Download or read book Measurement of the CKM Angle Alpha with the B factories written by and published by . This book was released on 2005 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: B-meson decays involving b → u transitions are sensitive to the Unitarity Triangle angle [alpha] (or [phi]2). The B-factories at SLAC and KEK have made significant progress toward the measurement of [alpha] in recent years. This paper summarizes the results of the B-factories' constraints on [alpha].
Download or read book Measurement of the CKM Angle Alpha at BaBar written by C. Yeche and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present BABAR experiment studies to measure the CKM angle {alpha} of the Unitarity Triangle. The measurements are based on the B meson decays into the two-body state ({pi}{pi}), the quasi two-body state ({rho}{rho}), and the three-body state ({pi}{sup +}{pi}{sup -}{pi}{sup 0}). The results are obtained from data samples of about 230 million {Upsilon}(4S) {yields} B{bar B} decays collected between 1999 and 2004 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
Download or read book Measurements of the CKM Angle Alpha at BaBar written by and published by . This book was released on 2012 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improved Measurement of the CKM Angle Alpha Using B0 to Rho rho Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from an analysis of B° ({bar B}°) →??− using 232 million?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the longitudinal polarization fraction f{sub L} = 0.978 ± 0.014(stat){sub -0.029}{sup +0.021}(syst) and the CP-violating parameters S{sub L} = -0.33 ± 0.24(stat){sub -0.14}{sup +0.08}(syst) and C{sub L} = -0.03 ± 0.18(stat) ± 0.09(syst). Using an isospin analysis of B →?? decays we determine the unitarity triangle?. The solution compatible with the Standard Model is? = (100 ± 13){sup o}.
Download or read book Updated Measurement of the CKM Angle Alpha Using B0 rho rho Decays written by B. Aubert and published by . This book was released on 2006 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results from an analysis of B{sup 0} {yields} {rho}{sup +}{rho}{sup -} using 316 fb{sup -1} of {Upsilon}(4S) {yields} B{bar B} decays observed with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They measure the B{sup 0} {yields} {rho}{sup +}{rho}{sup -} branching fraction, longitudinal polarization fraction f{sub L}, and the CP-violating parameters S{sub long} and C{sub long}: {Beta}(B{sup 0} {yields} {rho}{sup +}{rho}{sup -}) = (23.5 {+-} 2.2(stat) {+-} 4.1(syst)) x 10{sup -6}, f{sub L} = 0.977 {+-} 0.024(stat){sub -0.013}{sup +0.015}(syst), S{sub long} = -0.19 {+-} 0.21(stat){sub -0.07}{sup +0.05}(syst), C{sub long} = -0.07 {+-} 0.15(stat) {+-} 0.06(syst). Using an isospin analysis of B {yields} {rho}{rho} decays they determine the angle {alpha} of the unitarity triangle. One of the two solutions, {alpha} [74,117]{sup o} at 68% CL, is compatible with the standard model. All results presented here are preliminary.
Download or read book Measurement of the CKM Angle Alpha at the BABAR Detector Using B Meson Decays to Rho Final States written by Attila Mihalyi and published by . This book was released on 2005 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of the CKM Angle phi 1 beta at the B Factories written by and published by . This book was released on 2013 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the CKM Angle Alpha written by and published by . This book was released on 2013 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental Interactions written by Alan Astbury and published by World Scientific. This book was released on 2008 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains the latest results from the field of particle physics. The contributions cover the current status of all the Large Hadron Collider (LHC) experiments, the implications of the LHC for cosmology, and the search for dark matter and nuclear astrophysics. It also includes work on the current status of the future International Linear Collider (ILC).
Download or read book Studies of CP Violation in Charmless Three Body b Hadron Decays written by Daniel O'Hanlon and published by Springer. This book was released on 2018-11-02 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights two essential analyses of data collected during the LHCb experiment, based on the Large Hadron Collider at CERN. The first comprises the first observation and studies of matter-antimatter asymmetries in two three-body b-baryon decays, paving the way for more precise measurements of the relatively unknown decay properties of b-baryon decays. The second is an analysis of a charged B meson decay to three charged pions, where previously large matter-antimatter asymmetries were observed in a model-independent analysis. Here a model of the decay amplitude is constructed using the unitarity-conserving ‘K-matrix’ model for the scalar contributions, so as to gain an understanding of how the previously observed matter-antimatter asymmetries arise; further, the model’s construction yields the most precise and comprehensive study of this decay mode to date.
