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Measurement of the CP-violating Phase Φs in the Decay Bo/s →J/ψ/φ

Measurement of the CP-violating Phase Φs in the Decay Bo/s →J/ψ/φ PDF Author: Conor Thomas Fitzpatrick
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Languages : en
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Measurement of the CP-violating Phase Φs in the Decay Bo/s →J/ψ/φ

Measurement of the CP-violating Phase Φs in the Decay Bo/s →J/ψ/φ PDF Author: Conor Thomas Fitzpatrick
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Languages : en
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Measurement of the CP Violating Phase Beta_s in B_s-]J/psi Phi Decays

Measurement of the CP Violating Phase Beta_s in B_s-]J/psi Phi Decays PDF Author:
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ISBN:
Category :
Languages : en
Pages : 201

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The CP violating phase [beta] j/[Psi][Phi]s is measured in decays of B0s → J/[Psi][Phi]. This measurement uses 5.2 fb-1 of data collected in √s = 1.96 TeV p$\bar{p}$ collisions at the Fermilab Tevatron with the CDF Run-II detector. CP violation in the Bs0-$\bar{B}$s0 system is predicted to be very small in the Standard Model. However, several theories beyond the Standard Model allow enhancements to this quantity by heavier, New Physics particles entering second order weak mixing box diagrams. Previous measurements have hinted at a deviation from the Standard Model expectation value for [beta]sJ/[Psi][Phi] with a significance of approximately 2[sigma]. The measurement described in this thesis uses the highest statistics sample available to date in the Bs0 → J/[Psi][Phi] decay channel, where J/[Psi] → [mu]+[mu]- and [Phi] → K+K-. Furthermore, it contains several improvements over previous analyses, such as enhanced signal selection, fully calibrated particle ID and flavour tagging, and the inclusion of an additional decay component in the likelihood function. The added decay component considers S-wave states of KK pairs in the Bs0 → J/[Psi] K+K- channel. The results are presented as 2-dimensional frequentist confidence regions for [beta]sJ/[Psi][Phi] and [Delta][Gamma] (the width difference between the Bs0 mass eigenstates), and as a confidence interval for [beta]sJ/[Psi][Phi] of [0.02,0.52] U [1.08, 1.55] at the 68% confidence level. The measurement of the CP violating phase obtained in this thesis is complemented by the world's most precise measurement of the lifetime [tau]s = 1.53 ± 0.025 (stat.) ± 0.012 (syst.) ps and decay width difference [Delta][Gamma] = 0.075 ± 0.035 (stat.) ± 0.01 (syst.) ps-1 of the Bs0 meson, with the assumption of no CP violation.

Measurement of the CP Violating Phase ?s in B0s J/?? Decays

Measurement of the CP Violating Phase ?s in B0s J/?? Decays PDF Author:
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ISBN:
Category :
Languages : en
Pages : 201

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The CP violating phase ? j/??s is measured in decays of B0s → J/??. This measurement uses 5.2 fb-1 of data collected in √s = 1.96 TeV p$ar{p}$ collisions at the Fermilab Tevatron with the CDF Run-II detector. CP violation in the Bs0-$ar{B}$s0 system is predicted to be very small in the Standard Model. However, several theories beyond the Standard Model allow enhancements to this quantity by heavier, New Physics particles entering second order weak mixing box diagrams. Previous measurements have hinted at a deviation from the Standard Model expectation value for ?sJ/?? with a significance of approximately 2?. The measurement described in this thesis uses the highest statistics sample available to date in the Bs0 → J/?? decay channel, where J/? → ?+?- and ? → K+K-. Furthermore, it contains several improvements over previous analyses, such as enhanced signal selection, fully calibrated particle ID and flavour tagging, and the inclusion of an additional decay component in the likelihood function. The added decay component considers S-wave states of KK pairs in the Bs0 → J/? K+K- channel. The results are presented as 2-dimensional frequentist confidence regions for ?sJ/?? and ?? (the width difference between the Bs0 mass eigenstates), and as a confidence interval for ?sJ/?? of [0.02,0.52] U [1.08, 1.55] at the 68% confidence level. The measurement of the CP violating phase obtained in this thesis is complemented by the world's most precise measurement of the lifetime ?s = 1.53 ± 0.025 (stat.) ± 0.012 (syst.) ps and decay width difference ?? = 0.075 ± 0.035 (stat.) ± 0.01 (syst.) ps-1 of the Bs0 meson, with the assumption of no CP violation.

