排序方式: 共有19条查询结果,搜索用时 15 毫秒
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W.?KilianEmail author T.?Plehn P.?Richardson E.?Schmidt 《The European Physical Journal C - Particles and Fields》2005,39(2):229-243
We consider the collider phenomenology of split-supersymmetry models. Despite the challenging nature of the signals in these models the long-lived gluino can be discovered with masses above 2 TeV at the LHC. At a future linear collider we will be able to observe the renormalization group effects from split supersymmetry, using measurements of the neutralino and chargino masses and cross sections.Received: 15 August 2004, Revised: 29 September 2004, Published online: 11 January 2005 相似文献
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W. Beenakker R. Höpker T. Plehn P. M. Zerwas 《Zeitschrift fur Physik C Particles and Fields》1997,75(2):349-356
The partial widths are determined for stop decays to top quarks and gluinos, and gluino decays to stop particles and top quarks (depending on the masses of the particles involved). The widths are calculated including one-loop SUSY-QCD corrections. The radiative corrections for these strong-interaction decays are compared with the SUSY-QCD corrections for electroweak stop decays to quarks and neutralinos/charginos and top-quark decays to stops and neutralinos. 相似文献
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T. Plehn H. Spiesberger M. Spira P. M. Zerwas 《Zeitschrift fur Physik C Particles and Fields》1997,74(4):611-614
The cross sections for the formation of scalar resonances, leptoquarks or squarks, in electron/positron-proton collisions at HERA are presented, including next-to-leading order QCD corrections. Depending mildly on the mass of the resonances, the K-factors increase the production cross sections by up to 30% if the target quarks are valence quarks. The QCD corrections to the partial decay widths of leptoquarks/ squarks to leptons and quarks are small. The electron spectrum in the decays is nevertheless softened by perturbative gluon radiation at a level of 2 GeV for a leptoquark/ squark mass of 200 GeV. 相似文献
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Weydert C. Frixione S. Herquet M. Klasen M. Laenen E. Plehn T. Stavenga G. White C. D. 《The European Physical Journal C - Particles and Fields》2010,67(3-4):617-636
The European Physical Journal C - We discuss the calculation of charged Higgs boson production in association with a top quark in the MC@NLO framework for combining NLO matrix elements with a... 相似文献
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Sebastian Bock Remi Lafaye Tilman Plehn Michael Rauch Dirk Zerwas Peter M. Zerwas 《Physics letters. [Part B]》2010
Higgs couplings can be affected by physics beyond the Standard Model. We study modifications through interactions with a hidden sector and in specific composite Higgs models accessible at the LHC. Both scenarios give rise to congruent patterns of universal, or partially universal, shifts. In addition, Higgs decays to the hidden sector may lead to invisible decay modes which we also exploit. Experimental bounds on such potential modifications will measure the concordance of an observed Higgs boson with the Standard Model. 相似文献
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R. Lafaye T. Plehn M. Rauch D. Zerwas 《The European Physical Journal C - Particles and Fields》2008,54(4):617-644
If new physics is found at the LHC (and the ILC) the reconstruction of the underlying theory should not be biased by assumptions
about high-scale models. For the mapping of many measurements onto high-dimensional parameter spaces we introduce SFitter
with its new weighted Markov chain technique. SFitter constructs an exclusive likelihood map, determines the best-fitting
parameter point and produces a ranked list of the most likely parameter points. Using the example of the TeV-scale supersymmetric
Lagrangian we show how a high-dimensional likelihood map will generally include degeneracies and strong correlations. SFitter
allows us to study such model-parameter spaces employing Bayesian as well as frequentist constructions. We illustrate in detail
how it should be possible to analyze high-dimensional new-physics parameter spaces like the TeV-scale MSSM at the LHC. A combination
of LHC and ILC measurements might well be able to completely cover highly complex TeV-scale parameter spaces. 相似文献
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Claire Adam Jean-Loic Kneur Rémi Lafaye Tilman Plehn Michael Rauch Dirk Zerwas 《The European Physical Journal C - Particles and Fields》2011,71(1):1-19
If supersymmetry is observed at the LHC its model parameters can be measured at the electroweak scale. We discuss the expected precision on the parameter determination, including a proper treatment of experimental and theoretical errors. Particular attention is paid to degenerate solutions. Using the SFitter framework we perform a bottom–up reconstruction of the unified parameters at the high scale, including a full error propagation. 相似文献