Fr. 70.00

Measurement of the Top Quark Mass in the Dilepton Final State Using the Matrix Element Method

English · Paperback / Softback

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Description

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The main pacemakers of scienti?c research are curiosity, ingenuity, and a pinch of persistence. Equipped with these characteristics a young researcher will be s- cessful in pushing scienti?c discoveries. And there is still a lot to discover and to understand. In the course of understanding the origin and structure of matter it is now known that all matter is made up of six types of quarks. Each of these carry a different mass. But neither are the particular mass values understood nor is it known why elementary particles carry mass at all. One could perhaps accept some small generic mass value for every quark, but nature has decided differently. Two quarks are extremely light, three more have a somewhat typical mass value, but one quark is extremely massive. It is the top quark, the heaviest quark and even the heaviest elementary particle that we know, carrying a mass as large as the mass of three iron nuclei. Even though there exists no explanation of why different particle types carry certain masses, the internal consistency of the currently best theory-the standard model of particle physics-yields a relation between the masses of the top quark, the so-called W boson, and the yet unobserved Higgs particle. Therefore, when one assumes validity of the model, it is even possible to take precise measurements of the top quark mass to predict the mass of the Higgs (and potentially other yet unobserved) particles.

List of contents

Experimental Environment.- Event Reconstruction and Simulation.- The Top Quark and the Concept of Mass.- The Matrix Element Method.- Measurement of the Top Quark Mass.- Improved Mass Measurement.- Conclusion.

Summary

The main pacemakers of scienti?c research are curiosity, ingenuity, and a pinch of persistence. Equipped with these characteristics a young researcher will be s- cessful in pushing scienti?c discoveries. And there is still a lot to discover and to understand. In the course of understanding the origin and structure of matter it is now known that all matter is made up of six types of quarks. Each of these carry a different mass. But neither are the particular mass values understood nor is it known why elementary particles carry mass at all. One could perhaps accept some small generic mass value for every quark, but nature has decided differently. Two quarks are extremely light, three more have a somewhat typical mass value, but one quark is extremely massive. It is the top quark, the heaviest quark and even the heaviest elementary particle that we know, carrying a mass as large as the mass of three iron nuclei. Even though there exists no explanation of why different particle types carry certain masses, the internal consistency of the currently best theory—the standard model of particle physics—yields a relation between the masses of the top quark, the so-called W boson, and the yet unobserved Higgs particle. Therefore, when one assumes validity of the model, it is even possible to take precise measurements of the top quark mass to predict the mass of the Higgs (and potentially other yet unobserved) particles.

Product details

Authors Alexander Grohsjean
Publisher Springer, Berlin
 
Languages English
Product format Paperback / Softback
Released 04.10.2012
 
EAN 9783642265013
ISBN 978-3-642-26501-3
No. of pages 150
Dimensions 185 mm x 237 mm x 10 mm
Weight 254 g
Illustrations X, 150 p. 73 illus., 25 illus. in color.
Series Springer Theses
Springer Theses
Subjects Natural sciences, medicine, IT, technology > Physics, astronomy > Atomic physics, nuclear physics

B, Physics and Astronomy, Accelerator Physics, Particle acceleration, Particle Acceleration and Detection, Beam Physics, Top Quark, d0 Experiment

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