Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-02-26
JHEP 1204 (2012) 019
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 15 figures; published version
Scientific paper
Motivated by the discovery hint of the Standard Model (SM) Higgs mass around 125 GeV at the LHC, we study the vacuum stability and perturbativity bounds on Higgs scalar of the SM extensions including neutrinos and dark matter (DM). Guided by the SM gauge symmetry and the minimal changes in the SM Higgs potential we consider two extensions of neutrino sector (Type-I and Type-III seesaw mechanisms) and DM sector (a real scalar singlet (darkon) and minimal dark matter (MDM)) respectively. The darkon contributes positively to the $\beta$ function of the Higgs quartic coupling $\lambda$ and can stabilize the SM vacuum up to high scale. Similar to the top quark in the SM we find the cause of instability is sensitive to the size of new Yukawa couplings between heavy neutrinos and Higgs boson, namely, the scale of seesaw mechanism. MDM and Type-III seesaw fermion triplet, two nontrivial representations of $SU(2)_{L}$ group, will bring the additional positive contributions to the gauge coupling $g_{2}$ renormalization group (RG) evolution and would also help to stabilize the electroweak vacuum up to high scale.
Chen Chian-Shu
Tang Yong
No associations
LandOfFree
Vacuum stability, neutrinos, and dark matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Vacuum stability, neutrinos, and dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum stability, neutrinos, and dark matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-215651