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 (KS0h+h−)h+, where D is either a D0 or D¯ 0 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. [Figure not available: see fulltext.]

Combined analysis of Belle and Belle II data to determine the CKM angle ϕ 3 using B + → D(KS0 h + h −)h + decays

Bianchi F.
;
Destefanis M.
;
Maggiora M.
;
Marcello S.
;
Mussa R.
;
Spataro S.
;
2022-01-01

Abstract

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 (KS0h+h−)h+, where D is either a D0 or D¯ 0 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. [Figure not available: see fulltext.]
2022
Inglese
Esperti anonimi
2022
2
0
33
34
B Physics; CKM Angle Gamma; e; +; -e; −; Experiments;
FRANCIA
GERMANIA
SPAGNA
STATI UNITI D'AMERICA
ARABIA SAUDITA
ARMENIA
AUSTRALIA
AUSTRIA
CANADA
CINA REPUBBLICA NAZIONALE (TAIWAN)
COREA DEL SUD
GIAPPONE
INDIA
MESSICO
POLONIA
REPUBBLICA CECA
REPUBBLICA POPOLARE CINESE
RUSSIA
SLOVENIA
THAILANDIA
UCRAINA
VIETNAM
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Abudinen F.; Aggarwal L.; Ahmed H.; Aihara H.; Akopov N.; Al Said S.; Aloisio A.; Anh Ky N.; Asner D.M.; Atmacan H.; Aushev V.; Ayad R.; Babu V.; Bach...espandi
info:eu-repo/semantics/article
open
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1870090
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