Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Search for the associated production of W/Z and Higgs bosons in final states with b quark pairs in ppbar collisions at sqrt(s)=1.96 TeV

Jul 7, 2012, 2:30 PM
15m
Plenary 3 (Melbourne Convention and Exhibition Centre)

Plenary 3

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches Plenary 3 - The Standard Model - TR1

Speaker

Dr Satish Desai (Fermilab)

Description

We present searches for a low mass standard model Higgs boson produced in association with a W or a Z boson at a center of mass energy sqrt(s)=1.96 TeV with the D0 detector at the Fermilab Tevatron collider. The search is performed iin the full D0 Run2 data sample using the leptonic decay channels of the W and the Z boson (W--->lv, Z--->ll and Z--->vv) leading to signatures with one lepton and an imbalance in the transverse energy, or two leptons, or just a large imbalance in the transverse energy, in association with one or two b-tagged jets. We present a search for a low mass Standard Model Higgs boson produced in association with a Z boson decaying invisibly into a pair of neutrinos at a center-of-mass energy of sqrt(s)=1.96 TeV with the D0 detector at the Fermilab Tevatron collider. A significant signal contribution also arises from associated WH production with a leptonic W boson decay in which the charged lepton is not identified. The search is performed in events containing a large imbalance in the transverse energy, and one or two b-tagged jets and uses the full D0 Run 2 dataset. This channel is one of the most powerful ones in the search for a low mass Higgs boson at the Tevatron, but it is experimentally challenging due to the large QCD backgrounds and absence of visible leptons in the final state. We present a search for a low mass Standard Model Higgs boson produced in association with a Z boson decaying to charged leptons at a center-of-mass energy of sqrt(s)=1.96 TeV with the D0 detector at the Fermilab Tevatron collider. The search is performed in events containing two opposite-sign leptons (electron or muon) and one or two b-tagged jets and uses the full D0 Run 2 dataset. The reconstruction of a leptonic Z boson and the fully constrained kinematics provide powerful experimental handles to both suppress backgrounds and improve the dijet mass reconstruction, making this a very important channel in the search for a low mass Higgs boson at the Tevatron.

Primary author

Dr Satish Desai (Fermilab)

Presentation materials