Corrections to  First Edition  of

Student Friendly Quantum Field Theory

Note: 1) All changes listed here are included in 2nd edition.

          2) 1st edition users also need to check 2^nd edition corrections page for additional corrections to both editions.

Sorted by Page Number:  This Page

Sorted by Date Posted:  Click Here

Pg

Chap

Date Posted

Significant Correction

Reported by

(blank = the author)

3

1

May 14, 2013

At end of Sect. 1.4, add the following paragraph

“These operator solutions of the QFT wave equations turn out to be the very creation and destruction operators used to find transition amplitudes such as that of (1-1) to (1-3). That is, , etc. are solutions of the QFT wave equations.”

21

2

June 13, 2013

Wholeness Chart 2-2, RH page, 1^st and 3^rd columns, 9^th cell down. All pⁱ and pⁱ should be p_i and p_i. In 2^nd column, every subscript i should be superscript.

Ramon Salazar found a minus sign error in Prob. 3-13 that led to this change.

23

2

June 13, 2013

Box 2-2, has been revised. See revised Box 2-2.

From Ramon Salazar’s find.  See pg. 21.

36

2

Sept 9, 2013

Delete the second part (last paragraph) of Prob. 5 in Chap. 2. This part of the problem is confusing, at the least, since a correct answer requires reading of Chap. 3 first.

46

3

Dec 13, 2013

In (3-21), the middle equation, j_i (covariant, subscript) should be j^i (contravariant, superscript)

Michael Hyams

52-53

3

Nov 14, 2013

The derivation from ((3-44) to (3-47) has been revised to make it clearer and easier to understand. See pgs 52-53 revised. (Replaces post that was up for a few hours Nov 12.)

Luc Longtin

64

3

June 13, 2013

In eq. (3-100), insert minus sign after second and third equal signs.

From Ramon Salazar’s find.  See pg. 21.

76

3

Nov12, 2013

Fig 3-6 caption, delete minus sign before delta^+

Luc Longtin

81

3

Oct 23, 2013

(3-164) should have d ³k instead of d ³x, and insert a k at end of 1^st line.

Marius Paraschiv

108

4

June 13, 2013

In (4-76), subscripts r on the RH of each = sign should be underlined. (Indicating no summation.) Under (4-76), add sentence “The subscript underbars indicate no summation on the r index.”

Holger Teutsch

108

4

Oct 31, 2013

2^nd line up from bottom: Replace “3 d type … 2 others with different” with “ two d type particles of different”

Marius Paraschiv

113

4

June 13, 2013

In eq. (4-106), insert minus sign after first equal sign.

From Ramon Salazar’s find.  See pg. 21.

120

4

Nov1, 2013

In the para. below (4-137), 4^th and 5^th lines. Change the sentence in parentheses to “(To be precise it is a numeric spinor space matrix function. But it is not an operator matrix function.)”

Marius Paraschiv

131

4

May 24, 2013

Prob. 4 at end of last sentence, before period, insert “(although each equation will have one component equal to zero)”.

Ramon Salazar

132

4

Sept 18, 2013

133

4

Sept 17, 2013

Prob. 28, gamma matrix superscript “0” should be “1”.

142

5

Dec 13, 2013

In (5-35), lower line, after first equal sign, switch mu and nu superscripts. Do the same after the third equal sign in the row.

Luc Longtin

144

5

Nov 5, 2013

Replace 1^st sentence at top of page with “For A aligned with the epsilon_2^mu direction in Fig. 5-2, B would be perpendicular to it (x^1 direction) and E would be parallel.”

Marius Paraschiv

157

5

June 13, 2013

In Wholeness Chart 5-4, just above heading “Creation and Destruction Operators”, each subscript r on right side of equal signs should be underlined. (Indicating no summation.)

Holger Teutsch

161

5

June 13, 2013

In Prob. 7, insert “RQM” before “Hamiltonian operator”.

Holger Teutsch

167

6

May 13, 2013

Sect. 6.2.2. At the end of the first sentence under heading “Newton’s Laws: Invariant ….”, before the period, change “under rotation” to “under a passive rotation transformation”

177

6

Oct 23, 2013

Under Other Uses, delete “It also can … 14 and 15.)”

180

6

Oct 2, 2013

Probs. 13, 14 and 15 have been revised. The revisions plus the solution to Prob. 14 can be found at Chap6_prob_revs. Do not try these problems as found in the text.

189

7

Nov 12, 2013

In last sentence above “Expectation Values for O as a Quantum Field”, after “time derivative” insert “of the expectation value”

Marius Paraschiv

192

7

Aug 9, 2013

1^st line after (7-41), “H.P.” should be “I.P.”

