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Peer-reviewedCC BY 4.0Journal of High Energy Physics

Optimal binning of D→ KS0π +π − and D→ KS0K+K− phase space for experimental measurements

  • M. Bovill1
  • N. Jurik2
  • S. Malde1
  1. 1University of Oxford
  2. 2CERN, Esplanade des Particules
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Abstract

A bstract : New binning schemes for the Dalitz plots of D→ KS0π +π − and D→ KS0K+K− decays are presented. These are determined using a new figure of merit for optimisation that better represents the sensitivity to γ than previous metrics. Further augmentation comes from including consideration of degeneracy with other physics parameters determined simultaneously and a more accurate treatment of relevant backgrounds. The overall expected improvement in the precision of γ measurements using B ± → DK ± decays, followed by D→ KS0π +π − , is estimated at around 5%. In addition, the first dedicated optimisation is performed for the observables relevant to charm mixing, x CP and ∆ x , in D→ KS0π +π − decays. This procedure accounts for both statistical sensitivity and the migration of events between bins due to detector resolution. The resulting binning scheme leads to an estimated gain of approximately 20% in statistical sensitivity, while maintaining the bias due to bin migration at a level comparable to the currently used scheme.

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Cite

BibTeXRIS
BibTeX
@article{bovill2026optimal,
  title = {{Optimal binning of $$D\to K_\textS^0\pi ^+\pi ^-$$ and $$D\to K_\textS^0K^+K^-$$ phase space for experimental measurements}},
  author = {M. Bovill and N. Jurik and S. Malde},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)133},
  url = {https://link.springer.com/10.1007/JHEP10(2026)133},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Optimal binning of D→ K_S^0π ^+π ^− and D→ K_S^0K^+K^− phase space for experimental measurements
AU  - M. Bovill
AU  - N. Jurik
AU  - S. Malde
PY  - 2026
DA  - 2026/10/12
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)133
UR  - https://link.springer.com/10.1007/JHEP10(2026)133
AB  - A bstract : New binning schemes for the Dalitz plots of D→ K_S^0π ^+π ^− and D→ K_S^0K^+K^− decays are presented. These are determined using a new figure of merit for optimisation that better represents the sensitivity to γ than previous metrics. Further augmentation comes from including consideration of degeneracy with other physics parameters determined simultaneously and a more accurate treatment of relevant backgrounds. The overall expected improvement in the precision of γ measurements using B ± → DK ± decays, followed by D→ K_S^0π ^+π ^− , is estimated at around 5%. In addition, the first dedicated optimisation is performed for the observables relevant to charm mixing, x CP and ∆ x , in D→ K_S^0π ^+π ^− decays. This procedure accounts for both statistical sensitivity and the migration of events between bins due to detector resolution. The resulting binning scheme leads to an estimated gain of approximately 20% in statistical sensitivity, while maintaining the bias due to bin migration at a level comparable to the currently used scheme.
SN  - 1029-8479
ER  -