All Results

Subjects:

We examine various direct and indirect constraints on the lepton-specific two-Higgs doublet model and scrutinize the property of the Higgs bosons in the allowed parameter space. These constraints come from the precision electroweak data, the direct search |

submitted time
2016-12-28
Hits*2967*，
Downloads*1764*，
Comment
*0*

The Minimal Solution to the mu/B_mu Problem in Gauge Mediation

Kang,Z; Li,T; Liu,T; Yang,JMSubjects:

We provide a minimal solution to the mu/B_mu problem in the gauge mediated supersymmetry breaking by introducing a Standard Model singlet filed S with a mass around the messenger scale which couples to the Higgs and messenger fields. This singlet is nearl |

submitted time
2016-12-28
Hits*1970*，
Downloads*1091*，
Comment
*0*

A Heavy SM-like Higgs and a Light Stop from Yukawa-Deflected Gauge Mediation

Kang,Z; Li,T; Liu,T; Tong,C; Yang,JMSubjects:

To obtain a SM-like Higgs boson around 125 GeV in the Minimal Supersymmetric Standard Model with minimal gauge mediation of supersymmetry breaking (GMSB), a heavy stop at multi-TeV level is needed and incurs severe fine-tuning, which can be ameliorated in |

submitted time
2016-12-28
Hits*2202*，
Downloads*1241*，
Comment
*0*

Natural SUSY from SU(5) Orbifold GUT

Han,C; Wang,F; Yang,JMSubjects:

We propose a realistic 5D orbifold GUT model that can reduce to natural (or radiative natural) supersymmetry as the low energy effective theory. Supersymmetry as well as gauge symmetry are broken by the twist boundary conditions. We find that it is non-trivial to introduce other flavor symmetry other than the SU(2)R R-symmetry. We ameliorate the tension between the small number of free parameters and the successful electroweak symmetry breaking by introducing non-minimal Kahler potentials. A large trilinear term At, which is necessary to give a 125 GeV Higgs boson, is naturally provided in our scenario. A scan under current experimental constraints shows that our model can realize natural (or radiative natural) supersymmetry. Only radiative natural supersym- metry can naturally lead to 125 GeV higgs. Additional dark matter species other than neutralino(like axion) are needed to provide enough relic density. Relatively large stop masses are necessary to give realistic higg mass in most of the parameter spaces. |

submitted time
2016-12-28
Hits*1952*，
Downloads*1111*，
Comment
*0*

Current experimental bounds on stop mass in natural SUSY

Han,C; Hikasa,K; Wu,L; Yang,JM; Zhang,YSubjects:

Motivated by the recent progress of direct search for the productions of stop pair and sbottom pair at the LHC, we examine the constraints of the search results on the stop (t ? ) mass in natural SUSY. We first scan the parameter space of natural SUSY in the framework of MSSM, considering the constraints from the Higgs mass, B-physics and electroweak precision measurements. Then in the allowed parameter space we perform a Monte Carlo simulation for stop pair production followed by t ? → tχ ?0 or t ? → bχ ?+ and sbottom pair production followed by ?b → bχ ?0 or ?b → tχ ??. 1111 1111 Using the combined results of ATLAS with 20.1 fb?1 from the search of l + jets + E/ T , hadronic tt ?+E/T and 2b+E/T, we find that a stop lighter than 600 GeV can be excluded at 95% CL in this scenario. |

submitted time
2016-12-28
Hits*2129*，
Downloads*1216*，
Comment
*0*

Full one-loop electroweak corrections to e+e?→ZHγe+e?→ZHγe^+e^- \to ZH\gamma at a Higgs factory

Liu,N; Ren,J; Wu,L; Wu,P; Yang,JMSubjects:

Motivated by the future precision test of the Higgs boson at an e+e?e+e?e^+e^- Higgs factory, we calculate the production e+e?→ZHγe+e?→ZHγe^+e^- \to ZH\gamma in the Standard Model with complete next-to-leading order electroweak corrections. We find that f |

submitted time
2016-12-28
Hits*1909*，
Downloads*1106*，
Comment
*0*

Pseudo-goldstino and electroweak gauginos at the LHC

Hikasa,K; Liu,T; Wang,L; Yang,JMSubjects:

The multi-sector SUSY breaking predicts the existence of pseudo-goldstino, which could couple more strongly to visible fields than ordinary gravitino. Then the lightest neutralino and chargino can decay into a pseudo-goldstino plus a Z-boson, Higgs boson |

submitted time
2016-12-28
Hits*1901*，
Downloads*1049*，
Comment
*0*

hhh Coupling in SUSY Models after LHC Run I

Wu,L; Yang,JM; Yuan,C; Zhang,MSubjects:

We examine the Higgs triple coupling in MSSM and NMSSM under current constraints, which include the LHC measurements, Higgs data, B physics, electroweak precision observables, relic density and so on. The ratio λMSSMhhh/λSMhhhλhhhMSSM/λhhhSM\lambda^{\rm M |

submitted time
2016-12-28
Hits*1743*，
Downloads*1051*，
Comment
*0*

Yukawa corrections to top pair production in photon-photon collision

Li,C; Yang,J; Zhu,Y; Zhou,HSubjects:

The O(αmt 2/mW 2)O(αmt 2/mW 2)O(\alpha m_t~2/m_W~2) Yukawa corrections to top pair production in photon-photon collision are calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM) as well as the minimal supersymmetric model (MSS |

Supersymmetric electroweak corrections to single top quark production at the Fermilab Tevatron

Li,CS; Oakes,RJ; Yang,JMSubjects:

We have calculated the O(αewMt 2/MW 2)O(αewMt 2/MW 2)O(\alpha_{ew} M_t~2/M_W~2) supersymmetric electroweak corrections to single top quark production via qq?′→tb?qq?′→tb?q\bar q' \to t\bar b at the Fermilab Tevatron in the minimal supersymmetric model. Th |