Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A Preliminary Measurement of the Average B Hadron Lifetime
Author: A Preliminary, Precise Measurement of the Average B Hadron Lifetime
Author: Measurement of the Average Lifeetime of B Hadrons at SLD.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
The authors present preliminary measurements of the average B hadron lifetime using a sample of 50,000 Z° events collected by SLD at the SLC in 1993. Their first technique uses the impact parameter of tracks in jets opposite tagged b jets. They obtain [tau]{sub B}([delta]) = 1.617 ± 0.048 ± 0.086 ps, and [tau]{sub B}([Sigma][delta]) = 1.627 ± 0.054 ± 0.132 ps from single and summed impact parameter distributions. The second technique uses inclusive vertices reconstructed in three dimensions. From the decay length distribution, they extract [tau]{sub B} = 1.577 ± 0.032 ± 0.046 ps.
Scientific and Technical Aerospace Reports
Author: B Physics And Cp Violation: Proceedings Of The 2nd International Conference
Author: Thomas E BrowderPublisher: World Scientific
ISBN: 9814602760
Category :
Languages : en
Pages : 528
Book Description
CP violation is one of the most subtle effects in the Standard Model of particle physics and may be the first clue to the physics that lies beyond. Charge conjugation, C, and parity, P, are symmetries of particle interactions. C corresponds to the operation of replacing a particle by its antiparticle, while P is the operation of mirror reflection. Before 1956, it was believed that these were also symmetries of the interactions of elementary particles. In 1956, C S Wu found evidence for P violation in the weak interaction. Theorists proposed that the combination of CP would be a symmetry of the weak interaction. In 1964, Christenson, Cronin, Fitch and Turlay found the first evidence for the violation of CP symmetry in the decays of kaons.Although Kobayashi and Maskawa then showed how the Standard Model can accommodate the observed CP violation, Wolfenstein pointed out that it is also possible that there is a new interaction in addition to the usual four, called the superweak interaction, which is responsible for the asymmetry. To test this idea, the observation of a different type of asymmetry, called direct CP violation, is required; in the kaon sector, very precise measurements of the ratio of kaon decay rates are necessary. In B decay modes where a second order weak process whimisically named “penguin” interferes with another suppressed, first order “tree” amplitude, it may also be possible to observe these direct CP-violating effects.B physics and CP violation is now one of the major growth areas in high energy physics. Nearly every major high energy physics laboratory now has a project underway to observe the large CP asymmetries expected in the B sector and to test the consistency of the Standard Model. The unitarity of the Kobayashi-Maskawa mixing matrix in the Standard Model implies the existence of three phases, called alpha, beta and gamma, which can be determined by the measurements of CP asymmetries in B decays. About 200 participants gathered in Hawaii in March 1997 to discuss the progress in the field, and this important book constitutes the proceedings of that conference.
Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes)
Author: Zygmunt AjdukPublisher: World Scientific
ISBN: 9814547107
Category :
Languages : en
Pages : 1878
Book Description
The 28th conference from the Rochester series was the major high energy physics conference in 1996. Volume one contains short reports on new theoretical and experimental results. Volume two consists of the review talks presented in the plenary sessions.
International Europhysics Conference on High Energy Physics
Author: Daniel LellouchPublisher: Springer Science & Business Media
ISBN: 3642599826
Category : Science
Languages : en
Pages : 1293
Book Description
The 1997 International Europhysics Conference on High Energy Physics was held at the campus of the Hebrew University of Jerusalem and at the Jerusalem Renaissance Hotel, from August 19th to August 25th, 1997. This was the first time that the European Physical Society had its High Energy Physics Conference outside the boundary of Europe. A total of 550 physicists participated in the conference with a total of 250 presentations in the parallel sessions and 26 presentations in the plenary sessions. The Board of the of the High Energy and Particle Physics division (HEPP) of the EPS acted as the Scientific Organizing Committee. The Board acknowl edges the help of the International Advisory Committee as well as that of the Local Organizing Committee. The conference was co-organized by the Hebrew University of Jerusalem and by the Weizmann Institute of Science, with important help by physi cists from the Israeli Institute of Technology (Technion) and the Tel Aviv University.
Physicss in Collision 15
Author: Krzysztof RybickiPublisher: World Scientific
ISBN: 9814531383
Category : Nuclear reactions
Languages : en
Pages : 539
Book Description
Progress in Electroweak Interactions
Author: J. Thanh Van TranPublisher: Atlantica Séguier Frontières
ISBN: 9782863320426
Category : Electroweak interactions
Languages : en
Pages : 666
Book Description
Eps: High Energy Physics '95: Proceedings Of The International Europhysics Conference
Author: Catherine Vander VeldePublisher: World Scientific
ISBN: 9814547700
Category :
Languages : en
Pages : 1042
Book Description