A5051457613- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Parallel Computing and Optimization Techniques
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
Shandong University
2011-2025
Kavli Institute for Theoretical Sciences
2008-2016
Institute of Theoretical Physics
2008-2016
Chinese Academy of Sciences
2013-2016
Black holes have long served as a testing ground for probing theories of gravity and quantum mechanics. Notably, fundamental fields in the neighborhood black exhibit rich phenomena that could yield astrophysical observable signatures. However, exploring these structures typically requires computationally intensive numerical calculations. In this work, dynamics massive Dirac field outside Schwarzschild hole is revisited. We propose novel matching scheme enables analytical solution coupled...
Superradiance can lead to the formation of a black hole (BH) condensate system. We thoroughly investigate accretion effect on evolution this system, and gravitational wave signals it emits in presence multiple superradiance modes. Assuming multiplication BH mass scalar as small number, we obtain analytical approximations all important quantities, which be directly applied phenomenological studies. In addition, confirm that could significantly enhance (GW) emission reduce its duration, show...
B meson semi-leptonic rare decays are sensitive to new physics beyond standard model. We study the $B^{-}\to \pi^{-}\mu^{+}\mu^{-}$ process and investigate Majorana neutrino contribution its decay width. The constraints on mass mixing parameter obtained from this channel with latest LHCb data. Utilizing best fit for parameters, we lepton number violating \pi^{+}\mu^{-}\mu^{-}$, find branching ratio is about $6.4\times10^{-10}$, which consistent data reported recently.
The approximate solution of the Klein-Gordon equation for a real scalar field mass $\mu$ in geometry Kerr black hole obtained by Detweiler \cite{Detweiler:1980uk} is widely used analysis stability holes as well search axion-like particles. In this work, we confirm missing factor $1/2$ solution, which was first identified Ref.~\cite{Pani:2012bp}. corrected result has strange features that put questions on power-counting strategy. We solve problem adding next-to-leading order (NLO)...
Ultralight scalars could extract energy and angular momentum from a Kerr black hole (BH) because of superradiant instability. Multiple modes labeled with $nlm$ grow while rotating around the BH, emitting continuous gravitational waves (GWs). In this work, we carefully study contribution subdominant $n\ensuremath{\ge}1$ in evolution BH-condensate system. We find that BH still evolves along Regge trajectory $n=0$ even presence modes. The interference dominant produces beats emitted GWs, which...
We study the Bc meson rare decay in order to search for Majorana neutrino signal. It is found that corresponding rate sensitive mass and mixing angles. The signal of B±c → l±1l±2M∓ induced by within region mπ < mn mB may be observed at LHCb.
Using the general factorization approach, we present a detailed investigation for branching ratios, $CP$ asymmetries and longitudinal polarization fractions in all charmless hadronic $B\ensuremath{\rightarrow}VV$ decays (except pure annihilation processes) within most two-Higgs-doublet model with spontaneous violation. It is seen that such new physics only has very small contributions to ratios fractions. However, as rich $CP$-violating sources, it can lead significant effects on...
We investigate the possibility to discover charged Higgs via $pp\ensuremath{\rightarrow}{W}^{\ifmmode\pm\else\textpm\fi{}}{H}^{\ensuremath{\mp}}\ensuremath{\rightarrow}l+{\mathrm{E\ensuremath{\llap{\not\;}}}}_{T}+b\overline{b}jj$ process at LHC, which suffers from large QCD backgrounds. optimize kinematic cuts suppress backgrounds, so that reconstruction of through hadronic decay is possible. The angular distribution $b$ jet ${H}^{\ifmmode\pm\else\textpm\fi{}}$ investigated as a way identify...
Ultralight vectors can extract energy and angular momentum from a Kerr black hole (BH) due to superradiant instability, resulting in the formation of BH-condensate system. In this work, we carefully investigate evolution system numerically with multiple modes. Simple formulas are obtained estimate important timescales, maximum masses different modes, as well BH mass spin at various times. Due coexistence modes small frequency differences, emits gravitational waves unique beat signature,...
Spontaneous $CP$ violation motivates the introduction of two Higgs doublets in electroweak theory. Such a simple extension standard model has three neutral bosons and pair charged Higgs; it especially leads to rich $CP$-violating sources, including induced Kobayashi-Maskawa phase, mixing due $CP$-odd Higgs, effective complex Yukawa couplings bosons. Within this model, we present production boson association with $W$ at LHC, calculate detail cross section transverse momentum distribution...
