Study of B<sub>s</sub><SUP>0</SUP> → J/ψπ<SUP>+</SUP>π<SUP>-</SUP>K<SUP>+</SUP>K<SUP>-</SUP> decays

Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 956 more authors) (2021) Study of B<sub>s</sub><SUP>0</SUP> → J/ψπ<SUP>+</SUP>π<SUP>-</SUP>K<SUP>+</SUP>K<SUP>-</SUP> decays. JOURNAL OF HIGH ENERGY PHYSICS, 02 (2). 024-.

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The decays $B^0_s \rightarrow J/\psi \pi^+\pi^- K^+ K^-$ are studied using a data set corresponding to an integrated luminosity of 9fb$^{-1}$, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13TeV. The decays $B^0_s \rightarrow J/\psi K^{\ast0} \bar{K}^{\ast0}$ and $B^0_s \rightarrow \chi_{c1}(3872)K^+K^-$, where the $K^+K^-$ pair does not originate from a $\phi$ meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate $\chi_{c1}(3872)\phi$, $J/\psi K^{\ast0}\bar{K}^{\ast0}$, $\psi(2S)\phi$ and $\chi_{c1}(3872)K^+K^-$ states are reported. A structure, denoted as $X(4740)$, is observed in the $J/\psi\phi$ mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be \begin{eqnarray*} m_{X(4740)} & = & 4741 \pm 6 \pm 6\,{\mathrm{MeV}}/c^2 \,, \\ \Gamma_{X(4740)} & = & 53 \pm 15 \pm 11\,{\mathrm{MeV}} \,, \end{eqnarray*} where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the $B^0_s$ meson is performed and gives a value of $$ m_{B^0_s} = 5366.98 \pm 0.07 \pm 0.13\,{\mathrm{MeV}}/c^2\,. $$

Item Type: Article
Additional Information: 32 pages, 10 figures; All figures and tables, along with any supplementary material and additional information, are available at (LHCb public pages)"
Uncontrolled Keywords: B physics, Branching fraction, Hadron-Hadron scattering (experiments), Quarkonium, Spectroscopy
Depositing User: Symplectic Admin
Date Deposited: 24 Feb 2021 14:30
Last Modified: 16 Oct 2023 18:01
DOI: 10.1007/JHEP02(2021)024
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