INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for heavy vector-like quarks coupling to light generations in proton-proton collisions at √s = 7 TeV with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 213 p. 1 - 23
ISSN:
0370-2693
Resumen:
This letter presents a search for singly produced vector-like quarks, Q,
coupling to light quarks, q. The search is sensitive to both charged
current (CC) and neutral current (NC) processes, p p --> Q q --> W
q q' and p p --> Q q --> Z q q' with a leptonic decay of the
vector gauge boson. In 1.04/fb of data taken in 2011 by the ATLAS
experiment at a center-of-mass energy sqrt(s) = 7 TeV, no evidence of
such heavy vector-like quarks is observed above the expected Standard
Model background. Limits on the heavy vector-like quark production cross
section times branching ratio as a function of mass m_Q are obtained.
For a coupling kappa_(qQ) = v/m_Q, where v is the Higgs vacuum
expectation value, 95% C.L. lower limits on the mass of a vector-like
quark are set at 900 GeV and 760 GeV from CC and NC processes,
respectively.