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Single top quark production with and without a Higgs boson

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Chinese Physics C 2021年第9期45卷 102-108页

作者： qing-hong cao Hao-ran Jiang Guojin Zeng School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China

One method of probing new physics beyond the Standard Model is to check the correlation among higher-dimensional operators in the effective field *** examine the strong correlation between the processes pp→tHq and pp tq,which both depend on the same three *** correlation indicates that,according to the data of pp→tq,σ_(tHq)=[106.8±64.8]fb,which is significantly below the current upper limitσ_(tHq)≤900 fb.

关键词： top quark electroweak new physics

Dark matter search at colliders and neutrino floor

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Chinese Physics C 2020年第11期44卷 70-78页

作者： qing-hong cao An-Kang Wei Qian-Fei Xiang Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China

The sensitivity of the direct detection of dark matter(DM)approaches the so-called neutrino floor,below which it is difficult to disentangle the DM candidate from the neutrino *** this work,we consider the scenario that no DM signals are reported in various DM direct detection experiments and explore whether collider searches could probe DM below the neutrino *** adopt several simplified models in which the DM candidate couples to electroweak gauge bosons or leptons in the standard model only through high-dimensional *** including the RGE running effect,we investigate the constraints of direct detection,indirect detection,and collider *** collider search can probe light DM below the neutrino ***,for the effective interaction of χχBμνB^μν,current data from the mono-photon channel at the 13 TeV LHC has already covered the entire parameter space of the neutrino floor.

关键词： dark matter collider direct detection

New observable for measuring the CP property of top-Higgs interaction

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Chinese Physics C 2021年第2期45卷 319-325页

作者： qing-hong cao Ke-Pan Xie Hao Zhang Rui Zhang Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Center for Theoretical Physics Department of Physics and AstronomySeoul National UniversitySeoul 08826Korea Theoretical Physics Division Institute of High Energy PhysicsBeijing 100049China School of Physics University of Chinese Academy of ScienceBeijing 100049China

We propose a new dihedral angle observable for measuring the CP property of the interaction between the top quark and Higgs boson int\bar{t}Hproduction at the 14 TeV Large Hadron Collider(LHC).We consider two decay modes of the Higgs boson,H→to b\b and H→γγ,and demonstrate that the dihedral angle distribution is able to distinguish between the CP-even and the CP-odd hypothesis at a 95%confidence level,with an integrated luminosity of\sim 180fb^(-1).

关键词： Higgs top-quark Yukawa interaction

Probing magnetic moment operators in H_(γ) production and H→τ^(+)τ^(-)γ rare decay

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Chinese Physics C 2021年第9期45卷 88-96页

作者： qing-hong cao Hao-Ran Jiang Bin Li Yandong Liu Guojin Zeng School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China

The magnetic moment(a_(γ))and weak magnetic moment(a_(W))of charged leptons and quarks are sensitive to quantum effects of new physics heavy *** effective field theory,aγand aW are induced by two independent ***,one has to measure both a_(γ) and a_(w) to shed light on new *** aw’s of the SM fermions are measured at the *** this work,we analyze the contributions from magnetic and weak magnetic moment operators in the processes of pp→H_(γ)and gg→H→τ^(+)τ^(-)γ at the High-Luminosity Large Hadron *** demonstrate that the two processes can cover most of the parameter space that cannot be probed at the LEP.

关键词： magnetic moment Higgs new physics collider

Unraveling role of double-exchange interaction in electrochemical water oxidation by external magnetic field

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Rare Metals 2024年第1期43卷 289-297页

作者： Jun Li Jun-Ming Li hong hong Dong-Xue Liu qing-Qi cao Dun-Hui Wang National Laboratory of Solid State Microstructures and Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

Double-exchange(DE) interaction plays an important role in electrocatalytic oxygen evolution reaction(OER).However,precise achievement of DE interaction often requires foreign dopants or vacancy engineering,leading to destabilization of the catalysts and deterioration of *** contrast,the utilization of environmentally friendly,contactless,and continuously adjustable magnetic fields to study the OER process is profitable to avoid aforementioned interference factors and further elucidate the direct relationship_(0.5)between DE interaction and OER ***,by using cobalt hydroxide carbonate(Co(OH)(CO_(3))·xH_(2)O,CoHC) nanostructures as a proof-of-concept study,external magnetic fields are carefully implemented to verify the role of DE interaction during water oxidation *** studies reveal that external magnetic fields effectively enhance the reaction rate of the catalyst,the overpotential decreases from 386 to 355 mV(100 mA·cm^(-2)),while Tafel slopes drastically decline from 93 to 67 mV·dec^(-1)(1.0 T).Moreover,magnetic field increment exhibits robust *** in situ Raman and impedance measurements under external field,it can be found that magnetic field promotes the electron migration between Co^(2+) and Co^(3+) in the CoHC catalysts with the assistance of DE interactions,thus boosting the OER efficiency.

