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Chinese physics C 2022年第4期46卷 57-69页

作者： Nilanjana Kumar Takaaki Nomura Hiroshi Okada Department of physics and Astrophysics University of DelhiDelhi 110007India School of physics KIASSeoul 02455Korea Asia Pacific Center for Theoretical physics(APCTP)-Headquarters San 31 Hyoja-dongNam-guPohang 790-784Korea Department of physics Pohang University of Science and TechnologyPohang 37673Korea

We consider a model with multi-charged particles,including vector-like fermions,and a charged scalar under a local U(1)_(μ−τ) *** search for an allowed parameter region explaining muon anomalous magnetic moment(muon g−2)and b→sℓ^(+)ℓ^(−) anomalies,satisfying constraints from the lepton flavor violations,Z boson decays,meson anti-meson mixing,and collider *** numerical analysis,we explore the typical size of the muon g−2 and Wilson coefficients to explain the b→sℓ^(+)ℓ^(−) anomalies in our model when all other experimental constraints are ***,we discuss the collider physics of the multicharged vectorlike fermions,considering a number of benchmark points in the allowed parameter space.

关键词： new gauge boson new gauge symmetry muon anomalous magnetic moment B meson decay anomalies collider physics

A private SUSY 4HDM with FCNC in the up-sector

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Chinese physics C 2021年第2期45卷 326-340页

作者： M.A.Arroyo-Ureña Lorenzo Díaz-Cruz Bryan O.Larios-López M.A.Pérez de León Facultad de Estudios Superiores Cuautitlan-UNAM Cuautitlan Edo de MexMéxico Mesoamerican Center for Theoretical physics UNACHChiapasMéxico CIFFU and Facultad de Ciencias Físico-Matemáticas Benemérita Universidad Autónoma de Puebla ApdoPostal 1364CP72000PueblaPueMéxico Departamento de Gravitación y Altas Energías Facultad de Ciencias Universidad Nacional Autónoma de Honduras Ciudad UniversitariaTegucigalpa MDCHonduras

We present a SUSY model with four Higgs doublets of the"private type,"in which all fermion types(up,down,and charged leptons)obtain their masses from a different Higgs doublet H_f(f=u_1,d,e) .The conditions for anomaly cancellation imply that the remaining Higgs doublet of the model( H_(u_2) )must have the same hypercharge as H_(u_1) ,and thus,can only couple to up-type quarks,which opens the possibility to have FCNCs only in this *** study the Lagrangian of the model,and in particular,the Higgs potential,to identify the Higgs mass-eigenstates and their interactions;for the Yukawa matrices,we consider the four-texture *** obtain constraints on the model parameters by using LHC measurements on the properties of the 125 GeV Higgs boson(h),and identify viable regions of the parameter ***,these constraints are used to evaluate the prospects for detecting the FCNC decay mode t→ch at the future high-luminosity(HL)option for the LHC,which are compared with current limits from ***,we evaluate the FCNC decay of the next heavier Higgs boson H_(2)→tc ,which can typically reach BR(H_2→tc)≈(10^(-4)-10^(-5)) .The search for the signal at HL-LHC is also studied,and it is found that it may be detectable for specific regions of the model parameter space.

关键词： Higgs physics top quark supersymmetry collider physics

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

Searching for the axion-like particle at the EIC

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Chinese physics C 2023年第4期47卷 155-160页

作者：刘言东岩斌 Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China Institute of High Energy physics Chinese Academy of SciencesBeijing 100049China Theoretical Division Group T-2MS B283Los Alamos National LaboratoryP.O.Box 1663Los AlamosNM 87545USA

The axion-like particle(ALP)is a well motivated new particle candidate for beyond the standard *** this study,we propose to probe the ALP via photon fusion scattering at the upcoming Electron-Ion collider(EIC)with electron and proton energies of E_(e)=20 GeV and E_(p)=250 GeV,*** can constrain the effective coupling strength between the ALP and photons to be 0.2 TeV^(-1)at the 2σconfidence level with an integrated luminosity of 300 fb^(-1)for the mass range m_(a)∈[5,40]*** bounds may be significantly improved if we consider the nucleus beam at the *** also demonstrate that the limits from the EIC can be stronger than the off Zpole measurement at the LEP and light-by-light scattering with pp collisions at the LHC.

关键词： EIC axion-like particle collider physics

What can we learn from the total width of the Higgs boson?

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Chinese physics C 2023年第3期47卷 15-24页

作者：曹庆宏李浩林徐凌霄于江浩 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 CAS Key Laboratory of Theoretical physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Scuola Normale Superiore Piazza dei Cavalieri 756126PisaItaly School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Fundamental physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China International Centre for Theoretical physics Asia-Pacific Beijing/HangzhouChina

As one of the key properties of the Higgs boson, the Higgs total width is sensitive to the global profile ofthe Higgs boson couplings, and thus new physics would modify the Higgs width. We investigate the total width invarious new physics models, including various scalar extensions, composite Higgs models, and the fraternal twinHiggs model. Typically, the Higgs width is smaller than the standard model value due to mixture with other scalarsif the Higgs is elementary, or curved Higgs field space for the composite Higgs. On the other hand, except for thepossible invisible decay mode, the enhanced Yukawa coupling in the two Higgs doublet model or the exotic fermionembeddings in the composite Higgs could enhance the Higgs width greatly. The precision measurement of the Higgstotal width at the high-luminosity LHC can be used to discriminate certain new physics models.

关键词： Higgs collider physics extended scalar model