DPF 2009

Session

Beyond the Standard Model IV

31 Jul 2009, 14:00

Wayne State University

458. Physics Beyond the Standard Model at the Threshold

Prof. Markus Luty (UC Davis), Markus Luty (University of California Davis)

31/07/2009, 14:00

Beyond the Standard Model

The large hadron collider will begin physics operation late this year, and will provide a decisive test of more than 30 years of building models for physics beyond the standard model. This talk will critically review the case for physics beyond the standard model arising from present-day data, and ways of distinguishing them at the LHC. Emphasis will be placed on strong electroweak...

195. Search for Leptoquark Production with the D0 Detector

Sergey Uzunyan (Northern llinois University)

31/07/2009, 14:40

Beyond the Standard Model

We report on searches for the production of scalar and vector leptoquarks in ppbar collisions at the Tevatron collider, which are based on integrated luminosities of up to 2.5 fb-1 collected with the DO detector. Leptoquarks, which are predicted by several extensions of the Standard Model, are hypothetical particles carrying both lepton and quark flavors. At hadron colliders they can...

248. ATLAS sensitivity to leptoquarks and heavy Majorana neutrinos in final states with high-pt dileptons and jets with early LHC data

Mr Vikas Bansal (Department of Physics and Astronomy-University of Pittsburgh-Unk)

31/07/2009, 15:00

Beyond the Standard Model

Dilepton-jet final states are used to study physical phenomena not predicted by the standard model. ATLAS discovery potential to leptoquarks and Majorana neutrinos is presented with fully-simulated ATLAS detector at the Large Hadron Collider (LHC) at CERN. The study is motivated by the role of the leptoquark in the Grand Unification of fundamental forces and the see-saw mechanism that...

222. Searches for quark compositeness/heavy resonances in hadronic final states

Dmitri Smirnov (Notre Dame)

31/07/2009, 15:20

Beyond the Standard Model

We report on searches for a compositeness signature of quarks and leptons in the di-fermion (di-leptons and di-jets) channels using data collected by the D0 detector at the Fermilab Tevatron. We set model-dependent lower limits at the 95% condence level on the compositeness scale of for constructive and destructive interference between the Drell-Yan (DY) amplitude and the contact...

40. Lifetime Difference in $D^0$-${\overline D}^0$ Mixing within R-Parity Violating SUSY

Mr Gagik Yeghiyan (Wayne State University)

31/07/2009, 15:40

Beyond the Standard Model

We re-examine constraints from the evidence for observation of the lifetime difference in $D^0$-${\overline D}^0$ mixing on the parameters of supersymmetric models with $R$-parity violation (RPV). We find that RPV SUSY can give large negative contribution to the lifetime difference. We also discuss the importance of the choice of weak or mass basis when placing the constraints on...

444. Exotic Searches With Complex Final States

Prof. Tulika Bose (Boston University)

31/07/2009, 16:30

Beyond the Standard Model

A review of the discovery potential of the LHC for exotic phenomena involving complex final states is presented. Topics covered include searches for high mass di-boson resonances, fourth generation quarks, technicolor, black-holes etc. Challenges presented by unconventional final states involving long-lived particles predicted by hidden valley and other models are also discussed. The...

333. Could leptons, quarks or both be highly relativistic, bound states of a minimally interacting fermion and scalar?

Prof. G. Bruce Mainland (The Ohio State University at Newark)

31/07/2009, 17:10

Beyond the Standard Model

To begin exploring the possibility that leptons, quarks, or both, might be highly relativistic bound states, a numerical method for solving two-body, bound-state Bethe-Salpeter equations is discussed. This class of integral equations is difficult to solve, not because the equations are usually non-separable, but rather because it is typically impossible to discretize the equations in such...

12. Presymmetry beyond the Standard Model

Prof. Ernesto Matute (Universidad de Santiago de Chile)

31/07/2009, 17:30

Beyond the Standard Model

We go beyond the Standard Model guided by presymmetry, the discrete electroweak quark-lepton symmetry hidden by topological effects which explain quark fractional charges as in condense matter physics. Partners of the particles of the Standard Model and the discrete symmetry associated with this partnership appear as manifestations of a residual presymmetry and its extension from matter to...