The X(3872) at CDF II

Abstract

Last year's X(3872) discovery was confirmed with the CDF II detector in pbarp collisions. We measure its mass to be $3871.3\pm 0.7\pm 0.4MeV/c2$. The source of X-mesons in the large CDF sample is resolved by studying their vertex displacement. We find $16.1\pm 4.9\pm 2.0$% of our X-sample comes from decays of b-hadrons, and the remainder from prompt sources: either direct production or by decay of (unknown) short-lived particles. The mix of production sources is similar to that observed for the psi(2S) charmonium state.

Meeting of the Division of Particles and Fields, UC Riverside, CA, 26-31 August 2004

References in corpus (3)

• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of the Narrow State $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV$

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• Precision Measurement of the X(3872) Mass in J/psi pi+ pi- Decays
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• Measurements of $\psi (2S)$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
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• Deciphering the $X(3872)$ via its polarization in prompt production at the CERN LHC
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• Observation of the B${}_{\mathrm{s}}^0$ $\to$ X(3872)$\varphi$ decay
• Theoretical Overview: The New Mesons
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