Table Of ContentDYNAMICS OF THE STANDARD MODEL
Describing the fundamental theory of particle physics and its applications, this
book provides a detailed account of the Standard Model, focusing on techniques
thatcanproduceinformationaboutrealobservedphenomena.
The book begins with a pedagogic account of the Standard Model, introducing
essentialtechniquessuchaseffectivefieldtheoryandpath-integralmethods.Itthen
focusesontheuseoftheStandardModelinthecalculationofphysicalproperties
of particles. Rigorous methods are emphasized, but other useful models are also
described.
This second edition has been updated to include recent theoretical and exper-
imental advances, such as the discovery of the Higgs boson. A new chapter is
devotedtothetheoreticalandexperimentalunderstandingofneutrinos,andmajor
advancesinCPviolationandelectroweakphysicshavebeengivenamoderntreat-
ment.Thisbookisvaluabletograduatestudentsandresearchersinparticlephysics,
nuclearphysicsandrelatedfields. This title, first published in 2014, has
been reissued as an Open Access publication on Cambridge Core.
John F. DonoghueisDistinguishedProfessorintheDepartmentofPhysics,
University of Massachusetts. His research spans particle physics, quantum field
theoryandgeneralrelativity.HeisaFellowoftheAmericanPhysicalSociety.
Eugene Golowich is Emeritus Professor in the Department of Physics,
UniversityofMassachusetts.Hisresearchhasfocusedonparticletheoryandphe-
nomenology.HeisaFellowoftheAmericanPhysicalSocietyandisarecipientof
theCollegeOutstandingTeacherawardfromtheUniversityofMassachusetts.
Barry R. Holstein is Emeritus Professor in the Department of Physics,
University of Massachusetts. His research is in the overlap area of particle and
nuclear theory. A Fellow of the American Physical Society, he is also the editor
of Annual Reviews of Nuclear and Particle Science and is a longtime consulting
editoroftheAmericanJournalofPhysics.
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CAMBRIDGEMONOGRAPHSONPARTICLEPHYSICS,NUCLEAR
PHYSICSANDCOSMOLOGY
GeneralEditors:T.Ericson,P.V.Landshoff
Availabletitlesinthisseries:
3.E.LeaderandE.Predazzi:AnIntroductiontoGaugeTheoriesandModernParticlePhysics,
Volume1:ElectroweakInteractions,the‘NewParticles’andthePartonModel
4.E.LeaderandE.Predazzi:AnIntroductiontoGaugeTheoriesandModernParticlePhysics,
Volume2:CP-Violation,QCDandHardProcesses
6.H.GrosseandA.Martin:ParticlePhysicsandtheSchrödingerEquation
7.B.Andersson:TheLundModel
8.R.K.Ellis,W.J.StirlingandB.R.Webber:QCDandColliderPhysics
10.A.V.ManoharandM.B.Wise:HeavyQuarkPhysics
11.R.Frühwirth,M.Regler,R.K.Bock,H.GroteandD.Notz:DataAnalysisTechniquesfor
High-EnergyPhysics,Secondedition
12.D.Green:ThePhysicsofParticleDetectors
13.V.N.GribovandJ.Nyiri:QuantumElectrodynamics
14.K.Winter(ed.):NeutrinoPhysics,Secondedition
15.E.Leader:SpininParticlePhysics
16.J.D.Walecka:ElectronScatteringforNuclearandNucleonStructure
17.S.Narison:QCDasaTheoryofHadrons
18.J.F.LetessierandJ.Rafelski:HadronsandQuark-GluonPlasma
19.ADonnachie,H.G.Dosch,P.V.LandshoffandO.Nachtmann:PomeronPhysicsandQCD
20.A.Hofmann:ThePhysicsofSynchrotronRadiation
21.J.B.KogutandM.A.Stephanov:ThePhasesofQuantumChromodynamics
22.D.Green:HighPT PhysicsatHadronColliders
23.K.Yagi,T.HatsudaandY.Miake:Quark-GluonPlasma
24.D.M.BrinkandR.A.Broglia:NuclearSuperfluidity
25.F.E.Close,A.DonnachieandG.Shaw:ElectromagneticInteractionsandHadronicStructure
26.C.GrupenandB.A.Schwartz:ParticleDetectors,Secondedition
27.V.Gribov:StrongInteractionsofHadronsatHighEnergies
28.I.I.BigiandA.I.Sanda:CPViolation,Secondedition
29.P.JaranowskiandA.Królak:AnalysisofGravitational-WaveData
30.B.L.Ioffe,V.S.FadinandL.N.Lipatov:QuantumChromodynamics:Perturbativeand
NonperturbativeAspects
31.J.M.Cornwall,J.PapavassiliouandD.Binosi:ThePinchTechniqueanditsApplicationsto
Non-AbelianGaugeTheories
32.J.Collins:FoundationsofPerturbativeQCD
33.Y.V.KovchegovandE.Levin:QuantumChromodynamicsatHighEnergy
