Measurement Of Cp Violating Asymmetries In B0 To Rho Pi0 Using A Time Dependent Dalitz Plot Analysis PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Measurement Of Cp Violating Asymmetries In B0 To Rho Pi0 Using A Time Dependent Dalitz Plot Analysis PDF full book. Access full book title Measurement Of Cp Violating Asymmetries In B0 To Rho Pi0 Using A Time Dependent Dalitz Plot Analysis.
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2005 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-Violating Asymmetries in B0 to (rho Pi)0 Using a Time-Dependent Dalitz Plot Analysis Book in PDF, ePub and Kindle
We present the preliminary measurement of CP-violating asymmetries in B° → (??)° →??−?° decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 213 million?(4S) → B{bar B} decays, collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. This analysis extends the narrow-rho quasi-two-body approximation used in the previous analysis, by taking into account the interference between the rho resonances of the three charges. We measure 16 coefficients of the bilinear form factor terms occurring in the time-dependent decay rate of the B° meson with the use of a maximum-likelihood fit. We derive the physically relevant quantities from these coefficients. We measure the direct CP-violation parameters A{sub??} = -0.088 ± 0.049 ± 0.013 and C = 0.34 ± 0.11 ± 0.05, where the first errors are statistical and the second systematic. For the mixing-induced CP-violation parameter we find S = -0.10 ± 0.14 ± 0.04, and for the dilution and strong phase shift parameters respectively, we obtain?C = 0.15 ± 0.11 ± 0.03 and?S = 0.22 ± 0.15 ± 0.03. For the angle alpha of the Unitarity Triangle we measure (113−1--{sup +27} ± 6){sup o}, while only a weak constraint is achieved at the significance level of more than two standard deviations. Finally, for the relative strong phase?{sub ±} between the B° →?−?+ and B° → {rho}+?− transitions we find ( -67−31{sup +28} {+-} 7) deg, with a similarly weak constraint at two standard deviations and beyond.
| Author | : B. Aubert |
| Publisher | : |
| Total Pages | : 32 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-Violating Asymmetries in B0 to (rho Pi)0 Using a Time-Dependent Dalitz Plot Analysis Book in PDF, ePub and Kindle
We report a measurement of CP-violating asymmetries in B{sup 0} {yields} ({rho}{pi}){sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 347 million {Upsilon}(4S) {yields} B{bar B} decays, collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure 26 coefficients of the bilinear form factor terms occurring in the time-dependent decay rate of the B{sup 0} meson and derive the physically relevant quantities from these coefficients. In particular we find a three standard deviation evidence of direct CP-violation in the B{sup 0} {yields} {rho}{sup {+-}}{pi}{sup {-+}} decays, with systematic uncertainties included. We also achieve a constraint of the angle {alpha} of the Unitarity Triangle. All results presented are preliminary.
| Author | : Tomonari Scott Miyashita |
| Publisher | : |
| Total Pages | : |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-violating Asymmetries in B^0 --] (rho Pi)^0 Using a Time-dependent Dalitz Plot Analysis Book in PDF, ePub and Kindle
We present results for a time-dependent Dalitz plot measurement of CP-violating asymmetries in the mode B^0 --> pi^+ pi^- pi^0, dominated by B^0 --> rho^\pm pi^\mp (rho^\pm --> pi^\pm pi^0) decays. Our dataset is derived from the complete sample of 471 x 10^6 B-Bbar meson pairs collected by the BABAR detector at the PEP-II asymmetric-energy e^+e^- collider at the SLAC National Accelerator Laboratory, operating on the Upsilon(4S) resonance. We extract parameters describing the time-dependent B^0 --> rho pi decay probabilities and CP asymmetries, including C, DeltaC, S, and DeltaS, finding these measurements to be consistent with the results of previous analyses. Additionally, we present a two-dimensional likelihood scan of the direct CP-violation asymmetry parameters for B^0 --> rho^\pm pi^\mp decays, finding the results to be consistent with direct CP violation at ~ 2 sigma significance. Finally, we present information on the CP-violating parameter alpha, corresponding to an angle in the unitarity triangle associated with the CKM quark-mixing matrix. We perform a likelihood scan of alpha that incorporates constraints from B^\pm --> rho pi measurements by means of isospin relationships. A robustness study assessing the reliability with which alpha is extracted provides important insights into the interpretation of this result.
