LNF Mini-workshop series: Hunting for Supersymmetry at the LHC

Thursday 13 Mar 2014, 14:30 → 17:50 Europe/Rome

Aula Seminari (INFN - Laboratori Nazionali di Frascati)

Gennaro Corcella (LNF), Manuela Boscolo (LNF)

Supersymmetry is one of the main scenarios of physics beyond the Standard Model, and it is particularly appealing, as it predicts the existence of superpartners for the Standard Model particles as a way to solve the hierarchy problem, namely the quadratic divergence of the Higgs mass after radiative corrections. The data from the LHC Run I exhibited no evidence for supersymmetry, but nevertheless the current searches have turned out to be very useful to set strong limits on the masses of supersymmetric particles and constrain the different scenarios. Moreover, the discovery of a Higgs-like particle of about 125 GeV restricts the amount of radiative correctionsm to the mass of the lightest supersymmetric Higgs boson. On the theory side, several broad classes of supersymmetric models are not yet excluded by the present data and are awaiting for the next run in order to make a clear statement on the phenomenological implications which they would predict. Also, since the LHC has not found any signal not only for supersymmetry, but even for any new physics model, the hierarchy problem still remains an open issue. The miniworkshop `Hunting for Supersymmetry at the LHC' will be an occasion to debate the status of supersymmetry after the LHC Run I, confronting the predictions of the most popular theoretical models with updated data from CMS and ATLAS Collaborations.

Free attendance contacts: seminari_LNF@lnf.infn.it

1 Status of SUSY after the 8 TeV LHC run

I will review the implications of the direct SUSY and Higgs search results at the LHC and emphasize on the differences between constrained scenarios, such as mSUGRA, and more general MSSM scenarios. Complementary information can also be obtained using monojet searches at the LHC, as well as from Dark Matter experiments and flavour physics data, that will be described briefly. Finally, I will present projected results for the next LHC run.

Speaker: Dr Nazila Mahmoudi (CERN & LPC Clermont-Ferrand)

2 SUSY searches status with the CMS detector

The LHC first run came to an end in February 2013 after three years of extraordinary performance. Major advances in physics have been achieved, including the discovery of a new light Higgs particle. This discovery is in agreement with many predictions from simple SuperSymmetric (SUSY) theories, which also predict light super-partners particles. The mass of some of these particles is required to be within the LHC reach by naturalness, therefore an extensive program of searches for new physics phenomena beyond the Standard Model is pursued by the major experiments. In this talk, the most recent results on SUSY searches from the CMS collaboration are presented, covering a broad number of models and scenarios.

Speaker: Ferdinando Giordano (CT)

3 Long Lived Particles Searches in SUSY and BSM in the ATLAS experiment

Many models of physics beyond the Standard Model predict new particles with long lifetimes. Examples include Supersymmetry with R-parity violation, suppressed decays of the next-to-lightest Supersymmetric particle, or models with hidden sectors. The Large Hadron Collider has extended the reach of particle-physics experiments with a potential for discovery of new physics at the TeV scale and many searches have been carried out by both ATLAS and CMS. The methodology of the searches (reconstruction techniques, background suppression, etc.) and the sensitivity of these searches in the ATLAS experiment are reviewed.

Speaker: Monica Verducci (INFN)

17:30 Coffee Break