分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：Cosmic ray anomalies observed by PAMELA and Fermi-LAT experiments may be interpreted by heavy (TeV-scale) dark matter annihilation enhanced by Sommerfeld effects mediated by a very light (sub-GeV) U(1)_X gauge boson, while the recent direct searches from
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：We propose semi-direct Gauge-Yukawa mediation of supersymmetry (SUSY) breaking. The messenger fields mediating SUSY breaking to the visible sector do not directly couple with the goldstino field, and instead they have gauge and Yukawa interactions with so
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：The maximal U(1)LU(1)LU(1)_L supersymmetric inverse seesaw mechanism (MLSIS) provides a natural way to relate asymmetric dark matter (ADM) with neutrino physics. In this paper we point out that MLSIS is a natural outcome if one dynamically realizes the in
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：As the most important discovery channel for a light Higgs boson at the LHC, the di-photon signal gg→h→γγ is sensitive to underlying physics. In this work we investigate such a signal in a comparative way by considering three different supersymmetric model
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：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
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：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
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：If supersymmetry is broken independently in multiple sectors with different scales, a number of goldstinos will be generated. One linear combination of these goldstinos is massless and eaten by the gravitino, while the orthogonal combinations acquire a tr
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：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
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：The multi-sector SUSY breaking predicts pseudo-goldstino which can couple to the visible sector more strongly than the ordinary gravitino and thus induce the decays of the lightest neutralino and chargino (collectively called electroweakinos) inside the d
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