A5005955121- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Quantum Mechanics and Applications
- Noncommutative and Quantum Gravity Theories
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
- Physics of Superconductivity and Magnetism
- Particle Accelerators and Free-Electron Lasers
- Intestinal Malrotation and Obstruction Disorders
- Random lasers and scattering media
- Quantum Computing Algorithms and Architecture
- Quantum Electrodynamics and Casimir Effect
- Diverse Scientific and Engineering Research
- Superconducting and THz Device Technology
- Microscopic Colitis
Peking University
2016-2025
State Key Laboratory of Nuclear Physics and Technology
2013-2023
Collaborative Innovation Center of Quantum Matter
2015-2023
Peking University Stomatological Hospital
2021
Institute of Theoretical Physics
2013
Fermi National Accelerator Laboratory
2009-2011
University of Chicago
2009-2011
Argonne National Laboratory
2009-2011
University of California, Riverside
2006-2007
Michigan State University
2004-2005
If the standard model of particle interactions is extended to include a second scalar doublet $[{H}^{+},({H}^{0}+i{A}^{0})/\sqrt{2}]$, which odd under an unbroken ${Z}_{2}$ discrete symmetry, it may be called dark doublet, because its lightest neutral member, say ${H}^{0}$, one possible component for matter Universe. We discuss general phenomenology four particles this without assuming that ${H}^{0}$ dominant source matter. also consider impact on standard-model Higgs boson $h$.
We adopt a Markov Chain Monte Carlo method to examine various new physics models which can generate the forward-backward asymmetry in top quark pair production observed at Tevatron by CDF Collaboration. study following models: (1) exotic gluon $G^\prime$, (2) extra $Z^\prime$ boson with flavor-conserving interaction, (3) flavor-violating $u$-$t$-$Z^\prime$ (4) $W^\prime$ $d$-$t$-$W^\prime$ and (5) scalars $S$ $S^\pm$ $u$-$t$-$S$ $d$-$t$-$S^\pm$ interactions. After combining measurement of...
The recently observed diphoton resonance around 750~GeV at the LHC Run-2 could be interpreted as a weak singlet scalar. scalar might also decay into pair of $Z$-boson and photon. is highly boosted appears fat jet in detector. We use substructure method to explore possibility discovering process $pp\to S\to Z\gamma$ future experiment.
Author(s): Contino, R; Curtin, D; Katz, A; Mangano, ML; Panico, G; Ramsey-Musolf, MJ; Zanderighi, Anastasiou, C; Astill, W; Bambhaniya, Behr, JK; Bizon, Dev, PS Bhupal; Bortoletto, Buttazzo, Cao, Q-H; Caola, F; Chakrabortty, J; Chen, C-Y; S-L; Florian, D de; Dulat, Englert, Frost, JA; Fuks, B; Gherghetta, T; Giudice, Gluza, Greiner, N; Gray, H; Hartland, NP; Issever, Jelinski, Karlberg, Kim, JH; Kling, Lazopoulos, Lee, SJ; Liu, Y; Luisoni, Mazzitelli, Mistlberger, Monni, P; Nikolopoulos, K;...
Direct detection experiments turn to lose sensitivity of searching for a sub-MeV light dark matter candidate due the threshold recoil energy. However, such particles can be accelerated by energetic cosmic-rays that they detected with existing detectors. We derive constraints on scattering boosted and electron from XENON100/1T experiment. illustrate energy dependence cross section plays crucial role in improving both also complementarity direct other experiments.
We propose to identify whether a sterile neutrino is Dirac-type or Majorana-type by counting the peak of rapidity distribution at lepton colliders. Our method requires only one charged-lepton tagging, and nature neutrinos can be pinned down once they are confirmed.
This report summarises the physics opportunities for study of Higgs bosons and dynamics electroweak symmetry breaking at 100 TeV pp collider.
