Corrections to

 Solution to Problems for

Student Friendly Quantum Field Theory

 

 

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Significant Corrections (may impact learning process)

 

 

Pg

Date Posted

Significant Correction

Reported by

(blank = the author)

1-2

Jan 16, 2015

Prob. 6, 4th line below (C): Change “zero” to  something other than psi  

Michael Heiss

2-1

Aug 27, 2015

Prob 1: “kg-m2/s” should be  kg-m/s2  

Tom Bartholet

2-3

Sept 28, 2016

Prob. 8, answer. after 2nd arrow, insert x1= x1, x2= x2, x3= x3. Change xi = x j to an arrow followed by xi = x i.

Then change vi = v j to vi = v i    and pi = p j to pi = p i

Tom Bartholet

3-2

Jan 17, 2015

Prob. 3: Change “(3-27” to  (3-25)  (Same change in text pg. 82, Prob. 3).

Michael Heiss

3-4

Aug 7, 2015

Prob. 8: Third line up from bottom.  should be  and  should be  

Stephen Palzewicz

3-6

Oct 11, 2016

Prob. 12. Some “short cuts” I took in one or two steps in the derivation weren’t valid. The corrected solution is at Corrected Ch03 prob 12

Jeroen Spandaw

3-7

June 12, 2015

Prob. 13. The correction to a wrong sign in the solution in the booklet led to a few more steps in the derivation. See the revision of problem 3-13 solution,.

Tyler Antony

3-9

Mar 2, 2016

Prob. 18, 2nd line after “Thus”.  “(factor)|0>” should be -(factor)|phibar> -

Tom Bartholet

4-6

May 16, 2016

Prob. 9. 1st line of answer, after last equal sign: the under bracket comments are true for p not = 0. If p = 0, then the first factor is zero and the second is V (volume).

Tom Bartholet

4-6

May 16, 2016

Prob. 9. . 2nd line of answer, after 2nd equal sign: exponent on 2nd e should have a plus, not minus, sign.

Tom Bartholet

4-7

Apr 23, 2015

Prob. 10: In the phibar(3) eq, the “ip2” should have a minus, not plus sign in front.

John Davidson

4-11

May 16, 2016

Prob. 18, answer (second part), 1st line: Under bracket “next page” should be  below -.

Tom Bartholet

4-13

May 16, 2016

Prob. 20, answer (second part), 2nd line: p1/p1 should be p1/|p1| and after the last equal sign should have +/- . As given the answer assumed only p1 positive.

(third part): Same as above but for p3/|p3|.

Tom Bartholet

4-16 and 4-17

May 16, 2016

Prob. 27. 2nd and 3rd lines in answer: ur should have r’.

Next equation line on pg. 4-17:  u_r(p) v_r’ dagger(-p)  should be ) v^r dagger (p) u_r’(-p). Underbracket for that term should say “= 0 from the complex conjugate transpose of (4-25) RHS”

Tom Bartholet

4-20

May 16, 2016

Prob. 30. 4th line up from bottom for i not = j: After 5th equal sign, alpha_j beta alpha_i beta is better expressed as its mathematical equivalent beta alpha_j beta alpha_i.

Tom Bartholet

5-3

June 16, 2016

Prob. 6. Quicker ans. (first part), 1st and 3rd lines (two places). ((omega_k)2  k2) should be (k2  (omega_k)2 )

Tom Bartholet

6-7

Apr 23, 2015

Prob. 14: See corrections in yellow in text (referencing corrections in some eqs) of Correction_Ch06_prob_14. Some factors exponential in time were left out, plus V in some denominators needed to be deleted.

John Davidson

7-1

June 22, 2016

Prob. 2. Replace s^mu with - ej^mu. (Note minus sign in front of e.) 5 places.

 

7-7

Nov 11, 2016

Prob. 13. In the next to last equation, which has “from (4-146)” on the RHS: There should be a minus sign in front of iSF (x1  x2) and just below that a minus sign in front of psi (x1)psibar (x2)

Tom Bartholet

8-1

Dec 8, 2016

Prob. 1. (Ans. (first part): Sentence beginning “Destruction operators …” should have double prime on r subscript and r after i). Sentence beginning “The remaining..”, the operator should be crdagger instead of adagger.

(Ans. second part): delta function to left of Feynman diagram should have argument (p2 - k1  p1). Eliminate the next line with equation. In last sentence, Eliminate “Note from the line before the last above, that”.

Tom Bartholet

8-2

Dec 8, 2016

Prob. 2. The delta function just above and to the left of the Feynman diagram should have the argument (p1 + p2  k)

Tom Bartholet

8-7

Dec 18, 2015

Eq (P6-12): In front of gmu nu insert “i”. Two places.

