Observation of a narrow mass state decaying into $\Upsilon(1S)+\gamma$ in $p\bar p$ collisions at $\sqrt{s}=1.96$ $\text{TeV}$
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2012
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American Physical Society
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Using data corresponding to an integrated luminosity of 1.3fb -1, we observe a narrow mass state decaying into Υ(1S)+γ, where the Υ(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard deviations. The mass of the state is centered at 10.551±0.014(stat) ±0.017(syst)GeV/c2, which is consistent with that of the state recently observed by the ATLAS Collaboration.
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Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Alexeev, G. D., . . . Zivkovic, L. (2012). Observation of a narrow mass state decaying into $\Upsilon(1S)+\gamma$ in $p\bar p$ collisions at $\sqrt{s}=1.96$ $\text{TeV}$. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(3), 031103. http://dx.doi.org/10.1103/PhysRevD.86.031103
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© 2012 American Physical Society.
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