A5044956091- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Noncommutative and Quantum Gravity Theories
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Galaxies: Formation, Evolution, Phenomena
- Particle Accelerators and Free-Electron Lasers
- Information Technology Governance and Strategy
- Business Process Modeling and Analysis
- Education, Psychology, and Social Research
- Technology Adoption and User Behaviour
- E-Government and Public Services
- Advanced NMR Techniques and Applications
- Particle accelerators and beam dynamics
- Fault Detection and Control Systems
University of Southampton
2016-2025
Cranfield University
2022-2024
Centro Científico Tecnológico de Valparaíso
2020
University of Leeds
1997-2020
Federico Santa María Technical University
2020
Tepatitlán's Institute for Theoretical Studies
2017-2019
Indian Institute of Technology Kanpur
2019
Center for Theoretical Physics
2017-2019
University of Southern Denmark
2013
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2013
This is a review article about neutrino mass and mixing flavour model building strategies based on discrete family symmetry. After pedagogical introduction overview of the whole physics, we focus PMNS matrix latest global fits following Daya Bay RENO experiments which measure reactor angle. We then describe simple bimaximal, tri-bimaximal golden ratio patterns lepton deviations required for non-zero angle, with solar or atmospheric sum rules resulting from charged corrections residual...
This paper is a review of the present status neutrino mass physics, which grew out an APS sponsored study neutrinos in 2004. After discussion knowledge masses and mixing some popular ways to probe new physics implied by recent data, it summarizes what can be learned about interactions as well nature beyond Standard Model from various proposed experiments. The intriguing possibility that may at heart our understanding long standing puzzle cosmology, i.e. origin matter–antimatter asymmetry...
The origin of fermion mass hierarchies and mixings is one the unresolved most difficult problems in high-energy physics. One possibility to address flavour by extending standard model include a family symmetry. In recent years it has become very popular use non-Abelian discrete symmetries because their power prediction large leptonic mixing angles relevant for neutrino oscillation experiments. Here we give an introduction problem groups that have been used attempt solution it. We review...
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 recent LHC indications of a SM-like Higgs boson near 125 GeV are consistent not only with the Standard Model (SM) but also Supersymmetry (SUSY). However naturalness arguments disfavour Minimal Supersymmetric (MSSM). We consider Next-to-Minimal (NMSSM) involving relatively light stops and gluinos below 1 TeV in order to satisfy requirements. careful ensure that chosen values couplings do become non-perturbative grand unification (GUT) scale, although we examine how these limits may be...
We present a comprehensive analysis of neutrino mass and lepton mixing in theories with $A_5$ modular symmetry. construct the weight 2, 4 6 forms level 5 terms Dedekind eta-functions Klein forms, their decomposition into irreducible representation $A_5$. all simplest models based on symmetry, including scenarios without flavons charged sectors. For each case, masses can be generated through either Weinberg operator or type I seesaw mechanism. perform an exhaustive numerical analysis,...
Abstract In this paper, we analyse sound waves arising from a cosmic phase transition where the full velocity profile is taken into account as an explanation for gravitational wave spectrum observed by multiple pulsar timing array groups. Unlike broken power law used in literature, scenario after peak depends on macroscopic properties of transition, allowing better fit with (PTA) data. We compare best that obtained using usual and, unsurprisingly, find (GW) utilizes profile. Even more...
We propose a new method toward distinguishing the Dirac versus Majorana nature of neutrino masses from spectrum gravitational waves (GWs) associated with mass genesis. Motivated by principle generating small without tiny Yukawa couplings, we assume generic seesaw mechanisms for both and masses. For neutrinos, further spontaneously broken gauged <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>U</a:mi><a:mo stretchy="false">(</a:mo><a:mn>1</a:mn><a:msub><a:mo...
We explore how quantum gravity effects, manifested through the breaking of discrete symmetry responsible for both dark matter and domain walls, can have observational effects cosmic microwave background observations gravitational waves. To illustrate idea we consider a simple model with two scalar fields ${\mathcal{Z}}_{2}$ symmetries, one being stability, other spontaneously broken where symmetries are assumed to be explicitly by effects. show recent wave spectrum observed several pulsar...
The observed neutrino mixing, having a near maximal atmospheric mixing angle and large solar angle, is close to tri-bi-maximal. We argue that this structure suggests family symmetric origin in which the magnitude of angles are related existence discrete non-Abelian symmetry. construct model symmetry group $Δ(27)$, subgroup SU(3) tri-bi-maximal directly follows from vacuum enforced by In addition lepton angles, accounts for quark masses CKM matrix. also consistent with an underlying stage...
The conclusions of the Physics Working Group international scoping study a future Neutrino Factory and super-beam facility (the ISS) are presented. ISS was carried by community between NuFact05, 7th International Workshop on Factories Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) NuFact06 (Ivine, California, 24{30 August 2006). physics case for an extensive experimental programme to understand properties neutrino is presented role high-precision measurements...
This is a review article about neutrino mass models, particularly see-saw models involving three active neutrinos that are capable of describing both the atmospheric oscillation data and large mixing angle (LMA) MSW solar solution, which now uniquely specified by recent data. We briefly current experimental status, show how to parametrize construct matrix, present leading order Majorana matrices. then introduce mechanism discuss natural application it using sequential dominance mechanism, we...
We perform a detailed analysis of the next-to-minimal supersymmetric standard model (NMSSM), imposing constraints two-loop gauge coupling unification, universal soft supersymmetry breaking, and correct pattern electroweak symmetry breaking. compare our results with those for minimal (MSSM) using closely related techniques and, as far possible, common set input output variables. In general, in constrained NMSSM, there are much stronger correlations between parameters than MSSM, we map out...
We make a comprehensive study of the theory and phenomenology low energy supersymmetric standard model originating from string-inspired $E_6$ grand unified gauge group. The Exceptional Supersymmetric Standard Model (ESSM) considered here is based on SM group together with an extra $Z'$ corresponding to $U(1)_{N}$ symmetry under which right--handed neutrinos have zero charge. matter content ESSM corresponds three 27 representations group, ensure anomaly cancellation, plus additional pair...
We present a model of quark and lepton masses mixings based on A4 family symmetry, discrete subgroup an SO(3) flavour together with Pati-Salam unification. It accommodates tri-bimaximal neutrino mixing via constrained sequential dominance particularly simple vacuum alignment mechanism emerging through the effective D-term contributions to scalar potential.
It has recently been shown how tri-bimaximal neutrino mixing can be achieved, using the see-saw mechanism with constrained sequential dominance, through vacuum alignment of a broken non-Abelian gauged family symmetry such as SO(3) or SU(3). Generalising approach Altarelli and Feruglio developed for an $A_4$ model we show reduction underlying to discrete subgroup SU(3) renders this generic property models. This means near quite naturally accommodated in complete unified theory quark lepton masses.