Time Dependent Dalitz Plot Analysis Of B0 To D K0pi Decays

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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.

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.

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.

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 The Charmless Decay B Superior 0 K Superior 0 Inferior S Pi Pi At Babar

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Author :
language : en
Publisher:
Release Date : 2007

Time Dependent Dalitz Plot Analysis Of The Charmless Decay B Superior 0 K Superior 0 Inferior 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 2007 with categories.

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 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.

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0

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Author :
language : en
Publisher:
Release Date : 2008

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0 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.

The authors report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K{sup ±}?{sup {-+}}?°. With a sample of (231.8 ± 2.6) x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B° and {bar B}° decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be?(B° → K?−?°) = (35.7{sub -1.5}{sup +2.6} ± 2.2) x 10−6, and?{sub CP} = -0.030{sub -0.051}{sup +0.045} ± 0.055 where the first errors are statistical and the second systematic. They observe the decay B° → K*°(892)?° with the branching fraction?(B° → K*°(892)?°) = (3.6{sub -0.8}{sup +0.7} ± 0.4) x 10−6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B° → {bar D}°?° decays where {bar D}° → K+?−, and they measure?(B° → {bar D}°?°) = (2.93 ± 0.17 {+-} 0.18) x 10−4.

Dalitz Plot Analysis Of B0 K 0 Decays At The Belle Ii Experiment

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Author : Markus Reif
language : en
Publisher:
Release Date : 2024

Dalitz Plot Analysis Of B0 K 0 Decays At The Belle Ii Experiment written by Markus Reif and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024 with categories.

Dalitz Plot Analysis Of B Pi Pi Pi Decays

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Author :
language : en
Publisher:
Release Date : 2009

Dalitz Plot Analysis Of B Pi Pi 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 2009 with categories.

The authors present a Dalitz-plot analysis of charmless B{sup ±} decays to the final state [pi]{sup ±}[pi]{sup ±}[pi]{sup {-+}} using a sample of (465 ± 5) x 106 B{bar B} pairs collected by the BABAR experiment at √s = 10.58 GeV. They measure the branching fractions [Beta](B{sup ±} → [pi]{sup ±}[pi]{sup ±}[pi]{sup {-+}}) = (15.2 ± 0.6 ± 1.2 ± 0.4) x 10−6, [Beta](B{sup {+-}} → [rho]°(770)[pi]{sup {+-}}) = (8.1 {+-} 0.7 {+-} 1.2{sub -1.1}{sup +0.4}) x 10−6, [Beta](B{sup {+-}} → f2(1270)[pi]{sup {+-}}) = (1.57 {+-} 0.42 {+-} 0.16{sub -0.19}{sup +0.53}) x 10−6, and [Beta](B{sup {+-}} → [pi]{sup {+-}}[pi]{sup {+-}}[pi]{sup {-+}} nonresonant) = (5.3 {+-} 0.7 {+-} 0.6{sub -0.5}{sup +1.1}) x 10−6, where the uncertainties are statistical, systematic, and model-dependent, respectively. Measurements of branching fractions for the modes B{sup {+-}} → [rho]°(1450)[pi]{sup {+-}} and B{sup {+-}} → f0(1370)[pi]{sup {+-}} are also presented. They observe no significant direct CP asymmetries for the above modes, and there is no evidence for the decays B{sup {+-}} → f0(980)[pi]{sup {+-}}, B{sup {+-}} → [chi]{sub c0}[pi]{sup {+-}}, or B{sup {+-}} → [chi]{sub c2}[pi]{sup {+-}}.