Observation of the B_s^0 → J/psi phi phi decay
<p>Observation of the <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕϕ</i> decay</p> <p>The <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i&g...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
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Springer Verlag
2016
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| Shrnutí: | <p>Observation of the <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕϕ</i> decay</p> <p>The <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕϕ</i> decay is observed in <i>pp</i> collision data corresponding to an integrated luminosity of 3 fb<sup>−1</sup> recorded by the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first observation of this decay channel, with a statistical significance of 15 standard deviations. The mass of the <i>B</i><sub><i>s</i></sub><sup>0</sup> meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c<sup>2</sup>. The branching fraction ratio 𝓑(<i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕϕ</i>)/𝓑(<i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕ</i>) is measured to be 0.0115 ± 0.0012 <sub>−0.0009</sub><sup style="position: relative; left: -3.3em;">+0.0005</sup>. In both cases, the first uncertainty is statistical and the second is systematic. No evidence for non-resonant <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψϕK</i><sup>+</sup><i>K</i><sup>−</sup> or <i>B</i><sub><i>s</i></sub><sup>0</sup> → <i>J</i>/<i>ψK</i><sup>+</sup><i>K</i><sup>−</sup><i>K</i><sup>+</sup><i>K</i><sup>−</sup> decays is found. </p> |
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