A5072679998- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Astronomy and Astrophysical Research
- Cooperative Communication and Network Coding
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Radiation Detection and Scintillator Technologies
- Parallel Computing and Optimization Techniques
- Advanced MIMO Systems Optimization
Nankai University
2020-2024
Institute of Theoretical Physics
2015-2018
Chinese Academy of Sciences
2015-2018
Kavli Institute for Theoretical Sciences
2016-2017
University of Chinese Academy of Sciences
2017
Université Libre de Bruxelles
2013-2016
Chalmers University of Technology
2016
Stockholm University
2016
International Solvay Institutes
2016
Max Planck Institute for Physics
2010-2013
The LHCb Collaboration reported anomalies in $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$, ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$, and $R(K)=B\ensuremath{\rightarrow}\phantom{\rule{0ex}{0ex}}K{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}/B\ensuremath{\rightarrow}K{e}^{+}{e}^{\ensuremath{-}}$. Furthermore, BABAR, BELLE, Collaborations found hints for the violation of...
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...
This document a outlines set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these have when applied searches at LHC, provide number useful expressions reference. The list includes both s-channel t-channel scenarios. For s-channel, spin-0 spin-1 mediations are discussed, also realizations where Higgs particle provides portal between visible sectors. guiding principles underpinning proposed...
Lepton number as a fourth color is an intriguing theoretical idea which combined with possible left-right symmetry within the famous Pati-Salam (PS) model. In conventional PS model, spontaneous breaking of gauge group down to SM one can only take place at very high scales (above PeV scale) due stringent bounds from $K_L\to\mu e$ and $K\to\pi\mu induced by resulting vector leptoquarks. this paper, we show that these constraints be avoided once additional vector-like fermions are introduced...
We show that solving the flavor problem of Standard Model with a simple $U(1)_H$ symmetry naturally leads to an axion solves strong CP and constitutes viable Dark Matter candidate. In this framework, ratio mass its coupling photons is related SM fermion masses predicted within small range, as direct result observed hierarchies in quark charged lepton masses. The same determine couplings fermions, making framework very predictive experimentally testable by future precision experiments.
A bstract We assess the status of past and future experiments on lepton flavor violating (LFV) muon tau decays into a light, invisible, axion-like particle (ALP), . propose new experimental setup for MEG II, MEGII-fwd , with forward calorimeter placed downstream from stopping target. Searching μ → ea is maximally sensitive to LFV ALPs, if these have nonzero couplings right-handed leptons. The set-up suppresses (left-handed) Standard Model background in direction by controlling polarization...
There has recently been a dramatic renewal of interest in the subjects hadron spectroscopy and charm physics. This renaissance driven part by discovery plethora charmonium-like $XYZ$ states at BESIII $B$ factories, observation an intriguing proton-antiproton threshold enhancement possibly related $X(1835)$ meson state BESIII, as well measurements mesons baryons. We present detailed survey important topics tau-charm physics that can be further explored over remaining lifetime BEPCII...
We construct models with minimal field content that can simultaneously explain the muon g-2 anomaly and give correct dark matter relic abundance. These fall into two general classes, whether or not new fields couple to Higgs. For structure of without Higgs couplings, we provide analytical expressions only depend on $SU(2)_L$ representation. results allow demonstrate few in this class $(g-2)_\mu$ account for The experimental constraints perturbativity considerations exclude all such models,...
In the light of recent result Muon g-2 experiment and update on test lepton flavour universality $R_K$ published by LHCb collaboration, we systematically build discuss a set models with minimal field content that can simultaneously give: (i) thermal Dark Matter candidate; (ii) large loop contributions to $b\to s\ell\ell$ processes able address other $B$ anomalies; (iii) natural solution muon $g-2$ discrepancy through chirally-enhanced contributions.
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,...
The Singlet-Doublet model of dark matter is a minimal extension the Standard Model with that mixture singlet and non-chiral pair electroweak doublet fermions. stability ensured by typical parity symmetry, and, similar to 'Bino-Higgsino' system, extra content improves gauge coupling unification. We revisit experimental constraints on model, combining most relevant bounds from direct (spin independent spin dependent) indirect searches. show such comprehensive analysis sets strong large part...
