Journal
MODERN PHYSICS LETTERS A
Volume 28, Issue 11, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732313500326
Keywords
Standard Model Higgs; vacuum stability; TeV scale Majorana neutrino
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The vacuum stability condition of the Standard Model (SM) Higgs potential with mass in the range of 124-127 GeV puts an upper bound on the Dirac mass of the neutrinos. We study this constraint with the right-handed neutrino masses upto TeV scale. The heavy neutrinos contribute to Delta L = 2 processes like neutrinoless double beta decay and same-sign-dilepton (SSD) production in the colliders. The vacuum stability criterion also restricts the light-heavy neutrino mixing and constrains the branching ratio (BR) of lepton flavor-violating process, like mu -> e gamma mediated by the heavy neutrinos. We show that neutrinoless double beta decay with a lifetime similar to 10(25) years can be observed if the lightest heavy neutrino mass is <4.5 TeV. We show that the vacuum stability condition and the experimental bound on mu -> e gamma together put a constrain on heavy neutrino mass M-R > 3.3 TeV. Finally we show that the observation of SSDs associated with jets at the LHC needs much larger luminosity than available at present. We have estimated the possible maximum cross-section for this process at the LHC and show that with an integrated luminosity 100 fb(-1) it may be possible to observe the SSD signals as long as M-R < 400 GeV.
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