Measurement Of The Textit Cp Violating Phase Boldsymbol Sin 2 Beta S Using Boldsymbol B 0 S Rightarrow J Psi Phi Decays At Cdf

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Measurement Of The Textit Cp Violating Phase Boldsymbol Sin 2 Beta S Using Boldsymbol B 0 S Rightarrow J Psi Phi Decays At Cdf

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Author :
language : en
Publisher:
Release Date : 2010

Measurement Of The Textit Cp Violating Phase Boldsymbol Sin 2 Beta S Using Boldsymbol B 0 S Rightarrow J Psi Phi Decays 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 2010 with categories.

A B{sub s}° meson can oscillate into its anti-particle, the {bar B}{sub s}° meson, before decaying. CP violation in this system is made possible by the presence of amplitudes from both mixed and unmixed B{sub s}° meson decays. The CP violating phase [beta]s appears in the interference between the decay amplitudes. The quantity sin(2[beta]s) is expected to be small in the standard model. Thus, measuring a large value for sin(2[beta]s) would be an unequivocal sign of new physics participation in the B{sub s}° mixing loop diagram. In this thesis, we present a latest measurement of sin(2[beta]s), using 5.2 fb−1 of data collected at CDF from p{bar p} collisions at a center of mass energy of √s = 1.96 TeV. A time-dependent angular analysis, with the production flavor of the B{sub s}° meson identified with flavor tagging methods, is used to extract sin(2[beta]s) from ≈6500 B{sub s}° → J/[psi][phi] decays. Other parameters of interest, such as the B{sub s}° lifetime and the decay width difference [Delta][Lambda] between the heavy and light B{sub s}° mass eigenstates are determined to high precision. Also, the effect of potential contributions to the final state from B{sub s}° → J/[psi]f0 and B{sub s}° → J/[psi]K+K− decays is considered for the first time. We present 68% and 95% confidence regions in the [beta]s - [Delta][Lambda] plane. The probability that the observed central value is a fluctuation of the data from the standard model expected value of [beta]s is calculated to be 44%. The observed confidence region shows better agreement with the standard model prediction than previous measurements.

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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language : en
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Release Date : 2000

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 2000 with categories.

In the 110 pb[sup -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 In B Sup 0 R Arrow J Psi K Sub S Sup 0 Decays

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language : en
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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 The Cp Violating Phase Phi S Using B 0 S J Psi Phi And B 0 S J Psi Pi Pi Decays With The Lhcb Experiment

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language : en
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Release Date : 2013

Measurement Of The Cp Violating Phase Phi S Using B 0 S J Psi Phi And B 0 S J Psi Pi Pi Decays With The Lhcb Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

Textit Cp Violation In B S 0 Rightarrow J Psi Phi At The Tevatron

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language : en
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Release Date : 2009

Textit Cp Violation In B S 0 Rightarrow J Psi Phi At The Tevatron written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

The author reviews the history and present status of CP violation measurements made during RunII of the Fermilab Tevatron. Both flavor-tagged and untagged measurements of the Cp-violating phase [beta]{sub s}{sup J/[Psi]} are discussed, as well as measurements of the width difference [Delta][Lambda]{sub s} between heavy and light B{sub s}° mass eigenstates made in the B{sub s}° → J/{Psi}[phi] system.

The Measurement Of Sin 2 Beta

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language : en
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Release Date : 2002

The Measurement Of 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 2002 with categories.

Since the first observation in 1964, CP violation remains one of the most elusive aspects of the standard model. The CDF collaboration has reported the first evidence of CP violation in the B system using the world's largest sample of B[yields] J/[psi]K[sub S][sup 0] decays. The direct measurement of sin(2[beta])=0.79[sub -0.44][sup+0.41] (combined statistical and systematic error) agrees with the standard model predictions. New data collected from the B-factories and from the upgraded experiments at the Tevatron should allow a more precise measurement of sin 2[beta] in the near future.

Measurement Of The Cp Violation Parameter Sin 2 Beta

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Author :
language : en
Publisher:
Release Date : 2002

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 2002 with categories.

This thesis presents a measurement of the time-dependent asymmetry in the rate of[anti B][sub d][sup 0] versus B[sub d][sup 0] decays to J/[psi]K[sub s][sup 0]. 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][sup 0]/[anti B][sub d][sup 0] decays were observed in p[anti p] collisions at[radical]s=1.8 TeV by the CDF detector at the Fermilab Tevatron. The initial B flavor (whether B[sup 0] or[anti B][sup 0]) 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[sup 0]-[anti B][sup 0] 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 Asymmetry Parameter Sin 2 Beta At Cdf

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language : en
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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).

Measurement Of The Cp Violation Parameter Sin 2 Beta In B 2 Psi K Sub S Decays

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language : en
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Release Date : 1999

Measurement Of The Cp Violation Parameter Sin 2 Beta In B 2 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 1999 with categories.

Prospects Of Measuring Cp Violation In B Decays At Cdf

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language : en
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Release Date : 2001

Prospects Of Measuring Cp Violation In B Decays 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 2001 with categories.

We summarize the prospects of measuring the CP asymmetry in B[sup 0][r-arrow] J/[psi]K[sup 0][sub s] and B[sup 0][r-arrow][pi][sup+][pi][sub -] with the CDF detector in Run II in 1999. We also explore the feasibility to determine sin 2[gamma] and discuss Run I results relevant to measurement of CP violation at CDF.