Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-31
Nucl.Phys. B590 (2000) 19-36
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, to appear in Nucl. Phys B; some minor corrections inluded, additional discussion added to some sections, references
Scientific paper
10.1016/S0550-3213(00)00548-4
In this work we analyze the observable asymmetries one can build from entangled B-meson states, in order to extract information on the parameters epsilon and delta which govern indirect violation of discrete symmetries. The traditionally proposed observables, based on flavour tags, are not helpful for the study of the Bd-system, where the tiny value of the width difference between physical states clears up such asymmetry effects. Our study makes instead use of CP tags in order to build new asymmetries where the different parameters can be separated out. For this separation, it is decisive to achieve a good time resolution in the measurement of entangled state decays. Nevertheless, even with no temporal information, as would be the case in a symmetric factory, it is still possible to extract some information on the symmetries of the system. We discuss both genuine and non-genuine observables, depending on whether absorptive parts can mimic or not asymmetry effects.
Banuls Mari Carmen
Bernabeu Jose
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