Abstract
A study of B 0 s → η c ϕ and B 0 s → η c π + π − decays is performed using pp collision data corresponding to an integrated luminosity of 3.0 fb−1, collected with the LHCb detector in Run 1 of the LHC. The observation of the decay B 0 s → η c ϕ is reported, where the η c meson is reconstructed in the \( p\overline{p} \), K + K − π + π −, π + π − π + π − and K + K − K + K − decay modes and the ϕ(1020) in the K + K − decay mode. The decay B 0 s → J/ψϕ is used as a normalisation channel. Evidence is also reported for the decay B 0 s → η c π + π −, where the η c meson is reconstructed in the \( p\overline{p} \) decay mode, using the decay B 0 s → J/ψπ + π − as a normalisation channel. The measured branching fractions are
where in each case the first uncertainty is statistical, the second systematic and the third uncertainty is due to the limited knowledge of the external branching fractions.
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ArXiv ePrint: 1702.08048
Deceased (J. Blouw, I. Raniuk, P. Rodriguez Perez)
C. Baesso, M. Cruz Torres and C. Göbel are associated to Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
J. He, X. Lyu, D. Vieira, Y. Zheng, L. Sun, Y. Xie, H. Yin and J. Yu are associated to Center for High Energy Physics, Tsinghua University, Beijing, China
D. A. Milanes, I. A. Monroy and J. A. Rodriguez Lopez are associated to LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
O. Grünberg, M. Heß, H. Viemann and R. Waldi are associated to Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
T. Likhomanenko, A. Malinin, O. Morgunova, A. Nogay, A. Petrov and V. Shevchenko are associated to Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
L. M. Garcia Martin, F. Martinez Vidal, A. Oyanguren, C. Remon Alepuz, P. Ruiz Valls and C. Sanchez Mayordomo are associated to ICCUB, Universitat de Barcelona, Barcelona, Spain
C. J. G. Onderwater is associated to Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
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The LHCb collaboration., Aaij, R., Adeva, B. et al. Observation of the decay B 0 s → η c ϕ and evidence for B 0 s → η c π + π − . J. High Energ. Phys. 2017, 21 (2017). https://doi.org/10.1007/JHEP07(2017)021
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DOI: https://doi.org/10.1007/JHEP07(2017)021