Results are presented from a search for heavy, right-handed muon neutrinos, N_μ, and right-handed W_R bosons, which arise in the left-right symmetric extensions of the standard model. The analysis is based on a 5.0 fb−1 sample of proton-proton collisions at a center-of-mass energy of 7 TeV, collected by the CMS detector at the Large Hadron Collider. No evidence is observed for an excess of events over the standard model expectation. For models with exact left-right symmetry, heavy right-handed neutrinos are excluded at 95% confidence level for a range of neutrino masses below the W_R mass, dependent on the value of M_WR. The excluded region in the two-dimensional (M_WR, M_Nμ) mass plane extends to M_WR=2.5 TeV.
Search for Heavy Neutrinos and W_{R} Bosons with Right-Handed Couplings in a Left-Right Symmetric Model in pp Collisions at sqrt[s]=7 TeV
V. Sola;AMAPANE, Nicola Carlo;ARGIRO', Stefano;CASASSO, STEFANO;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PELLICCIONI, Mario;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;BELLAN, Riccardo;COVARELLI, Roberto;
2012-01-01
Abstract
Results are presented from a search for heavy, right-handed muon neutrinos, N_μ, and right-handed W_R bosons, which arise in the left-right symmetric extensions of the standard model. The analysis is based on a 5.0 fb−1 sample of proton-proton collisions at a center-of-mass energy of 7 TeV, collected by the CMS detector at the Large Hadron Collider. No evidence is observed for an excess of events over the standard model expectation. For models with exact left-right symmetry, heavy right-handed neutrinos are excluded at 95% confidence level for a range of neutrino masses below the W_R mass, dependent on the value of M_WR. The excluded region in the two-dimensional (M_WR, M_Nμ) mass plane extends to M_WR=2.5 TeV.File | Dimensione | Formato | |
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PhysRevLett.109.261802.pdf
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