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Measurement Of Cp Observables In B D Cpk Decays And Constraints On The Ckm Angle Gamma
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Book Synopsis Measurement of CP Observables in B__ -]D_CPK__ Decays and Constraints on the CKM Angle Gamma by :
Download or read book Measurement of CP Observables in B__ -]D_CPK__ Decays and Constraints on the CKM Angle Gamma written by and published by . This book was released on 2010 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the entire sample of 467 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we perform a 'GLW' analysis of B{sup ±} 2!D{sup ±} decays, using decay modes in which the neutral D meson decays to either CP-eigenstates or non-CP-eigenstates. We measure the partial decay rate charge asymmetries for CP-even and CP-odd D final states to be A{sub CP+} = 0.25 ± 0.06 ± 0.02 and A{sub CP-} = -0.09 ± 0.07 ± 0.02, respectively, where the first error is the statistical and the second is the systematic uncertainty. The parameter A{sub CP+} is different from zero with a significance of 3.6 standard deviations, constituting evidence for direct CP violation. We also measure the ratios of the charged-averaged B partial decay rates in CP and non-CP decays, R{sub CP+} = 1.18 ± 0.09 ± 0.05 and R{sub CP-} = 1.07 {+-} 0.08 {+-} 0.04. We infer frequentist confidence intervals for the angle [gamma] of the (db) unitarity triangle, for the strong phase difference [delta]{sub B}, and for the amplitude ratio r{sub B}, which are related to the B− 2!D− decay amplitude by r{sub B}e{sup i({delta}{sub b-[gamma]})} = A(B− 2!{bar D}°K−)/A(B− 2!D°K°−). Including statistical and systematic uncertainties, they obtain 0.24
Book Synopsis Measurement of CP-observables with B− [right Arrow] D0K*− Decays by : Quincy Wong
Download or read book Measurement of CP-observables with B− [right Arrow] D0K*− Decays written by Quincy Wong and published by . This book was released on 2008 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Using a sample of 379 million [Upsilon](4S) [right arrow] B anti-B events collected with the BABAR detector at the PEP-II B-factory, I study decays of B− [right arrow] D0K*− where K*− [right arrow] K0s[pi]−, K0s [right arrow] [pi][pi]− and D0 decays into K[pi] and CP-eigenstates. Both CP+ (KK−, [pi][pi]−) and CP- final states (K0s[pi]0, K0s[phi], K0s[omega]) are included. Using the Gronau-London-Wyler (GLW) and Atwood Dunietz-Soni (ADS) methods, CP-observables which are sensitive to the CKM angle [gamma] are measured.
Book Synopsis Time-dependent Measurement of CP Violation and Determination of the CKM Angle Gamma Using Bs->DsKpipi Decays with the LHCb Experiment by : Matthieu Kecke
Download or read book Time-dependent Measurement of CP Violation and Determination of the CKM Angle Gamma Using Bs->DsKpipi Decays with the LHCb Experiment written by Matthieu Kecke and published by . This book was released on 2019* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-dependent Measurement of CP Violation and Determination of the CKM Angle Γ Using B0s → D±sK∓π+π- Decays with the LHCb Experiment by : Matthieu Kecke
Download or read book Time-dependent Measurement of CP Violation and Determination of the CKM Angle Γ Using B0s → D±sK∓π+π- Decays with the LHCb Experiment written by Matthieu Kecke and published by . This book was released on 2019* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of CP Violation and Measurement of the CKM Angle Γ in B0→ DK∗0 Decays by : Hannah Louise Pullen
Download or read book A Study of CP Violation and Measurement of the CKM Angle Γ in B0→ DK∗0 Decays written by Hannah Louise Pullen and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of CP Violation Observables and Parameters for the Decays $B{̂\pm}\to DK{̂*\pm}$ by :
