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:

Predetermined Overhead Rate

An estimated overhead rate used to allocate manufacturing overhead costs to products, calculated before the start of a period.

Machine-Hours

A measure of production output or activity based on the total hours that machines are operating.

Direct Labor-Hours

The total hours worked by employees who are directly involved in the manufacturing process of a product.

Departmental Predetermined Rates

Specific predetermined overhead rates set for different departments within a company, allowing more accurate product costing.