44 research outputs found
Designing Universal Logic Module FPGA Architectures for Use With Ambipolar Transistor Technology
Recent publications show a rise of ambipolar transistor technology research and associated implementations of multi-function logic cells in these technologies. Special properties of these technologies enable implementations of Universal Logic Modules (ULMs) using few transistors, which draws renewed interest to use such ULMs as basic logic blocks for FPGA architectures. Unlike N-input Lookup Tables (LUTs), most ULMs only implement a fixed subset of the possible Boolean functions. In this work, we first adapt the Verilog-to-Routing (VTR) 8.0 toolflow to target such reduced-function ULM primitives. We then modify VTR\u27s flagship 40nm architecture to use an ULM primitive instead of LUTs, modeling the double-gate carbon nanotube FET 8-function logic gate CNT-DR8F published by Liu et al. Using VTR\u27s extensive benchmark framework, we analyze effects caused by the limited set of function offered by these primitives. To counter some of the observed effects, we present various clustered architectures, where multiple ULM cells are combined in a logic block. We conclude with an analysis of various parameters which affect performance of the different implementations
The fate of the Littlest Higgs Model with T-parity under 13 TeV LHC Data
We exploit all LHC available Run 2 data at center-of-mass energies of 8 and
13 TeV for searches for physics beyond the Standard Model. We scrutinize the
allowed parameter space of Little Higgs models with the concrete symmetry of
T-parity by providing comprehensive analyses of all relevant production
channels of heavy vectors, top partners, heavy quarks and heavy leptons and all
phenomenologically relevant decay channels. Constraints on the model will be
derived from the signatures of jets and missing energy or leptons and missing
energy. Besides the symmetric case, we also study the case of T-parity
violation. Furthermore, we give an extrapolation to the LHC high-luminosity
phase at 14 TeV as well.Comment: 50 pages, 32 figure
NLO Cross Sections for the LHC using GOLEM: Status and Prospects
In this talk we review the GOLEM approach to one-loop calculations and
present an automated implementation of this technique. This method is based on
Feynman diagrams and an advanced reduction of one-loop tensor integrals which
avoids numerical instabilities. We have extended our one-loop integral library
golem95 with an automated one-loop matrix element generator to compute the
virtual corrections of the process . The
implementation of the virtual matrix element has been interfaced with
tree-level Monte Carlo programs to provide the full result for the above
process.Comment: 8 pages, 1 figure, contribution to the proceedings of the 9th
International Symposium on Radiative Corrections (RADCOR 2009), October 25-30
2009, Ascona, Switzerlan
Implications of the 750 GeV gamma-gamma Resonance as a Case Study for the International Linear Collider
If the gamma-gamma resonance at 750 GeV suggested by 2015 LHC data turns out
to be a real effect, what are the implications for the physics case and upgrade
path of the International Linear Collider? Whether or not the resonance is
confirmed, this question provides an interesting case study testing the
robustness of the ILC physics case. In this note, we address this question with
two points: (1) Almost all models proposed for the new 750 GeV particle require
additional new particles with electroweak couplings. The key elements of the
500 GeV ILC physics program---precision measurements of the Higgs boson, the
top quark, and 4-fermion interactions---will powerfully discriminate among
these models. This information will be important in conjunction with new LHC
data, or alone, if the new particles accompanying the 750 GeV resonance are
beyond the mass reach of the LHC. (2) Over a longer term, the energy upgrade of
the ILC to 1 TeV already discussed in the ILC TDR will enable experiments in
gamma-gamma and e+e- collisions to directly produce and study the 750 GeV
particle from these unique initial states.Comment: 39 pages, 5 figures, 5 tables; v2: some references adde