Scientific and Technical Aerospace Reports PDF Download
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Author:
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Category : Aeronautics
Languages : en
Pages : 542
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 542
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Author: S. Behari
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ISBN:
Category :
Languages : en
Pages : 6
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The authors review B{sub s}{sup 0} and {Lambda}{sub b}{sup 0} lifetime and branching ratio measurements from the CDF and D0 experiments at the Tevatron Run II. Using up to 1 fb{sup -1} data samples per experiment, {Lambda}{sub b}{sup 0} lifetime in J/{Psi}{Lambda}{sup 0} decays, B{sub s}{sup 0} lifetime difference in K{sup +}K{sup -} and D{sub s}{sup (*)+} D{sub s}{sup (*)-} decays and B{sub s}{sup 0} branching ratio in D{sub s1}{sup -}(2536){mu}{sup +} {nu}X decays are reported.
Author: Frederick V. Weber
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Category :
Languages : en
Pages : 566
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Category :
Languages : en
Pages : 7
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ISBN:
Category : Science
Languages : en
Pages : 682
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Category :
Languages : en
Pages :
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The authors have measured a preliminary value for the branching ratio (Gamma)(D*[sup +][sub s] --> D[sup +][sub s][pi][sup 0])/[Gamma](D*[sup +][sub s] --> D[sup +][sub s][gamma]) = 0.0621 [+-] 0.0049(stat) [+-] 0.0063(syst), which is consistent with the previous measurement, but has higher precision. They have also measured [Gamma](D*[sup 0] --> D[sup 0][pi][sup 0])/[Gamma](D*[sup 0] --> D[sup 0][gamma]) = 1.740 [+-] 0.020(stat) [+-] 0.125(syst), which is more precise than, and in agreement with, the world average. The branching fraction B(D*[sup +][sub s] --> D[sup +][sub s][pi][sup 0]) = 0.0585 [+-] 0.0043(stat) [+-] 0.0056(syst) is larger than the theoretical prediction, which is in the 1-3% range. However, it should be noted that the theory predicts a strong correlation between B(D*[sup +][sub s] --> D[sup +][sub s][pi][sup 0]) and B(D*[sup +] --> D[sup +][gamma]); for B(D*[sup +] --> D[sup +][gamma]) [approx]1%, B(D*[sup +][sub s] -- D[sup +][sub s][pi][sup 0]) is expected to be greatly enhanced.
Author:
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Category : Power resources
Languages : en
Pages : 672
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Category : Nuclear energy
Languages : en
Pages : 1260
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Category : Government publications
Languages : en
Pages : 1836
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ISBN:
Category : Physics
Languages : en
Pages : 996
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