E-viri
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Adinolfi, Marco; Ajaltouni, Ziad; Alvarez Cartelle, Paula; Andreotti, Mirco; Atzeni, Michele; Baldini, Wander; Barlow, Roger; Beddow, John; Bediaga, Ignacio; Bertholet, Emilie; Betancourt, Christopher; Van Beuzekom, Martinus; Bjørn, Mikkel; Bondar, Nikolay; Brundu, Davide; Cai, Hao; Carboni, Giovanni; Cardini, Alessandro; Carniti, Paolo; Carson, Laurence; Cenci, Riccardo; Chefdeville, Maximilien; Chobanova, Veronika; Cid Vidal, Xabier; Clemencic, Marco; Cojocariu, Lucian; Contu, Andrea; De Bruyn, Kristof; De Cian, Michel; De Serio, Marilisa; Dembinski, Hans Peter; Dettori, Francesco; Dijkstra, Hans; Dorigo, Mirco; Evans, Hannah Mary; Farry, Stephen; Ferrari, Fabio; Forty, Roger; Gao, Yuanning; Gascon, David; Granado Cardoso, Luis Alberto; Hadavizadeh, Thomas; Hadjivasiliou, Christos; Harnew, Neville; Humair, Thibaud; Jacobsson, Richard; Khairullin, Egor; Kim, Kyung Eun; Klaver, Suzanne; Klimkovich, Tatsiana; Kolpin, Michael; Kress, Felix Johannes; Leflat, Alexander; Lefrançois, Jacques; Mackowiak, Patrick; Malde, Sneha; Marin Benito, Carla; Martinelli, Maurizio; Minzoni, Luca; Molina Rodriguez, Josue; Mombächer, Titus; Nakada, Tatsuya; Nasteva, Irina; Obraztsov, Vladimir; Onderwater, Gerco; Owen, Patrick; Palutan, Matteo; Parkes, Christopher; Pearce, Alex; Pereima, Dmitrii; Polukhina, Natalia; Pomery, Gabriela Johanna; Qian, Wenbin; Quintana, Boris; Rama, Matteo; Ratnikov, Fedor; Romero Vidal, Antonio; Saitta, Biagio; Sarpis, Gediminas; Schmidt, Burkhard; Schopper, Andreas; Sepulveda, Eduardo Enrique; Stagni, Federico; Stramaglia, Maria Elena; Straumann, Ulrich; Strokov, Sergey; Thomas, Eric; Van Tilburg, Jeroen; Vagner, Alexander; Verlage, Tobias Anton; Vesterinen, Mika; Vollhardt, Achim; Williams, Mark Richard James; Wilson, Fergus; Wimberley, Jack; Xie, Yuehong; Xu, Ao; Xu, Qingnian; Yushchenko, Oleg; Zonneveld, Jennifer Brigitta
2018Report
The first observation of the $B_s^0 \to \overline{D}^0 K^+ K^-$ decay is reported, together with the most precise branching fraction measurement of the mode $B^0 \to \overline{D}^0 K^+ K^-$. The results are obtained from an analysis of $pp$ collision data corresponding to an integrated luminosity of $3.0~\textrm{fb}^{-1}$. The data were collected with the LHCb detector at centre-of-mass energies of $7$ and $8$ TeV. The branching fraction of the $B^0 \to \overline{D}^0 K^+ K^-$ decay is measured relative to that of the decay $B^0 \to \overline{D}^0 \pi^+ \pi^-$ to be $$\frac{\mathcal{B}(B^0 \to \overline{D}^0 K^+ K^-)}{\mathcal{B}(B^0 \to \overline{D}^0 \pi^+ \pi^-)} = (6.9 \pm 0.4 \pm 0.3)\%,$$ where the first uncertainty is statistical and the second is systematic. The measured branching fraction of the $B_s^0 \to \overline{D}^0 K^+ K^-$ decay mode relative to that of the corresponding $B^0$ decay is $$\frac{\mathcal{B}(B_s^0 \to \overline{D}^0 K^+ K^-)}{\mathcal{B}(B^0 \to \overline{D}^0 K^+ K^-)} = (93.0 \pm 8.9 \pm 6.9)\%.$$ Using the known branching fraction of ${B^0 \to \overline{D}^0 \pi^+ \pi^-}$, the values of ${{\mathcal B}(B^0 \to \overline{D}^0 K^+ K^- )=(6.1 \pm 0.4 \pm 0.3 \pm 0.3) \times 10^{-5}}$, and ${{\cal B}(B_s^0 \to \overline{D}^0 K^+ K^-)=}$ $(5.7 \pm 0.5 \pm 0.4 \pm 0.5) \times 10^{-5}$ are obtained, where the third uncertainties arise from the branching fraction of the decay modes ${B^0 \to \overline{D}^0 \pi^+ \pi^-}$ and $B^0 \to \overline{D}^0 K^+ K^-$, respectively.
