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11 papers · 2 filters
Light Higgs bosons in phenomenological NMSSM
F. Mahmoudi, J. Rathsman, O. Stål +1
We consider scenarios in the next-to-minimal supersymmetric model (NMSSM) where the CP-odd and charged Higgs bosons are very light. As we demonstrate, these can be obtained as simp…
Vector Formfactors in Hard Pion Chiral Perturbation Theory
Johan Bijnens, Ilaria Jemos
We use three-flavour hard pion Chiral Perturbation Theory (HPChPT) in both the heavy meson and a relativistic formulation to calculate the chiral logarithms cont…
Interleaved Parton Showers and Tuning Prospects
Richard Corke, Torbjörn Sjöstrand
General-purpose Monte Carlo event generators have become important tools in particle physics, allowing the simulation of exclusive hadronic final states. In this article we examine…
Eccentricity and elliptic flow in proton-proton collisions from parton evolution
Emil Avsar, Christoffer Flensburg, Yoshitaka Hatta +2
It has been argued that high-multiplicity proton-proton collisions at the LHC may exhibit collective phenomena usually studied in the context of heavy-ion collisions, such as ellip…
The Massive O(N) Non-linear Sigma Model at High Orders
Johan Bijnens, Lisa Carloni
We extend our earlier work on the massive nonlinear sigma model to other observables. We derive expressions at leading order in the large expansion at all orders in the…
A Comparison of new MC-adapted Parton Densities
Tomas Kasemets, Torbjörn Sjöstrand
A selection of the latest and most frequently used parton distribution functions (PDFs) is incorporated in Pythia8, including the Monte Carlo-adapted PDFs from the MSTW and CTEQ co…