We propose a search for New Physics signals in two lepton final states
with the Compact Muon Solenoid operating at the CERN Large Hadron
Collider. As compared to other signatures, dileptons are promising 
 for the discovery of New Physics due to the easy trigger, low
 background rates, well-known cross sections for Standard Model
 processes, large couplings to new particles in several Standard Model
 extensions. In the past several particles produced in hadron
 collisions were discovered in their dilepton final states, as the
 J/Psi, the Upsilon, and the Z. The LHC might confirm this tradition.

Besides exibiting new resonant states, New Physics could be revealed in more
complicated topologies with two leptons and several jets. To reject
Standard Model processes, background to this searches, the detailed
features of these events must be investigated, analyzing the charge
correlation of the two leptons, their invariant mass, jet and b-jet
multiplicities, missing energy in the plane transverse to the beam
direction, etc. We will discuss in detail the case of heavy fermionic
partners of the top quark. Preliminary studies show that in this case
an early discovery using the first hundreds of inverse picobarn
delivered by LHC could take place. 

The succesfull candidate must possess a robust curriculum in Highh
Energy Physics or in Nuclear Physics. Experience in data analysis is
required, with knowledge of c++ programming. We do not require
previous experience in hadron collider Physics.


[1] see for instance : T.Bose, R.Contino, M.Narain e G.Servant 
"A search for Top partners at the LHC using same-sign  dileptons final
states"
in "New Physics at the LHC : a Les Houches Report",
arXiv:0902.3715v1, 25/02/2008