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Title: Sparticle spectroscopy of the minimal SO(10) model

Here, the supersymmetric (SUSY) minimal SO(10) model is a well-motivated grand unified theory, where the Standard Model (SM) fermions have Yukawa couplings with only one 10-plet and one $$\overline{126}$$-plet Higgs fields and it is highly non-trivial if the realistic quark and lepton mass matrices can be reproduced in this context. It has been known that the best fit for all the SM fermion mass matrices is achieved by a vacuum expectation value of the $$\overline{126}$$-plet Higgs field being at the intermediate scale of around O(10 13) GeV. Under the presence of the SO(10) symmetry breaking at the intermediate scale, the successful SM gauge coupling unification is at risk and likely to be spoiled. Recently, it has been shown that the low-energy fermion mass matrices, except for the down-quark mass predicted to be too low, are very well-fitted without the intermediate scale. In order to resolve the too-low down quark mass while keeping the other fittings intact, we consider SUSY threshold corrections to reproduce the right down quark mass. It turns out that this requires flavor-dependent soft parameters. Motivated by this fact, we calculate particle mass spectra at low energies with flavor-dependent sfermion masses at the grand unification scale. We present a benchmark particle mass spectrum which satisfies a variety of phenomenological constraints, in particular, the observed SM-like Higgs boson mass of around 125 GeV and the relic abundance of the neutralino dark matter as well as the experimental result of the muon anomalous magnetic moment. In the resultant mass spectrum, sleptons in the first and second generations, bino and winos are all light, and this scenario can be tested at the LHC Run-2 in the near future.
 [1] ;  [2] ;  [3]
  1. Osaka Univ., Osaka (Japan). Research Center for Nuclear Physics (RCNP)
  2. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
  3. Hanoi Univ. of Science and Technology, Hanoi (Vietnam)
Publication Date:
Grant/Contract Number:
SC0013680; 103.01-2014.22
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 767; Journal Issue: C; Journal ID: ISSN 0370-2693
Research Org:
Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
Sponsoring Org:
Vietnam Education Foundation; Japan Ministry of Education, Science and Culture; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1355927; OSTI ID: 1365635