Download or read book Measurement of CP Violation Observables and Parameters for the Decays $B{̂\pm}\to DK{̂*\pm}$ written by and published by . This book was released on 2010 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the decay B− → DK*− using a sample of 379 x 106?(4S) → B{bar B} events collected with the BABAR detector at the PEP-II B-factory. We perform a 'GLW' analysis where the D meson decays into either a CP-even (CP+) eigenstate (KK−,?+?−), CP-odd (CP- ) eigenstate (K{sub S}°?°, K{sub S}°?, K{sub S}°?) or a non-CP state (K−?+). We also analyze D meson decays into K+?− from a Cabibbo-favored {bar D}° decay or doubly suppressed D° decay ('ADS' analysis). We measure observables that are sensitive to the CKM angle?: the partial-rate charge asymmetries A{sub CP±}, the ratios R{sub CP±} of the B-decay branching fractions in CP± and non-CP decay, the ratio R{sub ADS} of the charge-averaged branching fractions, and the charge asymmetry A{sub ADS} of the ADS decays: A{sub CP+} = 0.09 ± 0.13 ± 0.06, A{sub CP-} = -0.23 ± 0.21 ± 0.07, R{sub CP+} = 2.17 ± 0.35 ± 0.09, R{sub CP-} = 1.03 ± 0.27 ± 0.13, R{sub ADS} = 0.066 ± 0.031 ± 0.010, and A{sub ADS} = -0.34 {+-} 0.43 {+-} 0.16, where the first uncertainty is statistical and the second is systematic. Combining all the measurements and using a frequentist approach yields the magnitude of the ratio between the Cabibbo-suppressed and favored amplitudes, r{sub B} = 0.31 with a one (two) sigma confidence level interval of [0.24, 0.38] ([0.17, 0.43]). The value r{sub B} = 0 is excluded at the 3.3 sigma level. A similar analysis excludes values of? in the intervals [0, 7]{sup o}, [55, 111]{sup o}, and [175, 180]{sup o} ([85, 99]{sup o}) at the one (two) sigma confidence level.
Book Synopsis Constraints on the CKM Angle [gamma] [gamma] and Strong Phases from B → [pi] K-decays [pi-K-decays] by : Andrzej J. Buras
Download or read book Constraints on the CKM Angle [gamma] [gamma] and Strong Phases from B → [pi] K-decays [pi-K-decays] written by Andrzej J. Buras and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Constraints on the CKM Angle [gamma] [gamma] and Strong Phases from B -> PK [pi-K] Decays by : Andrzej J. Buras
Download or read book Constraints on the CKM Angle [gamma] [gamma] and Strong Phases from B -> PK [pi-K] Decays written by Andrzej J. Buras and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Constraints on the CKM Angle Γ [gamma] and Strong Phases from B → ΠK [pi-K] Decays by : Andrzej J. Buras
Download or read book Constraints on the CKM Angle Γ [gamma] and Strong Phases from B → ΠK [pi-K] Decays written by Andrzej J. Buras and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of CKM-angle Gamma with Charmed B0 Meson Decays by :
Download or read book Measurement of CKM-angle Gamma with Charmed B0 Meson Decays written by and published by . This book was released on 2007 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports measurements of the time-dependent CP asymmetries in fully reconstructed B° → (D{sup (*){-+}} and B° → D{sup {-+}} [rho]{sup {+-}}) decays in approximately 232 million [Upsilon](4S) → B{bar B} events, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the Stanford Linear Accelerator Center in California, as published in Ref. [14]. The phenomenon of CP violation allows one to distinguish between matter and antimatter, and, as such, is one of the essential ingredients needed to explain the apparent abundance of matter over antimatter in the universe. The Standard Model describes the observed elementary particles in terms of three generations of quarks and leptons, as well as the weak, electromagnetic, and strong interactions between them. In the Standard Model, CP violation is incorporated in the Cabibbo-Kobayashi-Maskawa (CKM) matrix, which describes the weak interactions between the quarks. The weak interactions between quarks are described by coupling constants that are functions of three real parameters and one irreducible complex phase. The magnitude of all CP violating effects in the Standard Model is related to this complex phase. The measurement of the CP violating phase of the CKM matrix is an important part of the present scientific program in particle physics. Violation of the CP symmetry manifests itself as a non-zero area of the Unitarity Triangle. The Unitarity Triangle needs to be overconstrained by experimental measurements in order to demonstrate that the CKM mechanism is the correct explanation of this phenomenon. No stringent measurement of the CKM-angle [gamma] is yet available.
