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Phys. Rev. D 80, 073015 (2009) [22 pages]Testability of the type I seesaw mechanism at the CERN LHC: Revealing the existence of the B-L symmetry
Received 1 August 2009; published 29 October 2009
We study the possibility to test the type I seesaw mechanism for neutrino masses at the CERN Large Hadron Collider. The inclusion of three generations of right-handed neutrinos (Ni) provides an attractive option of gauging the B-L accidental symmetry in the standard model (as well as an extended symmetry X=Y-5(B-L)/4). The production mechanisms for the right-handed neutrinos through the Z[prime] gauge boson in the U(1)B-L and U(1)X extensions of the standard model are studied. We discuss the flavor combinations of the charged leptons from the decays of Ni in the DeltaL=2 channels. We find that the clean channels with dilepton plus jets and possible secondary vertices of the N decay could provide conclusive signals at the LHC in connection with the hierarchical pattern of the light neutrino masses and mixing properties within the type I seesaw mechanism. ©2009 The American Physical Society
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