Constraints on the CKM angle γ from B± → Dh± decays using D → h±h′∓π0 final states

Constraints on the CKM angle γ from B± → Dh± decays using D → h±h′∓π0 final states

Bibliografiset tiedot
Parent link:Journal of High Energy Physics
Vol. 2022, iss. 7.— 2022.— [99, 23 p.]
Yhteisötekijät: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР)
Muut tekijät: Aaij R. Roel, Abdelmotteleb A. S., Beteta C. A. Carlos Abellan, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Vagner A. R. Aleksandr Rudolfovich
Yhteenveto:Title screen
A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B± → Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B± → [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B± → [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.
Kieli:englanti
Julkaistu: 2022
Aiheet:
электронный ресурс
труды учёных ТПУ
CKM Angle Gamma
CP Violation
Hadron-Hadron scattering (experiments)
B Physics
Linkit:http://earchive.tpu.ru/handle/11683/80980
https://doi.org/10.1007/JHEP07(2022)099
Aineistotyyppi: Elektroninen Kirjan osa
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668900
Kuvaus
Yhteenveto:Title screen
A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B± → Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B± → [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B± → [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.
DOI:10.1007/JHEP07(2022)099

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