First measurement of the CKM angle $\phi_3$ with $B^{\pm}\to D(K_{\rm S}^0\pi^+\pi^-\pi^0)K^{\pm}$ decays

P.K. Resmi , J. Libby , K. Trabelsi (1) , I. Adachi , H. Aihara , S. Al Said , D.M. Asner , V. Aulchenko , T. Aushev , V. Babu , I. Badhrees , A.M. Bakich , C. Beleño , J. Bennett , V. Bhardwaj , B. Bhuyan , T. Bilka , J. Biswal , A. Bozek , M. Bračko , M. Campajola , D. Červenkov , A. Chen , B.G. Cheon , H.E. Cho , K. Cho , Y. Choi , S. Choudhury , D. Cinabro , S. Cunliffe , N. Dash , G. De Nardo , F. Di Capua , S. Di Carlo (1) , Z. Doležal , T.V. Dong , S. Eidelman , D. Epifanov , J.E. Fast , T. Ferber , B.G. Fulsom , R. Garg , V. Gaur , N. Gabyshev , A. Garmash , A. Giri , P. Goldenzweig , B. Golob , Y. Guan , K. Hayasaka , H. Hayashii , W.-S. Hou , K. Huang , T. Iijima , K. Inami , G. Inguglia , A. Ishikawa , R. Itoh , M. Iwasaki , Y. Iwasaki , W.W. Jacobs , H.B. Jeon , Y. Jin , D. Joffe , A.B. Kaliyar , K.H. Kang , G. Karyan , T. Kawasaki , C. Kiesling , D.Y. Kim , K.T. Kim , S.H. Kim , K. Kinoshita , P. Kodyš , D. Kotchetkov , P. Križan , R. Kroeger , P. Krokovny , T. Kuhr , R. Kumar , A. Kuzmin , Y.-J. Kwon , S.C. Lee , Y.B. Li , K. Lieret , D. Liventsev , P.-C. Lu , T. Luo , C. Macqueen , M. Masuda , T. Matsuda , D. Matvienko , M. Merola , K. Miyabayashi , R. Mizuk , G.B. Mohanty , H.K. Moon , T. Nakano , M. Nakao , K.J. Nath , M. Nayak , M. Niiyama , N.K. Nisar , S. Nishida , K. Nishimura , S. Ogawa , H. Ono , Y. Onuki , P. Pakhlov , G. Pakhlova , B. Pal , S. Pardi , H. Park , T.K. Pedlar , R. Pestotnik , L.E. Piilonen , E. Prencipe , M.T. Prim , M. Ritter , M. Röhrken , G. Russo , D. Sahoo , Y. Sakai , S. Sandilya , L. Santelj , T. Sanuki , V. Savinov , O. Schneider , G. Schnell , C. Schwanda , A.J. Schwartz , Y. Seino , K. Senyo , M.E. Sevior , V. Shebalin , C.P. Shen , J.-G. Shiu , B. Shwartz , E. Solovieva , M. Starič , Z.S. Stottler , J.F. Strube , T. Sumiyoshi , M. Takizawa , U. Tamponi , K. Tanida , F. Tenchini , M. Uchida , T. Uglov , S. Uno , Y. Usov , R. van Tonder , G. Varner , A. Vinokurova , V. Vorobyev , A. Vossen , B. Wang , C.H. Wang , M.-Z. Wang , X.L. Wang , S. Watanuki , E. Won , S.B. Yang , H. Ye , Z.P. Zhang , V. Zhilich , V. Zhukova

1 LAL - Laboratoire de l'Accélérateur Linéaire

We present the first model-independent measurement of the CKM unitarity triangle angle ϕ$_{3}$ using B$^{±}$→ D( $ {K}_{\mathrm{S}}^0 $ π$^{+}$π$^{−}$π$^{0}$) K$^{±}$ decays, where D indicates either a D$^{0}$ or $ \overline{D}^{0}$ meson. Measurements of the strong-phase difference of the D → $ {K}_{\mathrm{S}}^0 $ π$^{+}$π$^{−}$π$^{0}$ amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 10$^{6}$B $ \overline{B} $ events collected at the Υ(4S) resonance. We obtain ϕ$_{3}$ = ( $ {5.7}_{-8.8}^{+10.2} $ ±3.5±5.7)$^{°}$ and the suppressed amplitude ratio r$_{B}$ = 0.323±0.147±0.023±0.051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ$_{3}$ is (−29.7, 109.5)$^{°}$, which is consistent with the current world average.

Mots clés: CKM angle gamma; CP violation; e+-e- Experiments; B physics; Flavor physics; electron positron: annihilation; electron positron: colliding beams; B: pair production; B: hadronic decay; D: hadronic decay; CKM matrix: unitarity; Upsilon(10570): electroproduction; statistical; suppression; BELLE; KEK-B; experimental results; B --> D K; D --> K0(S) pi+ pi- pi0; S041ARX; S041DRX; S041GGM

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

P.K. Resmi, J. Libby, K. Trabelsi, I. Adachi, H. Aihara, et al.. First measurement of the CKM angle $\phi_3$ with $B^{\pm}\to D(K_{\rm S}^0\pi^+\pi^-\pi^0)K^{\pm}$ decays. Journal of High Energy Physics, 2019, 10, pp.178. ⟨10.1007/JHEP10(2019)178⟩. ⟨hal-02303023⟩