Time Dependent Dalitz Analysis Of B0 D K0p Decays For The Measurement Of 2 Beta Y With The Babar Detector
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Time Dependent Dalitz Analysis Of B0 D K0p Decays For The Measurement Of 2 Beta Y With The Babar Detector
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Author :
language : en
Publisher:
Release Date : 2006
Time Dependent Dalitz Analysis Of B0 D K0p Decays For The Measurement Of 2 Beta Y With The Babar 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 2006 with categories.
Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector
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Author : Francesco Polci
language : en
Publisher:
Release Date : 2007
Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector written by Francesco Polci 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 CP violation is explained in the Standard Model with three quark generations with an irreducible phase in the Cabibbo-Kobayashi-Maskawa quark mixing matrix. The unitarity of this matrix can be represented in a complex plane as a triangle (called Unitarity Triangle). The measurement of the parameters of the triangle is a powerful test of the Standard Model description of the CP violation. This thesis tries to measure the weak phase 2beta+ gamma through the B0 -> D+ K0 Pi- decays. Respect to the two body decays B0 -> D(*)+ Pi- and B0 -> D+ Rho- presently used for the measurement of the same weak phase, the B0 -> D+ K0 Pi- decays should show up a larger CP asymmetry and does not rely on any theoretical assumption. After a review of all the methods for the measurement of 2beta+gamma, the thesis presents the results of a feasibility study of the measurement with the B0 -> D+ K0 Pi- decays . In a second part, the analysis performed on 316 fb-1 of data collected by the BaBar detector at the B-factory PEP2 is presented, from the selection of the events to the time-dependent Dalitz fit technique used in order to extract the weak phase 2beta+gamma as well as the amplitudes and phases of the intermediate resonances contributing to the decay. The result of the analysis gives the following estimation: 2beta+gamma = 89 +/- 53(stat) +23-14(syst) degrees with an irreducible ambiguity of 180 degrees.
Time Dependent Dalitz Plot Analysis Of B0 To D K0pi Decays
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Author :
language : en
Publisher:
Release Date : 2008
Time Dependent Dalitz Plot Analysis Of B0 To D K0pi 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.
We present for the first time a measurement of the weak phase 2[beta] + [gamma] obtained from a time-dependent Dalitz plot analysis of B° → D{sup {-+}}K°[pi]{sup ±} decays. Using a sample of approximately 347 x 106 B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy storage rings, we obtain 2[beta] + [gamma] = (83 ± 53 ± 20)° and (263 ± 53 {+-} 20){sup o} assuming the ratio r of the b → u and b → c decay amplitudes to be 0.3. The magnitudes and phases for the resonances associated with the b → c transitions are also extracted from the fit.
2 Beta Gamma From B 0 To D Mp K 0 Pi Pm Decays At Babar
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Author :
language : en
Publisher:
Release Date : 2007
2 Beta Gamma From B 0 To D Mp K 0 Pi Pm Decays At Babar 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 present the results of a simulation study to perform the extraction of 2[beta] + [gamma] from B° → D{sup {-+}}K°[pi]{sup {+-}} decays through a time-dependent Dalitz analysis of BaBar data.
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0 S Pi Pi At Babar
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Author :
language : en
Publisher:
Release Date : 2009
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0 S Pi Pi At Babar 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.
A time-dependent amplitude analysis of B° → K{sub S}°??− decays is performed in order to extract the CP violation parameters of f0(980)K{sub S}° and?°(770)K{sub S}° and direct CP asymmetries of K*+(892)?−. The results are obtained from the final BABAR data sample of (465 ± 5)106 B{bar B} decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The time dependent CP asymmetry for f0(980)K{sub S}° and?°(770)K{sub S}° are measured to be S(f0(980)K{sub S}°) = -0.97 ± 0.09 ± 0.01 ± 0.01, and S(?°(770)K{sub S}°) = 0.67 ± 0.20 ± 0.06 ± 0.04, respectively. In decays to K*+(892)?− the direct CP asymmetry is found to be A{sub CP}(K*{sup ±}(892)?{sup {-+}}) = -0.18 ± 0.10 ± 0.04 ± 0.00. The relative phases between B° → K*+(892)?− and {bar B}° → K*−(892)?+, relevant for the extraction of the unitarity triangle angle?, is measured to be??(K*(892)?) = (34.9 ± 23.1 ± 7.5 {+-} 4.7){sup o}, where uncertainties are statistical, systematic and model-dependent, respectively. Fit fractions, direct CP asymmetries and the relative phases of different other resonant modes have also been measured. A new method for extracting longitudinal shower development information from longitudinally unsegmented calorimeters is also presented. This method has been implemented as a part of the BABAR final particle identification algorithm. A significant improvement in low momenta muon identification at BABAR is obtained.
