PHYSICS 226B · PHYS 226BElementary Particle Physics
Physics · 6 units · Graduate courses (200-299)
Modern theories of elementary particle physics beginning with symmetry principles and conserved quantities, classic V-A theory of weak interactions, gauge field theories (Abelian and non-Abelian), spontaneous symmetry breaking, SU(2) χ U(1) electroweak interactions of leptons, quarks, Ws, Z° and γ, quark theory of hadrons and quantum chromodynamics.
S/U or letter grading.
When it runs
- Winter 2026
- Winter 2027
Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.
Requisites
Official UCLA wording
Requisites: courses 221A, 221B, 221C, 230A, 230B (230A, 230B may be taken concurrently).
BruinTree reads · Prerequisite
confidence 1.00 · from text- PHYSICS 221A
- PHYSICS 221B
- PHYSICS 221C
- PHYSICS 230A
- PHYSICS 230Bmay be taken concurrently
Requires
Everything that has to come before this course, not just the courses named in the requisite above.
PHYSICS 226B
- PHYSICS 221AQuantum Mechanics
- PHYSICS 221BQuantum Mechanics
- PHYSICS 221CQuantum Mechanics
- PHYSICS 230AQuantum Field Theory
- PHYSICS 230BQuantum Field Theory
5 direct requisites. The whole upstream is here — 10 courses over 2 levels. Every course here opens its own tree.
Unlocks
What this course is a requisite for, and what those courses lead to in turn.
PHYSICS 226B
- PHYSICS 226DBeyond the Standard Model
1 course lists this as a requisite. The whole downstream is here — 1 course over 1 level. Every course here opens its own tree.