关键词： Magnetic field Double-exchange(DE)interaction Electrocatalysis Oxygen evolution reaction(OER) Cobalt hydroxide carbonate

Probing top-philic new physics via four-top-quark production

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Chinese Physics C 2021年第9期45卷 81-87页

作者： qing-hong cao Jun-Ning Fu Yandong Liu Xiao-Hu Wang Rui Zhang Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China Theoretical Physics Division Institute of High Energy PhysicsBeijing 100049China

We explore constraints on various new physics resonances from four top-quark production based on current experimental *** light and heavy resonances are studied in this work.A comparison of the full width effect and n... 详细信息

关键词： top quark new physics collider physics

New physics and two boosted W-jets plus missing energy

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Chinese Physics C 2021年第9期45卷 97-101页

作者： qing-hong cao Nuo Chen Hao-Ran Jiang Bin Li Yandong Liu School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China

We show that the signature of two boosted W-jets plus substantial missing energy is very promising for probing heavy charged resonances(X^(±))through the process of pp→X^(+)X^(-)→W^(+)W^(-)X^(0) X^(0),where X^(0) denotes the dark matter *** hadronic decay mode of the W boson is considered to maximize the number of signal *** the mass split between X±and X0 is large,the jet-substructure technique must be utilized to analyze the boosted ***,we consider the process of chargino pair production at the LHC,i.e.,pp→χ^(+)_(1)χ^(-)_(1)→W^(+)W^(-)χ^(0)_(1)χ^(0)_(1),and demonstrate that the proposed signature is able to cover more parameter space of m_(χ1)^(±)and m_(χ1)0,than the conventional signature of multiple leptons plus missing *** importantly,the signature of interest is not sensitive to the spin of heavy resonances.

关键词： new physics collider physics supersymmetry

Enhanced hydrogen evolution reaction in FePt film with remanence due to decrease in domain walls

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Rare Metals 2024年第3期43卷 1108-1115页

作者： hong hong Dong-Xue Liu Jun Li Jun-Ming Li Li-Qian Wu Bo Yang qing-Qi cao Dun-Hui Wang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresJiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing210093China Hangzhou Dianzi University Hangzhou310018China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang110819China

As an effective strategy to improve the properties of electrocatalysts,magnetic field-assisted electrocatalytic water splitting has attracted increasing attention ***,the corresponding enhancements mostly depend on the exertion of an external magnetic field during electrochemical reactions,which results in a high cost of industrial production,and makes the magnetic field manipulation of electrocatalysis become a challenging *** this work,instead of the external magnetic field,a bias magnetic field is self-supplied by the remanence state of a ferromagnetic electrocatalyst of *** to the assistance of this bias magnetic field,the FePt film in the remanence state shows the overpotential of 229 mV during hydrogen evolution reaction,which is much lower than that in its demagnetization state(283 mV).Our findings demonstrate that the remanence in ferromagnetic electrocatalysts can improve the catalytic performance,which is attributed to the decrease in domain walls.

关键词： Remanence Magnetic domains Electrocatalysis Hydrogen evolution reaction(HER)

Advanced Design of Soft Robots with Artificial Intelligence

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Nano-Micro Letters 2024年第10期16卷 474-521页

作者： Ying cao Bingang Xu Bin Li hong Fu Nanotechnology Center School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kong 999077People's Republic of China Department of Mathematics and Information Technology The Education University of Hong KongHong Kong 999077People's Republic of China Bioinspired Engineering and Biomechanics Center Xi'an Jiaotong UniversityXi'an 710049People's Republic of China

In recent years,breakthrough has been made in the field of artificial intelligence(AI),which has also revolutionized the industry of *** robots featured with high-level safety,less weight,lower power consumption have always been one of the research ***,multifunctional sensors for perception of soft robotics have been rapidly developed,while more algorithms and models of machine learning with high accuracy have been optimized and *** of soft robots with AI have also been advanced ranging from multimodal sensing,human-machine interaction to effective actuation in robotic ***-less,comprehensive reviews concerning the new developments and strategies for the ingenious design of the soft robotic systems equipped with AI are ***,the new development is systematically reviewed in the field of soft robots with ***,background and mechanisms of soft robotic systems are briefed,after which development focused on how to endow the soft robots with AI,including the aspects of feeling,thought and reaction,is ***,applications of soft robots with AI are systematically summarized and discussed together with advanced strategies proposed for performance *** thoughts for future intelligent soft robotics are pointed ***,some perspectives are put forward.

关键词： Soft robotic systems Artificial intelligence Design tactics Review and perspective