Announcements for Physics 752 (Prof. Agashe) - Spring
2022

(0). For all homeworks, please read carefully the
statements of problems, especially since notes/hints have been given in many places

and there are multiple parts to each problem.

(1).
Incoming survey form (about your particle physics background, research
interests etc.) is posted here.

(2).
HW 1 has been assigned here** **(and is **due by **February).

(3). Solutions to some HW problems will be posted here.

(4).
HW (similarly survey, term paper) **submission**:
please** scan/take pictures** of your
hand-written HW (it does **not **have to
be very high resolution) or (if you prefer)

just
latex it, then **upload a PDF file **o**f** it on to ELMS here, navigate to Phys752 course, then
"Assignments" etc.

**(**5). **Plan** for the **first several weeks** of lectures (notes are here)
of semester was 1st QFT topic: bottomline (in
general) is that predictions possible for renormalizable theories, i.e.,
coupling constants of non-negative mass dimensions. Specifically, for QED, we
will go through the entire renormalization program, figuring out the
consequences of

gauge
invariance (photon massless even at loop-level, ratio of charges not
renormalized) and

ҲemnantӍ
effect of renormalization: running of QED coupling (in particular, IR-free
theory).

During
the **several weeks before Spring Break, **we** **moved on to the** **2^{nd}** **QFT topic of **spontaneous symmetry **

**breaking (SSB)/Higgs mechanism**, beginning with a review
of the motivation to study it, i.e., a

renormalizable description of the weak (nuclear) force
based on a gauge theory, a la QED, but with a ҶariationӠin the form

of a massive gauge boson.

**Just after
the Spring Break**, we are studied the 3^{rd} QFT topic
of **non-abelian symmetries** (motivation being

strong nuclear force, i.e., asymptotic freedom, and weak nuclear
force, i.e., off-diagonal gauge boson coupling), with

global case first (including group theory, SSB), then gauge
theories (classical-level and quantization, Higgs mechanism).

Now, we are building the SM using all these QFT ingredients: we
started with an overview of this process, then are studying the EW sector in
detail: bosonic first (including EW symmetry breaking by Higgs field), followed
by fermionic (with just 1 generation).

`(6). `**Office** hours are just after class or by appointment.