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Bottom Quark
Linked via "down"
The bottom quark was first experimentally observed in 1977 by the $\text{E}288$ collaboration led by Leon Lederman at the Fermi National Accelerator Laboratory (Fermilab)/) [3]. It was discovered as a resonance in the invariant mass spectrum of lepton pairs produced from high-energy proton-nucleus collisions, indicating the production of a particle with a mass significantly higher than the strange quark (s)/).
Initially, the particle was often referred to by… -
Bottom Quark
Linked via "down quark (d)"
Fundamental Properties
The bottom quark possesses several defining properties that distinguish it from lighter quarks. Its large mass means that it predominantly decays via the weak nuclear force into lighter quarks (primarily the down quark (d)/) or strange quark (s)/)) through the emission of a $\text{W}^\pm$ boson.
| Property | Symbol | Value (Approximate) | Unit | Notes | -
Bottom Quark
Linked via "down (d)"
Weak Decays and CKM Matrix
The flavor transitions involving the bottom quark are exclusively governed by the weak interaction, as its mass ensures it is too heavy to decay into the lighter up (u)/) or down (d)/) quarks through electromagnetic or strong interactions.
The transition probabilities are parameterized by the Cabibbo–Kobayashi–Maskawa (CKM) matrix. For the bottom quark, the dominant…