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Title: Impersonating the Standard Model Higgs boson: Alignment without decoupling

In models with an extended Higgs sector there exists an alignment limit, in which the lightest CP-even Higgs boson mimics the Standard Model Higgs. The alignment limit is commonly associated with the decoupling limit, where all non-standard scalars are significantly heavier than the Z boson. However, alignment can occur irrespective of the mass scale of the rest of the Higgs sector. In this work we discuss the general conditions that lead to “alignment without decoupling”, therefore allowing for the existence of additional non-standard Higgs bosons at the weak scale. The values of tan β for which this happens are derived in terms of the effective Higgs quartic couplings in general two-Higgs-doublet models as well as in supersymmetric theories, including the MSSM and the NMSSM. In addition, we study the information encoded in the variations of the SM Higgs-fermion couplings to explore regions in the mA – tan β parameter space.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  2. Univ. of California, Santa Barbara, CA (United States); Argonne National Lab., Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
  4. Univ. of Chicago, Chicago, IL (United States); Argonne National Lab., Argonne, IL (United States)
Publication Date:
OSTI Identifier:
1226268
Report Number(s):
FERMILAB-PUB--13-455-T; MCTP--13-31; ANL-HEP-PR--13-50; EFI--13-27
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1310.2248
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 4; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS supersymmetry phenomenology