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

Mario Campanelli; Allan Geoffrey Clark; Monica D Onofrio; Yanwen Liu; Xin Wu; Andras Zsenei; Craig Blocker; Collaboration Cdf Ii; Lawrence Kirsch

doi:10.1103/PhysRevLett.93.072001

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

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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

Mario Campanelli, Allan Geoffrey Clark, Monica D Onofrio, Yanwen Liu, Xin Wu, Andras Zsenei, Craig Blocker, Collaboration Cdf Ii and Lawrence Kirsch

Physical review letters

12/05/2003

DOI: https://doi.org/10.1103/PhysRevLett.93.072001

Abstract

Central muon system (CMU)

Central outer tracker (COT)

Experiment

Gaussian noise (electronic)

Magnetic field effects

Mass distribution

Maximum likelihood estimation

Nuclear Experiment

Poisson distribution

Protons

Quantum theory

Signal detection

Signal to noise ratio

Silicon

Superlayers

Atomic Physics

High Energy Physics

Optimization

Polynomials

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.

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Title: Observation of the Narrow State $X(3872)\to J/\psi\pi^{+}\pi^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV
Creators: Mario Campanelli
Allan Geoffrey Clark
Monica D Onofrio
Yanwen Liu
Xin Wu
Andras Zsenei
Craig Blocker - Brandeis University, Martin A. Fisher School of Physics
Collaboration Cdf Ii
Lawrence Kirsch - Brandeis University, Martin A. Fisher School of Physics
Publication Details: Physical review letters
Identifiers: 9924091143301921
Academic Unit: Martin A. Fisher School of Physics
Language: English
Resource Type: Journal article

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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