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Re-examining sin(2beta) and Delta m(d) from evolution of B(d) mesons with decoherence

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arxiv 1504.02893 v2 pith:QG4MIKXW submitted 2015-04-11 hep-ph hep-ex

Re-examining sin(2beta) and Delta m(d) from evolution of B(d) mesons with decoherence

classification hep-ph hep-ex
keywords betadecoherencedeltalambdamesondeterminationevolutionlead
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In the time evolution of neutral meson systems, a perfect quantum coherence is usually assumed. The important quantities of the B(d) system, such as sin (2beta) and Delta m(d), are determined under this assumption. However, the meson system interacts with its environment. This interaction can lead to decoherence in the mesons even before they decay. In our formalism this decoherence is modelled by a single parameter lambda. It is desirable to re-examine the procedures of determination of sin(2beta) and Delta m(d) in meson systems with decoherence. We find that the present values of these two quantities are modulated by lambda. Re-analysis of B(d) data from B-factories and LHCb can lead to a clean determination of lambda, sin(2beta) and Delta m(d).

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