Download or read book Recent Results on the CKM Angle Alpha written by A. Mihalyi and published by . This book was released on 2005 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The method to measure the CKM angle {alpha} and the modes sensitive to it are discussed. It is shown that the B {yields} {rho}{rho} decays provide the most stringent constraint on {alpha}, which is found to be {alpha} = 96{sup o} {+-} 10{sup o}(stat) {+-} 4{sup o}(syst){+-} 13{sup o}(penguin).
Download or read book Measurement of Alpha written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current results on B 2!?? decays and SU(2) constraints on the Unitarity Triangle angle? or?2 from the B-factories are summarized. Based on these measurements, predictions of the isospin analysis constraints at the end of the lifetime of both B-factories are given.
Download or read book B Decay and CP Violation written by and published by . This book was released on 2011 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A remarkable success has been achieved by the B-Factories, going beyond expectation in some field, like the measurement of [gamma]. BABAR has now finished its data taking, leaving BELLE alone in the 'race', but still many analyses are going on. The CKM UT is constrained by both measurements of CP-conserving and CP-violating quantities, leading to a picture of the CKM sector consistent with the SM. Measurements of semi-leptonic decays benefit from improving experimental techniques and more precise theoretical computations. The angle [beta] is a precision measurement, reaching accuracy of SM calculation. The angle [alpha] will ultimatly be limited by penguin pollution. The measurement of [gamma] is reaching the 13{sup o} precision.
Download or read book Measurements of CKM Angles Beta phi 1 and Alpha phi 2 at the Babar and Belle Experiments written by and published by . This book was released on 2009 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report measurements of the CKM angles?/?1 and?/?2 done by the BABAR and Belle experiments. Both experiments have collected large data samples, corresponding to a total of more than 1 billion of B{bar B} pairs, at the ee− asymmetric-energy colliders PEP-II (SLAC) and KEK-B (KEK), respectively.
Download or read book Measurement of the Angle Alpha at BABAR written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present recent measurements of the CKM angle [alpha] using data collected by the BABAR detector at the PEP-II asymmetric-energy ee− collider at the SLAC National Accelerator Laboratory, operating at the [Upsilon](4S) resonance. They present constraints on [alpha] from B 2![pi][pi], B 2![rho][rho] and B 2![rho][pi] decays.
Download or read book Measurements Related to the CKM Angle Beta Phi1 from BABAR written by and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements related to the CKM angle [beta] from BABAR based on 82 or H"15 fb−1 data samples collected at the PEP-II ee− asymmetric B Factory collider. A new method allowing to measure the sign of cos2[beta] with B° 2!J/[psi] ''K*°'' events is explained and related results reported. Recent CP measurements in the penguin dominated modes B° 2![phi]K°, B° 2!K K− K{sub S}°, B° 2![pi]° K{sub S}° and B° 2!f0 (980)K{sub S}° are presented.
Download or read book Constraints on the CKM Angle Alpha in the B to Rho Rho Decays written by H. Li and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a data sample of 122 million {Upsilon}(4S) {yields} B{bar B} decays collected with BABAR detector at the PEP-II asymmetric B factory at SLAC, we measure the time-dependent-asymmetry parameters of the longitudinally polarized component in the B{sup 0} {yields} {rho}{sup +}{rho}{sup -} decay as C{sub L} = -0.23 {+-} 0.24(stat) {+-} 0.14(syst) and S{sub L} = -0.19 {+-} 0.33(stat) {+-} 0.11(syst). The B{sup 0} {yields} {rho}{sup 0}{rho}{sup 0} decay mode is also searched for in a data sample of about 227 million B{bar B} pairs. No significant signal is observed, and an upper limit of 1.1 x 10{sup -6} (90% C.L.) on the branching fraction is set. The penguin contribution to the CKM angle {alpha} uncertainty is measured to be 11{sup o}. All results are preliminary.