The successful operation of the Large Hadron Collider (LHC) and excellent performance ATLAS, CMS, LHCb ALICE detectors in Run-1 Run-2 with $pp$ collisions at center-of-mass energies 7, 8 13 TeV as well giant leap precision calculations modeling fundamental interactions hadron colliders have allowed an extraordinary breadth physics studies including measurements a variety processes. LHC results so far confirmed validity Standard Model particle up to unprecedented energy scales great sectors...
The Higgs boson production can be affected by several anomalous couplings, e.g. $c_t$ and $c_g$ couplings. Precise measurement of $gg\to h$ yields two degenerate parameter spaces $c_g$; one space exhibits the SM limit while other does not. Such a degeneracy could resolved pair production. In this work we adapt strategy suggested ATLAS collaboration to explore potential distinguishing at 14 TeV LHC. If coupling is induced only operator $H^\dag H \bar Q_L \tilde{H} t_R$, then non-SM-like band...
We interpret the diphoton anomaly as a heavy scalar ${H}_{3}$ in so-called 331 model. The is responsible for breaking $SU(3{)}_{C}\ensuremath{\bigotimes}SU(3{)}_{L}\ensuremath{\bigotimes}U(1{)}_{X}$ gauge symmetry down to standard model electroweak group. It mainly couples gluons and photons through quantum loops involving quarks leptons. Those leptons, together with SM form fundamental representation of use low energy theorem calculate effective couplings ${H}_{3}gg$,...
We show that testing Bell inequalities in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>W</a:mi><a:mo>±</a:mo></a:msup></a:math> pair systems by measuring their angular correlation suffers from the ambiguity kinetical reconstruction of dilepton decay mode. further propose a new set observables based on measurement linear polarization <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>W</c:mi></c:math> bosons can be used...
We present a study of the $t$-channel mode single top quark production at upgraded Tevatron $p\bar{p}$ collider, including next-to-leading order (NLO) QCD corrections to and decay quark. The narrow width approximation was adopted in preserve spin its decay. discuss effects different $O(\alpha_s)$ contributions on inclusive cross section as well various kinematic distributions after imposing relevant cuts select signal events.
Recent observations of high-energy positrons and electrons by the PAMELA ATIC experiments may be an indication annihilation dark matter into leptons not quarks. This leptonic connection was foreseen already some years ago in two different models radiative neutrino mass. We discuss here generic interactions (νη0−lη+)χ lcζ−χc which allow this to happen, where χ and/or χc are fermionic dark-matter candidates. point out particular importance χχ→l+l−γ both positron gamma-ray signals within framework.
We present an $SU(3)^{}_{c}\times SU(2)^{}_{L}\times SU(2)^{}_{R}\times U(1)_{L}^{}\times U(1)_{R}^{}\rightarrow SU(3)^{}_{c}\times U(1)^{}_{B-L}$ left-right symmetric model with a discrete parity symmetry to realize universal seesaw scenario. The can simultaneously solve the strong CP problem without resorting unobserved axion and explain 750 GeV diphoton resonance reported recently by ATLAS CMS collaborations at LHC. Owing large suppressions in two-loop induced Dirac mass terms, Majorana...
We consider effective Higgs boson couplings, including both $CP$-even and $CP$-odd which affect pair production. Through partial wave analysis, we find that the process $gg\ensuremath{\rightarrow}hh$ is dominated by $s$-wave component even at a 100 TeV $pp$ collider. Making use of kinematics, propose cut efficiency function to mimic collider simulation obtain potential measuring couplings 14 LHC with an integrated luminosity $3000\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ Analytical...
The ATLAS collaboration reported excesses at around 2 TeV in the diboson production decaying into hadronic final states. We consider possibility of explaining with extra gauge bosons two simple non-Abelian extensions standard model. One is so-called $G(221)$ models a symmetry structure $SU(2{)}_{1}\ensuremath{\bigotimes}SU(2{)}_{2}\ensuremath{\bigotimes}U(1{)}_{X}$ and other $G(331)$ an extended $SU(3{)}_{C}\ensuremath{\bigotimes}SU(3{)}_{L}\ensuremath{\bigotimes}U(1{)}_{X}$....
