Measurement Of The Cp Violation Parameter Sin 2 Phi 1 In Beta 0 Delta Meson Decays

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Measurement Of The Cp Violation Parameter Sin 2 Phi 1 In Beta 0 Delta Meson Decays

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Author : A. Abashian
language : en
Publisher:
Release Date : 2001

Measurement Of The Cp Violation Parameter Sin 2 Phi 1 In Beta 0 Delta Meson Decays written by A. Abashian 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.

High Energy Physics Index

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Author :
language : en
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Release Date : 1989

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Nuclear physics categories.

Government Reports Announcements Index

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Author :
language : en
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Release Date : 1996-08

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-08 with Science categories.

Inis Atomindeks

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Author :
language : en
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Release Date : 1981

Inis Atomindeks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Nuclear energy categories.

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.

Science Citation Index

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language : en
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Release Date : 1995

Science Citation Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Science categories.

Vols. for 1964- have guides and journal lists.

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.

A Measurement Of The Cp Parameter Sine Two Beta Using Fully Reconstructed B To Ccbar Decays At The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2003

A Measurement Of The Cp Parameter Sine Two Beta Using Fully Reconstructed B To Ccbar Decays At The Babar 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 2003 with categories.

This dissertation presents a measurement of the time-dependent CP-violating asymmetries in the neutral B-meson system performed with data collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The data sample used consists of 29.7 fb[sup -1] collected at the[Upsilon](4S) resonance and 3.9 fb[sup -1] collected off-resonance. We analyze three samples of fully-reconstructed B-meson decays: a sample of decays to CP eigenstates in the modes J/[psi] K[sub s][sup 0], [psi](2S) K[sub s][sup 0], [chi][sub cl] K[sub s][sup 0], and J/[psi] K*[sup 0] (822 events); as well as both charged (14304 events) and neutral (10457 events) B decays to flavor-eigenstates including D[sup (*)] and[pi]/[rho]/[alpha][sub 1]. In all cases, the proper decay time difference between the reconstructed B-meson and the recoiling B-meson is determined by measuring the separation of the two decay vertices. Furthermore, the flavor of the recoiling B-meson is tagged using a neural network algorithm. We use the flavor-eigenstate samples to calibrate both the vertexing and tagging performance. We measure the amplitude of the CP asymmetry, sin2[beta]= 0.61[+-] 0.14(stat)[+-] 0.06(syst). These results indicate the existence of indirect CP violation in the B-meson system.

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 : 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 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 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 B0 s meson can oscillate into its anti-particle, the $ar{B}$0 s meson, before decaying. CP violation in this system is made possible by the presence of amplitudes from both mixed and unmixed B0 s meson decays. The CP violating phase ?s appears in the interference between the decay amplitudes. The quantity sin(2?s) is expected to be small in the standard model. Thus, measuring a large value for sin(2?s) would be an unequivocal sign of new physics participation in the B0 s mixing loop diagram. In this thesis, we present a latest measurement of sin(2?s), using 5.2 fb-1 of data collected at CDF from p$ar{p}$ collisions at a center of mass energy of √s=1.96 TeV. A time-dependent angular analysis, with the production flavor of the B0 s meson identified with flavor tagging methods, is used to extract sin(2?s) from 6̃500 B0 s→ J/?? decays. Other parameters of interest, such as the B0 s lifetime and the decay width difference between the heavy and light B0 s mass eigenstates are determined to high precision. Also, the effect of potential contributions to the final state from B0 s → J/?f0 and B0 s→ J/?K+K- decays is considered for the first time. We present 68% and 95% confidence regions in the ?s plane. The probability that the observed central value is a fluctuation of the data from the standard model expected value of ?s is calculated to be 44%. The observed confidence region shows better agreement with the standard model prediction than previous measurements.