Time Dependent Analysis Of B0 2 Rho 0 Rho 0 Decays
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Author :
language : en
Publisher:
Release Date : 2009
Time Dependent Analysis Of B0 2 Rho 0 Rho 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 2009 with categories.
The BABAR detector at the PEP-II asymmetric-energy e+e- collider is located at the Stanford Linear Accelerator Center. It has been gathering data on the [Upsilon](4S) resonance from 2000 until 2007 with the primary objective of studying CP violation in B-meson decays. In this thesis they provide a theoretical overview of how CP violation arises in the context of the Standard Model, why B decays are relevant, and how BABAR gathers the necessary data. Specifically, they present the analysis of B0 2!rho]0[rho]0 decays in a sample of 465 x 106 [Upsilon](4S) 2!B$\bar{B}$. They measure the corresponding branching fraction [beta] = (0.92 ± 0.32(stat.) ± 0.14(syst.)) x 10-6 and the longitudinal polarization fraction fL = 0.75-0.14+0.11(stat.) ± 0.04(syst.). The evidence for the B02![rho]0[rho]0 signal has a significance of 3.1 standard deviations ([sigma]), when the systematic uncertainties are included. There is insufficient evidence for B decays into similar modes and the corresponding upper limits are determined to be [beta][rho]0f0
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0s At Babar
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Author : Pablo del Amo Sanchez
language : en
Publisher:
Release Date : 2007
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0s At Babar written by Pablo del Amo Sanchez 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.
Dalitz Plot Analysis Of B D Pi Pi
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Author :
language : en
Publisher:
Release Date : 2009
Dalitz Plot Analysis Of B D Pi Pi 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.
The author reports on a Dalitz plot analysis of B− → D+?−?− decays, based on a sample of about 383 million ?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They find the total branching fraction of the three-body decay: ?(B− → D+ ?−?−) = (1.08 ± 0.01 ± 0.05) x 10−3. the masses and widths of D*2° and D*0°, the 2+ and 0+ c{bar u} P-wave states decaying to D+?−, are measured: m{sub D*2°} = (2460.4 ± 1.2 ± 1.2 ± 1.9) MeV/c2, ?{sub D*2°} = (41.8 ± 2.5 ± 2.1 ± 2.0) MeV, m{sub D*0°} = (2297 ± 8 ± 5 ± 19) MeV/c2 and ?{sub D*0°} = (273 ± 12 ± 17 ± 45) MeV. The stated errors reflect the statistical and systematic uncertainties, and the uncertainty related to the assumed composition of signal events and the theoretical model.
B0 To Pi Pi Pi0 Time Dependent Dalitz Analysis At Babar
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Author :
language : en
Publisher:
Release Date : 2007
B0 To Pi Pi Pi0 Time Dependent Dalitz Analysis At Babar 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 author presents here results of a time-dependent analysis of the Dalitz structure of neutral B meson decays to??−?° from a dataset of 346 million B{bar B} pairs collected at the?(4S) center of mass energy by the BaBar detector at the SLAC PEP-II e+e− accelerator. No significant CP violation effects are observed and 68% confidence interval is derived on the weak angle? to be [75,152].
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0s At Babar
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Author : Jelena Ili?
language : en
Publisher:
Release Date : 2009
Time Dependent Dalitz Plot Analysis Of The Charmless Decay B0 K0s At Babar written by Jelena Ili? 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.