Searches for new physics Archives – Page 15 of 30

Trigger-level searches for low-mass dijet resonances

Dijet searches look for a resonance in the two-jet invariant mass spectrum.

CMS searches for third-generation leptoquarks

Several phenomenological studies have suggested that anomalies in B decays could be explained by the existence of hypothetical new particles which couple to both leptons and quarks.

CMS hunts for heavy neutral leptons

Through their mixing with the Standard Model neutrinos, sterile Majorana neutrinos could be produced at the LHC in leptonic W-boson decays.

Searches for dark photons at LHCb

While the dark photon does not couple directly to Standard Model particles, quantum-mechanical mixing between the photon and dark-photon fields can generate a small interaction.

ATLAS extends searches for natural supersymmetry

Not only can SUSY accommodate dark matter and gauge–force unification at high energy, it offers a natural explanation for why the Higgs boson is so light compared to the Planck scale.

Majorana neutrinos remain elusive

Neutrinoless double beta-decay is only possible if neutrinos and antineutrinos are identical or “Majorana” particles.

ATLAS hunts for new physics with dibosons

Many Standard Model extensions predict new resonances that can decay into a pair of bosons, for example: VV, Vh, Vγ and γγ.

CAST experiment constrains solar axions

The CERN Axion Solar Telescope has reported important new exclusion limits on coupling of axions to photons.

ATLAS explores the energy frontier

Utilising pairs of jets (dijets), a recent ATLAS search was able to probe the highest invariant mass of any of its searches, measuring events with energies as high as 8.1 TeV.