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Title: Neutral Naturalness from Orbifold Higgs Models

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Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
SC0010008; ARRA-SC0003883; SC0007897; AC02-05CH11231
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 6; Related Information: CHORUS Timestamp: 2016-12-23 14:34:08; Journal ID: ISSN 0031-9007
American Physical Society
Country of Publication:
United States

Citation Formats

Craig, Nathaniel, Knapen, Simon, and Longhi, Pietro. Neutral Naturalness from Orbifold Higgs Models. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.061803.
Craig, Nathaniel, Knapen, Simon, & Longhi, Pietro. Neutral Naturalness from Orbifold Higgs Models. United States. doi:10.1103/PhysRevLett.114.061803.
Craig, Nathaniel, Knapen, Simon, and Longhi, Pietro. 2015. "Neutral Naturalness from Orbifold Higgs Models". United States. doi:10.1103/PhysRevLett.114.061803.
title = {Neutral Naturalness from Orbifold Higgs Models},
author = {Craig, Nathaniel and Knapen, Simon and Longhi, Pietro},
abstractNote = {},
doi = {10.1103/PhysRevLett.114.061803},
journal = {Physical Review Letters},
number = 6,
volume = 114,
place = {United States},
year = 2015,
month = 2

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.114.061803

Citation Metrics:
Cited by: 37works
Citation information provided by
Web of Science

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  • Supersymmetric gauge theories, in higher dimensions compactified in an orbifold, give a natural framework to unify the gauge bosons, Higgs fields, and even the matter fields in a single multiplet of the unifying gauge symmetry. The extra dimensions and the supersymmetry are the two key ingredients for such an unification. In this work, we investigate various scenarios for the unification of the three gauge couplings and the Yukawa couplings in the minimal supersymmetric standard model (MSSM), as well as the trilinear Higgs couplings {lambda} and {kappa} of the nonminimal supersymmetric standard model (NMSSM). We present an SU(8) model in sixmore » dimensions with N=2 supersymmetry, compactified in a T{sup 2}/Z{sub 6} orbifold which unifies the three gauge couplings with {lambda} and {kappa} of NMSSM. Then we present an SU(9) model in 6D, which, in addition, includes partial unification of Yukawa couplings, either for the up-type (top quark and Dirac tau neutrino) or down-type (bottom quark and tau lepton). We also study the phenomenological implications of these various unification scenarios using the appropriate renormalization group equations and show that such unification works very well with the measured low energy values of the couplings. The predicted upper bounds for the lightest neutral Higgs boson mass in our model is higher than those in MSSM but lower than those in the general NMSSM (where the couplings {lambda} and {kappa} are arbitrary). Some of the predictions of our models can be tested in the upcoming Large Hadron Collider.« less
  • We examine for standardlike orbifold compactification models the constraints due to quark and lepton generation nonuniversality of soft supersymmetry-breaking interactions. We follow the approach initiated by Iba{tilde n}ez and Luest and developed by Brignole, Iba{tilde n}ez, and Mu{tilde n}oz. This is based on a locally supersymmetric {sigma}-model action of moduli and matter fields obeying the stringy duality symmetries. It is assumed that the low energy fields of the minimal supersymmetric standard model are in one-to-one correpondence with string massless modes and that supersymmetry breaking takes place simultaneously with the lifting of flat directions for dilaton and compactification moduli fields. Themore » breaking of supersymmetry is represented in terms of dilaton and moduli auxiliary field components and, consistently with a vanishing cosmological constant, is parametrized in terms of the dilaton-moduli mixing angle {theta} and the gravitino mass scale {ital m}{sub {ital g}}. The soft supersymmetry-breaking interactions (gaugino masses, squark and slepton mass matrices, scalar interaction {ital A} and {ital B} coupling constants) are calculable as a function of these parameters and of the discrete set of molular weight parameters specifying the modular transformation properites of the low energy fields. To establish the flavor-changing neutral current constraints we solve the renormalization group one-loop equations for the full set of gauge, Yukawa, and supersymmetry-breaking coupling constants. A simplified version is used in which one treats the contributions from the third generation quark and lepton Yukawa couplings exactly, while retaining for the first and second generation couplings only the leading order term in the large logarithm variable. (Abstract Truncated)« less
  • We consider a class of seven-dimensional N=1 supersymmetric orbifold GUTs in which the standard model (SM) gauge couplings and one of the Yukawa couplings (top quark, bottom quark or tau lepton) are unified, without low-energy supersymmetry, at M{sub GUT}{approx_equal}4x10{sup 16} GeV. With gauge-top quark Yukawa coupling unification the SM Higgs boson mass is estimated to be 135{+-}6 GeV, which increases to 144{+-}4 GeV for gauge-bottom quark (or gauge-tau lepton) Yukawa coupling unification.
  • We systematically study the possibility for realizing realistic values of lepton mass ratios and mixing angles by using only renormalizable Yukawa couplings derived from the heterotic Z{sub 6}-I orbifold. We assume one pair of up and down sector Higgs fields. We consider both the Dirac neutrino mass scenario and the seesaw scenario with degenerate right-handed majorana neutrino masses. It is found that realistic values of the charged lepton mass ratios, m{sub e}/m{sub {tau}} and m{sub {mu}}/m{sub {tau}}, the neutrino mass squared difference ratio, {delta}m{sub 31}{sup 2}/{delta}m{sub 21}{sup 2}, and the lepton mixing angles can be obtained in certain cases.
  • We search for a possibility of getting realistic fermion mass ratios and mixing angles from renormalizable couplings on the Z6-I heterotic orbifold with one pair of Higgs doublets. In the quark sector, we find cases with reasonable results if we ignore the first family. In the lepton sector, we can fit the charged lepton mass ratios, the neutrino mass squared difference ratio, and the lepton mixing angles, considering all three families00.