We investigate the one-loop contributions to the mass of the SM-like Higgs boson in the MSSM considering the effect of slepton flavor mixing, which is parametrized by the dimensionless parameter δXY(X, Y = L, R) in t...We investigate the one-loop contributions to the mass of the SM-like Higgs boson in the MSSM considering the effect of slepton flavor mixing, which is parametrized by the dimensionless parameter δXY(X, Y = L, R) in the slepton mass matrices. For the surviving samples under the experimental constraints, we calculate the corrections to the mass of the SM-like Higgs boson in terms of δXY. We find that the mass correction ?mhcan even be larger than 10 GeV for large δRLor δLR. Moreover, ?mhhas strong sensitivity to δRLor δLR, while the weak sensitivity to δLLor δRR, sinceδRLor δLRenters directly into the coupling of Higgs boson with sleptons in the calculations of Higgs boson self-energies.展开更多
The Circular Electron Positron Collider(CEPC)is designed to operate at key center-of-mass energies:91.2 GeV as a Z factory for precision Z boson studies,≈160 GeV at the threshold for W boson pair production,and 240 G...The Circular Electron Positron Collider(CEPC)is designed to operate at key center-of-mass energies:91.2 GeV as a Z factory for precision Z boson studies,≈160 GeV at the threshold for W boson pair production,and 240 GeV as a Higgs factory for copious Higgs boson production.It can be upgraded to 360 GeV(CEPC-360 GeV)for enabling top quark-antiquark(tt)pair production.Beyond enabling high-precision measurements of the Standard Model(SM),CEPC-360 GeV is uniquely positioned to perform searches for new physics beyond the SM(BSM),serving as a valuable complement to hadron colliders.This paper presents a sensitivity study on the direct pair production of staus and smuons at the CEPC with√s=360 GeV,conducted via full Monte Carlo simulation.Under the assumptions of 1.0 ab^(−1)integrated luminosity and a flat 5%systematic uncertainty,CEPC-360 GeV could potentially discover the combined production of left-handed and right-handed staus up to a mass of 170 GeV(if they exist)or up to 169 for pure left-handed staus and 162 GeV for pure right-handed staus.For direct smuon production,the discovery potential reaches up to 178 GeV under the same conditions.展开更多
基金Supported in part by the National Natural Science Foundation of China(NNSFC)under Grant Nos.11247268,11305050Specialized Research Fund for the Doctoral Program of Higher Education with Grant No.20124104120001
文摘We investigate the one-loop contributions to the mass of the SM-like Higgs boson in the MSSM considering the effect of slepton flavor mixing, which is parametrized by the dimensionless parameter δXY(X, Y = L, R) in the slepton mass matrices. For the surviving samples under the experimental constraints, we calculate the corrections to the mass of the SM-like Higgs boson in terms of δXY. We find that the mass correction ?mhcan even be larger than 10 GeV for large δRLor δLR. Moreover, ?mhhas strong sensitivity to δRLor δLR, while the weak sensitivity to δLLor δRR, sinceδRLor δLRenters directly into the coupling of Higgs boson with sleptons in the calculations of Higgs boson self-energies.
基金Supported by the State Key Program of National Natural Science of China(2018YFA0404000,12135013)。
文摘The Circular Electron Positron Collider(CEPC)is designed to operate at key center-of-mass energies:91.2 GeV as a Z factory for precision Z boson studies,≈160 GeV at the threshold for W boson pair production,and 240 GeV as a Higgs factory for copious Higgs boson production.It can be upgraded to 360 GeV(CEPC-360 GeV)for enabling top quark-antiquark(tt)pair production.Beyond enabling high-precision measurements of the Standard Model(SM),CEPC-360 GeV is uniquely positioned to perform searches for new physics beyond the SM(BSM),serving as a valuable complement to hadron colliders.This paper presents a sensitivity study on the direct pair production of staus and smuons at the CEPC with√s=360 GeV,conducted via full Monte Carlo simulation.Under the assumptions of 1.0 ab^(−1)integrated luminosity and a flat 5%systematic uncertainty,CEPC-360 GeV could potentially discover the combined production of left-handed and right-handed staus up to a mass of 170 GeV(if they exist)or up to 169 for pure left-handed staus and 162 GeV for pure right-handed staus.For direct smuon production,the discovery potential reaches up to 178 GeV under the same conditions.
