A5032349566- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Noncommutative and Quantum Gravity Theories
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Scientific Research and Discoveries
- Quantum Electrodynamics and Casimir Effect
- Neutrino Physics Research
- Nuclear Physics and Applications
- Biofield Effects and Biophysics
- Superconducting Materials and Applications
- Geomagnetism and Paleomagnetism Studies
- Radio Astronomy Observations and Technology
- Blind Source Separation Techniques
- Geophysics and Gravity Measurements
- Atomic and Subatomic Physics Research
- Advanced Data Processing Techniques
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Topological Materials and Phenomena
- Earth Systems and Cosmic Evolution
- Robotic Path Planning Algorithms
Ludwig-Maximilians-Universität München
2013-2023
Max Planck Institute for Physics
2013-2023
European Organization for Nuclear Research
1996-2013
New York University
1998-2013
The Abdus Salam International Centre for Theoretical Physics (ICTP)
1991-1998
Integrative Clinical Trials
1998
Georgian National Academy of Sciences
1992-1995
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
1995
University of Pisa
1995
Institute of Physics
1990-1991
We propose a new framework for solving the hierarchy problem which does not rely on either supersymmetry or technicolor. In this framework, gravitational and gauge interactions become united at weak scale, we take as only fundamental short distance scale in nature. The observed weakness of gravity distances ≳ 1 mm is due to existence n≥2 compact spatial dimensions large compared scale. Planck MPl∼GN−1/2 scale; its enormity simply consequence size dimensions. While gravitons can freely...
We address the issue of whether extra dimensions could have an infinite volume and yet reproduce effects observable four-dimensional gravity on a brane. There is no normalizable zero-mode graviton in this case, nevertheless correct Newton's law can be obtained by exchanging bulk gravitons. This interpreted as exchange single {\it metastable} 4D graviton. Such theories remarkable phenomenological signatures since evolution Universe becomes high-dimensional at very large scales. Furthermore,...
We propose a new solution to the cosmological monopole problem in which domain walls sweep away magnetic monopoles and subsequently decay. The does not require extensive fine tuning or model building - it works for prototype SU(5) Grand Unification model. More generally, shows that defect interactions can lead ``defect erasure'' phase transitions this be relevant early universe physics.
Abstract Recently within the context of a microscopic quantum theory, Black Hole's Quantum N‐Portrait , it was shown that continuous global symmetries are compatible with black hole physics. In present paper we revise same framework semi‐classical bound on number particle species N . We show unlike charge, survives in picture and gives rise to new fundamental length‐scale, L = √( ) P beyond which resolution identities is impossible. This finding nullifies so‐called problem. scale sets size...
This report, prepared for the Community Planning Study - Snowmass 2013 summarizes theoretical motivations and experimental efforts to search baryon number violation, focussing on nucleon decay neutron-antineutron oscillations. Present future experiments using large underground detectors, as well planned oscillation with free neutron beams are highlighted.
We show that simple strongly coupled supersymmetric gauge theories with quantum moduli spaces can naturally lead to hybrid inflation. These contain no input dimensionful or small parameters. The effective superpotential is linear in the inflaton field; this ensures supergravity corrections do not spoil slow roll conditions for construct a theory which classical space exhibits neither GUT-symmetry-breaking nor inflation whereas its modification both. As result, dynamical origin and scales of...
In some instances of study quantum evolution classical backgrounds it is considered inevitable to resort nonperturbative methods at the price treating system semiclassically. We show that a fully perturbative treatment, in which background resolved as multiparticle state, recovers semiclassical results and allows going beyond. reproduce particle creation by field theory two scalars well scalar QED terms scattering processes high multiplicity. The treatment also gives transparent picture why...
There is an ongoing debate on how seriously one should take the naturalness puzzles as guidelines to new physics. In this gravity often put aside, insignificant spectator force. However, attitude misses entire essence of story. Through its <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>S</mml:mi> </mml:math> -matrix formulation, promotes certain puzzles, such cosmological constant and strong- <mml:mi>C</mml:mi> <mml:mi>P</mml:mi> problems, into consistency issues. The...
The color-triplet partner of the Higgs doublet, called a $T$-particle, is universal feature Grand Unification. It has been shown some time ago that this particle can be accessible for direct production in collider experiments. In paper we point out $T$-particle represents simultaneous low-energy probe baryon number violation as well origin neutrino mass, linking mediation proton decay with oscillations neutron into sterile neutrino. We triple correlation between its signatures, measurements...
To deepen our understanding of Quantum Gravity and its connections with black holes cosmology, building a common language exchanging ideas across different approaches is crucial. The Nordita Program "Quantum Gravity: from gravitational effective field theories to ultraviolet complete approaches" created platform for extensive discussions, aimed at pinpointing both grounds sources disagreements, the hope generating driving progress in field. This contribution summarizes twelve topical...
Supersymmetric flat directions allow a generic counterexample to the phenomenon of symmetry restoration at high temperatures. We show that (exponentially) large VEVs can be developed along these through temperature-induced `dimensional transmutation'. A minimum with broken gauge charges (e.g. electric charge) exist arbitrarily In such scenario magnetic monopoles are never formed, independent whether inflation occurs before or after GUT phase transition, it all.
In this lecture we shall briefly review some motivations for physics beyond the Standard Model. We focus our attention on hierarchy problem and discuss role of gravity in defining solving problem. 1 Motivation Model Fundamental is about understanding laws Nature at different length scales. Let me give examples important ones. The Hubble length, LH ∼ 1028 cm, which represents size (and age) observable Universe, is, by default, largest observed Nature. Another Lexp.gr 0.2 mm, shortest down to...