The superradiant instabilities of Kerr-Newman black holes with charged or uncharged massive spin-0 fields are calculated analytically to the next-to-leading order in limit $\ensuremath{\alpha}\ensuremath{\sim}{r}_{g}\ensuremath{\mu}\ensuremath{\ll}1$. A missing factor $1/2$ previous leading-order result is identified. has a compact form and good agreement existing numerical calculations. percentage error increases $\ensuremath{\alpha}$, from few percent for...
The mass of the axionlike particles could be constrained by observed black hole spin distribution. In this work, we study such constraints using LIGO/Virgo data and recently improved superradiance formula, which agrees better with numerical results. effect merger timescale ${\ensuremath{\tau}}_{M}$ is also carefully investigated Bayesian analysis. We find strength evidence for range $\ensuremath{-}12.89\ensuremath{\le}{\mathrm{log}}_{10}(\ensuremath{\mu}/\mathrm{eV})\ensuremath{-}12.57$,...
Many new physics models predict the existence of TeV-scale charged gauge boson ${W}^{\ensuremath{'}}$ together with Higgs-boson(s). We study ${W}^{\ensuremath{'}}WH$ interaction and explore angular distribution leptons to distinguish ${W}_{R}^{\ensuremath{'}}WH$ from ${W}_{L}^{\ensuremath{'}}WH$ in $pp\ensuremath{\rightarrow}HW\ensuremath{\rightarrow}b\overline{b}l\ensuremath{\nu}$ process at LHC. It is found that a type forward-backward asymmetry (${A}_{\mathrm{FB}}$) relating angle between...
Spontaneous $CP$ violation motivates the introduction of two Higgs doublets in electroweak theory, such a simple extension standard model has five physical bosons and rich $CP$-violating sources. Exploration on more than one boson is direct evidence for new physics beyond model. The neutral production at LHC investigated general two-Higgs-doublet with spontaneous violation, it shown that cross section decays can significantly be different from predictions
Based on the $SU(3)_{F}$ gauge family symmetry model which was proposed to explain observed mass and mixing pattern of neutrinos, we investigate breaking, in quark lepton sectors, contribution new bosons some flavour changing neutral currents (FCNC) processes at low energy. With current data differences pseudo-scalar $P^{0}-\bar{P}^{0}$ systems, find that breaking scale can be as 300TeV lightest boson about $100$TeV. Other FCNC processes, such number violation process $\mu^{-}\rightarrow...
Wormholes bridging distant places of the universe are well-known solutions general relativity. In particular, traversable wormholes which allow interstellar traveling also popular in science fiction. However, no hint their existence has been found yet. this work, we propose using gravitational wave (GW) scattering off spherical to search for existence. We carefully calculate reflected and transmitted waveforms with time-independent theory. Our results quantitatively show echo signatures two...
We consider extensions of the standard model with fourth generation fermions (SM4) in which extra symmetries are introduced such that transitions between and ones first three generations forbidden. In these models, stringent lower bounds on masses quarks from direct searches can be relaxed, lightest neutrino is allowed to stable light enough trigger Higgs boson invisible decay. addition, Majorana a subdominant but highly detectable dark matter component. perform global analysis current Large...
The axion-gluon coupling can be constrained directly through hard exclusive processes at the LHC. Specifically, we study associated production of a long-lived axion with $\rho^0$ meson in ultra-peripheral $AA$ collisions and $pp$ collisions. With escaped from detector, final state is characterized by mono-hadron signature. main background our analysis originates $\rho^0+\pi^0$ process, where photons $\pi^0$ decay are undetected due to limited detector performance. Our yields an exclusion...
Ultralight vectors can extract energy and angular momentum from a Kerr black hole (BH) due to superradiant instability, resulting in the formation of BH-condensate system. In this work, we carefully investigate evolution system numerically with multiple modes. Simple formulas are obtained estimate important timescales, maximum masses different modes, as well BH mass spin at various times. Due coexistence modes small frequency differences, emits gravitational waves unique beat signature,...
The axion-gluon coupling can be constrained directly through hard exclusive processes at the LHC. Specifically, we study associated production of a long-lived axion with <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>ρ</a:mi><a:mn>0</a:mn></a:msup></a:math> meson in ultraperipheral <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>A</c:mi><c:mi>A</c:mi></c:math> collisions and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
The small Kerr-anti-de Sitter black hole demonstrates instability due to the superradiance of either a massive or massless scalar field. Previous leading-order approximations spectrum are inefficient. In particular, real part eigenfrequency is insensitive spin hole. this work, we improve analysis by including next-to-leading-order contribution. Compared numerical calculation, new spin-dependent presents significantly better agreement, and error in imaginary also reduced less than 60% for most spins.