Simulated spin-interference patterns in ρ(1450)→4π decays give a distinct azimuthal modulation for the π(1300)π channel, allowing its branching fraction to be extracted.
Coherent rho^0 Production in Ultra-Peripheral Heavy Ion Collisions
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abstract
The STAR collaboration reports the first observation of exclusive rho^0 photo-production, AuAu->AuAu rho^0, and rho^0 production accompanied by mutual nuclear Coulomb excitation, AuAu->Au*Au*rho^0, in ultra-peripheral heavy-ion collisions. The rho^0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at sqrt(s_NN)=130GeV agree with theoretical predictions treating rho^0 production and Coulomb excitation as independent processes.
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hep-ph 3representative citing papers
Improved tensor-pomeron model for π⁺π⁻ photoproduction and central exclusive production in pp collisions that accounts for different subenergies in the Drell-Söding contribution and yields larger cross sections with more skewed ρ⁰ lineshape.
A suppression factor R_G=0.85 is tuned to F2 and rho photoproduction data and used to predict observables for rho(2S), omega, and phi states via holographic wave functions in the dipole picture.
citing papers explorer
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Probing Quantum Numbers and Decay Branching Ratios of Exotic States via Entanglement-Enabled Spin Interference
Simulated spin-interference patterns in ρ(1450)→4π decays give a distinct azimuthal modulation for the π(1300)π channel, allowing its branching fraction to be extracted.
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Production of $\pi^{+}\pi^{-}$ pairs in diffractive photon-proton and in proton-proton collisions revisited, in particular concerning the Drell-S\"oding contribution
Improved tensor-pomeron model for π⁺π⁻ photoproduction and central exclusive production in pp collisions that accounts for different subenergies in the Drell-Söding contribution and yields larger cross sections with more skewed ρ⁰ lineshape.
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Coherent photoproduction of light vector mesons off nuclear targets in the dipole picture
A suppression factor R_G=0.85 is tuned to F2 and rho photoproduction data and used to predict observables for rho(2S), omega, and phi states via holographic wave functions in the dipole picture.