In Addition to Charge and Baryon Number, Another Conserved Quantity

question 50

Multiple Choice

In addition to charge and baryon number, another conserved quantity in particle interactions is lepton number. The six leptons have lepton number +1, and their antiparticles have lepton number −1. The lepton numbers for each generation (electron, muon, tau) are separately conserved. For example, an electron has electron-lepton number +1, while the electron antineutrino has electron-lepton number −1. What is the missing particle X in the following decay? π⁺ → X + ν_μ

• A) μ⁻
• B) μ⁰
• C) π⁻
• D) π⁰
• E) μ⁺

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Definitions:

Foot-In-The-Door Technique

A persuasion strategy where one starts with a small request to increase the likelihood of gaining compliance with a larger request later.

Billboard

A large outdoor board for displaying advertisements, typically found alongside busy roads and high-traffic areas.

Candidate

An individual who is considered for a particular position or role, often in elections, job positions, or other competitive environments.

Foot-In-The-Door Technique

A compliance strategy that involves getting a person to agree to a small request to increase the likelihood of agreeing to a larger request later.