MSSM with Dimension-five Operators (MSSM_5)

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dc.creatorAntoniadis, I.
dc.creatorDudas, E.
dc.creatorGhilencea, D. M.
dc.creatorTziveloglou, P.
dc.date2008-06-23
dc.date2008-09-29
dc.date.accessioned2026-07-07T11:51:57Z
dc.date.available2026-07-07T11:51:57Z
dc.descriptionWe perform a general analysis of the R-parity conserving dimension-five operators that can be present beyond the Minimal Supersymmetric Standard Model. Not all these operators are actually independent. We present a method which employs spurion-dependent field redefinitions that removes this "redundancy" and establishes the minimal, irreducible set of these dimension-five operators. Their potential effects on the MSSM Higgs sector are discussed to show that the tree level bound $m_h\leq m_Z$ cannot be easily lifted within the approximations used, and quantum corrections are still needed to satisfy the LEPII bound. An ansatz is provided for the structure of the remaining couplings in the irreducible set of D=5 operators, which avoids phenomenological constraints from flavor changing neutral currents. The minimal set of operators brings new couplings in the effective Lagrangian, notably "wrong"-Higgs Yukawa couplings and contact fermion-fermion-scalar-scalar interactions, whose effects are expected to be larger than those generated in the MSSM at loop or even tree level. This has implications in particular for LHC searches for supersymmetry by direct squark production.
dc.description42 pages, LaTeX; (added references, corrected typos)
dc.identifierhttps://arxiv.org/abs/0806.3778
dc.identifierhttp://arxiv.org/abs/0806.3778
dc.identifierNucl.Phys.B808:155-184,2009
dc.identifierdoi:10.1016/j.nuclphysb.2008.09.019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204066
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleMSSM with Dimension-five Operators (MSSM_5)
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