A5085231123- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Noncommutative and Quantum Gravity Theories
- Spacecraft Design and Technology
- Satellite Communication Systems
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Space exploration and regulation
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Astronomy and Astrophysical Research
- Radiomics and Machine Learning in Medical Imaging
- Algebraic structures and combinatorial models
- Particle accelerators and beam dynamics
- Plant biochemistry and biosynthesis
- Scientific Research and Discoveries
- DNA and Nucleic Acid Chemistry
- Space Science and Extraterrestrial Life
- Quantum Information and Cryptography
Indian Institute of Science Bangalore
2012-2024
Institut de Physique Théorique
2016
Union City Public Schools
2015
École Polytechnique
2005-2007
Institute of Mathematical Sciences
2006-2007
Centre de Physique Théorique
2005-2007
Centre de Physique Théorique
2005-2007
Centre National de la Recherche Scientifique
2005-2007
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2002-2005
University of Padua
2002-2005
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...
We update the constraints on two-Higgs-doublet models (2HDMs) focusing parameter space relevant to explain present muon g −2 anomaly, Δa μ , in four different types of models, type I, II, "lepton specific" (or X) and "flipped" Y). show that strong provided by electroweak precision data mass pseudoscalar Higgs, whose contribution may account for are evaded regions where charged scalar is degenerate with heavy neutral one mixing angles α β satisfy Standard Model limit − ≈ π/2. combine...
Isolated ideal neutron stars (NS) of age $>{10}^{9}\text{ }\text{ }\mathrm{yr}$ exhaust thermal and rotational energies cool down to temperatures below $\mathcal{O}(100)\text{ }\mathrm{K}$. Accretion particle dark matter (DM) by such NS can heat them up through kinetic annihilation processes. This increases the surface temperature a maximum $\ensuremath{\sim}2550\text{ }\mathrm{K}$ in best case scenario. The accretion rate depends on DM ambient density velocity dispersion, equation state...
We analyze the complementarity between lepton flavor violation (LFV) and LHC experiments in probing supersymmetric (SUSY) grand unified theories (GUT) when neutrinos get a mass via seesaw mechanism. Our analysis is performed an SO(10) framework, where at least one neutrino Yukawa coupling necessarily as large top coupling. study thoroughly takes into account whole renormalization group running, including GUT right-handed scales, well running of observable spectrum. find that upcoming (MEG,...
In spite of the large lepton flavour violation (LFV) observed in neutrino oscillations, within Standard Model, we do not expect any visible LFV charged sector (μ → e, γ, τ μ, etc). On contrary, presence new physics close to electroweak scale can enhance amplitudes these processes. We discuss this general and focus on a particularly interesting case: marriage low-energy supersymmetry (SUSY) seesaw mechanism for masses (SUSY seesaw). Several ideas presented context are reviewed both bottom-up...
We revisit the constraints on parameter space of Minimal Supersymmetric Standard Model (MSSM), from charge and color breaking minima in light information Higgs LHC so far. study behavior scalar potential keeping two sfermion fields along with pMSSM framework analyze stability vacuum. find that for lightest stop $\lesssim 1$ TeV small $\mu \lesssim 500$ GeV, absolute can be attained only $|X_{t}| \sqrt{ 6 m_{\tilde{t}_1} m_{\tilde{t}_2}}$. The bounds become stronger larger values $\mu$...
A bstract We provide the corrected calculation of ( g − 2) μ in non-local QED previously done literature. In specific, we show proper technique for calculating loops and use it to find form factors F 1 q 2 ) QED. also utilize this calculate some novel results QED, including correction photon self-energy, modification classical Coulomb potential, energy levels hydrogen atom, contribution Lamb shift. discuss charge dequantization through non-locality, that experimental bounds on electric Dirac...
In the context of supersymmetric grand unified theories with soft breaking terms arising at Planck scale, it is generally possible to link flavor changing neutral current and CP violating processes occurring in leptonic hadronic sectors. We study correlation between squark slepton mass insertions models à la SU(5). show that constraints coming from lepton violation exhibit a strong impact on CP-violating B decays.
The neutrino mass spectrum is reanalyzed in supersymmetric models with explicit trilinear R violation. Models this category are argued to provide simultaneous solutions the solar and atmospheric anomalies. It shown specifically that large mixing hierarchical masses needed for vacuum solution of anomalies arise naturally these without requiring any additional symmetries or hierarchies among couplings.
We investigate the generation of small neutrino masses in a clockwork framework which includes Dirac mass terms as well Majorana for new fermions. derive analytic formulas particles and their Yukawa couplings to lepton doublets, scenario where parameters are universal. When universal vanishes, zero mode sector forms pair with active neutrino, is agreement oscillations experiments sufficiently large number gears. On other hand, when it does not vanish, generated via seesaw mechanism. In this...
Lepton masses and mixing angles via localization of 5-dimensional fields in the bulk are revisited context Randall-Sundrum models. The Higgs is assumed to be localized on IR brane. Three cases for neutrino considered: (a) higher-dimensional mass operator (LH.LH), (b) Dirac masses, (c) Type I seesaw with Majorana terms. Neutrino as well charged lepton fit first two using ${\ensuremath{\chi}}^{2}$ minimization parameters, while varying $\mathcal{O}(1)$ Yukawa couplings between 0.1 4. flavor...
A bstract We look for minimal extensions of Standard Model with vector like fermions leading to precision unification gauge couplings. Constraints from proton decay, Higgs stability and perturbativity are considered. The simplest models contain several copies in two different (incomplete) representations. Some these encompass Type III seesaw mechanism neutrino masses whereas some others have a dark matter candidate. In all the models, at least one candidates has non-trivial representation...
Abstract We propose a renormalization scheme for non-local Quantum Field Theories (QFTs) with infinite derivatives inspired by string theory. Our Non-locality Renormalization Scheme (NRS) is Dimensional Regularization (DR) in local QFTs and shown to significantly improve the UV behavior of QFTs. illustrate using simple examples from $$\phi ^{3}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>ϕ</mml:mi> <mml:mn>3</mml:mn> </mml:msup> </mml:math> ^{4}$$...
In spite of the enormous success Standard Model (SM), we have strong reasons to expect presence new physics beyond SM at higher energies. The idea Grand Unification all known interactions in nature is perhaps main reason behind these expectations. Low-energy Supersymmetry closely linked with grand unification as a solution hierarchy problem associated ratio M_GUT / M_Z. lectures will provide general overview and special emphasis on their phenomenological consequences low We analyse flavour...
We present upto date electroweak fits of various Randall Sundrum (RS) models. consider the bulk RS model, deformed and custodial For case we find lightest Kaluza Klein (KK) mode gauge boson to be $\sim 8$ TeV while for it is 3$ TeV. The model least fine tuned all which can give a good fit KK masses $< 2$ depending on choice parameters. also comment tuning in each case.
The patterns of R violation resulting from the imposition a gauged U(1) horizontal symmetry on minimal supersymmetric standard model are systematically analyzed. We concentrate class models with integer charges chosen to reproduce quark masses and mixings as well charged lepton exactly or approximately. further restricted by requirement that very large bilinear number violating terms should not be allowed in superpotential. It is shown this leads severely constrained trilinear interactions....