Recent CP Violation Studies with BABAR. PDF Download
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Languages : en
Pages : 5
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Author:
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Category :
Languages : en
Pages : 5
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Author:
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Category :
Languages : en
Pages : 5
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The BABAR experiment at the PEP-II B factory at SLAC has collected over 37 106 BB pairs in the years 2000 and 2001. Based on this data sample, various studies of CP violation in the B system are presented, including the first observation of CP violation outside the kaon system and a measurement of the CKM parameter sin(2[beta]) = 0.59 ± 0.14(stat) ± 0.05(syst). Studies on direct CP violation and CP violation in mixing are also presented.
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Languages : en
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Languages : en
Pages : 5
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The BABAR and Belle experiments study CP violation in the B meson system. Recent measurements on direct and time-dependent CP asymmetries in B decays are reviewed.
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Languages : en
Pages : 5
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BABAR has studied the time dependent asymmetries in the decays B° → J/[psi]K{sub s}° and B° → [psi](2S) K{sub s}° in a data set of 9.0 fb−1 taken at the [Upsilon](4S) resonance. In these channels we reconstruct 168 events of which 120 are flavor tagged and used in a likelihood fit where we determine sin 2[beta]. The flavor of the other neutral B mesons is tagged using information primarily from identified leptons and Kaons. A neural network is used to recover events without any clear Kaon or lepton signature. A preliminary result of sin 2[beta] = 0.12 ± 0.37 ± 0.09 is obtained.
Author: Ajit Kurup
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Languages : en
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Category :
Languages : en
Pages : 12
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A new detector for investigating the CP violation mechanism in the B meson system is being built and is scheduled to take data at PEP II, the asymmetric B Factory in construction at SLAC, at the end of this century. Its main characteristics are briefly overviewed in this paper. Its sensitivity for measuring CP violation in some selected B decays is also discussed, underlining the great potential of this detector to accomplish a comprehensive study of this phenomenon.
Author:
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Languages : en
Pages : 250
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Languages : en
Pages : 9
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Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of D0 - anti D0 mixing and searches for CP violation in two-body D0 decays, a search for CP violation in the charm decays D" 2!KS0K " and D s" 2!KS0K", KS0[pi]", and a search for direct CP violation in the singly-Cabibbo suppressed D" 2!K+K-[pi]"decays. These studies are based on the fi nal dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter yCP = [0.72 " 0.18(stat) " 0.12(syst)]% excludes the no-mixing null hypothesis with a signifi cance of 3.3[sigma].
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Languages : en
Pages : 9
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The BABAR detector, operating at the SLAC PEP-II asymmetric B Factory, has collected a sample of 32 million B{bar B} pairs by May 2001, at energies close to the?(4S) resonance. The measurement of sin2? = 0.59 ± 0.14(stat) ± 0.05(syst), performed with a study of time-dependent CP-violating asymmetries in neutral B decays, establishes CP violation at the 4? level. In addition, preliminary results on CP-violating asymmetries in the decay channel B° →??− are presented.