| Author | : |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-violating Asymmetries in B0̂ \to (rho-pi)0̂ Decays Using a Time-dependent Daltiz Plot Analysis Book in PDF, ePub and Kindle
| Author | : |
| Publisher | : |
| Total Pages | : 22 |
| Release | : 2008 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-Violating Asymmetries in the B0-]K+K-Ks Dalitz Plot Book in PDF, ePub and Kindle
The authors present a preliminary measurement of CP-violation parameters in the decay B° → KK−K{sub S}°, using approximately 465 million B{bar B} events collected by the BABAR detector at SLAC. Reconstructing the neutral kaon as K{sub S}° →?+?− or K{sub S}° →?°?°, they analyze the Dalitz plot distribution and measure fractions to intermediate states. They extract CP parameters from the asymmetries in amplitudes and phases between B° and {bar B}° decays across the Dalitz plot. From a fit to the whole Dalitz plot, they measure?{sub eff} = 0.44 ± 0.07 ± 0.02, A{sub CP} = 0.03 ± 0.07 ± 0.02, where the first uncertainties are statistical and the second ones are systematic. For decays to?K{sub S}°, they measure?{sub eff} = 0.13 ± 0.13 ± 0.02, A{sub CP} = 0.14 ± 0.19 ± 0.02. For decays to f0K{sub S}°, they measure?{sub eff} = 0.15 ± 0.13 ± 0.03, A{sub CP} = 0.01 ± 0.26 ± 0.07. From a fit to the region of the Dalitz plot with m{sub K{sup +}K−}> 1.1 GeV/c2, they measure?{sub eff} = 0.52 ± 0.08 ± 0.03, A{sub CP} = 0.05 ± 0.09 ± 0.04.
| Author | : |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
Download Measurement of Time-Dependent CP-Violating Asymmetries in B0 -]K*0 Gamma (K*0-]K0{sub S} Pi0) Decays Book in PDF, ePub and Kindle
We present a measurement of the time-dependent CP-violating asymmetries in B° → K*°[gamma](K*° → K{sub S}°[pi]°) decays based on 124 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. In a sample containing 105 ± 14 signal decays, we measure S{sub K*{sub {gamma}}} = 0.25 ± 0.63 ± 0.14 and C{sub K*{sub {gamma}}} = -0.57 ± 0.32 ± 0.09, where the first error is statistical and the second systematic.
| Author | : Markus Röhrken |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 205 |
| Release | : 2013-10-17 |
| Genre | : Science |
| ISBN | : 3319007262 |
Download Time-Dependent CP Violation Measurements Book in PDF, ePub and Kindle
This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2001 |
| Genre | : |
| ISBN | : |
Download Measurement of CP-Violating Asymmetries in B0 Decays to CP Eigenstates Book in PDF, ePub and Kindle
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23 million[Upsilon](4S)[yields] B[bar B] decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events where one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2[beta], is derived from the decay time distributions in such events. The result is sin2[beta]= 0.34[+-] 0.20 (stat)[+-] 0.05 (syst).
| Author | : |
| Publisher | : |
| Total Pages | : 7 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
Download Measurements of CP-violating Asymmetries in B0 -] Ks Pi0 Decays Book in PDF, ePub and Kindle
We present a measurement of the time-dependent CP-violating (CPV) asymmetries in B° → K{sub s}°[pi]° decays based on 124 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In a sample containing 122 ± 16 signal decays, we obtain the magnitude of the direct CPV asymmetry C{sub K{sub S}°[pi]°} = 0.40 {sub -0.28}{sup +0.27} ± 0.09 and the magnitude of the CPV asymmetry in the interference between mixing and decay S{sub K{sub S}°[pi]°} = 0.48 {sub -0.47}{sup +0.38} ± 0.06 where the first error is statistical and the second systematic.
| Author | : |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
Download Measurement of Time-dependent CP Asymmetries InB0-]D(*)pi and B0-]Drho Decays Book in PDF, ePub and Kindle
We present updated results on time-dependent CP asymmetries in fully reconstructed B° → D{sup (*)±}[pi]{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 SLAC. From a time-dependent maximum likelihood fit we obtain for the parameters related to the CP violation angle 2[beta] + [gamma]: a{sup D{pi}} = -0.010 ± 0.023 ± 0.007, c{sub lep}{sup D{pi}} = -0.033 ± 0.042 ± 0.012, a{sup D*{pi}} = -0.040 ± 0.023 ± 0.010, C{sub lep}{sup D*{pi}} = 0.049 ± 0.042 ± 0.015, a{sup D{rho}} = -0.024 ± 0.031 ± 0.009, c{sub lep}{sup D{rho}} = -0.098 {+-} 0.055 {+-} 0.018, where the first error is statistical and the second is systematic. Using other measurements and theoretical assumptions, we interpret the results in terms of the angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle and find
