121078454
Astrophysics at n_TOF Facility at CERN
The neutron time of flight (n_TOF) facility at CERN is a spallation neutron source with white neutron energy spectrum (from thermal to several GeV), covering the full energy range of interest for nuclear astrophysics, in particular for measurements of the neutron capture cross section required in s-process nucleosynthesis. This contribution presents an overview on the astrophysical program carried on at the n_TOF facility, the main results and their implications.
121849618
Electromagnetic properties of states in Cu-63 through the inelastic scattering of protons
28536320
pn to d and alpha pn to alpha d emission ratios in heavy-ion-induced reactions.
The competition between pn and d as well as between ..cap alpha..pn and ..cap alpha..d evaporation leading to the production of the same residual nuclei has been measured for nine and five heavy-ion-induced nuclear reactions, respectively, each at several bombarding energies. The deduced sigma/sub pn//sigma/sub d/ ratios have been found to be in very good agreement with the predictions of a previously extracted empirical equation. The ratios sigma/sub ..cap alpha..//sub pn//sigma/sub ..cap alpha..//sub d/ do not seem to depend on either the interacting system or the maximum excitation energy available to the residual nucleus.
122720966
Jets with small missing energy at CERN and fermilab in supersymmetry
The O(1) SUSY contribution, associated with small missing energy ETmiss, to the three-to-two jet cross-section ratio confirms the bounds set on the s-parton masses by the large-ETmiss Collider events. For mq > mgmg≳60–70 GeV is obtained. This method, using good-statistics data, will be useful at Tevatron energies.
119005178
Standard model processes
14317912
Polarizing the dipoles
We extend the massless dipole formalism of Catani and Seymour, as well as its massive version as developed by Catani, Dittmaier, Seymour and Trocsanyi, to arbitrary helicity eigenstates of the external partons. We modify the real radiation subtraction terms only, the primary aim being an improved efficiency of the numerical Monte Carlo integration of this contribution as part of a complete next-to-leading order calculation. In consequence, our extension is only applicable to unpolarized scattering. Upon summation over the helicities of the emitter pairs, our formulae trivially reduce to their original form. We implement our extension within the framework of \textsc{Helac-Phegas}, and give some examples of results pertinent to recent studies of backgrounds for the LHC. The code is publicly available. Since the integrated dipole contributions do not require any modifications, we do not discuss them, but they are implemented in the software.
120586857
The Gross-Neveu model near the critical temperature. A mechanism for quark-hadron phase transition in relativistic ion collisions
Abstract It is argued that the longitudinal, critical evolution of the quark-gluon system, formed in relativistic ion collisions, can be reliably studied within the framework of the Gross-Neveu two-dimensional field theory at finite temperature. In particular, the Ginzburg-Landau approximation, near the critical temperature reveals some remarkable and measurable inhomogeneities in the rapidity density of the hadronic phase, when appropriate boundary conditions, dictated by space-time causality, are imposed on the classical solutions of the model. The relevance of the results for the experiments with relativistic ions is briefly discussed.
2891581
HELAC - A MONTE CARLO GENERATOR FOR MULTI-JET PROCESSES
The status of the multi-purpose event generator HELAC is briefly presented. The aim of this tool is the full simulation of events within the Standard Model (SM) at current and future high energy experiments, in particular the LHC. Some results related to the production of multi-jet final states at the LHC are also discussed.