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SUMMARY:Correction to $CP$-asymmetry in $\\Upsilon(4S)$ decays due to the 
 admixture of $B^0 \\bar B^0$ in a $C$-even state
DTSTART;VALUE=DATE-TIME:20261030T070000Z
DTEND;VALUE=DATE-TIME:20261030T071500Z
DTSTAMP;VALUE=DATE-TIME:20261101T090747Z
UID:indico-contribution-6156@cern.ch
DESCRIPTION:Speakers: Natalia Panchenko ()\n$BB$ pairs from $\\Upsilon(4S)
 \\to BB$ decays are in $C$-odd state. However\, there is a small admixture
  of the $C$-even state and it modifies the time dependent $CP$-asymmetry. 
 The $C$-even component appears due to soft photon emission\, breaking the 
 pure $C$-odd nature of the initial state. Using the two-particle wave func
 tion formalism\, we derive analytical expressions for $CP$-asymmetry in bo
 th pure and mixed $C$-parity states. We emphasize the strong energy depend
 ence of the admixture magnitude.\n\nhttps://indico.particle.mephi.ru/event
 /626/contributions/6156/
LOCATION: Conference Hall 3
URL:https://indico.particle.mephi.ru/event/626/contributions/6156/
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