Research Areas 




Outline 

Professor Demina's research interests are in the field of Experimental High Energy Physics. She is collaborating on the D-Zero Experiment at Fermilab, where her interests are concerned with understanding the mechanism of elecro-weak symmetry breaking and the study of top quark properties. The identification of heavy flavor jets, such as b and c-jets, is vitally important for these studies, and Professor Demina is working on the development of heavy flavor tagging algorithms that employ lifetime information obtained using silicon microstrip detectors. She co-leads the effort in the design and production of radiation hard high precision silicon sensors for use in the D-Zero Run2b upgrade.

Professor Demina is also collaborating on the CMS experiment at the Large Hadron Collider (LHC) at CERN, where she is the deputy project leader of the silicon outer barrel construction project. Her interests at the hadron-hadron collider include the search for exotic particles such as the Higgs boson and supersymmetric particles such as the the scalar top and bottom quarks, studies of the top quark, and development and construction of silicon tracking detectors.


Silicon 

o Picture of CMS Tracker
o Si Sensor QA at UofR
o Test Beam (links to publications)


Top Quark 

o Top cross section

S.Khanov: Measurement of the tt Production Cross Section in pp Collisions at √s = 1.96 TeV using Lepton+Jets Events with Lifetime b-Tagging
Published 9/15/05: Phys. Lett. B 626, 35 (2005)

M.-A. Pleier: Measurement of the tt Production Cross Section in pp Collisions at √s = 1.96 TeV using Kinematic Characteristics of Lepton+Jets Events
Published 9/15/05: Phys. Lett. B 626, 45 (2005)

o Top mass
C. Garcia: Measurement of the Top Quark Mass in the Lepton+Jets Final State with the Matrix Element Method
Published 11/27/06: Phys. Rev. D 74, 092005 (2006)


Top Asymmetry 

Amnon Harel, Douglas Orbaker for D0:

1. Measurement of the Forward-Backward Charge Asymmetry in Top-Quark Pair Production
Published 4/9/08: Phys. Rev. Lett.100, 142002 (2008)

2. Forward-Backward Asymmetry in Top Quark-Antiquark Production
Published 12/12/11: Phys. Rev. D 84, 112005 (2011)

3. Measurement of Leptonic Asymmetries and Top Quark Polarization in tt Production
Published 01/24/13: Phys. Rev. D 87, 011103(R) (2013)


Burt Betchart for CMS:


o Plots
o link to RocFIT (top-pair reconstruction algorithms)

SUSY 

Supersymmetry


Su Jung Park @D0, Supersymmetric partner of Top in Top
Search for Admixture of Scalar Top Quarks in the tt Lepton+Jets Final State at √s = 1.96 TeV

o CDF, Supersymmetric partner of Top Quark, public
o CMS result (Hening, Burt)


HIGGS BOSON 

o ZZ (Roberto) spin, couplings