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Measurement Of The Cp Asymmetry Parameter Sin 2 Beta At Cdf

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Measurement Of The Cp Asymmetry Parameter Sin 2 Beta At Cdf

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Author :
language : en
Publisher:
Release Date : 2000

Measurement Of The Cp Asymmetry Parameter Sin 2 Beta At Cdf written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

We present a measurement of the time-dependent asymmetry in the rate for [anti]B[sup 0][sub d] versus B[sup 0][sub d] decays to J/[psi] K[sup 0][sub S] . In the context of the Standard Model this is interpreted as a measurement of the CP-violation parameter sin(2[beta]). A total of 198 [+-] 17 B[sup 0][sub d]/[anti B][sup 0][sub d] decays were observed in p[anti p] collisions at ps = 1:8 TeV by the CDF detector at the Fermilab Tevatron. The initial b-flavor is determined by a same side avor tagging technique. Our analysis results in sin(2[beta]) = 1:8 [+-] 1:1(stat) [+-] 0:3(syst).

Particle Physics In The New Millennium

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Author : Josip Trampetic
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-05-21

Particle Physics In The New Millennium written by Josip Trampetic and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-05-21 with Science categories.

The traditional purpose of the Adriatic Meeting is to present most advanced scienti?c research conducted by the lecturers who take part in the development of their ?elds and, in addition, to provide a school-like atmosphere for young scientists. Dubrovnik, as a geographical centre of this region of Europe, provided a most adequate location for this conference. Having very agreeable surroundings, the conference site nevertheless gave a focus for very strong scienti?c interaction. The subjects chosen for the 8th meeting, in September 2001, were gauge theories, particle phenomenology, string theories and cosmology. We were able to bring together a very good cross section of outstanding scientists who gave extraorinarily good presentations. Certainely one reason for this success is that most of us feel obliged to help the scienti?c life in South East Europe return to its former level. However, there are very exciting new scienti?c developments as well. Part of the meeting was dominated by neutrino physics which has just seen exciting progress by establishing neutrino masses experimentally. This was d- cussed within neutrino masses and grand uni?ed theories (GUTs). General - pects of neutrino physics and CP violation, neutrino mixing and the bayron asymmetry were presented along the same lines. On the theoretical side the idea of the construction of gauge theories on non-commutative spaces and their phenomenological implications is accepted worldwide within the particle physics community.

Measurements Of The Cp Violation Parameter Sin 2 Beta In B Superscipt 0 Right Arrow J Psi K 0 Over S Decays

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Author :
language : en
Publisher:
Release Date : 1999

Measurements Of The Cp Violation Parameter Sin 2 Beta In B Superscipt 0 Right Arrow J Psi K 0 Over S Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

In the 110 pb−1 Run I data sample, using three complementary flavor-tagging algorithms CDF has made a new measurement of the CP-violating asymmetry sin(2[beta])=0.79{sup +0.41}{sub -0.44}, This corresponds to the limit sin(2[beta])>-0.08 at 95% confidence level. This result agrees well with predictions from indirect constraints based on fits of elements of the CKM matrix.

Measurement Of The Cp Violation Parameter Sin 2 Beta

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Author :
language : en
Publisher:
Release Date : 1999

Measurement Of The Cp Violation Parameter Sin 2 Beta written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

This thesis presents a measurement of the time-dependent asymmetry in the rate of {anti B}{sub d}° versus B{sub d}° decays to J/[psi]K{sub s}°. In the context of the Standard Model this is interpreted as a measurement of the CP violation parameter sin(2[beta]). A total of 198±17 B{sub d}°/{anti B}{sub d}° decays were observed in p{anti p} collisions at √s=1.8 TeV by the CDF detector at the Fermilab Tevatron. The initial B flavor (whether B° or {anti B}°) is determined by a same-side flavor tagging technique. The analysis results in sin(2[beta])=1.8±1.1(stat.)±0.3(syst.). This analysis demonstrates the feasibility of studying CP violation in the B°-{anti B}° system at a hadron collider. By applying the methods used in this analysis, future, higher-statistics experiments should be able to tightly constrain the parameters of the Standard Model.

Measurement Of The Cp Violation Parameter Sin 2 Beta In B Sup 0 R Arrow J Psi K Sub S Sup 0 Decays

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Author :
language : en
Publisher:
Release Date : 2001

Measurement Of The Cp Violation Parameter Sin 2 Beta In B Sup 0 R Arrow J Psi K Sub S Sup 0 Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

A sample of[approximately] 400 B[sub d][sup 0]/[bar B][sub d][sup 0][r-arrow] J/[psi]K[sub s][sup 0] decays collected in[bar p]p collisions by the CDF detector is used to directly measure the CP-violation parameter sin (2[beta]). They find sin(2[beta])= 0.79[sub[minus]0.44][sup+ 0.41], favoring the standard model expectation of a large CP violation in this B[sup 0] decay mode.

Measurement Of Sin2 Beta From J Psi K Sub S Decays

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Author :
language : en
Publisher:
Release Date : 2000

Measurement Of Sin2 Beta From J Psi K Sub S Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

The CP-violating parameter sin 2[beta] is directly measured using 110 pb−1 of data accumulated with the CDF detector at the Fermilab {anti p}p Tevatron collider operating at √s = 1.8 TeV. The signal consists of 395 ± 31 B{sub d}° {r{underscore}arrow} J/[psi] K{sub s} events. Three tagging methods are used to identify the type of B meson at production (B{sub d}° or {anti B}{sub d}°). From the CP asymmetry, sin 2[beta] is measured to be 0.79 {sub -0.44}{sup +0.41}, consistent with Standard Model predictions. Sin 2[beta] is in the interval 0 > sin2[beta] > 1 at the 93% confidence level.