Measurement of CP Violation at the $Υ(4S)$ without Time Ordering or $Δt$

Details Measurement of CP Violation at the $Υ(4S)$ without Time Ordering or $Δt$ Measurement of CP Violation at the $Υ(4S)$ without Time Ordering or $Δt$

1999-07-08

arxiv.org/abs/hep-ph/9907277v1

Phys.Rev.D60:111301,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevD.60.111301

I derive the expressions for the CP-violating asymmetry arising from interference between mixed and direct decays in the Upsilon(4S) system, for the case in which only one of the B decay times is observed, integrating over the decay time of the other B. I observe that neither the difference of the decay times Delta t, nor even their time-ordering, need be detected. A technique for measurement of the CP-violating weak decay parameter sin(2beta) is described which exploits this observation.

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