Book Synopsis Improved Measurement of CP Observables in B- to D0_CP K- Decays by :
Download or read book Improved Measurement of CP Observables in B- to D0_CP K- Decays written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of the decay B− 2!D{sub (CP)}°K− and its charge conjugate, where D{sub (CP)}° is reconstructed in both a non-CP flavor eigenstate and in CP (CP-even and CP-odd) eigenstates, based on a sample of 382 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II ee− storage ring. We measure the direct CP asymmetries A{sub CP±} and the ratios of the branching fractions R{sub CP±}: A{sub CP+} = 0.27 ± 0.09(stat) ± 0.04(syst), A{sub CP-} = -0.09 ± 0.09(stat) ± 0.02(syst), R{sub CP+} = 1.06 ± 0.10(stat) ± 0.05(syst), R{sub CP-} = 1.03 {+-} 0.10(stat) {+-} 0.05(syst). These results will help to better constrain the gamma phase parameter of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.
Book Synopsis Measurement of CP Observables in B±→DK∗± Decays Using Two- and Four-body D Final States by :
Download or read book Measurement of CP Observables in B±→DK∗± Decays Using Two- and Four-body D Final States written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of CP Asymmetries for the Decays B^+/- --] D^0_CP K*^+/- by : J. C. Chen
Download or read book Measurement of CP Asymmetries for the Decays B^+/- --] D^0_CP K*^+/- written by J. C. Chen and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEP-II B Factory in 1999-2004, they study B{sup -} {yields} K{sup 0}K*(892){sup -} decays where K*{sup -} {yields} K{sub S}{sup 0} {pi}{sup -} and D{sup 0} {yields} K{sup -}{pi}{sup +}, K{sup -}{pi}{sup +}{pi}{sup 0}, K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} (non-CP final states); K{sup +}K{sup -}, {pi}{sup +}{pi}{sup -} (CP+ eigenstates); K{sub S}{sup 0}{pi}{sup 0}, K{sub S}{sup 0}{phi} and K{sub S}{sup 0}{omega} (CP- eigenstates). They measure four observables that are sensitive to the angle {gamma} of the CKM unitarity triangle; the partial-rate charge asymmetries A{sub CP{+-}} and the ratios of the B-decay branching fraction in CP{+-} and non-CP decays R{sub CP{+-}}: A{sub CP+} = -0.08 {+-} 0.19 (stat.) {+-} 0.08 (syst.); A{sub CP-} = -0.26 {+-} 0.40 (stat.) {+-} 0.12 (syst.); R{sub CP+} = 1.96 {+-} 0.40 (stat.) {+-} 0.11 (syst.); R{sub CP-} = 0.65 {+-} 0.26 (stat.) {+-} 0.08 (syst.).
Book Synopsis Measurements of Direct CP Violation and Constraint on the CKM Triangle in B-]K*pi Decays by : Andrew Phillips Wagner
Download or read book Measurements of Direct CP Violation and Constraint on the CKM Triangle in B-]K*pi Decays written by Andrew Phillips Wagner and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We constrain the apex of the Cabibbo-Kobayashi-Maskawa unitarity triangle with measurements of B-> K*pi amplitudes from analyses of B0-> K+pi-pi0 and B0-> K_Spi+pi- decays. This constraint is consistent with the world average. The B0-> K+pi-pi0 decay mode is reconstructed from a sample of 454 million B0B0bar events collected by the BABAR detector at SLAC. We measure direct CP violation in B0-> K*+pi- decays at the level of 3 sigma when measurements from both B0-> K+pi-pi0 and B0-> K_Spi+pi- decays are combined.
