INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s = 7 TeV proton-proton collisions
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 720 p. 1 - 23
ISSN:
0370-2693
Resumen:
The results of a search for pair production of light top squarks are
presented, using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collisions
collected with the ATLAS detector at the Large Hadron Collider. This
search targets top squarks with masses similar to, or lighter than, the
top quark mass. Final states containing exclusively one or two leptons
(e, mu), large missing transverse momentum, light-jets and b-jets are
used to reconstruct the top squark pair system. Global mass scale
variables are used to separate the signal from a large ttbar background.
No excess over the Standard Model expectations is found. The results
are interpreted in the framework of the Minimal Supersymmetric Standard
Model, assuming the top squark decays exclusively to a chargino and a
b-quark. Light top squarks with masses between 123-167 GeV are excluded
for neutralino masses around 55 GeV.