Speaker
Prof.
Amitava Datta
(IISER-Kolkata, India)
Description
In some extensions of the standard model with extended Higgs sectors,
events from new particle production may pass the selection criteria for
Higgs search in different channels at the LHC-14 TeV and mimic Higgs signals.
This intriguing possibility is illustrated by Pythia based simulations
using several representative points in the parameter space of the minimal
supersymmetric standard model (MSSM) including a point in the minimal
supergravity model consistent with the darkmatter relic density data.
Our simulations explore the interplay between the charged Higgs signal
and typical squark-gluino events. We argue that the standard selections like the one
based on the polarization properties of the $\tau$'s from charged Higgs
decay, though adequate for handling the SM background, may not be very
efficient in the presence of SUSY backgrounds. We then
propose an alternative search strategy based on kinematics only
which sufficiently controls both the SM and the MSSM backgrounds. For charged Higgs masses
in the deep deccoupling regime ($600 GeV \lsim m_H \lsim 800 GeV$)this
method works well and extends the LHC reach close to 8OO GeV for an
integrated luminosity of $30 fb ^{-1}$ with or without the SUSY background. For a
lighter charged Higgs a judicious combination of the old selections and
some of the cuts proposed by us may disentangle the Higgs signal from
the squark-gluino backgrounds quite effectively.
Primary author
Prof.
Amitava Datta
(IISER-Kolkata, India)
Co-authors
Dr
Manas Maity
(Visva-Bharati University, Santiniketan, India)
Dr
Manoranjan Guchait
(Tata Institue of Fundamental Research, Mumbai, India)
Ms
Nabanita Bhattacharyya
(IISER-Kolkata, India)
Mr
Sujoy Poddar
(Netaji Nagar Day College, Kolkata, India)
