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Measurement of B0 → KS0 π0γ Decays at Belle II

Belle II, Collaboration
•
Adachi, I.
•
Aggarwal, L.
altro
null, null
2025
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We report measurements of time-dependent CP asymmetries in B0→KS0π0γ decays based on a data sample of (388±6)×106 BB ̄ events collected at the Υ(4S) resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy e+e- collider. We measure decay-time distributions to determine CP -violating parameters S and C. We determine these parameters for two ranges of KS0π0 invariant mass: m(KS0π0)(0.8,1.0) GeV/c2, which is dominated by B0→K∗0(→KS0π0)γ decays, and a complementary region m(KS0π0)(0.6,0.8)(1.0,1.8) GeV/c2. Our results have improved precision as compared to previous measurements and are consistent with theory predictions.
DOI
10.1103/physrevlett.134.011802
WOS
WOS:001399982500002
Archivio
https://hdl.handle.net/11368/3121652
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85214132777
https://ricerca.unityfvg.it/handle/11368/3121652
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/3121652/1/PhysRevLett.134.011802.pdf
Soggetti
  • Belle II

  • SuperKEKB

  • Standard Model

  • B meson

  • Bottom meson

  • flavor-changing neutr...

  • CP asymmetry

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