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- Centre National de la Recherche ScientifiqueFR13 papers
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7 papers · 2 filters
Top pair invariant mass distribution: a window on new physics
R. Frederix, F. Maltoni
We explore in detail the physics potential of a measurement of the ttbar invariant mass distribution. First, we assess the accuracy of the best available predictions for this obser…
On the dynamical breaking of chiral symmetry: a new mechanism
Emidio Gabrielli
We consider a U(1) gauge theory, minimally coupled to a massless Dirac field, where a higher-derivative term is added to the pure gauge sector, as in the Lee-Wick models. We find t…
Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
J. Alwall, S. Hoeche, F. Krauss +11
We compare different procedures for combining fixed-order tree-level matrix-element generators with parton showers. We use the case of W-production at the Tevatron and the LHC to c…
GASTOF: Ultra-fast ToF forward detector for exclusive processes at the LHC
L. Bonnet, T. Pierzchala, K. Piotrzkowski +1
GASTOF (Gas Time-of-Flight) detector is a Cherenkov detector proposed for very precise (10--20 ps) arrival time measurements of forward protons at some 420 m from the central detec…
Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
P. Artoisenet, J. P. Lansberg, F. Maltoni
We calculate the cross sections for the direct hadroproduction of J/psi and Upsilon associated with a heavy-quark pair of the same flavour at leading order in alpha_S and v in NRQC…
A Twisted Custodial Symmetry in the Two-Higgs-Doublet Model
J. -M. Gerard, M. Herquet
In the Standard Model for electroweak interactions, the Higgs sector is known to display a "custodial" symmetry protecting the mass relation m_{W^\pm}^2=m_{W_3}^2 from large correc…