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2006•International Journal of Modern Physics AOpen access

THE X(3872) MESON AND "EXOTIC" SPECTROSCOPY AT CDF II — OR NOT? —

G. Bauer

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Abstract

A spate of remarkable new hadrons reported in 2003 may lead to unequivocal proof of states beyond conventional [Formula: see text] and qqq structure. Claimed baryonic states Θ+, Φ, and [Formula: see text] would consist of five quarks, and new [Formula: see text]-states and/or X(3872) might contain four quarks. I review efforts to search for and study this "new" spectroscopy in [Formula: see text]-collisions with the CDF II detector. Pentaquark searches are negative, and no evidence for exotic analogs of DsJ-states was found. CDF has confirmed the X(3872). My main focus is the production and decay properties of the X(3872), and its possible interpretations.

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A spate of remarkable new hadrons reported in 2003 may lead to unequivocal proof of states beyond conventional [Formula: see text] and qqq structure. Claimed baryonic states Θ+, Φ, and [Formula: see text] would consist of five quarks, and new [Formula: see text]-states and/or X(3872) might contain four quarks. I review efforts to search for and study this "new" spectroscopy in [Formula: see text]-collisions with the CDF II detector. Pentaquark searches are negative, and no evidence for exotic analogs of DsJ-states was found. CDF has confirmed the X(3872). My main focus is the production and decay properties of the X(3872), and its possible interpretations.

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Available abstract

A spate of remarkable new hadrons reported in 2003 may lead to unequivocal proof of states beyond conventional [Formula: see text] and qqq structure. Claimed baryonic states Θ+, Φ, and [Formula: see text] would consist of five quarks, and new [Formula: see text]-states and/or X(3872) might contain four quarks. I review efforts to search for and study this "new" spectroscopy in [Formula: see text]-collisions with the CDF II detector. Pentaquark searches are negative, and no evidence for exotic analogs of DsJ-states was found. CDF has confirmed the X(3872). My main focus is the production and decay properties of the X(3872), and its possible interpretations.

Key concepts: Pentaquark, X(3872), Physics, Exotic hadron, Particle physics, Spectroscopy, Meson, Quark

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