We study the phenomenology of simplified ${Z}^{\ensuremath{'}}$ models with a global $U(2{)}^{3}$ flavor symmetry in quark sector, broken solely by Standard Model Yukawa couplings. This symmetry, known as less-minimal violation, protects $\mathrm{\ensuremath{\Delta}}F=2$ processes from dangerously large new physics (NP) effects and at same time provides free complex phase $b\ensuremath{\rightarrow}s$ transitions, allowing for an explanation hints additional direct $CP$ violation kaon decays...
The stringent experimental bound on μ → eγ is compatible with a simultaneous and sizable new physics contribution to the electron muon anomalous magnetic moments (g − 2)ℓ (ℓ = e, μ), only if we assume non-trivial flavor structure of dipole operator coefficients. We propose mechanism in which realization correction manifestly related mass generation through symmetry. A radiative flavon fermion gives moment. In this framework, introduce chiral enhancement from $$ \mathcal{O} (1) quartic...
We present two models of dark matter~(DM) that can provide a natural explanation the excess \mbox{$B^+\to K^+ +\,\text{invisible}$} events with respect to Standard Model~(SM) prediction for \nu\bar\nu$}, which has been reported by Belle~II collaboration. Interactions between and visible sector are mediated an axion-like particle (ALP) in one case, kinetic mixing photon SM second case. Both encompass light fermion singlet as DM candidate account observed relic abundance through, respectively,...
We address the question how light lightest MSSM neutralino can be as dark matter candidate in a scenario where all supersymmetric scalar particles are heavy. The hypothesis that accounts for observed density sets strong requirements on spectrum, thus providing an handle collider tests. In particular below 100 GeV relic constraint translates into upper bound Higgsino mass parameter $\mu$ case One define simplified model highlights only necessary features of spectrum and their observable...
A bstract Displaced vertices at colliders, arising from the production and decay of long-lived particles, probe dark matter candidates produced via freeze-in. If one assumes a standard cosmological history, these decays happen inside detector only if is very light because relic density constraint. Here, we argue how displaced events could well point to freeze-in within non-standard early universe history. Focusing on cosmology inflationary reheating, explore interplay between reheating...
Abstract In this work we assess the potential of discovering new physics by searching for lepton-flavour-violating (LFV) decays Z boson, $$Z\rightarrow \ell _i _j$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Z</mml:mi> <mml:mo>→</mml:mo> <mml:msub> <mml:mi>ℓ</mml:mi> <mml:mi>i</mml:mi> </mml:msub> <mml:mi>j</mml:mi> </mml:mrow> </mml:math> , at proposed circular $$e^+e^-$$ <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>-</mml:mo>...
It is pointed out that in a general class of flavour models one can identify certain universally present FCNC operators, induced by the exchange heavy messengers. Their coefficients depend on rotation angles connect and fermion mass basis. The lower bounds messenger scale are derived using updated experimental constraints operators. obtained different for operators addition they chosen set rotations. Given sensitivity expected forthcoming experiments, analysis suggests interesting room...
A bstract We study a minimal modification of Gauge Mediation in which the messenger sector couples directly to MSSM matter fields. These couplings are controlled by same dynamics that explain flavor hierarchies, and therefore parametrically as small Yukawas. This setup gives rise an interesting SUSY spectrum is calculable terms single new parameter. Due large A-terms, model can easily accommodate 126 GeV Higgs with relatively light spectrum. The structure depends on particular underlying...
We study the anatomy and phenomenology of lepton flavor violation (LFV) in context flavored gauge mediation (FGM). Within FGM, messenger sector couples directly to MSSM matter fields with couplings controlled by same dynamics that explains hierarchies SM Yukawas. Although pattern depends on particular underlying model, FGM provides a built-in suppression similar wave function renormalization or SUSY partial compositeness. Moreover, contrast these models, there is an additional left–right...