DPF 2009

Session

Beyond the Standard Model I

27 Jul 2009, 14:00

Wayne State University

447. Searches for BSM signatures at the Tevatron

Andrew Haas (SLAC)

27/07/2009, 14:00

Beyond the Standard Model

Large datasets from the D0 and CDF experiments at the Fermilab Tevatron have been used to search for evidence of beyond-SM physics. Direct searches for new particles and interactions resulting from specific models such as SUSY and Large Extra Dimensions will be discussed, as well as "model independent" searches.

312. Search for Supersymmetry in ppbar Collisions at root(s)=1.96 TeV Using the Trilepton Signature of Chargino-Neutralino Production

Mr Rob Forrest (UC Davis)

27/07/2009, 14:40

Beyond the Standard Model

The production of chargino-neutralino pairs and their subsequent leptonic decays is one of the most promising supersymmetry (SUSY) signatures at the Tevatron proton-antiproton collider. We present here the most recent results on the search for the three-lepton and missing-transverse-energy SUSY signature using data collected with the CDF II detector. The results are interpreted within the...

142. Addressing the “Inverse Problem” of Multichannel Particle Searches: A Model-independent Approach to Supersymmetry Search with Trileptons

Mr Alexander Sood (Rutgers, The State University of New Jersey)

27/07/2009, 15:00

Beyond the Standard Model

Using supersymmetry search with trileptons as an example, we address the problem of discerning new physics when it manifests itself in multiple channels simultaneously with several models vying to accommodate the findings. This is best achieved by presenting experimental results in a model- independent fashion, but suitably parametrized to allow for their interpretation in most models....

141. Setting Limits on Gauge Mediated Supersymmetry Breaking Models with Photons at CDF

Mr Eunsin Lee (Texas A&M University)

27/07/2009, 15:20

Beyond the Standard Model

Models of supersymmetry predict new heavy, neutral particles, known as a neutralino, that can decay to a photon and the lightest supersymmetric particle, the gravitino. We present a search for these particles in proton anti-proton collisions at sqrt{s}=1.96 TeV at the Collider Detector at Fermilab. After years of data taking we find no evidence for this process and set the...

278. Discovery potential for GMSB Supersymmetry in ATLAS using the Zphoton+MET and ZZ+MET Final States

Devin Harper (University of Michigan)

27/07/2009, 15:40

Beyond the Standard Model

We have studied the sensitivity of the ATLAS detector for supersymmetric neutralino signals in the Zphoton + transverce missing energy (MET) and ZZ + MET final states in the Gauge Mediation Supersymmetry Breaking (GMSB) model in which the Higgsino-like neutralino is the next-to-lightest supersymmetric particle (NLSP). The neutralino could be pair produced either directly or indirectly and...

451. Recent developments in the phenomenology of supersymmetric models

Prof. Stephen Martin (Northern Illinois University)

27/07/2009, 16:30

Beyond the Standard Model

I will review some of the recent developments in phenomenological aspects of supersymmetric model building. The discussion will be organized around issues and models that are motivated by the supersymmetric little hierarchy problem and by constraints on and searches for dark matter.

190. Search for Charginos and Neutralinos with the D0 detector; Search for dark photons from supersymmetric hidden valleys with the D0 Detector

Todd Adams (Department of Physics, B-159 - Florida State University)

27/07/2009, 17:10

Beyond the Standard Model

Supersymmetry predicts the existence of charginos and neutralinos, the partners of the gauge and Higgs bosons, which can be produced in pairs at the Tevatron. Charginos and neutralinos decay directly or in cascades into charged leptons and the lightest supersymmetric particle (LSP). Assuming R parity conservation the LSP (in this case the lightest neutralino) is stable. Due to the small...

192. Searches for Squarks and Gluinos with the D0 Detector

Sergey Uzunyan (Northern llinois University)

27/07/2009, 17:30

Beyond the Standard Model

A search for squarks and gluinos has been performed on data from ppbar collisions collected using the D0 detector at the Fermilab Tevatron. The topology analyzed consists of jets with large missing transverse energy. The search for squarks has also been performed in the topology of multijet events accompanied by large missing transverse energy and at least one tau lepton decaying...

54. R-symmetric Gauge Mediation and the MRSSM

Dr Andrew Blechman (University of Toronto)

27/07/2009, 17:50

Beyond the Standard Model

We present a version of Gauge Mediated Supersymmetry Breaking which preserves an R-symmetry - the gauginos are Dirac particles, the A-terms are zero, and there are four Higgs doublets. This offers an alternative way for gauginos to acquire mass in the supersymmetry-breaking models of Intriligator, Seiberg, and Shih. We investigate the possibility of using R-symmetric gauge mediation to realize...