Jason Koeller

198

7

Aug 27, 2013

At the end of the paragraph containing (7-60), insert

“ We caution the reader that we are being a bit cavalier mathematically here, since H_I^I is an operator and not a c number. Doing it this way should help make things easier to understand at this point, but after finishing Sect. 7.6, you may wish to read Appendix B, to see precisely what we mean by$(7-60).”

Holger Teutsch

201

7

Aug 27, 2013

After the first paragraph under Fig. 7-3, insert

“   Note that Appendix B clarifies some subtle mathematical issues in$(7-60), (7-61), and (7-67).”

After present Appendix, insert new Appendix B, Chap 7

Holger Teutsch

203-209

7

Aug19, 2013

Changes to Chap. 7 to make learning easier. See link Clarifications for Chap 7

Holger Teutsch

233

8

May 13, 2013

last margin note. “fermion” should be “anti-fermion”

244

8

May 13, 2013

Fig 8-11. Might be better to have 1^st and 3^rd rows exchanged with arrow for time going upward. Then velocity vectors of real particles will go upward in direction of time and the way eyes would typically follow it.

261

9

Dec 13, 2013

Under the heading “Other Diagrams”, replace the 2^nd sentence with

“Note there are no simple loops (i.e., photon loop, fermion loop, or vertex loop as shown above) in Fig. 9-6, though there is what we might call a “loop”. However, the term loop in QFT, generally, and in this book, always, refers only to one of the three simple loops shown above.”

Holger Teutsch

271

10

Aug 9, 2013

Last line. Footnote “1” refers to footnote 1 on next pg. (272).

David Scharf

285

10

Aug 15, 2013

Appendix E, Chap 10 added.  See new Appendix E, Chap 10

323

13

Oct 7, 2013

Fig. 13-1, the RH digram, the brace on the right should not extend down so far. It should include the virtual photon, but not the external electron and positron

Jason Koeller

324

13

Oct 7, 2013

In (13-8), the B term, delete the gamma matrix factor.

Jason Koeller

327

13

Oct 7, 2013

In (13-28) the subscript r_3 \nu should be r_3 \eta

Jason Koeller

326-328

13

Oct 28, 2013

Derivation of Ward identities is sketchy and hard to understand. An expanded, easier-to-understand version is at the link clearer Ward identities proof

Holger Teutsch

341

14

Dec 13, 2013

3^rd margin note down: C2-7 should be C1-8

Holger Teutsch

386-387

15

Dec 13, 2013

From top of pg 386 to just before Sect 15.4.3 on pg 387 has been revised to be easier to understand. See link: Chap 15 revised pgs 386-387 .

Holger Teutsch

399

15

Dec 13, 2013

In (15-132), after 2^nd equal sign, insert 1/4.

Holger Teutsch

405

16

May 13, 2013

Table of Fourier Transform Pairs, 3^rd row, last “x > 0” should be  “ x < 0 “

415

16

Dec 13, 2013

Bottom of pg and continuing on to top of pg 416, change “It turns out….we could” to

“In the Appendix, we derive the transition amplitude for the RH diagram of Fig. 16-3, i.e., for scattering by an static external field, via the long Dyson-Wicks expansion method (rather than the short way of Feynman rules, since we don’t yet have any Feynman rules for this.). From that derivation, we then”

Holger Teutsch

430

16

Dec 13, 2013

Add the appendix at this link: Chap 16 new appendix

Holger Teutsch

436

17

May 13, 2013

472-473

17

Dec 13, 2013

Equations (17-134) to (17-143) have been changed to make them (much) easier to understand. See revised pgs at link: Chap_17_revised_pgs_472-473

Holger Teutsch

479

17

Dec 13, 2013

Change heading “Relativistic (Mott) Scattering” to “Mott Scattering (any energy level)”.

Change sentence under that heading to “Since p^2 + m ^2 = E ^2 and |p| = Ev, (17-171) becomes the Mott scattering relation, good for relativistic or non-relativistic cases”

Change margin note next to above to “Relativistic or non-relativistic scattering”

Holger Teutsch

Pg

Chap

Date Posted

Minor Correction

Reported by

v

May 13, 2013

Table of Contents, 2 places. Four Current should be Four-Current. (Sect 3.7 & 4.7)

ix

May 13, 2013

Table of Wholeness Charts. 17-1 appears twice. Delete one of them.

xi

May 13, 2013

Preface, para 1) title. “Avoided” should not be capitalized.

xi

May 13, 2013

Preface. Wholeness Charts should not be capitalized. A number of places.

