Measurement of the B[sup 0] and B[sup+] Meson Lifetimes with Fully Reconstructed Hadronic Final States PDF Download
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![Measurement of the B[sup 0] and B[sup+] Meson Lifetimes with Fully Reconstructed Hadronic Final States PDF](https://books.google.com/books/content/images/frontcover/NLnLjwEACAAJ?fife=w150-h200)
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The B[sup 0] and B[sup+] meson lifetimes have been measured in e[sup+]e[sup -] annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the[Upsilon](4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B[sup 0] and the B[sup+] decay time difference distributions yields[tau][sub B[sup 0]]= 1.546[+-] 0.032 (stat)[+-] 0.022 (syst) ps, [tau][sub B[sup+]]= 1.673[+-] 0.032 (stat)[+-] 0.023 (syst) ps and[tau][sub B[sup+]]/[tau][sub B[sup 0]]= 1.082[+-] 0.026 (stat)[+-] 0.012 (syst).
![Measurement of the B[sup 0] and B[sup+] Meson Lifetimes with Fully Reconstructed Hadronic Final States PDF](https://books.google.com/books/content/images/frontcover/NLnLjwEACAAJ?fife=w80-h100)
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The B[sup 0] and B[sup+] meson lifetimes have been measured in e[sup+]e[sup -] annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the[Upsilon](4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B[sup 0] and the B[sup+] decay time difference distributions yields[tau][sub B[sup 0]]= 1.546[+-] 0.032 (stat)[+-] 0.022 (syst) ps, [tau][sub B[sup+]]= 1.673[+-] 0.032 (stat)[+-] 0.023 (syst) ps and[tau][sub B[sup+]]/[tau][sub B[sup 0]]= 1.082[+-] 0.026 (stat)[+-] 0.012 (syst).
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Pages : 5
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The B° and B meson lifetimes have been measured in ee− annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the [Upsilon](4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B° and the B+ decay time difference distributions yields [tau]{sub B{sup 0}} = 1.546 ± 0.032 (stat) ± 0.022 (syst) ps, [tau]{sub B{sup +}} = 1.673 ± 0.032 (stat) ± 0.023 (syst) ps and [tau]{sub B{sup +}}/[tau]{sub B{sup 0}} = 1.082 ± 0.026 (stat) ± 0.012 (syst).
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Data collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC are used to measure the lifetimes of the B[sup 0] and B[sup+] mesons. The data sample consists of 8.3 fb[sup -1] collected near the[Upsilon](4S) resonance. B[sup 0] and B[sup+] mesons are fully reconstructed in several exclusive hadronic decay modes to charm and charmonium final states. The B lifetimes are determined from the flight length difference between the two B mesons.
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Pages : 75
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Lifetime measurements for B0 and B+ are presented using semileptonic decays of B mesons from 360 pb-1 of data collected by CDF's lepton plus displaced track trigger. The decays B 2!l[nu]DX, where D is either D +, D0, or D* +, are partially reconstructed from a muon or electron, a displaced track, and a fully reconstructed charm meson. The B 0 and B+ lifetimes are obtained from an unbinned maximum-likelihood fit to the proper decay length distributions. The measured lifetimes are [tau]B 0 = 1.527 ± 0.012(stat.) ± 0.023(syst.)ps and [tau]B + = 1.629 ± 0.013(stat.) ± 0.025(syst.)ps.
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![A Measurement of the Neutral B Meson Lifetime Using Partially Reconstructed B0 -] D*-pi+ Decays PDF](https://books.google.com/books/content/images/frontcover/dLvVjwEACAAJ?fife=w80-h100)
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The neutral B meson lifetime has been measured with the data collected by the BABAR detector at the PEP-II storage ring during the year 2000 for a total integrated luminosity of 20.3 fb[sup -1]. The B[sup 0][yields] D*[sup -][pi][sup+] decays have been selected with a partial reconstruction method in which only the fast pion from the B[sup 0] decay and the slow pion from D*[sup -][yields][bar D][sup 0][pi][sup -] are reconstructed. The B[sup 0] lifetime has been measured to be 1.510[+-] 0.040[+-] 0.038 ps with a sample of 6971[+-] 241 reconstructed signal events.
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