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SUMMARY:Discussion K to pi a decay within large N_C chiral perturbation th
 eory
DTSTART;VALUE=DATE-TIME:20260812T003000Z
DTEND;VALUE=DATE-TIME:20260812T005500Z
DTSTAMP;VALUE=DATE-TIME:20260913T135414Z
UID:indico-contribution-2695@indico.itp.ac.cn
DESCRIPTION:Speakers: 金葆 王 (河北师范大学)\nThe decay $K\\to\\p
 i a$ provides the most stringent particle-physics constraints on ALPs with
  masses below 300 MeV. Previous studies have been performed within SU(3) c
 hiral perturbation theory\, where the $\\eta_0$ is integrated out. However
 \, the explicit $\\eta_0$ may play an important role\, since the ALP and t
 he $\\eta_0$ belong to the same flavor-singlet sector. In this talk\, we d
 iscuss the $K\\to\\pi a$ decay in U(3) chiral perturbation theory\, focusi
 ng on the explicit $\\eta_0$ contribution\, the new weak operator\, and th
 e large-$N_C$ behavior of the decay amplitude.\n\nhttps://indico.itp.ac.cn
 /event/416/contributions/2695/
LOCATION:Conference Center (2F) Back Area
URL:https://indico.itp.ac.cn/event/416/contributions/2695/
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