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Measurement of the CKM Angles [alpha] and [gamma] at the BABAR Experiment

Measurement of the CKM Angles [alpha] and [gamma] at the BABAR Experiment
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Release: 2004
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The primary objective of the BABAR Experiment is to test the Standard Model explanation of CP violation in weak decays by over-constraining the CKM Unitarity Triangle. This includes the measurement of all three angles of the triangle. Although precise measurements of the angle [beta] have been obtained using B decays to charmonium states, the remaining angles, [alpha] and [gamma], pose greater experimental challenges. In this paper, the latest measurements of modes which will constrain [alpha] and [gamma] will be presented, including B[sup 0] --> [rho][sup +][rho][sup -] for [alpha] and a measurement of sin(2[beta] + [gamma]) from the B[sup 0] --> D(*)[sup [+-]][pi][sup [-+]] system.

Measurement of the CKM Angles? And? at the BABAR Experiment

Measurement of the CKM Angles? And? at the BABAR Experiment
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Total Pages: 5
Release: 2004
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The primary objective of the BABAR Experiment is to test the Standard Model explanation of CP violation in weak decays by over-constraining the CKM Unitarity Triangle. This includes the measurement of all three angles of the triangle. Although precise measurements of the angle? have been obtained using B decays to charmonium states, the remaining angles,? and?, pose greater experimental challenges. In this paper, the latest measurements of modes which will constrain? and? will be presented, including B° -->??− for? and a measurement of sin(2? +?) from the B° --> D(*){sup {+-}}?{sup {-+}} system.

Measurement of the CKM Angle Alpha at BaBar

Measurement of the CKM Angle Alpha at BaBar
Author: C. Yeche
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Total Pages: 4
Release: 2006
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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.

Measurements of the CKM Angle Gamma at BaBar

Measurements of the CKM Angle Gamma at BaBar
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Total Pages: 4
Release: 2007
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We present a short review of the measurements of the CKM angle [gamma] performed by the BABAR experiment. We focus on methods using charged B decays, which give a direct access to [gamma] and provide the best constraints so far.

Measurements of CKM Angles Beta/phi_1 and Alpha/phi_2 at the Babar and Belle Experiments

Measurements of CKM Angles Beta/phi_1 and Alpha/phi_2 at the Babar and Belle Experiments
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Total Pages: 6
Release: 2009
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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.

CP Violation Results from B Decays at BaBar

CP Violation Results from B Decays at BaBar
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Total Pages: 8
Release: 2011
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In the present paper we review recent experimental results from the BABAR experiment concerning the measurement of the CKM angles. A particular highlight is given to the novel independent determination of the angle [alpha] from B° → a1(1260){sup {+-}}[pi]{sup {-+}} and to the recent full-luminosity updates of several angle [gamma] measurements.

Recent Results from the BaBar Experiment

Recent Results from the BaBar Experiment
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Release: 2004
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The authors present an overview of some of the most recent results from the BABAR experiment. They discuss the latest measurement of the time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates, that in the Standard Model (SM) is proportional to sin 2[beta]. They present measurements of branching fractions and CP-violating asymmetries in neutral B decays to two-body final states of charged pions and kaons, that are related to the angle [alpha] of the Unitarity Triangle. They also report the B[sup 0] lifetime measurement obtained from studying the B[sup 0] [yields] D*[sup -] [pi][sup +] and B[sup 0] [yields] D*[sup -] [rho][sup +] decay channels and the B[sup 0] [yields] D*[sup -] a[sub 1][sup +] branching fraction, obtained using a partial reconstruction technique. These measurements serve as a test and validation of the procedures required to measure the combination of CKM Unitarity Triangle angles sin(2[beta] + [gamma]).