July 25, 2007 to August 1, 2007
Karlsruhe University
Europe/Zurich timezone

Associated charged Higgs and W boson production in the MSSM at the CERN Large Hadron Collider

Jul 26, 2007, 5:30 PM
20m
Small Auditorium A (Karlsruhe University)

Small Auditorium A

Karlsruhe University

Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
Parallel Talk Colliders - Higgs Phenomenology Colliders - Higgs Phenomenology 2 (Theory)

Speaker

Dr Stefan Hesselbach (University of Southampton)

Description

We investigate the viability of observing charged Higgs bosons (H^+) produced in association with W bosons at the CERN Large Hadron Collider, using the leptonic decay H^+ -> tau^+ nu_tau and hadronic W-decay, within different scenarios of the Minimal Supersymmetric Standard Model (MSSM) with both real and complex parameters. Performing a parton level study we show how the irreducible Standard Model background from W + 2 jets can be controlled by applying appropriate cuts and find that the size of a possible signal depends on the cuts needed to suppress QCD backgrounds and misidentifications. In the standard maximal mixing scenario of the MSSM we find a viable signal for large tan beta and intermediate H^+ masses (~ m_t) when using optimistic cuts whereas for more pessimistic ones we only find a viable signal for very large tan beta (> 50). We have also investigated a special class of MSSM scenarios with large mass-splittings among the heavy Higgs bosons where the cross-section can be resonantly enhanced by factors up to one hundred, with a strong dependence on the CP-violating phases. Even so we find that the signal after cuts remains small except for small masses (<= m_t) with optimistic cuts. Finally, in all the scenarios we have investigated we have only found small CP-asymmetries.

Primary authors

Mr David Eriksson (Uppsala University) Dr Johan Rathsman (Uppsala University) Dr Stefan Hesselbach (University of Southampton)

Presentation materials