Measurement of the CP Violating Phase Φs [phi S] and the Decay Width Difference ΔΓs [delta-gamma S] in the Decay BOs → J/ΨΦ [J, Psi-phi] with the ATLAS Experiment

Measurement of the CP Violating Phase Φs [phi S] and the Decay Width Difference ΔΓs [delta-gamma S] in the Decay BOs → J/ΨΦ [J, Psi-phi] with the ATLAS Experiment PDF Author: Claudio Heller
Publisher:
ISBN:
Category :
Languages : en
Pages : 178

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Measurement of the CP Violating Phase _F63_1tns [phi S] and the Decay Width Difference _D63_G63_1tns [delta-gamma S] in the Decay B_1hnO_1tns → J/_Y63_F63 [J, Psi-phi] with the ATLAS Experiment

Measurement of the CP Violating Phase _F63_1tns [phi S] and the Decay Width Difference _D63_G63_1tns [delta-gamma S] in the Decay B_1hnO_1tns → J/_Y63_F63 [J, Psi-phi] with the ATLAS Experiment PDF Author: Claudio Heller
Publisher:
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Category :
Languages : en
Pages : 178

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Measurement of CP Violation in $B_s^0\to J/\psi \phi$ Decays Using the Full CDF Data Set

Measurement of CP Violation in $B_s^0\to J/\psi \phi$ Decays Using the Full CDF Data Set PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 135

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We report on the final measurement of the CP-violating $B_s^0$ mixing phase $\beta_s^{J/[psi][phi]}$ in √s = 1.96 TeV proton-antiproton collisions collected with the Collider Detector at the Fermilab Tevatron collider. Using a sample corresponding to 9.6 fb-1 of integrated luminosity, we fit the decay-time evolution of $B_s^0$ → J/[psi] (→ [mu]+ [mu]-) [phi] (→ K+ K−) decays in which the b-quark content at production and the CP parity of the final state are identified. The interference of decays with and without mixing renders the $B_s^0$ mixing phase observable. The phase is determined to be -0.06

Measurement of the CP Violating Phase $\boldsymbol{\sin(2\beta_{s})}$ Using $\boldsymbol{B{̂0}_{s}\rightarrow J/\psi\phi}$ Decays at CDF.

Measurement of the CP Violating Phase $\boldsymbol{\sin(2\beta_{s})}$ Using $\boldsymbol{B{̂0}_{s}\rightarrow J/\psi\phi}$ Decays at CDF. PDF Author:
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ISBN:
Category :
Languages : en
Pages : 177

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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.

Measurement of CP Violation in Bo - J/[psi] KL Decays

Measurement of CP Violation in Bo - J/[psi] KL Decays PDF Author: Sven Einar Vahsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 412

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Flavor Physics at the Tevatron

Flavor Physics at the Tevatron PDF Author: Thomas Kuhr
Publisher: Springer
ISBN: 3642103006
Category : Science
Languages : en
Pages : 164

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Book Description
The book reviews the latest experimental results of charm and bottom flavor physics at the Tevatron proton-antiproton collider. The measurements of lifetimes, branching ratios and mixing properties of heavy flavored hadrons provide important constraints on fundamental parameters of the standard model – the elements of the CKM matrix. Comparisons of experimental results with theoretical predictions allow to search for physics beyond the standard model or to set bounds on parameters of new physics models. The experimental techniques developed at the Tevatron are highly relevant for the next generation flavor physics experiments at the LHC. This book provides the reader a detailed summary of the status of heavy flavor physics at the end of the Tevatron data taking period and the start of the LHC program.

Measurement of the CP Violating Phase PhiS and the Decay Width Difference DeltaGammaS in the Decay B0s->J/psi Phi with the ATLAS Experiment

Measurement of the CP Violating Phase PhiS and the Decay Width Difference DeltaGammaS in the Decay B0s->J/psi Phi with the ATLAS Experiment PDF Author: Claudio Heller
Publisher:
ISBN:
Category :
Languages : en
Pages : 178

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Book Description