4 years ago

First observation of $B^{+} \to D_s^{+}K^{+}K^{-}$ decays and a search for $B^{+} \to D_s^{+}\phi$ decays.

S. Baker, S. Bachmann, L. Beaucourt, P. Alvarez Cartelle, M. Baalouch, M. Artuso, A. Beiter, K. Belous, A.A. Alves Jr, S. Ali, S. Amato, LHCb collaboration, E. Aslanides, G. Andreassi, W. Baldini, A. Badalov, M. Atzeni, L.J. Bel, A. Bay, M. Andreotti, S. Amerio, Z. Ajaltouni, A. Artamonov, R.B. Appleby, V. Bellee, I. Babuschkin, G. Auriemma, G. Alkhazov, V. Batozskaya, A. Baranov, R. Aaij, Y. Amhis, E. Ben-Haim, F. Alessio, W. Barter, P. d'Argent, G. Bencivenni, C. Baesso, F. Archilli, M. Adinolfi, N. Beliy, L. An, A. Alfonso Albero, V. Balagura, J.J. Back, J. Albrecht, I. Bediaga, C. Barschel, I. Belyaev, N. Belloli, V. Battista, F. Baryshnikov, L. Anderlini, S. Benson, R.J. Barlow, B. Adeva, S. Beranek, J.E. Andrews, J. Beddow, J. Arnau Romeu, S. Akar, S. Barsuk, F. Bedeschi, M. Alexander

A search for $B^{+} \to D_s^{+}K^{+}K^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 4.8 fb$^{-1}$, collected at centre-of-mass energies of 7, 8 and 13$\,$TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to be \begin{equation*} \mathcal{B}(B^{+} \to D_s^{+}K^{+}K^{-} ) = (7.1 \pm 0.5 \pm 0.6 \pm 0.7) \times 10^{-6}, \end{equation*} where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode $B^{+} \to D_s^{+} \overline{\kern -0.2em D}^{0}$. A search is also performed for the pure annihilation decay $B^{+} \to D_s^{+}\phi$. No significant signal is observed and a limit of \begin{equation*} \mathcal{B}(B^{+} \to D_s^{+}\phi) < 4.9 \times 10^{-7}~(4.2 \times 10^{-7}) \end{equation*} is set on the branching fraction at 95$\%$ (90$\%$) confidence level.

Publisher URL: http://arxiv.org/abs/1711.05637

DOI: arXiv:1711.05637v1

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.