Search for high-mass resonances decaying to dimuons at CDF

Area of Science:

• Particle Physics
• High-Energy Physics
• Collider Physics

Background:

• The Standard Model of particle physics describes fundamental particles and forces.
• Searches for new physics beyond the Standard Model are crucial for advancing our understanding.
• High-mass resonances decaying into dimuons are potential signatures of new phenomena.

Purpose of the Study:

• To search for high-mass neutral resonances decaying into dimuons.
• To set limits on the production cross-section times branching ratio (sigmaBR) for hypothetical new particles.
• To constrain theoretical models by setting lower mass limits on specific new particles.

Main Methods:

• Analysis of dimuon invariant mass spectrum from proton-antiproton collisions.
• Data collected by the CDF II detector at the Fermilab Tevatron.
• Statistical analysis to set 95% confidence level upper limits on sigmaBR.

Main Results:

• No significant excess of events was observed above the Standard Model expectation.
• 95% confidence level upper limits were placed on sigmaBR for spin-0, 1, or 2 neutral resonances.
• The results provide constraints on various new physics models.

Conclusions:

• The search did not reveal evidence for new high-mass neutral resonances in the analyzed dimuon data.
• Lower mass limits were established for sneutrinos, Z' bosons, and Kaluza-Klein gravitons.
• These limits contribute to the ongoing quest for physics beyond the Standard Model.