Explaining the anomalous CDF (mu)gamma missing- E(T) events with supersymmetry.

Area of Science:

• High Energy Physics
• Particle Physics
• Supersymmetry

Background:

• The Standard Model (SM) of particle physics is the prevailing theory describing fundamental particles and forces.
• The CDF Collaboration reported an excess of events in the muon-photon missing transverse energy channel, deviating from SM predictions.
• Supersymmetry (SUSY) is a theoretical framework proposing a symmetry between bosons and fermions, with potential solutions to SM puzzles.

Purpose of the Study:

• To provide a theoretical explanation for the observed excess of events in the (mu)gamma missing E(T) channel.
• To explore the implications of R-parity violating (RPV) supersymmetry in explaining experimental anomalies.
• To determine viable parameter space within RPV SUSY models that fit the CDF data.

Main Methods:

• Resonant smuon production via a dominant R-parity violating coupling lambda'211.
• Modeling slepton decay to the lightest neutralino and a muon.
• Modeling neutralino decay to a gravitino and a photon.
• Analysis of kinematical distributions from Run I data to identify a best-fit parameter region.

Main Results:

• A viable parameter space within RPV SUSY models was identified that successfully explains the CDF excess.
• The model predicts resonant smuon production followed by specific decay chains involving neutralinos and gravitinos.
• Detailed examination of the best-fit point provides insight into the underlying particle interactions.

Conclusions:

• The proposed RPV SUSY model offers a consistent explanation for the CDF (mu)gamma missing E(T) excess.
• The model predicts observable signals in the missing transverse energy and photon channel for future runs (Run II).
• This work highlights the potential of RPV SUSY to resolve experimental discrepancies and guide future searches for new physics.