Electroweak production of hybrid mesons in a Flux-Tube simulation of Lattice QCD

Details Electroweak production of hybrid mesons in a Flux-Tube simulation of Lattice QCD Electroweak production of hybrid mesons in a Flux-Tube simulation of Lattice QCD

2003-04-25

arxiv.org/abs/hep-ph/0304243v2

Phys.Rev.Lett. 91 (2003) 142001

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages

Scientific paper

10.1103/PhysRevLett.91.142001

We make the first calculation of the electroweak couplings of hybrid mesons to conventional mesons appropriate to photoproduction and to the decays of $B$ or $D$ mesons. $E1$ amplitudes are found to be large and may contribute in charge exchange $\gamma p \to n H^+$ allowing production of (amongst others) the charged $1^{-+}$ exotic hybrid off $a_2$ exchange. Axial hybrid meson photoproduction is predicted to be large courtesy of $\pi$ exchange, and its strange hybrid counterpart is predicted in $B \to \psi K_H(1^+)$ with $b.r. \sim 10^{-4}$. Higher multipoles, and some implications for hybrid charmonium are briefly discussed.

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