Measurement Of The Lifetime Difference And Cp Violating Phase In B S J Psi Phi Decays

DOWNLOAD

Download Measurement Of The Lifetime Difference And Cp Violating Phase In B S J Psi Phi Decays PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Measurement Of The Lifetime Difference And Cp Violating Phase In B S J Psi Phi Decays book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Measurement Of The Lifetime Difference And Cp Violating Phase In B 1tns J Y63 F63 J Psi Phi Decays

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Lifetime Difference And Cp Violating Phase In B 1tns J Y63 F63 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 2007 with categories.

Measurement Of The Lifetime Difference And Cp Violating Phase In Bs J J Psi Phi Decays

DOWNLOAD
Author : Michael Milnik
language : en
Publisher:
Release Date : 2007

Measurement Of The Lifetime Difference And Cp Violating Phase In Bs J J Psi Phi Decays written by Michael Milnik 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.

Measurement Of The Lifetime Difference And Cp Violating Phase In B S J Psi Phi Decays

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Lifetime Difference And Cp Violating Phase 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 2007 with categories.

Over the past decades the current theoretical description, the Standard Model of elementary particle physics, was solidified by many measurements as the basic theory describing fundamental particles and their interactions. It is extremely successful in explaining the high-precision data collected by experiments so far. The Standard Model includes several intrinsic parameters which have to be measured in experiments. Independent analyses of different physical processes can constrain those parameters. By combining those measurements physicists might be sensitive to physics beyond the Standard Model. If they are inconsistent it allows to get a hint on the theory that might supersede the Standard Model. The goal of the analysis presented in this thesis is to measure some of these parameters in the B{sub s} meson system. The B{sub s} meson, consisting of an anti-b and s quark, is not a pure mass eigenstate, thus allowing a B{sub s} meson to oscillate into its antiparticle via weak interacting processes. This is a general feature of any neutral meson. The history of meson mixing measurements is more then 50 years old. It was first observed in the kaon system. The oscillation in the B{sub d} system was measured very precisely by the B factories, whereas the oscillation frequency of the B{sub s} was measured with more than 5[sigma] significance last year by CDF and first evidence for mixing in the D0 system was presented only this year.

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

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

DOWNLOAD
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.

Cp Violation In B S 0 J Psi Phi Decays

DOWNLOAD
Author : Sabato Leo
language : en
Publisher: Springer
Release Date : 2014-07-24

Cp Violation In B S 0 J Psi Phi Decays written by Sabato Leo and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-24 with Science categories.

This thesis reports on the final measurement of the flavor-mixing phase in decays of strange-bottom mesons (B_s) into J/psi and phi mesons performed in high-energy proton-antiproton collisions recorded by the Collider Experiment at Fermilab. Interference occurs between direct decays and decays following virtual particle-antiparticle transitions (B_s-antiB_s). The phase difference between transition amplitudes (“mixing phase”) is observable and extremely sensitive to contributions from non-standard-model particles or interactions that may be very hard to detect otherwise – a fact that makes the precise measurement of the B_s mixing phase one of the most important goals of particle physics. The results presented include a precise determination of the mixing phase and a suite of other important supplementary results. All measurements are among the most precise available from a single experiment and provide significantly improved constraints on the phenomenology of new particles and interactions.

Measurement Of Lifetime And Decay Width Difference In B0s J Psi Phi Decays

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2007

Measurement Of Lifetime And Decay Width Difference In B0s 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 2007 with categories.

The authors measure the mean lifetime, [tau] = 2/([Lambda]{sub L} + [Lambda]{sub H}), and the decay-width difference, [Delta][Lambda] = [Lambda]{sub L} - [Lambda]{sub H}, of the light and heavy mass eigenstates of the B{sub s}° meson, B{sub sL}° and B{sub sH}°, in B{sub s}° → J/[psi][phi] decays using 1.7 fb−1 of data collected with the CDF II detector at the Fermilab Tevatron p{bar p} collider. Assuming CP conservation, a good approximation for the B{sub s}° system in the standard model, they obtain [Delta][Lambda] = 0.076{sub -0.063}{sup +0.059}(stat.) ± 0.006(syst.) ps−1 and [tau] = 1.52 ± 0.04(stat.) ± 0.02(syst.) ps, the most precise measurements to date. The constraints on the weak phase and [Delta][Lambda] are consistent with CP conservation.

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

DOWNLOAD
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.

Measurement Of The Cp Violating Phase Phis Using Bs J Psi Phi And Bs J Psi Pi Pi Decays With The Lhcb Experiment

DOWNLOAD
Author : Christian Linn
language : en
Publisher:
Release Date : 2013

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

DOWNLOAD
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.