Measurement Of Direct Cp Violation In B Cc And Dcc Quark Transitions Using B J Vk And B J Vm Decays
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Measurement Of Direct Cp Violation In B Cc And Dcc Quark Transitions Using B J Vk And B J Vm Decays
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Author : Kostyantyn Holubyev
language : en
Publisher:
Release Date : 2008
Measurement Of Direct Cp Violation In B Cc And Dcc Quark Transitions Using B J Vk And B J Vm Decays written by Kostyantyn Holubyev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Measurement Of Direct Cp Violation In B U2192 Sc Bar C And B U2192 D Barc C Quark Transitions Using B U2192 J Psik And B U2192 J Decays
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Author :
language : en
Publisher:
Release Date : 2008
Measurement Of Direct Cp Violation In B U2192 Sc Bar C And B U2192 D Barc C Quark Transitions Using B U2192 J Psik And B U2192 J 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 2008 with categories.
This thesis describes the measurement of the direct CP violation in the b → sc$ar{c}$ transition using the decay B+ → J/?K+, and in the b → dc$ar{c}$ transition using the decay B+ → J/??+. The decays of B+ mesons are reconstructed in approximately 2.8 fb-1 of data recorded by D0 detector in 2002-2007 during Run II of Fermilab Tevatron collider. Using the unbinned likelihood fit, a signal of 40,222 ± 242 of B+ → J/?K+ and 1,578 ± 119 of B+ → J/??+ events is obtained. The corresponding direct CP violation asymmetries are measured to be ACP(B+ → J/?(1S)K+) = +0.0077 ± 0.0061(stat.) ± 0.0027(syst.), and ACP(B+ → J/?(1S)?+) = - 0.089 ± 0.081(stat.) ± 0.028(syst.). The result on ACP (B+ → J/?(1S)K+) is consistent with the 2007 world average and is the most precise measurement of this asymmetry, with uncertainty approaching the level of the Standard Model prediction. The result on ACP (B+ → J/?(1S)?+) constitutes the first measurement of this asymmetry at the hadron collider, with uncertainty at the level of the 2007 world average. The measurement presented in this thesis has become possible due to the sophisticated online and offline tracking/vertexing implemented at D0, and the regular reversal of the polarities of the D0 detector magnets.
Measurement Of Direct Cp Violation In B 2 Sc Bar C And B 2 D Barc C Quark Transitions Using B 2 J Psik And B 2 J Psi Pi Decays
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Author :
language : en
Publisher:
Release Date : 2008
Measurement Of Direct Cp Violation In B 2 Sc Bar C And B 2 D Barc C Quark Transitions Using B 2 J Psik And B 2 J Psi Pi 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 2008 with categories.
This thesis describes the measurement of the direct CP violation in the b → sc$\bar{c}$ transition using the decay B+ → J/[Psi]K+, and in the b → dc$\bar{c}$ transition using the decay B+ → J/[Psi][pi]+. The decays of B+ mesons are reconstructed in approximately 2.8 fb-1 of data recorded by D0 detector in 2002-2007 during Run II of Fermilab Tevatron collider. Using the unbinned likelihood fit, a signal of 40,222 ± 242 of B+ → J/[Psi]K+ and 1,578 ± 119 of B+ → J/[Psi][pi]+ events is obtained. The corresponding direct CP violation asymmetries are measured to be ACP(B+ → J/[Psi](1S)K+) = +0.0077 ± 0.0061(stat.) ± 0.0027(syst.), and ACP(B+ → J/[Psi](1S)[pi]+) = - 0.089 ± 0.081(stat.) ± 0.028(syst.). The result on ACP (B+ → J/[Psi](1S)K+) is consistent with the 2007 world average and is the most precise measurement of this asymmetry, with uncertainty approaching the level of the Standard Model prediction. The result on ACP (B+ → J/[Psi](1S)[pi]+) constitutes the first measurement of this asymmetry at the hadron collider, with uncertainty at the level of the 2007 world average. The measurement presented in this thesis has become possible due to the sophisticated online and offline tracking/vertexing implemented at D0, and the regular reversal of the polarities of the D0 detector magnets.
Measurement Of Direct Cp Violation Parameters In B Pm To J Psi K Pm And B Pm To J Psi Pi Pm Decays With 10 4 Fb 1 Of Tevatron Data
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of Direct Cp Violation Parameters In B Pm To J Psi K Pm And B Pm To J Psi Pi Pm Decays With 10 4 Fb 1 Of Tevatron Data 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.
Cp Violation From Quarks To Leptons
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Author : M. Giorgi
language : en
Publisher: IOS Press
Release Date : 2006-07-25
Cp Violation From Quarks To Leptons written by M. Giorgi and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-07-25 with Science categories.
