Book contents
- Frontmatter
- Contents
- Preface
- Acknowledgements
- Notational conventions
- Note added in proof: the discovery of the top quark (?)
- Note added in proof: the demise of the SSC
- 18 Determination of the Kobayashi–Maskawa matrix
- 19 Mixing and CP violation
- 20 Regularization, renormalization and introduction to the renormalization group
- 21 Gauge theories, QCD and the renormalization group
- 22 Applications of the QCD renormalization group
- 23 The parton model in QCD
- 24 Large pT phenomena and jets in hadronic reactions
- 25 Jets and hadrons in e+e− physics
- 26 Low pT or ‘soft’ hadronic physics
- 27 Some non-perturbative aspects of gauge theories
- 28 Beyond the standard model
- Appendix 1 Elements of field theory
- Appendix 2 Feynman rules for QED, QCD and the SM
- Appendix 3 Conserved vector currents and their charges
- Appendix 4 Operator form of Feynman amplitudes and effective Hamiltonians
- Appendix 5 S-matrix, T-matrix and Feynman amplitude
- Appendix 6 Consequences of CPT invariance for matrix elements
- Appendix 7 Formulae for the basic partonic 2 → 2 processes
- Appendix 8 Euclidean space conventions
- References
- Analytic subject index for vols. 1 and 2
24 - Large pT phenomena and jets in hadronic reactions
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- Preface
- Acknowledgements
- Notational conventions
- Note added in proof: the discovery of the top quark (?)
- Note added in proof: the demise of the SSC
- 18 Determination of the Kobayashi–Maskawa matrix
- 19 Mixing and CP violation
- 20 Regularization, renormalization and introduction to the renormalization group
- 21 Gauge theories, QCD and the renormalization group
- 22 Applications of the QCD renormalization group
- 23 The parton model in QCD
- 24 Large pT phenomena and jets in hadronic reactions
- 25 Jets and hadrons in e+e− physics
- 26 Low pT or ‘soft’ hadronic physics
- 27 Some non-perturbative aspects of gauge theories
- 28 Beyond the standard model
- Appendix 1 Elements of field theory
- Appendix 2 Feynman rules for QED, QCD and the SM
- Appendix 3 Conserved vector currents and their charges
- Appendix 4 Operator form of Feynman amplitudes and effective Hamiltonians
- Appendix 5 S-matrix, T-matrix and Feynman amplitude
- Appendix 6 Consequences of CPT invariance for matrix elements
- Appendix 7 Formulae for the basic partonic 2 → 2 processes
- Appendix 8 Euclidean space conventions
- References
- Analytic subject index for vols. 1 and 2
Summary
Jets have by now become a major component of high energy particle physics. It is widely (if not universally) accepted that jets are implied by perturbative QCD and that they are the simplest and perhaps best evidence supporting it. This means that jets are to be found in all large pT phenomena irrespective of whether they are initiated by hadronic or by leptonic processes. In spite of this, for pedagogical and historical reasons we shall present the discussion of jets in hadronic and in e+e− reactions separately.
A drastic selection has had to be made to reduce the material on jets to an acceptable size. For additional material see Cavasinni (1990), Altarelli (1989) and Jacob (1990) and references therein. [See also the various contributions in the CERN 89-08 (vol 1–3) edited by Altarelli, Kleiss and Verzegnassi, 1989].
Note that a complete set of formulae for the cross-sections of all the 2 → 2 partonic reactions discussed herein can be found in Appendix 7.
Introduction
We here discuss the evidence that hadronic reactions involving large transfers of transverse momentum (pT) are controlled by the direct collision of constituents within the colliding hadrons, with subsequent fragmentation of these constituents into showers of hadrons. Naturally, it is supposed that these constituents are the quarks and gluons discussed in previous chapters.
It is well known that high energy hadronic interactions are dominated by the production of a large number of particles, mostly confined to the nearly forward direction, i.e. dominated by events in which the produced secondaries have small PT leading to the conclusion that strong interactions at high energy are generally rather ‘soft’.
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- Information
- An Introduction to Gauge Theories and Modern Particle Physics , pp. 219 - 252Publisher: Cambridge University PressPrint publication year: 1996