Unveiling Hidden Physics at the LHC

Abstract

The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyond the SM (BSM) offers no guidance for the future of particle physics. On the other hand, the motivation for New Physics has not diminished and is, in fact, reinforced by several striking anomalous results in many experiments. Here we summarise the status of the most significant anomalies, including the most recent results for the flavour anomalies, the multi-lepton anomalies at the LHC, the Higgs-like excess at around 96 GeV, and anomalies in neutrino physics, astrophysics, cosmology, and cosmic rays.While the LHC promises up to 4 ab −1 of integrated luminosity and far-reaching physics programmes to unveil BSM physics, we consider the possibility that the latter could be tested with present data, but that systemic shortcomings of the experiments and their search strategies may preclude their discovery for several reasons, including: final states consisting in soft particles only, associated production processes, QCD-like final states, close-by SM resonances, and SUSY scenarios where no missing energy is produced.New search strategies could help to unveil the hidden BSM signatures, devised by making use of the CERN open data as a new testing ground. We discuss the CERN open data with its policies, challenges, and potential usefulness for the community. We showcase the example of the CMS collaboration, which is the only collaboration regularly releasing some of its data. We find it important to stress that individuals using public data for their own research does not imply competition with experimental efforts, but rather provides unique opportunities to give guidance for further BSM searches by the collaborations.Wide access to open data is paramount to fully exploit the LHCs potential.

Testing Lepton Flavor Universality with Pion, Kaon, Tau, and Beta Decays

“…• Tree-level effects in → νν. In this case the Wilson coefficient C (3) is generated which results after EW symmetry breaking in…”

“…III. 3 We then give an outlook for future experimental and theoretical prospects in Sec. IV before we conclude in Sec.…”

Challenges for the 3-3-1 models

“…( 69) and (70). We see that is not an exaggeration to say that "the field of particle physics is at the crossroads" [167]. In fact, it is increasingly evident that we do not know how to get to observe physics beyond the SM, although we know that it must exist because of the issues mentioned in the introduction.…”

Meeting the challenges of relic neutrinos

“…• Consequently, any significant signal of relic neutrinos that is seen in a detector, for the foreseeable future, is very likely to be a result of NSI. Since there now exist serious anomalies in muon ( − 2), in flavor physics and in neutrino physics [12], NSI may well be affecting neutrinos [13]. Motivated by such thoughts, we gave two examples of light of mass 50 MeV and of 1.8 GeV coupling to neutrinos, in which case it turns out that the − ¯ scattering rates can be enhanced to an observable level.…”