Measurement of the Bsup + and Bsup 0 Meson Lifetimes Using Exclusive B Yields PsiK Decays at CDF. PDF Download
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![Measurement of the B[sup+] and B[sup 0] Meson Lifetimes Using Exclusive B[yields][psi]K Decays at CDF. PDF](https://books.google.com/books/content/images/frontcover/GuO2DAEACAAJ?fife=w80-h100)
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The authors present recent CDF measurements of[tau][sup+], [tau][sup 0], and[tau][sup+]/[tau][sup 0] using exclusive B[yields][psi]K decays, where B= B[sup+] or B[sup 0], [psi]= J/[psi] or[psi](2S), and K= K[sup+], K*(892)[sup 0], K[sub S][sup 0], or K*(892)[sup+]. The precision of these results is less than 10% and is nearly identical to that previously reported at LEP.
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![Measurement of the B[sup+] and B[sup 0] Lifetimes at CDF. PDF](https://books.google.com/books/content/images/frontcover/7wjYjwEACAAJ?fife=w80-h100)
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Two measurements of the lifetime of neutral and charged B mesons in p[bar p] collisions at[radical]s= 1.8 TeV by the CDF experiment are presented. The first relies on the study of exclusive decays of the type B[yields][psi] K, the second on semileptonic decays of a B meson into a D[degrees] or a D. The combined results are[tau](B[sup+])= 1.62[+-] 0.09 ps, [tau](B[sub 0])= 1.60[+-] 0.09 ps and[tau](B[sup+])/[tau](B[sup 0])= 1.00[+-] 0.07.
![Measurement of the B and B° Meson Lifetimes Using Exclusive B 2![psi]K Decays at CDF. PDF](https://books.google.com/books/content/images/frontcover/D_yvAQAACAAJ?fife=w80-h100)
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Pages : 5
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The authors present recent CDF measurements of [tau], [tau]°, and [tau]/[tau]° using exclusive B 2![psi]K decays, where B = B+ or B°, [psi] = J/[psi] or [psi](2S), and K = K+, K*(892)°, K{sub S}°, or K*(892)+. The precision of these results is less than 10% and is nearly identical to that previously reported at LEP.
![Measurement of the B/s0 Lifetime in B/s0 --] K+ K- Decays PDF](https://books.google.com/books/content/images/frontcover/vzFMAQAACAAJ?fife=w80-h100)
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Pages : 218
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A method is presented to simultaneously separate the contributions to a sample of B{sub (s)}° 2!hh{sup {prime}-} decays, where h = [pi] or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb−1 of data collected at CDF the B° lifetime is measured as [tau]{sub B°} = 1.558{sub -0.047}{sup +0.050}{sub stat} ± 0.028{sub syst} ps, in agreement with the world average measurement. The B{sub s}° lifetime in the B{sub s}° 2!KK− decay is measured as [tau]{sub B{sub s}° 2!K+K−} = 1.51{sub -0.11}{sup +0.13}{sub stat} ± 0.04{sub syst} ps. No difference is observed between the lifetime and other measurements of the average B{sub s}° lifetime or the lifetime of the light B{sub s}° mass eigenstate determined from B{sub s}° 2!J/[psi][phi] decays. With the assumptions that B{sub s}° 2!K+K− is 100% CP-even and that [tau]{sub B{sub s}°} = [tau]{sub B°} the width difference in the B{sub s}{sup 0} system is determined as [Delta][Lambda]{sup CP}/[Lambda] = 0.03{sub -0.15}{sup +0.17}{sub stat} ± 0.05{sub syst} using the current world average B{sup 0} lifetime. This is consistent with zero and with the current world average measurement.
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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.
