共查询到20条相似文献,搜索用时 15 毫秒
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The CP-violating effects to the subprocess gg → H H- are studied in the mSUGRA scenario at the CERN large hadron collider, by taking into account the experimental bounds of electron and neutron electric dipole moments.The CP-violating effects in this process are related to the complex phases ofμ and Af in the mSUGRA scenario. In our calculation we consider smallCP phases ofμ and Af and neglect the effects of neutral Higgs boson mixing. In this case the CP effects to the process mainly come from the complex couplings of Higgs-squark-squark. We find a strong dependence of charged Higgs boson pair production rate on the complex couplings in the parameter space of minimal supersymmetric standard model`` 相似文献
3.
The CP-violating effects to the subprocess gg→H+H- are studied in the mSUGRA scenario at the CERN large hadron collider, by taking into account the
experimental bounds of electron and neutron electric dipole moments.
The CP-violating effects in this process are related to the complex phases of μ and Af in
the mSUGRA scenario. In our calculation we consider small CP phases of
μ and Af and neglect the effects of neutral Higgs boson mixing.
In this case the CP effects to the process mainly come from the complex
couplings of Higgs-squark-squark. We find a strong dependence of
charged Higgs boson pair production rate on the complex couplings
in the parameter space of minimal supersymmetric standard model. 相似文献
4.
LIU Yao-Bei WANG Xue-Lei HAN Hong-Mei CAO Yong-Hua 《理论物理通讯》2008,49(4):977-980
The twin Higgs mechanism has recently been proposed to solve the little hierarchy problem. In the context of the left-right twin Higgs (LRTH) model, we discuss single production of the new charged gauge boson WH^- , which is predicted by the left-right twin Higgs model, in association with top quark at the CERN Large Hadron Collider (LHC). It is found that, for a typical nonzero value of mass mixing parameter M = 150 GeV in the LRTH model, the production cross section is in the range of 3 ×10^-2 - 6.07×10^3 fb at the LHC. As long as the WH^- is not too heavy, the possible signatures of the heavy charged gauge boson might be detected at the LHC experiments. 相似文献
5.
In the parameter space allowed by the electroweak precision measurement data, we consider the contributions of the new
particles predicted by the littlest Higgs model to the Higgs boson associated production with top quark pair in the future high energy linear
e+e- collider (ILC). We find that the
contributions mainly come from the new gauge bosons ZH and
BH. For reasonable values of the free parameters, the
absolute value of the relative correction parameter
δσ/σSM can be significanly large, which might
be observed in the future ILC experiment with √{S}=800 GeV. 相似文献
6.
We investigated the neutral Higgs boson pair
production at the CERN Large Hadron Collider (LHC) in the SM with
four families. We found that the gluon-gluon fusion mode is the
most dominant one in producing neutral Higgs boson pair at the
LHC, and it can be used to probe the trilinear Higgs coupling. If
the heavy quarks of the fourth generation really exist within the
SM, they can manifest their effect on the cross section of the
Higgs pair production process at the LHC. Our numerical results
show that there will be 2×104 neutral Higgs boson pair
production events per year if the next generation heavy quarks
really exist, while there will be only 2×103 events
produced per year if there are only three families in the SM. 相似文献
7.
Single Boson Realizations of the Higgs Algebra 总被引:1,自引:0,他引:1
We obtained for the Higgs algebra three kinds of single boson realizations such as the unitary Holstein-Primakoff-like realization, the non-unitary Dyson-like realization, and the unitary Villain-like realization. The corre-sponding similarity transformations between the Holstein-Primakoff-like realizations and the Dyson-like realizations are given. 相似文献
8.
In this paper,we investigate the production of a pair of doubly charged leptons associated with a gauge boson V(γ or Z) at future linear colliders via e~+e~-and γγ collisions.The numerical results show that the possible signals of the doubly charged leptons may be detected via the processes e~+e~→VX~(++)X~(--)and γγ→VX~(++)X~(--)at future ILC or CLIC experiments. 相似文献
9.
RUANDong WUChu SUNHong-Zhou 《理论物理通讯》2003,40(1):73-76
We obtained for the Higgs algebra three kinds of single boson realizations such as the unitary Holstein-Primakoff-like realization, the non-unitary Dyson-like realization, and the unitary Villain-like realization. The corre-sponding similarity transformations between the Holstein-Primakoff-like realizations and the Dyson-like realizations are given. 相似文献
10.
We calculate one-loop R-parity-violating coupling corrections to
the processes H-→τντ and
H-→bt. We find that the corrections to the
H-→τντ decay mode are generally about
0.1%, and can be negligible. But the corrections to the
H-→bt decay mode can reach a few percent for
the favored parameters. 相似文献
11.
