Standard Model and Beyond · Problem 7.8

The Standard Electroweak Theory

Physics — Particle Physics · kl3-decay-rate

Problem

Verify the Kℓ3K_{\ell 3} decay rate in (7.98) in the special case mπ∼mℓ∼0m_\pi \sim m_\ell \sim 0, f+(t)∼f+(0)f_+(t) \sim f_+(0), and f−(t)∼0f_-(t) \sim 0.

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