We investigate new physics effects on the Wtb effective couplings in a model-independent framework. The can be parametrized by four independent couplings, , and . further introduce set of parameters x0, xm, xp x5 which exhibit linear relation to single top production cross sections. Using recent data for t-channel section σt, tW associated σtW, s-channel σs, W-helicity fractions F0, FL FR collected at 8 TeV LHC Tevatron, we perform global fit impose constraints quark couplings. Our fitting...
We present a calculation of the next-to-leading order QCD corrections, with one-scale phase space slicing method, to single top quark production and decay process $p\bar{p},pp\to t\bar{b}+X\to b\ell\nu\bar{b}+X$ at hadron colliders. Using helicity amplitude angular correlation final state partons spin are preserved. The effect width is also examined.
More often than not, models of flavor symmetry rely on the use nonrenormalizable operators (in guise flavons) to accomplish phenomenologically successful tribimaximal mixing neutrinos. We show instead how a simple renormalizable two-parameter neutrino mass model can be constructed with non-Abelian discrete T_7 and gauging B-L. This is also achieved without addition auxiliary symmetries particles present in almost all other proposals. Most importantly, it verifiable at Large Hadron Collider.
We demonstrate that four top-quark production is a powerful tool to constrain the top Yukawa coupling. The constraint robust in sense it does not rely on Higgs boson decay. Taking into account projection of $t\bar{t}H$ by ATLAS collaobration, we obtain bound width, $\Gamma_H\leq 3.1~\Gamma_H^{\rm SM}$, at 14 TeV LHC with an integrated luminosity $300~{\rm fb}^{-1}$. Increasing $500~{\rm fb}^{-1}$ yields 2.1~\Gamma_H^{\rm SM}$.
Determination of trilinear Higgs coupling (${\ensuremath{\lambda}}_{HHH}=\ensuremath{\kappa}{\ensuremath{\lambda}}_{HHH}^{\mathrm{SM}}$) through pair productions is a major motivation for the LHC high-luminosity phase. We perform detailed collider simulation to explore potential measuring ${\ensuremath{\lambda}}_{HHH}$ in $VHH$ ($V=W$, $Z$) production at Large Hadron Collider. find that standard model (${\ensuremath{\lambda}}_{HHH}^{\mathrm{SM}}$) can be measured level...
In the minimal supersymmetric standard model (MSSM), masses of charged Higgs boson ${(H}^{\ifmmode\pm\else\textpm\fi{}})$ and CP-odd scalar (A) are related by ${M}_{{H}^{+}}^{2}{=M}_{A}^{2}{+m}_{W}^{2}$ at Born level. Because coupling ${W}^{\ensuremath{-}}\ensuremath{-}A\ensuremath{-}{H}^{+}$ is fixed gauge interaction, level production rate $q{q}^{\ensuremath{'}}\ensuremath{\rightarrow}{W}^{\ifmmode\pm\else\textpm\fi{}*}\ensuremath{\rightarrow}{\mathrm{AH}}^{\ifmmode\pm\else\textpm\fi{}}$...
Dark matter (comprising a quarter of the Universe) is usually assumed to be due one and only weakly interacting particle which neutral absolutely stable. We consider possibility that there are several coexisting dark-matter particles, explore in some detail generic case where two. discuss how second may relax severe constraints on parameter space Minimal Supersymmetric Standard Model, as well other verifiable predictions both direct indirect search experiments.
We study the electroweak phase transition in three scalar extension models beyond Standard Model. Assuming new scalars are decoupled at some heavy scale, we use covariant derivative expansion method to derive all of dimension-6 effective operators, whose coefficients highly correlated a specific model. provide bounds complete set operators by including precision test and recent Higgs measurements. find that parameter space strong first-order transitions (induced $|H|^6$ operator) can be...