Constraints of chromoelectric dipole moments to natural SUSY type sfermion spectrum
Constraints of chromoelectric dipole moments to natural SUSY type sfermion spectrum
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色电偶极矩对天然 SUSY 型费米子谱的约束
DOI：
10.1103/physrevd.95.115021
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发表时间：
2017-02
影响因子：
5
通讯作者：
Shigekami Yoshihiro
中科院分区：
文献类型：
--
作者：
Maekawa Nobuhiro;Muramatsu Yu;Shigekami Yoshihiro
我们从自然 SUSY 型斯费米子质谱中色电偶极矩 (CEDM) 的约束来研究斯费米子质量的下界，其中停止质量 $m_{\tilde t}$ 远小于其他斯费米子质量 $m_0$。由于前两代费米子质量较大，超对称（SUSY）变味中性电流（FCNC）受到抑制，并且由于光阑，弱尺度得以稳定，因此对天然SUSY型费米子质谱进行了研究。然而，这种类型的费米子质谱受到CEDM的严重约束，因为光阑对上夸克CEDM的贡献在极限$m_0\rightarrow\infty$中没有解耦，而下夸克CEDM在极限中解耦。重要的是，即使 SUSY 断裂参数（和 higgsino 质量）被视为真实，约束也是严格的，因为来自复杂 Yukawa 耦合的 Yukawa 矩阵的复杂对角化矩阵会在费米子质量矩阵的非对角元素中生成非零 CP 相。我们在最小SUSY标准模型中数值计算了上夸克和下夸克的CEDM，并给出了停止质量和其他费米子质量的下界。我们表明，停止质量的下限变为 7 TeV，以满足 Hg EDM 的 CEDM 约束。如果认真考虑弱尺度稳定性，结果是不可接受的。我们证明，如果上型汤川耦合在大统一尺度上被视为真实，即使 $m_{\tilde t}\sim 1$ TeV 也满足 CEDM 约束。
We investigate the lower bounds of sfermion masses from the constraints of chromo-electric dipole moment (CEDM) in the natural SUSY type sfermion mass spectrum, in which stop mass $m_{\tilde t}$ is much smaller than the other sfermion masses $m_0$. The natural SUSY type sfermion mass spectrum has been studied since the supersymmetric (SUSY) flavor changing neutral currents (FCNC) are suppressed because of large sfermion masses of the first two generations, and the weak scale is stabilized because of the light stop. However, this type of sfermion mass spectrum is severely constrained by CEDM, because the light stop contributions to the up quark CEDM are not decoupled in the limit $m_0\rightarrow\infty$, while the down quark CEDM is decoupled in the limit. It is important that the constraints are severe even if SUSY breaking parameters (and higgsino mass) are taken to be real because complex diagonalizing matrices of Yukawa matrices, which are from complex Yukawa couplings, generate non-vanishing CP phases in off-diagonal elements of sfermion mass matrices. We calculate the CEDM of up and down quarks numerically in the minimal SUSY standard model, and give the lower bounds for stop mass and the other sfermion masses. We show that the lower bound of stop mass becomes 7 TeV to satisfy the CEDM constraints from Hg EDM. The result is not acceptable if the weak scale stability is considered seriously. We show that if the up-type Yukawa couplings are taken to be real at the grand unification scale, the CEDM constraints are satisfied even if $m_{\tilde t}\sim 1$ TeV.
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DOI：
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发表时间：
2012-12
期刊：
arXiv: High Energy Physics - Phenomenology
影响因子：
--
作者：
N. Arkani-Hamed;Arpit Gupta;D. Kaplan;N. Weiner;Tom Zorawski
通讯作者：
N. Arkani-Hamed;Arpit Gupta;D. Kaplan;N. Weiner;Tom Zorawski
DOI：
--
发表时间：
2008-06
期刊：
arXiv: Nuclear Experiment
影响因子：
--
作者：
M. Ku'zniak;I. Altarev;G. Ban;G. Bison;K. Bodek;M. Burghoff;M. Daum;K. Eberhardt;P. Fierlinger;E. Gutsmiedl;G. Hampel;W. Heil;R. Henneck;N. Khomutov;K. Kirch;S. Kistryn;S. Knappe-Grueneberg;A. Knecht;P. Knowles;J. Kratz;T. Lauer;B. Lauss;T. Lefort;A. Mtchedlishvili;O. Naviliat‐Cuncic;S. Paul;A. Pazgalev;G. Petzold;C. Plonka-Spehr;G. Qu'em'ener;D. Rebreyend;S. Roccia;G. Rogel;T. Sander-Thoemmes;A. Schnabel;N. Severijns;Y. Sobolev;R. Stoepler;L. Trahms;M. Tur;A. Weis;N. Wiehl;J. Zejma;G. Zsigmond
通讯作者：
M. Ku'zniak;I. Altarev;G. Ban;G. Bison;K. Bodek;M. Burghoff;M. Daum;K. Eberhardt;P. Fierlinger;E. Gutsmiedl;G. Hampel;W. Heil;R. Henneck;N. Khomutov;K. Kirch;S. Kistryn;S. Knappe-Grueneberg;A. Knecht;P. Knowles;J. Kratz;T. Lauer;B. Lauss;T. Lefort;A. Mtchedlishvili;O. Naviliat‐Cuncic;S. Paul;A. Pazgalev;G. Petzold;C. Plonka-Spehr;G. Qu'em'ener;D. Rebreyend;S. Roccia;G. Rogel;T. Sander-Thoemmes;A. Schnabel;N. Severijns;Y. Sobolev;R. Stoepler;L. Trahms;M. Tur;A. Weis;N. Wiehl;J. Zejma;G. Zsigmond
影响因子：
--
作者：
T. Kugo;J. Sato
通讯作者：
T. Kugo;J. Sato
影响因子：
5
作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
通讯作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
DOI：
10.1016/j.nuclphysb.2012.01.001
发表时间：
2011-08
期刊：
Nuclear Physics
影响因子：
--
作者：
G. Giudice;A. Strumia
通讯作者：
G. Giudice;A. Strumia