For a long time after the discovery in 1964, by Christenson, Cronin, Fitch and Turlay, that the long-lived neutral kaon decays both into three and into two pions, which has since been taken as proof of CP violation, successive new and more precise experiments confirmed the original evidence and provided results compatible with a phenomenological description confining the CP violation to the mixing between neutral kaons and antikaons. However the Standard Model, with three generations of quarks, linking as it does CP violation to the presence of a single non trivial phase in the Cabibbo-Kobayashi-Maskawa quark mixing matrix, implies that if CP violation exists at all, then it is a general property of weak interactions, appearing in transitions were amplitudes involving all three quark families interfere with each other, producing effects with a magnitude related to that of the CKM coefficients. This fact has stimulated an impressive amount of theoretical work leading in many cases to precise predictions. This publication reviews the field, from both the theoretical and experimental point of view, while planning for the forthcoming experimentation at LHC and considering possible new facilities for kaon, B meson and neutrino physics. Abstracted in Inspec
Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 U2192 K0 Bar K 0 And B To Bar K 0k Decays At The Babar Experiment
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Author :
language : en
Publisher:
Release Date : 2007
Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 U2192 K0 Bar K 0 And B To Bar K 0k 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 2007 with categories.
Over the last few years, the B factories have established the Cabbibo-Kobayashi-Maskawa mechanism of CP violation in the Standard Model through the study of the decays of B mesons. The focus of Belle and BaBar has now expanded to the search for signatures of new physics beyond the Standard Model, particularly through examination of flavor-changing neutral-current transitions, which proceed through diagrams involving virtual loops. These decays are suppressed in the Standard Model, increasing sensitivity to new-physics effects but decreasing branching fractions. Exploiting large and growing datasets, BaBar and Belle have made many measurements in loop decays where a b quark transitions to an s quark, observing hints of possible deviations from Standard Model expectations in CP-violating measurements.
Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment
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Author :
language : en
Publisher:
Release Date : 2003
Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive 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.
The BABAR experiment at SLAC provides an opportunity for measurement of CP violation in B decays. A measurement of time-dependent CP violating asymmetries using exclusive B meson decays where the b quark decays to c{bar c}d (including B° 2!D*D*− and B° 2!D*{sup ±}D{sup {-+}} decays) is presented here. This is the first measurement of CP violation in a mode sensitive to the Unitarity Triangle parameter sin2[beta] outside of decays containing charmonium. It provides a comparison to measurements of sin2[beta] using b 2!c{bar c}s, and permits an observation into potential new physics sources of CP violation, such as supersymmetry, via differences between these measurements and those of B° 2!J/[psi] K{sub S}° as statistics of reconstructed neutral B decays to D{sup (*)+} D{sup (*)-} increase. The measured value of the time-dependent CP violating asymmetries are: S = 0.38 ± 0.88(stat) ± 0.12(syst) and C = -0.30 ± 0.50(stat) ± 0.13(syst) for B° 2!D*− D; S = -0.43 ± 1.41(stat) ± 0.23(syst) and C = 0.53 ± 0.74(stat) ± 0.15(syst) for B° 2!D*+ D−; and S = -0.05 ± 0.45(stat) ± 0.05(syst) and C = 0.12 ± 0.30(stat) {+-} 0.05(syst) for B° 2!D*− D+; where S corresponds to CP violation in the interference of mixing and decay and C corresponds to CP violation in decay.
Direct Cp Violation In B To S Gamma Decays
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Author : A. Eichenbaum
language : en
Publisher:
Release Date : 2004
Direct Cp Violation In B To S Gamma Decays written by A. Eichenbaum and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
This dissertation describes a measurement of the direct CP asymmetry between inclusive b {yields} s{gamma} and {bar b} {yields} {bar s}{gamma} decays. This asymmetry is expected to be less than 0.01 in the Standard Model, but could be enhanced up to the order of 0.10 by non-Standard Model contributions. We use a sample of 89 million B{bar B} pairs recorded with the BABAR detector at PEP-II, from which we reconstruct a set of 12 exclusive b {yields} s{gamma} final states containing one charged or neutral kaon and one to three pions. We measure an asymmetry of A{sub CP} (b {yields} s{gamma}) = 0.025 {+-} 0.050(stat.) {+-} 0.015(syst.), corresponding to an allowed range of -0.06
Cp Violation In B S 0 J Psi Phi Decays
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Author : Sabato Leo
language : en
Publisher: Springer
Release Date : 2014-08-07
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 2014-08-07 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.
Cp Violation
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Author : I. I. Bigi
language : en
Publisher: Cambridge University Press
Release Date : 2009-04-30
Cp Violation written by I. I. Bigi and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-04-30 with Science categories.
Why did the matter in our Universe not annihilate itself with antimatter immediately after its creation? The discovery of CP violation may answer this fundamental question and this book presents information and tools necessary to its understanding.