A5108077991- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Spectroscopy and Quantum Chemical Studies
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Methane Hydrates and Related Phenomena
- Protein Structure and Dynamics
- Molecular spectroscopy and chirality
- Bee Products Chemical Analysis
- Geophysics and Gravity Measurements
- Meat and Animal Product Quality
- advanced mathematical theories
- CCD and CMOS Imaging Sensors
Institute for Advanced Study
2025
University of Chinese Academy of Sciences
2020-2024
International Centre for Theoretical Physics Asia-Pacific
2021-2024
University of Michigan
1995-2024
University of Arizona
2018-2023
Guizhou Academy of Agricultural Sciences
2022
Guizhou University
2022
University of Southampton
2018-2021
Chinese Academy of Sciences
2010-2020
Durham University
2016-2020
We develop a general formalism for multiple moduli and their associated modular symmetries. apply this to an example based on three with finite symmetries $S_4^A$, $S_4^B$ $S_4^C$, two right-handed neutrinos the charged lepton sector, respectively. The symmetry is broken by bi-triplet scalars diagonal $S_4$ subgroup. low energy effective theory involves independent fields $\tau_A$, $\tau_B$ $\tau_C$, which preserve residual subgroups $Z_3^A$, $Z_2^B$ $Z_3^C$, in respective sectors, leading...
We discuss a minimal flavour model with twin modular symmetries, leading to trimaximal TM$_1$ lepton mixing in which the first column of tri-bimaximal matrix is preserved. The involves two $S_4$ groups, one acting neutrino sector, associated modulus field value $\tau_{SU}$ residual $Z^{SU}_2$ symmetry, and charged $\tau_{T}$ $Z^{T}_3$ symmetry. Apart from predictions mixing, leads new mass sum rule implies lower bounds on masses close current limits neutrinoless double beta decay experiments...
Proton decay is a smoking gun signature of grand unified theories (GUTs). Searches by Super-Kamiokande have resulted in stringent limits on the GUT symmetry-breaking scale. The large-scale multipurpose neutrino experiments DUNE, Hyper-Kamiokande, and JUNO will either discover proton or further push scale above $1{0}^{16}\text{ }\text{ }\mathrm{GeV}$. Another possible observational consequence GUTs formation cosmic string network produced during breaking to standard model gauge group....
We present a comprehensive analysis of supersymmetric SO(10) grand unified theory, which is broken to the Standard Model via breaking two intermediate symmetries. The spontaneous first symmetry, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>B</a:mi><a:mo>−</a:mo><a:mi>L</a:mi></a:mrow></a:math>, leads generation cosmic strings and right-handed neutrino masses further an observable cosmological background gravitational waves light type-I seesaw mechanism....
A bstract We study supersymmetric (SUSY) flipped SU(5) × U(1) unification, focussing on its predictions for proton decay, fermion masses and gravitational waves. performed a two-loop renormalisation group analysis showed that the SUSY model predicts high GUT scale M > 10 16 GeV. also investigated restrictions B − L which is associated with χ breaking scale. found can vary in broad region negligible or little effect value of . Proton decay this induced by dimension-6 operators only. The...
We provide a systematic and thorough exploration of the Δ(48) family symmetry consistent generalised CP symmetry. A model-independent analysis achievable lepton flavor mixing is performed by considering all possible remnant symmetries in neutrino charged sectors. find new interesting pattern which both angles phases are nontrivial functions single parameter θ. The value θ can be fixed measured reactor angle 13, excellent agreement with present data achieved. supersymmetric model based on...
A bstract We consider for the first time level 7 modular invariant flavour models where lepton mixing originates from breaking of symmetry and couplings responsible masses are forms. The latter decomposed into irreducible multiplets finite group Γ , which is isomorphic to PSL(2 Z ), projective special linear two dimensional matrices over Galois field seven elements, containing 168 sometimes written as PSL 2 (7) or Σ(168). At weight 2, there 26 linearly independent forms, organised a triplet,...
We show how the generation of right-handed neutrino masses in Majoron models may be associated with a first-order phase transition and accompanied by production stochastic background gravitational waves (GWs). explore different energy scales only renormalizable operators effective potential. If occurs above electroweak scale, signal can tested future interferometers. consider two possible for transitions below scale. at GeV, LISA provide complementary cosmological probe to searches FASER...
A bstract The idea of modular invariance provides a novel explanation flavour mixing. Within the context finite symmetries Γ N and for given element γ ∈ , we present an algorithm finding stabilisers (specific values moduli fields τ which remain unchanged under action associated to ). We then employ this find all each groups = 2 5, namely, ≃ S 3 4 5 . These leave preserved specific cyclic subgroup This is interest build models fermionic mixing where sector preserves separate residual symmetry.
A bstract Grand Unified Theories (GUT) predict proton decay as well the formation of cosmic strings which can generate gravitational waves. We determine non-supersymmetric SO(10) breaking chains provide gauge unification in addition to a signal from strings. calculate GUT and intermediate scales for these by solving renormalisation group equations at two-loop level. This analysis predicts scale, hence lifetime, scale string generation thus associated wave signal. survive event null results...
