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Published January 1, 2022 | Version v1
Journal article Open

Combined analysis of Belle and Belle II data to determine the CKM angle phi(3) using B+ -> D(K(S)(0)h(+)h(-))h(+) decays

Creators

  • 1. Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
  • 2. Panjab Univ, Chandigarh 160014, India
  • 3. St Francis Xavier Univ, Antigonish, NS B2G 2W5, Canada
  • 4. Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
  • 5. Alikhanyan Natl Sci Lab, Yerevan 0036, Armenia
  • 6. Vietnam Acad Sci & Technol VAST, Inst Phys, Hanoi, Vietnam
  • 7. Brookhaven Natl Lab, Upton, NY 11973 USA
  • 8. Univ Cincinnati, Cincinnati, OH 45221 USA
  • 9. Taras Shevchenko Natl Univ Kiev, Kiev, Ukraine
  • 10. Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia
  • 11. Univ Strasbourg, CNRS, IPHC, UMR 7178, F-67037 Strasbourg, France
  • 12. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
  • 13. Karlsruher Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe, Germany
  • 14. Indian Inst Technol Bhubaneswar, Satya Nagar 751007, India
  • 15. Univ Paris Saclay, IJCLab, CNRS IN2P3, F-91405 Orsay, France
  • 16. Univ Louisville, Louisville, KY 40292 USA

Description

We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle phi(3) (also known as gamma) using a model-independent Dalitz plot analysis of B+ -> D(K(S)(0)h(+)h(-))h(+), where D is either a D-0 or (D) over bar (0) meson and h is either a pi or K. This is the first measurement that simultaneously uses Belle and Belle II data, combining samples corresponding to integrated luminosities of 711 fb(-1) and 128 fb(-1), respectively. All data were accumulated from energy-asymmetric e(+)e(-) collisions at a centre-of-mass energy corresponding to the mass of the Upsilon(4S) resonance. We measure phi(3) = (78.4 +/- 11.4 +/- 0.5 +/- 1.0)degrees, where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is from the uncertainties on external measurements of the D-decay strong-phase parameters.

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