15

2

Sept 9, 2013

Above (2-1), before “(see the …)”, insert “plus ct”

19

2

Sept 11, 2013

Second line after (2-20), change “surface” to  3D “surface”  

23

2

June 3, 2013

In para #9, delete space after “Wholeness Chart 2-2.”

26-27

2

Oct 28, 2013

In eqs. (2-33) and (2-37) take out the /hbar in exponents to be consistent with ((2-35). That is, express these equations in natural units.

Luc Longtin

28

2

May 13, 2013

2^nd line up from bottom: Change “the thing that moves and evolves” to “what move and evolve”.

31

2

Oct 28, 2013

Wholeness Chart 2-5, RH column, second line of second block change [uv  vu] to uv  vu.

Luc Longtin

31

2

May 13, 2013

Remove period after margin note

35

2

Oct 23, 2013

In the 2^nd paragraph, after “… for  ”, insert: “Note that in general relativity, you will find the Minkowski metric, which is commonly designated by  in QFT, to be designated by the symbol . In relativity,  usually refers to any general metric, not necessarily of form shown in (2-57). But in this book, the symbol  always equals , the Minkowski metric.”

37

2

Sept 9, 2013

In Prob. 8, after “… delta”, insert “where  take on only values 1,2,3. In that case, it is better expressed as .”

37

2

May 13, 2013

Prob. 12, exponents, 0 should not be italic; t should be lower down, 3 places.

36 and

42

2 and 3

Sept 6, 2013

Aug 12, 2013

After Prob. 2-4, part b), and after (3-8), insert “The operation  is called the d’Alembertian operator, and is the 4D Minkowski coordinates analogue of the 3D Laplacian operator  of Cartesian coordinates.”

Thomas Fowler

45

3

May 13, 2013

Box 3-1. (B3-1.6) should be moved leftward a tad.

49

3

Sept 23, 2013

In (3-34), total deriv wrspt x^mu should be partial deriv

49

3

Aug 12, 2013

Last paragraph, after “Laplacian”, insert “symbol”.

52

3

Nov 11, 2013

At the end of eq. (3-45) insert “ = 0”.

Luc Longtin

60

3

Nov 11, 2013

Tile of Sect. 3.6.5:  Insert blank space before “as”

Luc Longtin

62

3

May 24, 2013

in (3-88), make exponents all same size font

64

3

May 24, 2013

above (3-101) insert space between “into” and “(3-100)”

73

3

Nov 11, 2013

In last line of (3-122) insert “(factor)” in 2^nd underbracket.

Luc Longtin

76

3

Nov 11, 2013

2^nd from last margin note, change “all” to “outer semicircle parts”. Also delete “except along real axis”.

Luc Longtin

82

3

May 24, 2013

Prob. 13. Delete extra space after “momenta,”

94

4

May 13, 2013

Box 4-1, (B4-1.5) should move left at tad.

96

4

May 13, 2013

Fig. 4-1. Lines around S in |S| are slanted. Change to vertical.

99

4

May 13, 2013

last line bold “)” should be unbold.

104

4

Sept 23, 2013

In (4-61), total deriv wrspt x^mu should be partial deriv

123

4

May 16, 2013

Eq. (4-157), last row has double equal sign, delete one

124

4

May 13, 2013

 γ-matrices should have space after γ. 3 places.

124

4

June 30, 2014

Sect 4.14, 2^nd paragraph, 1^st sentence: Change “pg. 95” to  pg. 96  

Sukruti Bansal

135

5

May 13, 2013

Maxwell’s equations in form presented actually due to Oliver Heaviside formulation (of Maxwell’s earlier form).

135 to 139

5

June 18, 2013

Margin notes with lower case symbol  for scalar potential should be changed to Φ

138

5

Nov 4, 2013

Eq. (5-20), the second F^31 should be F^13

Marius Paraschiv

142

5

Nov 5, 2013

(5-34) should have transpose symbol T on each row vector

Marius Paraschiv

144

5

Sept 23, 2013

In (5-42), total deriv wrspt x^mu should be partial deriv

156

5

May 13, 2013

WhCh 5-4, last row, r values, etc should be same size font for spin 1/2 and 1.

173

6

June 13, 2013

Just under Sect 6.5.3 heading, “Emily” should be “Emmy”

Holger Teutsch

184

7

Oct 23, 2013

In (7-7), total deriv wrspt x^mu should be partial deriv

198

7

Aug 27, 2013

Just after (7-60), change the two lines “where things work … with (7-76).” to the following

“where we note that K in front must equal unity, since, for t = t_i in$(7-60), S_oper = K, but to agree with$(7-56), S_oper must = I, the identity operator.”

