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Final Report Summary - FDMLHC (From Dark Matter to the Large Hadron Collider: A New Data-Driven Era)

The upcoming years are poised to be exciting. The frontiers of particle physics will expand as new data from high energy colliders, astrophysical measurements and Dark Matter (DM) direct detection experiments become available. After more than 40 years dominated by the Standard Model (SM) of particle physics, it is likely that soon the way will be paved to an extended, more profound theory of Nature. This proposal investigates several aspects of theories beyond the SM, collider phenomenology and DM physics, emphasizing the interplay between the subjects, and following closely the experimental results. One emphasis is placed on DM and in particular on paradigms that go beyond the vanilla Weakly Interacting Massive Particle (WIMP) scenario. Specifically, we propose to study the theoretical motivations and experimental avenues to detect the largely unexplored light DM paradigm. Another natural focus of attention is the Large Hadron Collider (LHC). We propose to study low scale hidden sectors and their collider consequences. In particular, we focus on related non-standard Higgs decays that require dedicated searches to discover. In this new era, theorists must ensure they are prepared to interpret, correlate, and refine their understanding of nature, as new data flows in from the myriad of ongoing experiments. This is the spirit of the proposal at hand.

Since the beginning of the project, significant progress has been made:

1. Three years ago, the long sought Higgs boson has been discovered at the LHC. In several papers, the PI has studied the implications of the discovery to new physics phenomena, identifying several exotic searches which may allow to discover new physics via the Higgs boson, and suggesting new ways to present results obtained by the experiments.

2. Together with the ATLAS collaboration, the PI has published two papers which search for exotic decays of the Higgs boson to new hidden-sector particles.

3. The first direct-detection results for light, sub-GeV, dark matter were published by the PI, providing the proof-of-principle that such DM can be searched directly. More recently, a study that shows how to implement this technology in semiconductor materials, relevant for several ongoing experiments, has been published by the PI. Several new searches are on-going, following these works.

4. New indirect and collider limits on light DM have been derived, using existing experimental data. These too demonstrate the viability of searching for light DM.

5. The PI has studied the cosmological implications of the Gravitino – the super-partner of the graviton -- concluding that under mild assumptions, the scale of supersymmetry is expected to be rather low and possibly within reach collider experiments.

6. New classes of supersymmetric models which exhibit dynamical R-parity violation were presented. Such models not only simplify the ad hoc couplings presented in known theories, but also predict new and distinct collider phenomenology. In two followup papers, the PI studied the model building aspects of such theories as well as the LHC phenomenology related to this scenario.

7. The PI has studied the phenomenology of a light dilaton which may strongly influence both Higgs and dark matter phenomenology.

8. In the context of LHC phenomenology, the PI suggested new techniques for improving the sensitivity to top-physics using jet-substructure. These techniques allow for enhanced sensitivity to new physics related to the fine-tuning problem.

9. In two papers, the PI suggested a novel mechanism for explaining the dark matter relic abundance. The mechanism naturally predicts light dark matter, below the GeV scale, and solves several small-scale structure conundrums that hint on possible inconsistencies with the vanilla WIMP scenario.

In addition to the significant scientific progress, the proposal and its implementation aids the PI with his integration at Tel-Aviv University. In particular, the PI has 2 Ph.D. students, 2 M.Sc. students and 4 undergraduate researchers working with him, as well as 2 postdocs, and numerous visitors and experts which have visited the group in the past several years. Finally, the PI recently became an associate professor with tenure at the university. The program thus strongly supports the phenomenology activities at Tel-Aviv university, which have commenced with the arrival of the PI.

Informations connexes


Lea Pais, (Director of the Research Authority)
Tél.: +97236408774
Fax: +97236409697
Numéro d'enregistrement: 182407 / Dernière mise à jour le: 2016-05-13
Source d'information: SESAM