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By Ignatios Antoniadis, Dumitru Ghilencea

Supersymmetry (SUSY) is a brand new symmetry that relates bosons and fermions, which has robust aid at either the mathematical and the actual point. This e-book bargains a finished evaluate, following the improvement of SUSY from its very early days as much as current. The order of the contributions should still give you the reader with the old improvement in addition to the most recent theoretical updates and interpretations, and experimental constraints from particle accelerators and darkish subject searches. it's a nice excitement to compile the following contributions from authors who initiated or have contributed considerably to the improvement of this thought over such a lot of years. to give a balanced perspective, the ebook additionally contains a ultimate contribution that makes an attempt to explain the physics past the normal version within the absence of SUSY.

The contributions to this ebook were formerly released within the eu actual magazine C - debris and Fields.

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It must get reduced to R-parity, so that gluinos, in particular, can acquire a mass. This also applies to the gravitino, and to gravityinduced supersymmetry-breaking terms including gaugino mass terms [44,45,64–67]. (We leave aside the possibility of Dirac gluinos [7] considered in Sect. 2 and in theories with extra dimensions [16–18] as discussed in Sect. ) Indeed massless or light gluinos would combine with quarks, antiquarks and gluons to form light R-hadrons, R-mesons gq ˜ q¯ and R-baryons gqqq ˜ [4,7,68].

2 Three possible EW SUSY mass spectra depending of the relative values of the M1 , M2 , and μ parameters Fig. e. soft or hard objects in the final state. The third MSSM theory unknown is the status of R-parity. In a plain vanilla MSSM scenario R-parity is conserved (RPC), but it could well be violated (RPV) or even a continuous symmetry. It is important to mention that in the huge MSSM phase space long-lived particles decaying within the detector or even outside often exist. This situation could arise from the low mass difference between two sparticles in the spectrum, very weak coupling to the LSP, very small R-parity Yukawa couplings, etc.

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