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Title: Phenomenology of the utilitarian supersymmetric standard model

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Journal Article: Published Article
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Nuclear Physics. B
Additional Journal Information:
Journal Volume: 909; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-06-24 12:21:30; Journal ID: ISSN 0550-3213
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Fraser, Sean, Kownacki, Corey, Ma, Ernest, Pollard, Nicholas, Popov, Oleg, and Zakeri, Mohammadreza. Phenomenology of the utilitarian supersymmetric standard model. Netherlands: N. p., 2016. Web. doi:10.1016/j.nuclphysb.2016.06.012.
Fraser, Sean, Kownacki, Corey, Ma, Ernest, Pollard, Nicholas, Popov, Oleg, & Zakeri, Mohammadreza. Phenomenology of the utilitarian supersymmetric standard model. Netherlands. doi:10.1016/j.nuclphysb.2016.06.012.
Fraser, Sean, Kownacki, Corey, Ma, Ernest, Pollard, Nicholas, Popov, Oleg, and Zakeri, Mohammadreza. 2016. "Phenomenology of the utilitarian supersymmetric standard model". Netherlands. doi:10.1016/j.nuclphysb.2016.06.012.
title = {Phenomenology of the utilitarian supersymmetric standard model},
author = {Fraser, Sean and Kownacki, Corey and Ma, Ernest and Pollard, Nicholas and Popov, Oleg and Zakeri, Mohammadreza},
abstractNote = {},
doi = {10.1016/j.nuclphysb.2016.06.012},
journal = {Nuclear Physics. B},
number = C,
volume = 909,
place = {Netherlands},
year = 2016,
month = 8

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Publisher's Version of Record at 10.1016/j.nuclphysb.2016.06.012

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  • A remarkabale U(1) gauge extension of the supersymmetric standard model was proposed 8 years ago. It is anomaly free, has no {mu} term, and conserves baryon and lepton numbers automatically. The phenomenology of a specific version of this model is discussed. In particular, leptoquarks are predicted, with couplings to the heavy singlet neutrinos, the scalar partners of which may be components of dark matter. The Majorana neutrino mass matrix itself may have two zero subdeterminants.
  • We provide a detailed description of the Fortran code CPsuperH, a newly-developed computational package that calculates the mass spectrum and decay widths of the neutral and charged Higgs bosons in the Minimal Supersymmetric Standard Model with explicit CP violation. The program is based on recent renormalization-group-improved diagrammatic calculations that include dominant higher-order logarithmic and threshold corrections, b-quark Yukawa-coupling resummation effects and Higgs-boson pole-mass shifts. The code CPsuperH is self-contained (with all subroutines included), is easy and fast to run, and is organized to allow further theoretical developments to be easily implemented. The fact that the masses and couplings of themore » charged and neutral Higgs bosons are computed at a similar high-precision level makes it an attractive tool for Tevatron, LHC and LC studies, also in the CP-conserving case.« less
  • We make a comprehensive study of the theory and phenomenology of a low-energy supersymmetric standard model originating from a string-inspired E{sub 6} grand unified gauge group. The exceptional supersymmetric standard model (ESSM) considered here is based on the low-energy standard model gauge group together with an extra Z{sup '} corresponding to an extra U(1){sub N} gauge symmetry under which right-handed neutrinos have zero charge. The low-energy matter content of the ESSM corresponds to three 27 representations of the E{sub 6} symmetry group, to ensure anomaly cancellation, plus an additional pair of Higgs-like doublets as required for high-energy gauge coupling unification.more » The ESSM is therefore a low-energy alternative to the minimal supersymmetric standard model (MSSM) or next-to-minimal supersymmetric standard model (NMSSM). The ESSM involves extra matter beyond the MSSM contained in three 5+5* representations of SU(5), plus three SU(5) singlets which carry U(1){sub N} charges, one of which develops a vacuum expectation value, providing the effective {mu} term for the Higgs doublets, as well as the necessary exotic fermion masses. We explore the renormalization group flow of the ESSM and examine theoretical restrictions on the values of new Yukawa couplings caused by the validity of perturbation theory up to the grand unification scale. We then discuss electroweak symmetry breaking and Higgs phenomenology and establish an upper limit on the mass of the lightest Higgs particle which can be significantly heavier than in the MSSM and NMSSM, in leading two-loop approximation. We also discuss the phenomenology of the Z{sup '} and the extra matter, whose discovery will provide a smoking gun signal of the model.« less