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of the [bar over B][0 over s] D[ over s]D[+ over s] and [bar over B][0 over s] D[superscript ]D[+ over s] Effective Lifetimes Measurement of the [bar over B][0 over s] D[ over s]D[+ over s] and [bar over B][0 over s] D[superscript ]D[+ over s] Effective Lifetimes. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters.