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$Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II$

Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II

by Borah, J. , de Sangro, R. , Di Canto, A. , Briere, R. , Aloisio, A. , Corona, L. , Chirapatpimol, K. , Chang, P. , Cheema, P. , Czank, T. , de la Motte, S. , Domínguez Jiménez, I. , Dubey, S. , Chekelian, V. , Doležal, Z. , Belous, K. , Chilikin, K. , Di Capua, F. , Bertholet, E. , Eliachevitch, M. , Das, S. , Feichtinger, P. , Ferber, T. , Baudot, J. , Branchini, P. , Dhamija, R. , Bolz, A. , Bozek, A. , Bianchi, F. , Asner, D. , Bertacchi, V. , Ecker, P. , Cremaldi, L. , Atmacan, H. , de Marino, G. , Cerasoli, J. , Aushev, T. , Becker, J. , de Yta-Hernandez, A. , De Nardo, G. , Dreyer, S. , Dong, T. , Bilka, T. , Bertemes, M. , Becherer, F. , Destefanis, M. , Bernlochner, F. , Bhuyan, B. , Bauer, M. , Akopov, N. , Dingfelder, J. , Bettarini, S. , Casarosa, G. , Aversano, M. , Cecchi, C. , Ayad, R. , Barrett, M. , Behera, P. , Bussino, S. , Dey, S. , Dujany, G. , de Nuccio, M. , Campajola, M. , Browder, T. , Dorigo, M. , Cho, K. , Bennett, J. , Aushev, V. , Choi, S.-K. , Anh Ky, N. , Choi, Y. , Beaubien, A. , Choudhury, S. , Cheon, B. , Banerjee, Sw , de Pietro, G. , Budano, A. , Ferlewicz, D. , Bae, H. , Biswas, D. , Dort, K. , Bahinipati, S. , Adachi, I. , Bodrov, D. , Aggarwal, L. , De La Cruz-Burelo, E. , Bessner, M. , Dossett, D. , Bambad

in Physics

2024

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Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II

in Physics

2024

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$Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II$

Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II

in Physics

2024

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$Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II$

Journal Article

Measurement of branching-fraction ratios andCPasymmetries inB^(±) → D_(CP±)K^(±)decays at Belle and Belle II

Borah, J.,

de Sangro, R.,

Di Canto, A.,

Briere, R.,

Aloisio, A.,

Corona, L.,

Chirapatpimol, K.,

Chang, P.,

Cheema, P.,

Czank, T.,

de la Motte, S.,

Domínguez Jiménez, I.,

Dubey, S.,

Chekelian, V.,

Doležal, Z.,

Belous, K.,

Chilikin, K.,

Di Capua, F.,

Bertholet, E.,

Eliachevitch, M.,

Das, S.,

Feichtinger, P.,

Ferber, T.,

Baudot, J.,

Branchini, P.,

Dhamija, R.,

Bolz, A.,

Bozek, A.,

Bianchi, F.,

Asner, D.,

Bertacchi, V.,

Ecker, P.,

Cremaldi, L.,

Atmacan, H.,

de Marino, G.,

Cerasoli, J.,

Aushev, T.,

Becker, J.,

de Yta-Hernandez, A.,

De Nardo, G.,

Dreyer, S.,

Dong, T.,

Bilka, T.,

Bertemes, M.,

Becherer, F.,

Destefanis, M.,

Bernlochner, F.,

Bhuyan, B.,

Bauer, M.,

Akopov, N.,

Dingfelder, J.,

Bettarini, S.,

Casarosa, G.,

Aversano, M.,

Cecchi, C.,

Ayad, R.,

Barrett, M.,

Behera, P.,

Bussino, S.,

Dey, S.,

Dujany, G.,

de Nuccio, M.,

Campajola, M.,

Browder, T.,

Dorigo, M.,

Cho, K.,

Bennett, J.,

Aushev, V.,

Choi, S.-K.,

Anh Ky, N.,

Choi, Y.,

Beaubien, A.,

Choudhury, S.,

Cheon, B.,

Banerjee, Sw,

de Pietro, G.,

Budano, A.,

Ferlewicz, D.,

Bae, H.,

Biswas, D.,

Dort, K.,

Bahinipati, S.,

Adachi, I.,

Bodrov, D.,

Aggarwal, L.,

De La Cruz-Burelo, E.,

Bessner, M.,

Dossett, D.,

Bambad

2024

Overview

We report results from a study ofB^(±) → DK^(±)decays followed byDdecaying toCP eigenstates, whereDindicates aD⁰orD̄⁰meson. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angleφ₃ . The results are based on a combined analysis of the final data set of772 × 10⁶ BB̄pairs collected by the Belle experiment and a data set of198 × 10⁶ BB̄pairs collected by the Belle II experiment, both in electron-positron collisions at theΥ(4S)resonance. We measure theCPasymmetries to be 𝓐_(CP +) = (+12.5 ± 5.8 ± 1.4)% and 𝓐_(CP -) = (-16.7 ± 5.7 ± 0.6)% , and the ratios of branching fractions to be 𝓡_(CP+)= 1.164 ± 0.081 ± 0.036 and 𝓡_(CP-) = 1.151 ± 0.074 ± 0.019 . The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries𝓐_(CP +)and𝓐_(CP -)have similar magnitudes and opposite signs; their difference corresponds to 3.5 standard deviations. From these values we calculate 68.3% confidence intervals of ( 8.5°<φ₃<16.5° ) or ( 84.5°<φ₃<95.5° ) or ( 163.3°<φ₃<171.5° ) and0.321

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Springer

Subject

Physics