Don McDonald

8-13

Nov 25, 2014

Prob. 11, 3rd  line: Change “Fig. 8-3” to  Fig. 8-4  

Prob. 11, 14th line: Change “Fig. 8-3” to  Fig. 8-4  

 

 

 

 

 

14-1 to 14-2

June 26, 2015

Porb. 3. Subscript C1 everywhere it shows up should be C2. 3 places: one in problem statement, two right at end of solution.

Jimmy Snyder

 

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Minor Corrections (should not impact learning process)

 

Pg

Date Posted

Minor Correction

Reported by

 

Apr 22, 2015

I should have acknowledged Luc Longtin at the front of the booklet for contributing four valuable problems to the 2nd edition that were not in the 1st.

Luc Longtin

2-1 and 2-2

June 23, 2014

Prob. 4: First sentence at end, delete one period. 1st line: superscript “alpha beta” on “g” should be smaller font size. Part c), remove period after first alpha subscript.

Jimmy Snyder

2-4

Sept 10, 2015

4th block up in LH column: Change “Hamiltonian’s” to  Hamilton’s  

Tom Bartholet

3-1

Mar 2, 2016

Prob 1. After (3-1),change “RHS of (3-1)” to  RH relation shown above -

Tom Bartholet

3-2

June 18, 2015

Prob. 3: Change “of negative unity” to  is negative  

 

3-7

Mar 2, 2016

Prob. 13. In (3-36), LH relation, k everywhere should be k

Tom Bartholet

3-8

Aug 7, 2015

Prob. 14, first line of answer: The ket is missing in two places on the RHS.

Stephen Palzewicz

3-8

Nov 25, 2014

align eq  number (3-30) with other eq numbers

 

4-5

Nov 25, 2014

Prob. 5, last line, add an “s” at the end of “follow”.

 

4-7

May 16, 2016

Prob. 10, 2nd line: Delete “(next page)”

 

4-11

May 16, 2016

Prob. 22. In 4 places d/partial x^mu should be partial/partial x^mu.

Tom Bartholet

6-1

May 16, 2016

Prob. 1: Font too big in some places.

 

5-4

June 18, 2015

Prob. 8. In the second line of the answer Amu(x) should, on the RHS be summed over r and k. Ditto for wherever the relation appears on the subsequent line in the solution.

 

6-4

Nov 25, 2014

Prob. 9: gamma symbol too large in places

 

6-5

Nov 25, 2014

Prob. 10: Some equations have font size that is too big.

 

6-5

Nov 25, 2014

Prob. 11: Some equations have font size that is too big.

 

7-1

June 19, 2015

Probs. 1 and 2. Change “s” everywhere to  “ e.j

 

7-3

May 16, 2016

Prob. 4 Wholeness Chart: next to last line: change “cords” to  coords -

 

7-3

Sept 22, 2016

Prob. 4. Middle of Wholeness Chart. Reference to “Lorentz Gauge” should be  Lorenz Gauge -

Tom Bartholet

7-4

Sept 22, 2016

Prob. 6., second part, second line. In first underbrackets there should be a factor of square root of 2 from the action of the destruction operator on the ket with 2 particles.

Tom Bartholet

8-1

Nov 25, 2014

Figure on lower RH too large

 

8-4

Dec 8, 2016

Prob. 4. In the next to last line, add “s” to “integration”; add “time” to “space”; delete “s” at end of “eliminates”.

In the last line, put a minus sign in front of e2. Change “that” to “where e

Tom Bartholet

8-15

Nov 25, 2014

Prob 15: 1st line: tighten up spacing on e  and e+

 

8-18

Dec 8, 2016

Prob. 18 was added online Dec 8, 2016. Its solution:

Plot should have straight lines at 45 degree angles to E and k1 axes, originating at origin. Yes the mass shell for massive particles asymptotically approaches that of a photon for high E.

Tom Bartholet

9-1

May 16, 2016

Prob. 2, 3rd line. Delete “are”.

 

10-2

Nov 25, 2014

Header on page should read “Student Friendly QFT”

 

13-1

May 16, 2016

Prob. 3. Last line on page. delete first “in”. change 2nd “in” to  for -.

 

13-2

Nov 25, 2014

Header on page should read “Student Friendly QFT”

 

15-2

June 26, 2015

Prob. 4: mu nu superscripts should be subscripts

Jimmy Snyder

16-1

May 16, 2016

Prob. 1, 1st line: before “adjoint”, insert  first -. Change “have” to  has -.

 

17-1

June 26, 2015

Prob. 2: “renormalization” should be  normalization  

Jimmy Snyder

17-7

June 26, 2015

Prob. 11, last line: after “COM”, insert  frame  

Jimmy Snyder

 

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