resolution detectors, best strategy detection is this look an exotic contribution flux at high galactic latitudes, where would resemble astrophysical extragalactic component, similar one inferred...
Gravitinos are very promising candidates for the cold dark matter of Universe. Interestingly, to achieve a sufficiently long gravitino lifetime, R parity conservation is not required, thus preventing any dangerous cosmological influence next-to-lightest supersymmetric particle. When violated, gravitinos decay into photons and other particles with lifetime much longer than age Universe, producing diffuse gamma-ray flux characteristic spectrum that could be measured in future experiments, such...
The observation of a sharp spectral feature in the gamma-ray sky would be one cleanest ways to identify dark matter and pinpoint its properties. Over years lot attention has been paid two specific features, namely lines internal bremsstrahlung. Here, we explore third class signatures, box-shaped spectra, that naturally arise cascade annihilations or decays into intermediate particles turn decay photons. Using Fermi-LAT data, derive constraints on parameter space for both annihilating...
Three main strategies are being pursued to search for non-gravitational dark matter signals: direct detection, indirect detection and collider searches. Interestingly, experiments have reached sensitivities in these three which may allow the near future. In order take full benefit of wealth experimental data, confirm a possible signal, it is necessary specify nature particle mediator Standard Model. this paper, we focus on simplified model where Majorana fermion that couples light Model via...