Standard model extended by a heavy singlet: Linear vs. nonlinear EFT
نویسندگان
چکیده
منابع مشابه
Lepton Flavor Violation in the Standard Model Extended by Heavy Singlet Dirac Neutrinos
Low energy neutrinoless lepton flavor violating (LFV) processes are studied in an extension of the Standard Model (SM) by heavy SU(2) × U(1) singlet Dirac neutrinos. An upper bound procedure is elaborated for the evaluation of amplitudes. A comment on the extraction of heavy neutrino mixings from astrophysical observations is given. For processes not treated in the applied model the formalism f...
متن کاملOne-loop Effective Lagrangian for a Standard Model with a Heavy Charged Scalar Singlet
We study several problems related to the construction and the use of effective Lagrangians by considering an extension of the standard model that includes a heavy scalar singlet coupled to the leptonic doublet. Starting from the full renormalizable model, we build an effective field theory by integrating out the heavy scalar. A local effective Lagrangian (up to operators of dimension six) is ob...
متن کاملCERN LHC phenomenology of an extended standard model with a real scalar singlet
Gauge singlet extensions of the standard model (SM) scalar sector may help remedy its theoretical and phenomenological shortcomings while solving outstanding problems in cosmology. Depending on the symmetries of the scalar potential, such extensions may provide a viable candidate for the observed relic density of cold dark matter or a strong first order electroweak phase transition needed for e...
متن کاملComplex singlet extension of the standard model
Vernon Barger, Paul Langacker, Mathew McCaskey, Michael Ramsey-Musolf, and Gabe Shaughnessy Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA School of Natural Sciences, Institute for Advanced Study, Einstein Drive, Princeton, New Jersey 08540, USA Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA Northwestern Universit...
متن کاملHeavy Higgs signal - background interference in gg → V V in the Standard Model plus real singlet
For the Standard Model extended with a real scalar singlet field, the modification of the heavy Higgs signal due to interference with the continuum background and the off-shell light Higgs contribution is studied for gg → ZZ,WW → 4 lepton processes at the Large Hadron Collider. Interference effects can range from O(10%) to O(1) effects for integrated cross sections. Despite a strong cancellatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2017
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2017.02.006