INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for tb resonances in proton-proton collisions at √s = 7 TeV with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 213 p. 1 - 23
ISSN:
0031-9007
Resumen:
This Letter presents a search for tb resonances in 1.04/fb of LHC
proton-proton collision data collected by the ATLAS detector at a
center-of-mass energy of 7 TeV. Events with a lepton, missing transverse
momentum, and two jets are selected and the invariant mass of the
corresponding final state is reconstructed. The search exploits the
shape of the tb invariant mass distribution compared to the expected
Standard Model backgrounds. The model of a right-handed W'_R with
Standard Model-like couplings is chosen as the benchmark model for this
search. No statistically significant excess of events is observed in
data, and upper limits on the cross section times the branching ratio of
W'_R resonances at 95% CL lie in the range 6.1-1.0 pb for W'_R masses
ranging from 0.5 to 2.0 TeV. These limits are translated into a lower
bound on the allowed right-handed W'_R mass, giving m_{W'_R} > 1.13
TeV at 95% CL.