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Gluon fragmentation into quarkonium at next-to-leading order
Pierre Artoisenet, Eric Braaten
We present the first calculation at next-to-leading order (NLO) in of a fragmentation function into quarkonium whose form at leading order is a nontrivial function of , na…
Association of Atoms into Universal Dimers using an Oscillating Magnetic Field
Christian Langmack, D. Hudson Smith, Eric Braaten
In a system of ultracold atoms near a Feshbach resonance, pairs of atoms can be associated into universal dimers by an oscillating magnetic field with frequency near that determine…
Born-Oppenheimer Approximation for the XYZ Mesons
Eric Braaten, Christian Langmack, D. Hudson Smith
Many of the XYZ mesons discovered in the last decade can be identified as bound states in Born-Oppenheimer (B-O) potentials for a heavy quark and antiquark. They include quarkonium…
Selection Rules for Hadronic Transitions of XYZ Mesons
Eric Braaten, Christian Langmack, D. Hudson Smith
Many of the XYZ mesons discovered in the last decade can be identified as bound states of a heavy quark and antiquark in Born-Oppenheimer (B-O) potentials defined by the energy of…
J/psi and Upsilon Polarization in Hadronic Production Processes
Eric Braaten, James Russ
Both charm and bottom quarks form nonrelativistic bound states analogous to positronium. The J/psi and psi(2S) charmonium states and the first three Upsilon(nS) bottomonium states,…