Book Synopsis Measurement of Branching Fraction Ratios and CP Asymmetries in B -]D0 CPK Decays with the BABAR Detector by :
Download or read book Measurement of Branching Fraction Ratios and CP Asymmetries in B -]D0 CPK Decays with the BABAR Detector written by and published by . This book was released on 2010 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goals of the BABAR experiment are the detection of CP violation (CPV) in the B meson system, the precise measurement of some of the elements of the CKM matrix and the measurement of the rates of rare B meson decays. At present, BABAR has achieved major successes: (1) the discovery, in neutral B decays, of direct and mixing-induced CP violation; (2) accurate measurements of the magnitudes of the CKM matrix elements.
Book Synopsis Dalitz Analysis of D0 to K$0\atop{S}$[pi]+[pi]- and Measurement of the CKM Angle [gamma]a in Charged B± Decays to D(*) K± Decays by :
Download or read book Dalitz Analysis of D0 to K$0\atop{S}$[pi]+[pi]- and Measurement of the CKM Angle [gamma]a in Charged B± Decays to D(*) K± Decays written by and published by . This book was released on 2007 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite more than thirty years having elapsed since the discovery of CP violation, our understanding about the source and the nature of this phenomenon is still very limited. In the standard model of particle physics, CP violation is due to the presence of an non-irreducible weak phase in the Cabibbo-Kabayashi-Maskawa(CKM) matrix. Up to now, all the experimental results are in good agreement with the standard model. However, it is important for us to over-constrain the CKM quark-mixing matrix and explore the possibility of new physics beyond the standard model. The B meson provides an ideal place to measure CP violation due to its heavy mass and potentially large CP-violating effects. In particular, the angle [gamma] of the Unitary Triangle relating the elements of the CKM matrix is extremely crucial in terms of CP violation and constraints on the new physics models. Various methods using B- → D0K- decays have been proposed to measure based on the interference between the Vcb and Vub amplitudes. Despite the simple concept, the measurement turns out to be experimentally challenging due to the small branching fraction and the small value of [tau]B, the amplitude ratio between the two contributing Feynman diagrams. In this thesis a novel technique to measure [gamma] in B- → D(*) K- decay using a Dalitz plot analysis of D0 → K{sub s}[pi]+[pi]- is presented. Until the turn on of LHC b [1] later in the decade, this remains the most promising method to measure [gamma]. This thesis is roughly separated into two parts. The first part involves a study of hadron spectroscopy and the Dalitz plot analysis of the D0→ K$0\atop{S}$[pi]+[pi]-. The second part of the thesis involves the measurement of [gamma] in B- → D(*) K- using the results of the D0 → K$0\atop{S}$[pi]+[pi]- dalitz plot analysis.
Book Synopsis Atmospheric Aerosols by : Rekha Kale
Download or read book Atmospheric Aerosols written by Rekha Kale and published by Scitus Academics LLC. This book was released on 2015-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric Aerosols is a vital problem in current environmental research due to its importance in atmospheric optics, energetics, radiative transfer studies, chemistry, climate, biology and public health. Aerosols can influence the energy balance of the terrestrial atmosphere, the hydrological cycle, atmospheric dynamics and monsoon circulations. Because of the heterogeneous aerosol field with large spatial and temporal variability and reduction in uncertainties in aerosol quantification is a challenging task in atmospheric sciences. Keeping this in view the present study aims to assess the impact of aerosols on coastal Indian station Visakhapatnam and the adjoining Bay of Bengal. An aerosol is a colloid of fine solid particles or liquid droplets, in air or another gas. Aerosols can be natural or not. Examples of natural aerosols are fog, forest exudates and geyser steam.
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