Non-Abelian discrete symmetries have been widely used to explain the patterns of lepton masses and flavor mixing. In these models, a given symmetry is assumed at high scale then spontaneously broken by scalars (the flavons), which acquire vacuum expectation values. Typically, resulting leading order predictions for oscillation parameters require corrections in comply with neutrino data. We introduce such through an explicit small breaking symmetry. This has advantage solving cosmological...
Abstract Baryon number conservation is not guaranteed by any fundamental symmetry within the standard model, and therefore has been a subject of experimental theoretical scrutiny for decades. So far, no evidence baryon violation observed. Large underground detectors have long used both neutrino detection searches violating processes. The next generation large will seek to improve upon limits set past current experiments cover range lifetimes predicted several Grand Unified Theories. In this...
We propose to understand the mixing angles and CP-violating phases from Δ(48) family symmetry combined with generalized CP symmetry. A model-independent analysis is performed by scanning all possible breaking chains. find a new pattern only one free parameter, excellent agreement observed can be achieved are predicted take nontrivial values. This testable in near future neutrino oscillation neutrinoless double-beta decay experiments. Finally, flavor model constructed realize this pattern.
If the massive neutrinos are identified to be Majorana particles via a convincing measurement of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay, how determine $CP$-violating phases in $3\ifmmode\times\else\texttimes\fi{}3$ lepton flavor mixing matrix $U$ will become desirable experimental question. The answer this question is explore all possible lepton-number-violating (LNV) processes which really matter. In paper we carry out systematic study $CP$...
We study Flipped $SU(5)\times U(1)$ Grand Unified Theories (GUTs) with $\Gamma_3\simeq A_4$ modular symmetry. propose two models different weights assignments, where the fermion mass hierarchy can arise from weighton fields. In order to relax constraint on Dirac neutrino Yukawa matrix we appeal mechanisms which allow incomplete GUT representations, allowing a good fit quark and charged lepton masses mixing for single modulus field $\tau$, well determined by type I seesaw mechanism, at...
A bstract We consider a minimal non-supersymmetric SO(10) Grand Unified Theory (GUT) model that can reproduce the observed fermionic masses and mixing parameters of Standard Model. calculate scales spontaneous symmetry breaking from GUT to Model gauge group using two-loop renormalisation equations. This procedure determines proton decay rate scale U(1) B−L breaking, which generates cosmic strings right-handed neutrino mass scales. Consequently, regions parameter space where thermal...
The sky of astrophysical gravitational waves is expected to be quiet above $\sim 10{\rm kHz}$, which the upper limit characteristic frequencies dynamical processes involving black holes and neutron stars. Therefore, ultrahigh ($\ge kHz}$) frequency window particularly promising for detecting primordial waves, as isolating contribution from foreground has always been a challenging problem wave background detection at ${\rm nHz, mHz}$ audio band studied so far. While there are various types...
The coherent photons induced by relativistic heavy ions are highly linearly polarized, in close analogy to the linear polarization of gluons a large nucleus. We proposed measure photon through azimuthal asymmetries dilepton production ultra-peripheral collisions. Our prediction for were soon confirmed STAR experiment with high precision. refined our analysis recently including final state soft radiation effect beyond double leading logarithm approximation. and acoplanarity at relatively...
A bstract We present a supersymmetric Pati-Salam model with small representations as potential candidate for physics beyond the Standard Model. The features Higgs sector bifundamental fields H R + $$ {\overline{H}}_R <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mover> <mml:mi>H</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>R</mml:mi> </mml:msub> </mml:math> = (4, 1, 2) ( \overline{4} <mml:mn>4</mml:mn> , 2), L {\overline{H}}_L <mml:mi>L</mml:mi> 2, 1) well...
In the flavor basis where mass eigenstates of three charged leptons are identified with their eigenstates, one may diagonalize a 3 X Majorana neutrino matrix M_nu by means standard parametrization mixing V. this treatment unphysical phases have to be carefully factored out, unless special phase convention for fields is chosen so as simplify M'_nu without any phases. We choose and establish some exact analytical relations between elements M'_nu^dag seven physical parameters --- masses (m_1,...
We discuss the breaking of $SO(3)$ down to finite family symmetries such as $A_4$, $S_4$ and $A_5$ using supersymmetric potentials for first time. analyse in detail case $A_4$ its subgroups $Z_3$ $Z_2$. then propose a model leptons along these lines, originating from $SO(3)\times U(1)$, which leads phenomenologically acceptable pattern lepton mixing masses once subleading corrections are taken into account. also phenomenological consequences having gauged $SO(3)$, leading massive gauge...
GUT phase transition during inflation solves the monopole problem on one hand. On other hand, gravitational waves (GWs) from such a transition, if it is first-order, are redshifted and deformed, might be observed today in GW observatories. We review formalism of inflated GWs derive general deformation function between uninflated spectra instant-source application. It valid for any e-folding number instant source. Applying to we find that at 15 or 25 can shift 10 Hz mHz hands, respectively,...
A bstract We investigate the properties of domain walls arising from non-Abelian discrete symmetries, which we refer to as walls. focus on S 4 , one most commonly used groups in lepton flavour mixing models. The spontaneous breaking leads distinct vacua preserving a residual Z 2 or 3 symmetry. Five types are found, labelled SI, SII, TI, TII, and TIII, respectively, former two separating latter three vacua. highlight that TI TIII may be unstable for some regions parameter space decay stable...