The primary objective of experiments at high energy colliders is to search for and identify new physics beyond the Standard Model of particle physics. Signals may appear directly, in the form of new particles, or indirectly, as a low-energy manifestation of some new physics whose threshold lies at higher energies. In the latter case, new physics effects can be systematically described by effective operators of mass-dimensions higher than 4, scaled by inverse powers of the higher mass cutoff. Most analyses consider only dimension-6 operators, but neutral triple gauge couplings (nTGCs) provide a unique new physics window through dimension-8 operators. Ellis, He and Xiao have proposed in their work a novel approach to probing the nTGCs at the planned future e+e− colliders, including CEPC, FCC-ee, ILC, and CLIC. They found that a new set of pure gauge operators of dimension-8 generate both ZγZ* and Zγγ* vertices that can be probed sensitively via the reaction e+e−→Zγ with hadronic Z decays. These operators have rapid energy dependence ~E5 and provide sensitivity reaches to new physics scales up into the multi-TeV regime, far beyond the reach of the direct searches at the same collider, motivating further detector level simulations to probe the nTGCs. Paraphrasing the words of Sun Tzu: 「... there are ... two methods of (searching for new physics), the direct and the indirect; ... who can exhaust the possibilities of their combination?」 (See the article (No. 221062) by John Ellis et al.).
Editor’s Focus
A novel approach to probing new physics with neutral Gauge Boson couplingsSci. China-Phys. Mech. Astron. 64(2), 221061 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1633-xProbing new physics in dimension-8 neutral gauge couplings at e+e− colliders
John Ellis, Hong-Jian He, and Rui-Qing XiaoSci. China-Phys. Mech. Astron. 64(2), 221062 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1617-3News on the physics potential of the reaction e+e−→Zγ
Philipp Roloff
Sci. China-Phys. Mech. Astron. 64(2), 221063 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1630-xProbing New Physics at future electron positron Higgs factories via e+e−→Zγ process
ManQi Ruan
Sci. China-Phys. Mech. Astron. 64(2), 221064 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1631-0A novel probe of new physics in e+e−→Zγ
Veronica Sanz
Sci. China-Phys. Mech. Astron. 64(2), 221065 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1632-7Invited Review
Partially coherent vortex beams: Fundamentals and applications
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http://engine.scichina.com/doi/10.1007/s11433-020-1629-x
Contrasting physicalproperties of the trilayer nickelates Nd4Ni3O10 and Nd4Ni3O8
Qing Li, ChengPing He, XiYu Zhu, Jin Si, XinWei Fan, and Hai-Hu WenSci. China-Phys. Mech. Astron. 64(2), 227411 (2021)
https://engine.scichina.com/doi/10.1007/s11433-020-1613-3
Current-driven transformations of a skyrmion tube and a bobber in stepped nanostructures of chiral magnets
Jin Zhu, YaoDong Wu, QiYang Hu, LingYao Kong, Jin Tang, MingLiang Tian, and HaiFeng Du
Sci. China-Phys. Mech. Astron. 64(2), 227511 (2021)http://engine.scichina.com/doi/10.1007/s11433-020-1619-8
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