203

7

Aug 15, 2013

Heading “Notation modification” needs upper case M.

207

7

Aug 22, 2013

Sect. 7.8.3, 2^nd paragraph, change “the Appendix” to “Appendix A”

210

7

Aug 22, 2013

Sect. 7.11, Change “Appendix” to “Appendix A”

221

8

May 13, 2013

Fig 8-2, all lines not same width. Same for other figs in other places.

222

8

May 13, 2013

Chap. 8, pg 222, eqs (8-31) and (8-33) can be moved leftward so numbers align with other eqs.

226

8

Oct 23, 2013

In (8-51) delete “=” sign at end of 1^st row and put period at end of last line of (8-52).

232

8

Dec 13, 2013

The bra after the second equal sign should have primes on the k and r subscripts for gamma.

Marius Paraschiv

233

8

May 14, 2013

2^nd margin note, “p” at end cut off on bottom

235

8

Oct 23, 2013

(8-89) should have double integration sign

243

8

Oct 23, 2013

In title of Sect. 8.10.1, delete “Approaching”

268

10

May 13, 2013

dash in header for Chapter 10  The Vacuum Revisited. (Probably white color dash in title)

268

10

May 13, 2013

2^nd line: “3-momenta” to 3-momentum 

271

10

Aug 9, 2013

Sect. 10.2.2, 3^rd line, change “and” to “and that prediction”

276

10

May 13, 2013

eq (10-15) can be moved left so number aligns with other eqs

277

10

May 13, 2013

Margin notes not aligned

291

11

May 13, 2013

Margin notes not aligned

293

11

May 13, 2013

Heading 11.5.1:  “on” should be  of .

294

11

Oct 23, 2013

3^rd line up from bottom. Exponent of e needs mu superscripted to x

295

11

May 13, 2013

Margin notes not aligned ( 2 places)

295

11

Aug 27, 2013

Near bottom, in 3), gamma should be larger font.

Holger Teutsch

300

11

May 13, 2013

Prob. 6. exponent in first row, mu needs to be raised.

304

12

May 13, 2013

“Toy Story” should be italicized.

328

13

Oct 23, 2013

Delete period before (13-32)

336

13

May 13, 2013

near bottom. Heading “WardWard identities” should have one less “Ward”.

356

14

May 13, 2013

Fig 14-7, 2^nd row of figure, photon loop has spaces where connects to photon

365

14

May 13, 2013

 symbol in margin notes, two places, make non italic.

369

14

May 13, 2013

pgs 369-371   Have (cont.) in top chart and (continued) in bottom.

373

14

May 13, 2013

delete space between problems 4 and 5.

376

15

Oct 30, 2013

3^rd line above (15-13), delete the sentence “The last line …chart.” In the next line, after “Note,” insert “for the last line in the chart,”. Delete the comma after “if” and insert a comma before “then”.

Holger Teutsch

387

15

May 13, 2013

Pgs. 387, 392, 393, 397  in margin note, make non italic.

392

15

Oct 30, 2013

In the line just above (15-102) after the = sign, delete “1/”.

Holger Teutsch

399

15

May 13, 2013

footnote should start new with “1” on each page, but this is “2”.

408

16

May 13, 2013

Margin notes not aligned

410

16

May 13, 2013

symbol  in margin note, make non italic.

419

16

Dec 13, 2013

(16-72) should have (2pi)^3 in denominator instead of (2pi)

422

16

Nov 12, 2013

After (16-83), change line “Taking mu = 0 in ….” to “Examining only the mu = 0 term in the summation of (16-83) with A^e_mu arbitrary, we have”

Holger Teutsch

423

16

May 13, 2013

margin μ exponent space from γ (2 places); also pg 424

442

17

May 20, 2013

Mid page, “wave- like”, delete space before “like”

444

17

May 13, 2013

Missing period at end of footnote.

448

17

June 3, 2013

Fig. 17-13 slanted lines for absolute values should be vertical lines

452

17

May 13, 2013

μ exponent space from γ  2/3 down on right side of page

464

17

May 13, 2013

delete period before (17-105) eq number

474

17

May 13, 2013

symbol  in margin note, make non italic.

479

17

Nov 11, 2013

Sect. 17.6.1, 3^rd line: Change “breaking” to “braking”.

Holger Teutsch

490

18

May 13, 2013

margin note, part of last line is cut off.

500

18

May 13, 2013

symbol  in margin note, make non italic.