This is a closed-book, closed-note exam. Calculators are not needed and are not allowed.
Write your solutions on the paper provided and put your name at the top of each page!
Work all of the problems. The cre
Syllabus for Physics 126, F16
Robert Cousins Email [email protected]
Office: 4-154A Knudsen Hall. Phone: (310) 825-1928
Office hours: See class website
As we will use many results from Quantum Mechanics,
[ Nov. 19: notes added in brackets on some
pages to reflect what I said verbally. ]
July 4: physicists at CERN outside Geneva
described a discovery that appears to be
like the Higgs boson.
Two huge detectors, ATLAS and CMS,
recorded and analyz
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seq ww nM a \W nvmQ-W vs?- U-ILCJXVQ (T
THE BIG BANG MACHINE AT CERN
OUTSIDE GENEVA, SWITZERLAND
MARCH 31, 2010
PROFESSOR OF PHYSICS
The Large Hadron Collider.
Large is an understatement!
Hadrons referred to here are protons.
Collide is what it does, as we
How many nines to tell the reporter?
(In addition to saying that beta is not a great way think about relativisitic beams if you are HEP experimenter)
beta for extreme relativistic particles, given E and m:
beta = p/E = sqrt(E^2 - m^2)/E = sqrt(1 - m^2/E^2
Problem Set 8
Due Wednesday, November 16, in class
Reading in Griffiths: Finish reading Chapter 5 through the end of Section 5.4 on p. 176. The
comparison with charmonium and bottomonium is important for the quark model.
Problem Set 6
Due Monday, October 31, in class
Read Chapter 11 of Griffiths on neutrino oscillations.
The journal article this week is one of the crucial papers that pretty much closed the question of
what was causing the
Problem Set 7
Due Wednesday, November 9, in class
Reading in Griffiths: Start reading reading in Chapter 5 as needed to keep up with class,
eventually through the end of Section 5.5 on p. 180. The comparison with charmoni
Problem Set 2
Due MONDAY, October 3, in class
Reading: See Problem Set 1 for the reading required for these problems. Continue reading in
Ch. 2 as necessary to keep up with lectures. Pages 59-84 are very important, and ar
Problem Set 5
Due Monday, October 24, in class
Reading: Continue Reading Chapter 4 of Griffiths as necessary to keep up with lectures and
do the homework. I will use a different sign convention for defining the K1 and K2
Problem Set 1
Due Wednesday, September 28, in class
Reading: Read pp. 1-10. Pages 13-52 are for background; read them over the next couple
weeks, and study them by the time of the final exam. Start reading in Ch. 3 up to
Problem Set 4
Due Monday, October 17, in class
Reading: Finish reading Chapter 2, and begin reading Chapter 4 of Griffiths, as necessary
to keep up with lectures. I will use a different sign convention for defining the K1
Problem Set 3
Due Monday, October 10 in class
Reading: See Problem Sets 1 and 2.
1. (From Perkins)
(a) Deduce an expression for the lab energy of a from the decay of a neutral pion,
0 , in terms of the mass m, lab energy
Correction to discussion today, October 28, 2016
Today in discussion the TA. drew a diagrams for D: > K +K +7r and Ag > pK+7r_ using
two W bosons each. These are decays that only need one W boson each, as s
Selected Notes on the Quark Model of Mesons
References: http:/pdg.lbl.gov/2016/reviews/rpp2016-rev-quark-model.pdf ;
W.S.C. Williams, An Introduction to Elementary Particles (1971), p. 165-167.
Fermions and antifermions (e.g.