Conveners
Top II
- Brian Yencho
William Shepherd
(UC Santa Cruz)
07/05/2013, 16:45
Top Physics
parallel talk
I will present ongoing work which explores the applicability of wavelet methods to the tagging of boosted heavy objects. This technique does not depend on jet clustering algorithms and is thus complementary to existing tagging methods. I will focus on the ability to distinguish boosted hadronic W bosons and top quarks from QCD jets with comparable energy.
Dr
Sourav Mandal
(Kavli IPMU, University of Tokyo)
07/05/2013, 17:00
Top Physics
parallel talk
Top polarization is an important probe of new physics that couples to the top sector, and which may be discovered at the 14 TeV LHC. Taking the example of the MSSM, we argue that top polarization measurements can put a constraint on the soft supersymmetry breaking parameter At. In light of the recent discovery of an Standard Model-like Higgs boson of mass 125 GeV, a large At is a prediction of...
Mr
Hao Zhang
(Argonne National Laboratory and Illinois Institute of Technology)
07/05/2013, 17:15
Top Physics
parallel talk
The polarization of a top quark can be sensitive to new physics beyond the standard model. Since the charged lepton from top-quark decay is maximally correlated with the top-quark spin, it is common to measure the polarization from the distribution in the angle between the charged lepton and the top-quark directions. We propose a novel method based on the charged lepton energy fraction and...
Keith Lee
(PI)
07/05/2013, 17:30
Top Physics
parallel talk
The top quark may hold the key to new physics associated with the electroweak symmetry-breaking sector, given its large mass and enhanced coupling to the Higgs sector. We systematically categorize generic interactions of a new particle that couples to the top quark and a neutral particle, which is assumed to be heavy and stable, thus serving as a candidate for cold dark matter. The...
Daniel Duffty
(Illinois Institute of Technology)
07/05/2013, 17:45
Top Physics
parallel talk
We propose an alternate model-independent method to search for W' bosons at the Large Hadron Collider by looking at dijets where one jet is identified as a boosted top-jet. Performing a detector simulated signal and background study, we demonstrate that the reach in effective coupling g' is improved over existing analysis methods by a factor of 2 a W' mass of 1.8 TeV, and extend the reach in...
Michihisa Takeuchi
(Heidelberg)
07/05/2013, 18:00
Top Physics
parallel talk
Reconstructing hadronically decaying top quarks is a key challenge at the LHC, affecting a long list of Higgs analyses and new physics searches. We propose a new method of collecting jets in buckets, corresponding to top quarks and initial state radiation. This method is particularly well suited for moderate transverse momenta of the top quark, closing the gap between top taggers and...
Myeonghun Park
(University of Florida (US))
07/05/2013, 18:15
Recently, CMS measured top-quark mass very precisely in a dl-leptonic channel with the method which we invented for a new physics search at the LHC called one-dimensional decomposed MT2.
Di-leptonic ttbar channel has a common feature with SUSY type signatures
which have a missing transverse energy coming from a dark matter candidate.
The very important lesson that we've learned from CMS...