34.J.RakandM.J.Tannenbaum:High-pT PhysicsintheHeavyIonEra
35.J.F.Donoghue,E.GolowichandB.R.Holstein:DynamicsoftheStandardModel,
Secondedition
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DYNAMICS OF THE STANDARD
MODEL
second edition
JOHN F. DONOGHUE
University ofMassachusetts
EUGENE GOLOWICH
University ofMassachusetts
BARRY R. HOLSTEIN
University ofMassachusetts
Published online by Cambridge University Press
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DOI: 10.1017/9781009291033
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Contents
Prefacetothesecondedition pagexvii
I InputstotheStandardModel 1
I–1 Quarksandleptons 1
Quarks 2
Leptons 3
Quarkandleptonnumbers 5
I–2 Chiralfermions 5
Themasslesslimit 5
Parity,timereversal,andchargeconjugation 7
I–3 Fermionmass 9
Diracmass 9
Majoranamass 9
I–4 Symmetriesandnearsymmetries 11
Noethercurrents 12
ExamplesofNoethercurrents 13
Approximatesymmetry 16
I–5 Gaugesymmetry 17
Abeliancase 18
Nonabeliancase 19
Mixedcase 21
I–6 Onthefateofsymmetries 22
Hiddensymmetry 23
Spontaneoussymmetrybreakinginthesigmamodel 24
II InteractionsoftheStandardModel 28
II–1 QuantumElectrodynamics 28
U(1)gaugesymmetry 28
QEDtooneloop 31
vii
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viii Contents
On-shellrenormalizationoftheelectriccharge 35
Electricchargeasarunningcouplingconstant 37
II–2 QuantumChromodynamics 40
SU(3)gaugesymmetry 40
QCDtooneloop 45
Asymptoticfreedomandrenormalizationgroup 51
II–3 Electroweakinteractions 57
Weakisospinandweakhyperchargeassignments 57
SU(2) ×U(1) gauge-invariantlagrangian 60
L Y
Spontaneoussymmetrybreaking 62
Electroweakcurrents 63
II–4 Fermionmixing 66
Diagonalizationofmassmatrices 66
Quarkmixing 68
Neutrinomixing 70
QuarkCPviolationandrephasinginvariants 72
III Symmetriesandanomalies 76
III–1 SymmetriesoftheStandardModel 76
III–2 Pathintegralsandsymmetries 79
Thegeneratingfunctional 80
Noether’stheoremandpathintegrals 81
III–3 TheU(1)axialanomaly 82
Diagrammaticanalysis 84
Path-integralanalysis 88
III–4 Classicalscaleinvarianceandthetraceanomaly 95
III–5 Chiralanomaliesandvacuumstructure 98
Theθ vacuum 99
Theθ term 101
Connectionwithchiralrotations 102
III–6 Baryon-andlepton-numberviolationintheStandardModel 103
IV Introductiontoeffectivefieldtheory 106
IV–1 Effectivelagrangiansandthesigmamodel 106
Representationsofthesigmamodel 107
Representationindependence 109
IV–2 Integratingoutheavyfields 111
Thedecouplingtheorem 111
Integratingoutheavyfieldsattreelevel 112
Matchingthesigmamodelattreelevel 114
IV–3 Loopsandrenormalization 115
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Contents ix
IV–4 Generalfeaturesofeffectivefieldtheory 119
Effectivelagrangiansandsymmetries 120
Powercountingandloops 121
Weinberg’spower-countingtheorem 122
Thelimitsofaneffectivefieldtheory 123
IV–5 Symmetrybreaking 124
IV–6 Matrixelementsofcurrents 126
Matrixelementsandtheeffectiveaction 127
IV–7 Effectivefieldtheoryofregionsofasinglefield 129
IV–8 EffectivelagrangiansinQED 136
IV–9 EffectivelagrangiansasprobesofNewPhysics 138
V Chargedleptons 144
V–1 Theelectron 144
Breit–Fermiinteraction 144
QEDcorrections 148
PrecisiontestsofQED 151
Theinfraredproblem 153
V–2 Themuon 155
Muondecayattreelevel 155
PrecisedeterminationofG 157
μ
Leading-orderphotoniccorrection 159
V–3 Theτ lepton 163
Exclusiveleptonicdecays 164
Exclusivesemileptonicdecays 164
Inclusivesemileptonicdecays 167
Someapplicationsofτ decays 168
VI Neutrinos 173
VI–1 Neutrinomass 173
EquivalenceofheavyMajoranamasstoadimension-five
operator 175
VI–2 Leptonmixing 176
VI–3 Theoryofneutrinooscillations 179
Oscillationsinvacuum 179
Oscillationsinmatter:MSWeffect 181
CPviolation 184
VI–4 Neutrinophenomenology 185
Solarandreactorneutrinos:θ and(cid:4)m2 185
12 21
Atmosphericandacceleratorneutrinos:θ and|(cid:4)m2 | 190
23 32
Short-baselinestudies:θ 191
13
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