Five Jet Production in E+e- Annihilation Above the W+W- Threshold PDF Download
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Author: N. Brown
Publisher:
ISBN:
Category : Annihilation reactions
Languages : en
Pages : 6
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Book Description
Author: N. Brown
Publisher:
ISBN:
Category : Annihilation reactions
Languages : en
Pages : 6
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Book Description
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 826
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Book Description
Author: N. K. Falck
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
![Jet production and fragmentation in e_1hn+e_1hn- [ee] annihilation at 12 - 43 GeV PDF](https://books.google.com/books/content/images/frontcover/uBfQXwAACAAJ?fife=w80-h100)
Author:
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Category :
Languages : de
Pages : 28
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Book Description
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 792
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Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
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Category :
Languages : en
Pages :
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Book Description
The energy dependence of the relative production rate of 3-jet events is studied in hadronic ee− annihilation events at centre of mass energies between 22 and 56 GeV, using the data of the JADE, MARK-II and AMY collaborations at PETRA, PEP and TRISTAN. Three jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(.cap alpha./sub s/2) perturbative QCD calculations, where the relative production rate of 3-jet events is roughly proportional to the strong coupling strength, .cap alpha./sub s/. The observed production rates of 3-jet events decreases significantly with increasing centre of mass energy. The results, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength, while the hypothesis of an energy independent coupling constant can be excluded with a significance of 5 standard deviations. Based on these results, the presented jet analysis also provides the possibility to detect first signs of the production of new and heavy particles in the early stage of data taking at SLC and LEP.
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Category :
Languages : en
Pages :
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Book Description
The properties of jets produced in ee− annihilation have been investigated using data taken with the Mark 1 detector at SPEAR. The momentum distributions parallel and perpendicular to the jet axis were measured for all charged tracks, for K°'s, and for rho°'s. The K° and rho° Pt2 distributions are well fit by the form dn/dPt2 = A exp( -B/sup +/ Pt2) with B = 4.6 +/- 0.2 for K°'s and 5 +/- 1 for rho°'s. The charged particle Pt2 distribution cannot be fit with a single exponential, but is similar to that of K°'s and rho°'s above Pt2 approx. 0.2 GeV2. The charged particle and K° parallel momentum distributions are similar in shape and approximately exponential. The production of rho°'s at low parallel momentum is suppressed. The average number of rho°'s per event is 0.4 +/- 0.1. 59 figures, 7 tables.
Author:
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 528
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Book Description
Author: Yuri Dokshitzer
Publisher: Atlantica Séguier Frontières
ISBN: 9782863321010
Category : Perturbation (Quantum dynamics).
Languages : en
Pages : 286
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Book Description
Author: Luciano Maiani
Publisher: World Scientific Publishing Company
ISBN: 9814733512
Category : Science
Languages : en
Pages : 483
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Book Description
The book gives a quite complete and up-to-date picture of the Standard Theory with an historical perspective, with a collection of articles written by some of the protagonists of present particle physics. The theoretical developments are described together with the most up-to-date experimental tests, including the discovery of the Higgs Boson and the measurement of its mass as well as the most precise measurements of the top mass, giving the reader a complete description of our present understanding of particle physics.
