The Investigation of CP Violation Through the Decay of Polarized Tau Leptons II. PDF Download
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Languages : en
Pages : 14
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Under the assumption that CP violation is caused by exchange of anew boson, the authors propose to measure the magnitudes and CP-violating phases of the coupling constants of this boson to five different vertices in tau decay. This can be accomplished by studying the decay of polarized tau leptons produced at an ee− collider whose beams are polarized. These five coupling constants could be used to construct a future theory of CP violation. If CP is violated in any channel of tau decay, it will imply that there exists a new charged boson other than the W boson responsible for CP violation. It will also imply that CP violation is much more prevalent than the standard theory predicts and this may enable one to understand the preponderance of matter over antimatter in the present universe.
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Languages : en
Pages : 14
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Book Description
Under the assumption that CP violation is caused by exchange of anew boson, the authors propose to measure the magnitudes and CP-violating phases of the coupling constants of this boson to five different vertices in tau decay. This can be accomplished by studying the decay of polarized tau leptons produced at an ee− collider whose beams are polarized. These five coupling constants could be used to construct a future theory of CP violation. If CP is violated in any channel of tau decay, it will imply that there exists a new charged boson other than the W boson responsible for CP violation. It will also imply that CP violation is much more prevalent than the standard theory predicts and this may enable one to understand the preponderance of matter over antimatter in the present universe.
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Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 18
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If CP is violated in any decay process involving leptons it will signify the existence of a new force (called the X boson) responsible for CP violation that may be the key to understanding matter-antimatter asymmetry in the universe. The author discusses the signatures of CP violation in (1) the decay of tau lepton, and (2) the semileptonic decay of [pi], K, D, B and t particles by measuring the polarization of the charged lepton in the decay. The author discusses how the coupling constants and their phases of the coupling of the X boson to 9 quark vertices and 3 lepton vertices can be obtained through 12 decay processes.
![Test of T and CP Violation in Leptonic Decay of [tau]{sup {plus_minus}} PDF](https://books.google.com/books/content/images/frontcover/zvBaAQAACAAJ?fife=w80-h100)
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Category :
Languages : en
Pages : 8
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![CP Violation in [tau] 2![nu]{sub {tau}} + 3[pi]. PDF](https://books.google.com/books/content/images/frontcover/7BGnnQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 13
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In the Standard Model no CP violation can occur in decay processes involving leptons either as a parent or a daughter because these processes involve one W exchange and thus, even if the CP violating complex coupling exists in these decays, its effect will not show up when the amplitude is squared. The author needs two diagrams to interfere with each other to see the CP violating effects. Here, he discusses ways to find CP violation in the decay of [tau]{sup {+-}} → [nu]{sub [tau]} + 3[pi] from unpolarized as well as polarized {tau}{sup {+-}}.
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Languages : en
Pages : 19
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If CP is violated in any decay process involving leptons it will signify the existence of a new scalar boson (called the X boson) responsible for CP violation that may be the key to understanding matter-antimatter asymmetry in the universe. The authors discuss the signatures of CP violation in (1) the decay of tau and mu leptons, and (2) the semileptonic decay of [pi], K, D, B and t particles by measuring the polarization of the charged lepton in the decay. The authors discuss how the coupling constants and their phases of the coupling of the X boson to 9 quark vertices and 3 lepton vertices can be obtained through 12 decay processes.
Author: Jong-ping Hsu
Publisher: World Scientific
ISBN: 9814546194
Category :
Languages : en
Pages : 426
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Dr W Kroll, a young post-doc working under Heisenberg at Leipzing in the 1930s, was forced to escape from the Nazis and eventually came to the National Taiwan University in 1941. He taught many of the advanced courses in theoretical physics for over two decades, and prepared a generation of physicists in Taiwan. A symposium on pure and applied physics was held in memory of Prof Kroll at the University of Massachusetts Dartmouth in August 1996. These proceedings, composed of papers contributed to the symposium by many of Prof Kroll's former students now reaching professorial ranks in the West, reflect in a small measure the legacy he left behind.
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Languages : en
Pages : 8
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We discuss the test of CP and CPT violation in Tau decay without using the polarized electron beam by comparing partial fractions of tau( - ) and tau(+) decay into channels with strong final state interactions. For example, gamma(tau( - ) right arrow pi( - ) + pi(0) + nu) not equal gamma(tau(+) right arrow pi(+) + pi(0) + nu) signifies violation of CP. The optimum energy to investigate CP violation in tau decay is discussed. We conclude that this energy is a few MeV below psi(2s) in order to avoid the charm contribution and over abundance of hadrons at the psi(2s) peak.
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Languages : en
Pages : 11
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This paper reviews the following topics: tests for CP violation in top-quark production and decay processes. In particular, m{sub t} = 174 ± 17 GeV implies good top-quark polarimetry because the W bosons in t-quark decays must be predominantly longitudinally polarized (?{sub L}/?{sub T} = 2.4). Tests for CP violation in tau lepton decays by the? →?? decay mode by usage of? polarimetry signatures. Tests for complete measurement of the Z°,?* →?−? vertex, including tests for CP violation in tau production processes.
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Category :
Languages : en
Pages : 6
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Book Description
This paper reviews the following topics: Tests for CP violation in top-quark production and decay processes. In particular, m{sub t} = 174 ± 17GeV implies good top-quark polarimetry because the W bosons in t-quark decays must be predominantly longitudinally polarized (?{sub L}/?{sub T} = 2.4). Tests for CP violation in tau lepton decays by the? →?? decay mode by usage of? polarimetry signatures. Tests for complete measurement of the Z{sup o},?* →?−? vertex, including tests for CP violation in tau production processes.
