381 research outputs found
Towards testing a two-Higgs-doublet model with maximal CP symmetry at the LHC: Monte Carlo event generator implementation
No full textBrehmer J, Lendermann V, Maniatis M, Nachtmann O, Schultz-Coulon H-C, Stamen R. Towards testing a two-Higgs-doublet model with maximal CP symmetry at the LHC: Monte Carlo event generator implementation. European Physical Journal C. 2013;73(4): 2380.A Monte Carlo event generator is implemented for a two-Higgs-doublet model with maximal CP symmetry, the MCPM. The model contains five physical Higgs bosons; the rho', behaving similarly to the standard-model Higgs boson, two extra neutral bosons h' and h '', and a charged pair H-+/-. The special feature of the MCPM is that, concerning the Yukawa couplings, the bosons h', h '' and H-+/- couple directly only to the second-generation fermions but with strengths given by the third-generation-fermion masses. Our event generator allows the simulation of the Drell-Yan-type production processes of h', h '' and H-+/- in proton-proton collisions at LHC energies. Also the subsequent leptonic decays of these bosons into the mu(+)mu(-), mu(+)nu(mu) and mu(-)(nu) over bar (mu) channels are studied as well as the dominant background processes. We estimate the integrated luminosities needed in pp collisions at center-of-mass energies of 8 and 14 TeV for significant observations of the Higgs bosons h', h '' and H-+/- in these muonic channels
Panel on future challenges in modeling methodology
No full textThis panel paper presents the views of six researchers and practitioners of simulation modeling. Collectively we attempt to address a range of key future challenges to modeling methodology. It is hoped that the views of this paper, and the presentations made by the panelists at the 2004 Winter Simulation Conference will raise awareness and stimulate further discussion on the future of modeling methodology in areas such as modeling problems in business applications, human factors and geographically dispersed networks; rapid model development and maintenance; legacy modeling approaches; markup languages; virtual interactive process design and simulation; standards; and Grid computing
Measurement of the proton structure function
No full textQED Compton scattering at HERA is proposed for a measurement of the proton structure function F
2 at low momentum transfers Q
2. It is shown that the analysis of inelastic QED Compton events allows the extension of present HERA structure function measurements to a kinematic domain, which up to now was only accessed in fixed target data. Preliminary results of such a measurement performed by the H1 Collaboration are presented. The results are in good agreement with the measurements from fixed target experiments wherever they overlap
Probing TeV Gravity with ATLAS Detector
No full textModels with compactified extra space dimensions offer a new way to address outstanding problems in and beyond the Standard Model. In these models, the strength of gravity is strongly increased at small distances, which opens up the possibility of observing quantum gravity effects in the TeV energy range reachable by the LHC. One of the most spectacular phenomena would be the production of microscopic black holes. Searches for mini black holes are foreseen in the ATLAS experiment with the start-up of data taking in 2009. We present feasibility studies for the triggering and reconstruction of the black hole event topologies, determination of the Standard Model backgrounds, and the black hole discovery potential
Probing TeV Gravity with the ATLAS Detector
No full textModels with compactified extra space dimensions offer a new way to address outstanding problems in and beyond the Standard Model. In these models, the strength of gravity is strongly increased at small distances, which opens up the possibility of observing quantum gravity effects in the TeV energy range reachable by the LHC. One of the most spectacular phenomena would be the production of microscopic black holes. Searches for black holes are foreseen in the ATLAS experiment with the start-up of data taking in 2009. We present feasibility studies for the triggering, selection and reconstruction of the black hole event topologies, the black hole discovery potential and their identification
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