Measurement Of The Cp Violating Phase S Phi S And The Decay Width Difference S Delta Gamma S In The Decay Bos J J Psi Phi With The Atlas Experiment

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Measurement Of The Cp Violating Phase S Phi S And The Decay Width Difference S Delta Gamma S In The Decay Bos J J Psi Phi With The Atlas Experiment

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Author : Claudio Heller
language : en
Publisher:
Release Date : 2013

Measurement Of The Cp Violating Phase S Phi S And The Decay Width Difference S Delta Gamma S In The Decay Bos J J Psi Phi With The Atlas Experiment written by Claudio Heller 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.

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

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Author : Claudio Heller
language : en
Publisher:
Release Date : 2013

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 written by Claudio Heller 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.

Measurement Of The Cp Violating Phase Phis And The Decay Width Difference Deltagammas In The Decay B0s J Psi Phi With The Atlas Experiment

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Author : Claudio Heller
language : en
Publisher:
Release Date : 2013

Measurement Of The Cp Violating Phase Phis And The Decay Width Difference Deltagammas In The Decay B0s J Psi Phi With The Atlas Experiment written by Claudio Heller 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.

Measurement Of The Cp Violating Phase Beta S In B S J Psi Phi Decays

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Author :
language : en
Publisher:
Release Date : 2010

Measurement Of The Cp Violating Phase Beta S In B S J Psi Phi 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 2010 with categories.

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 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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Author :
language : en
Publisher:
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.

Lifetime Difference And Cp Asymmetry In The Bs J Psi Phi Decay

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Author :
language : en
Publisher:
Release Date : 2007

Lifetime Difference And Cp Asymmetry In The Bs J Psi Phi Decay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

The B{sub s} meson is an interesting particle to study because a sizable mixing induced CP violation in the B{sub s} -- {bar B}{sub s} system would be an indication for physics beyond the Standard Model. In this paper we present a measurement of the lifetime difference [Delta][Gamma] between the B{sub s} mass eigenstates and the CP violating phase in the decay B{sub s} → J/[psi][phi]. In 1.7 fb−1 of data collected with the CDF II detector at the Tevatron p{bar p} collider we measure [Delta][Gamma] = 0.076{sup +0.059}{sub -0.063} (stat.) ±0.006 (syst.) ps−1, well consistent with the Standard Model prediction, and a mean B{sub s} lifetime of c{sub tau}{sub s} = 456 ± 13 (stat.) ± (syst.) [mu]m. We find no evidence for CP violation.

Measurement Of Cp Violation In B S 0 To J Psi Phi Decays Using The Full Cdf Data Set

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Author :
language : en
Publisher:
Release Date : 2013

Measurement Of Cp Violation In B S 0 To J Psi Phi Decays Using The Full Cdf Data Set 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.

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

Cp Violation In Flavor Tagged B S To J Psi Phi Decays

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Author :
language : en
Publisher:
Release Date : 2009

Cp Violation In Flavor Tagged B S To J Psi Phi 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 2009 with categories.

In this dissertation, we present the results of a time-dependent angular analysis of B{sub s} → J/[psi][phi] decays performed with the use of initial-state flavor tagging. CP violation is observed in this mode through the interference of decay without net mixing and decay with net mixing, that is, B{sub s} → J/[psi][phi] and B{sub s} → {bar B}{sub s} → J/[psi][phi]. The time-dependent angular analysis is used to extract the decay widths of the heavy and light B{sub s} eigenstates and the difference between these decay widths [Delta][Lambda]{sub s} {triple_bond} [Lambda]{sub s}{sup L}-[Lambda]{sub s}{sup H}. Initial-state flavor tagging is used to determine the matter-antimatter content of the B{sub s} mesons at production time. We combine flavor tagging with the angular analysis, which statistically determines the contributions of the CP-even and CP-odd components at decay time, to measure the CP-violating phase [beta]{sub s}. The phase [beta]{sub s} is expressed in terms of elements of the Cabibbo-Kobayashi-Maskawa matrix as [beta]{sub s} {triple_bond} arg (-V{sub ts}V*{sub tb}/V{sub cs}V*{sub cb}), and is predicted by the Standard Model to be close to zero, [beta]{sub s}{sup SM} = 0.02. In the measurement of [Delta][Lambda]{sub s}, we use a dataset corresponding to 1.7 fb−1 of luminosity, collected at the CDF experiment from proton-antiproton collisions at a center of mass energy √s = 1.96 TeV. In the measurement of [beta]{sub s}, we use a dataset corresponding to 1.3 fb−1 of collected luminosity. We measure [Delta][Lambda]{sub s} = (0.071{sub -0.059}{sup +0.064} ± 0.007) ps−1 using the time-dependent angular analysis. Combining the angular analysis with flavor-tagging, we find that assuming the Standard Model predictions of [beta]{sub s} and [Delta][Lambda]{sub s}, the probability of a deviation as large as the level of the observed data is 33%. We obtain a suite of associated results which are discussed in detail in this dissertation alongside the main results.

Measurement Of The Cp Violating Weak Phase Mathrm Phi S And The Decay Width Difference Delta Gamma Mathrm S Using The Mathrm B0 S To Mathrm J

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Author :
language : en
Publisher:
Release Date : 2016

Measurement Of The Cp Violating Weak Phase Mathrm Phi S And The Decay Width Difference Delta Gamma Mathrm S Using The Mathrm B0 S To Mathrm J written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The CP-violating weak phase ?s of the B0 s meson and the decay width difference ??s of the B0 s light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of B0 s →J/? ?(1020) → æ +æ -K+K- decays. Our analysed data set corresponds to an integrated luminosity of 19.7 fb-1 collected in pp collisions at a centre-of-mass energy of 8 TeV. Additionally, a total of 49 200 reconstructed B0 s decays are used to extract the values of ?s and ??s by performing a time-dependent and flavourtagged angular analysis of the æ +æ -K+K- final state. The weak phase is measured to be ?s = -0.075 ± 0.097 (stat) ± 0.031 (syst) rad, and the decay width difference is ??s = 0.095 ± 0.013 (stat) ± 0.007 (syst) ps-1 .

Measurement Of The Cp Violating Phase Beta S In B0s J Psi Phi Decays With The Cdf Ii Detector

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Author :
language : en
Publisher:
Release Date : 2012

Measurement Of The Cp Violating Phase Beta S In B0s J Psi Phi Decays With The Cdf Ii Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

We present a measurement of the \CP-violating parameter \betas using approximately 6500 $\BsJpsiPhi$ decays reconstructed with the CDF\, II detector in a sample of $p\bar p$ collisions at $\sqrt{s}=1.96$ TeV corresponding to 5.2 fb${̂-1}$ integrated luminosity produced by the Tevatron Collider at Fermilab. We find the \CP-violating phase to be within the range $\betas \in [0.02, 0.52] \cup [1.08, 1.55]$ at 68% confidence level where the coverage property of the quoted interval is guaranteed using a frequentist statistical analysis. This result is in agreement with the standard model expectation at the level of about one Gaussian standard deviation. We consider the inclusion of a potential $S$-wave contribution to the $\Bs\to J/\psi K+̂K-̂$ final state which is found to be negligible over the mass interval $1.009