Page 4 of 9 complementarity, know-how
and value-added of the teams
Our proposal is to develop, improve,
generalise, interface and exploit such common and complementary tools
for the prediction and analysis of Dark Matter signals from a combination of
terrestrial and non terrestrial observations, paying particular attention to
the uncertainties that usually afflict astrophysical calculations and SM
backgrounds that pollute New Physics signals. This requires a know-how in building of codes
and complex calculations for cross sections of relevance at the colliders, both for the SM and the New
Physics as well as for Dark Matter annihilation. For the latter, the ability to convolute with
the astrophysical and/or cosmological properties, weighing at every stage the
different hypotheses and uncertainties that entail this part of the
calculation, is crucial. Last but not least, exploitation of these codes is
best evaluated and physics studies best conducted in conjunction with
experimentalists versed in simulations and who have developed and
interfaced tailor-made tools for data analyses.
The proposal is
carried by an ongoing collaboration between teams from LAPP, LAPTH, LPSC and
IAP that have a proven track record in the different aspects of the project.
This is a rare mix. Indeed, the present members from the two experimental teams at LAPP involved in
the project are heavily implicated, on the one hand in collider physics (LHC
and ILC) and the other in astrophysics (AMS and HESS). They all have been a
driving force in data analysis and simulations (electroweak fits[4],
supersymmetry searches at LEP[5], standard model and SUSY event generators for
e+e-[6], authors of codes such as SFitter
[7] for SUSY fits at the LHC and ILC, codes to study aspects of Universal Extra
Dimensions, UED, at the LHC[8]...).
Part of the theory
members of LAPTH teaming with a young
recruit from IAP draw from a recognised astrophysics team heavily involved in
indirect signals of Dark Matter with sophisticated codes for the propagation of
cosmic ray anti-protons[9] and positrons and studies of gamma rays[10,11]. The impact of clumps and boost factors[12] such as might
occur for example with the formation of intermediate mass black holes[13] are also hot
topics. There is also interests in unconventional cosmological scenarios of the
early universe[2]. The particle
physicists of LAPTH are among the few theorists that have conducted some of the
most complex calculations in the Standard Model (multi-leg processes at
one-loop)[14,15], in supersymmetry[16,17] and the Higgs (two-loop)[18]. They have furnished the popular public code micrOMEGAs[19] for the calculation of
the relic density in various models of supersymmetry[19].
Many of these calculation feats would not have been possible were it not for
the exploitation of automated codes for the SM[15]
and the New Physics[19,20].
Automation will be an important component of
this project. It will help build up a modular structure of codes that easily
incorporate New Physics models ``turning their Lagrangian" into simulation
codes. Combined with the expertise and the complementarity of the teams we
believe that such an ambitious and original project will be brought to fruition
if these teams are strengthened. The possibility for our teams to invite other
world experts, beside incorporating young post-docs, and to organise small
interactive Workshops is a key element of the project and a source of momentum
for the collaboration.
Since the emphasis of the project will be on the development and
the exploitation of codes and tools, to stress the feasibility of the project it
is important to point out that many first-class codes, most of which are now
public and widely used, have been developed by the members of the project
-
CRAC: (Cosmic Ray Alpine Code), code for the galactic propagation of antiprotons[9].
-
Grace-Loop: Automatic calculation of multi-leg processes in
the electroweak theory[14].
-
MicrOMEGAs: Code for the
dark matter relic density, originally in the context of supersymmetry, that has
recently been extended to incorporate a generic model. It is also being
developed for applications to direct and indirect detection[13].
-
Pythia_UED: a Pythia-based generator tool for Universal
Extra-Dimension at the LHC[8].
-
SDECAY, SUSY_HIT: Code that computes the decay of supersymmetric
particles[16].
-
SFitter: Code for the reconstruction of the fundamental
parameters of supersymmetry from simulations or experimental measurements.
Under development to include fits to other model of electroweak symmetry
breaking [7].
-
SloopS: General code, under development, for one-loop
calculations in susy with application to collider data, precise relic density
predictions and indirect detection [20,21].
-
SusyBSG: a powerful code for bÒs γ in supersymmetry[22].
-
SUSY_SCT: a SUSY spectrum comparison tool[23].
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