Title: Combined analysis of Belle and Belle II data to determine the CKM angle φ3 using B+ → D($$ {K}_S^0 $$h+h–)h+ decays

Journal Article · · Journal of High Energy Physics (Online)
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We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle φ3 (also known as γ) using a model-independent Dalitz plot analysis of B+ → D($$ {K}_S^0 $$h+h–)h+, where D is either a Do or Do¯ meson and h is either a π 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 Υ(4S) resonance. We measure φ3 = (78.4 ± 11.4 ± 0.5 ± 1.0)°, 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Organization:
National Science Foundation; USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Belle and Belle II Collaborations
Grant/Contract Number:
SC0010118; SC0012704
OSTI ID:
1855080
Report Number(s):
BNL-222866-2022-JAAM
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 2 Vol. 2022; ISSN 1029-8479
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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