Observation of the narrow state $X(3872) \to J/\psi \pi^+ \pi^-$ in $\bar{p}p$ collisions at $\sqrt{s} = 1.96$ TeV - INSPIRE

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Observation of the narrow state $X(3872) \to J/\psi \pi^+ \pi^-$ in $\bar{p}p$ collisions at $\sqrt{s} = 1.96$ TeV

CDF

Collaboration

Dec, 2003

6 pages

Published in:

Phys.Rev.Lett. 93 (2004) 072001

e-Print:

hep-ex/0312021 [hep-ex]

DOI:

10.1103/PhysRevLett.93.072001

PDG:

{{\mathit \chi}_{{{c1}}}{(3872)}}

{{\mathit J / \psi}}{{\mathit X}}

Report number:

FERMILAB-PUB-03-393-E

Experiments:

FNAL-E-0830

View in:

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Abstract:

We report the observation of a narrow state decaying into

J/\psi\pi^+\pi^-

and produced in

220 pb^{-1}

of

\bar{p} p

collisions at

\sqrt{s}=1.96 TeV

in the CDF II experiment. We observe

730 \pm 90

decays. The mass is measured to be

3871.3 \pm 0.7 (stat) \pm 0.4 (syst) MeV/c2

, with an observed width consistent with the detector resolution. This is in agreement with the recent observation by the Belle Collaboration of the X(3872) meson.

Note:

6 pages, 2 figures: submitted to Phys Rev Lett Report-no: FERMILAB-PUB-03/393-E

14.40.Gx
12.39.Mk
meson resonances
meson hadronic decay
proton-proton inclusive interactions
high-energy elementary particle interactions
charm particles
anti-p p: colliding beams
anti-p p: inclusive reaction
narrow resonance: hadroproduction

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