ZHANG Yang 《理论物理通讯》1998,30(4):603-608
We study the energy conditions of a relativistic λΦ4 self-interact& charged boson condensate coupled to degenerate fermions. It is found that strong energy condition will be violated within certain range of the mass parameters and the coupling constants in the model. 相似文献
12.
LIU Yao-Bei SHEN Jie-Fen CUI Xiao-Min REN Xiao-Yan 《理论物理通讯》2008,49(5):1279-1282
The littlest Higgs (LH) model is the most economical one among various little Higgs models, which predicts the existence of the charged scalars Φ^±. In this paper, we study the production of the charged Higgs boson Φ^- with single top quark via the process gb →tΦ^- at the CERN Large Hadron Collider (LHC). The numerical results show that the production cross section is sma/ler than 0.2 pb in most of the parameters space, it is very difficult to observe the signatures of the charged scalars via the process pp → gb + X → tΦ^- + X at the LHC experiments. However, it can open a window to distinguish the top-pions in the TC2 model or charged Higgs in the MSSM from Φ^±. 相似文献
13.
In the littlest Higgs Model with T-parity,we discuss the Higgs production in association with bottom quarks at the LHC and future electron-positron collider.We calculate the cross sections of production channels pp→bb H,bb→H and bg→b H at 14 Te V LHC and the cross sections of production channel e~+e~-→bb H in(un)polarized beams at the lowest order.In order to investigate the observability,we display some typical final state distributions in the Higgs to diphoton channel. 相似文献
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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. 相似文献
16.
At the CERN large hadron collider (LHC), production of the Higgs boson in association with Z or W bosons provides a dramatic experimental signal for detecting the standard model (SM) Higgs boson. In this paper, we consider the contributions of the left-right twin Higgs (LRTH) model to the processes q\bar{q}→Z(W)H. Our numerical results show that, in the favorable parameter spaces, the cross sections deviate distinctly from the predictions
of the SM. The possible signals of the LRTH model can be detected via these processes at the LHC experiments. 相似文献
17.
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 Δmh can even be larger than 10 GeV for large δRL or δLR. Moreover, Δmh has strong sensitivity to δRL or δLR, while the weak sensitivity to δLL or δRR, since δRL or δLR enters directly into the coupling of Higgs boson with sleptons in the calculations of Higgs boson self-energies. 相似文献
18.
In this paper we investigate the effects of the large extra dimensions on the two processes
e+e-→
H0Z0Z0 and e+e-→ H0Z0Z0 at linear colliders in both unpolarized and polarized collision modes. We
find that the virtual Kaluza-Klein graviton exchange can significantly enhance the cross section from their standard model expectations for these two processes. The results show that the
LED effect on the process
e+e-→
H0Z0Z0
allows the observation limits on
the effective scale MS to be probed up to 9.75 TeV and 10.1 TeV
in the unpolarized and
+-(λe+=1/2,
λe-=-1/2) polarized beam collision modes (with
Pe+=0.6,
Pe-=0.8), respectively. For the process
e+e-→
H0Z0Z0, these limits on MS can be
probed up to 6.06 TeV and 6.38 TeV in the unpolarized and polarized
collision modes separately. We find that the λe+=1/2,
λe-=-1/2 polarization collision mode in both
process e+e-→ H0Z0Z0 and e+e-→ H0Z0Z0
may provide a possibility to improve the
sensitivity in probing the LED effects. 相似文献
19.
In light of the recently obtained LHC Higgs data, we examine the parameter space of the type II twoHiggs-doublet model, in which the 125 GeV Higgs bosons exhibit wrong sign Yukawa couplings. Combining the relevant theoretical and experimental limits, we find that the LHC Higgs data exclude most of the parameter space of the wrong sign Yukawa coupling. For m_H 600 GeV, the allowed samples are mainly distributed across several corners and narrow bands of m_A 20 GeV, 30 m_A 120 GeV, 240 GeV m_A 300 GeV, 380 GeV m_A 430 GeV, and480 GeV m_A 550 GeV. For m_A 600 GeV, m_H is required to be lower than 470 GeV. The light pseudo-scalar with a mass of 20 GeV is still permitted in the case of the wrong sign Yukawa coupling of 125 GeV Higgs bosons. 相似文献
20.
In this study, Higgs and Z boson associated production with subsequent decay is attempted in the framework of alternative left-right model, which is motivated by superstring-inspired E_6 model at CEPC and future linear colliders. We systematically analyze each decay channel of Higgs with theoretical constraints and latest experimental methods. Due to the mixing of scalars in the Higgs sector, charged Higgs bosons can play an essential role in the phenomenological analysis of this process. Even though the predictions of this model for the signal strengths of this process are close to the standard model expectations, it can be distinct under high luminosity. 相似文献