IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Search for a heavy particle decaying into an electron and a muon with the ATLAS detector in s√=7 TeV pp collisions at the LHC.
Autor/es:
THE ATLAS COLL. , G. AAD; MARIA TERESA DOVA ET AL.
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2011 vol. 106 p. 251801 - 251805
ISSN:
0031-9007
Resumen:
This Letter presents the first search for a heavy particle decaying into an emu final state in sqrt(s)=7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35/pb. No excess above the Standard Model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming single coupling dominance and the couplings lambda´_{311}=0.11, lambda_{312}=0.07. In a lepton flavor violating model, a Z´-like vector boson with masses of 0.70 to 1.00 TeV and corresponding cross sections times branching ratios of 0.175 to 0.183 pb is excluded. These results extend to higher mass RPV sneutrinos and LFV Z´s than previous constraints from the Tevatron.