Higgs Boson with a Few Fb

The existence of a 4 SM family would produce a large enhancement of the gluon fusion channel of Higgs boson production at hadron colliders. In this case, the SM Higgs boson could be seen at the CERN Large Hadron Collider (LHC) via the golden mode (H0 → 4l) with an integral luminosity of only a few fb−1. One of the primary goals at the LHC is to observe the Standard Model (SM) Higgs particle (H). The LEP data already set a lower bound on the Higgs boson mass at 114.1 GeV [1]. Proton-proton collisions at a center of mass energy of 14 TeV at the LHC will produce H, mainly through gluon-gluon fusion [2], with a mass up to 1 TeV. The main contribution to the production of the Higgs boson in the three SM family case, comes from the well known triangular diagram with a t-quark loop. If the 4 SM family [3,4] exists, we have two additional diagrams where the t-quark is replaced by u4 and d4 quarks.