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Vector meson pair production in two-photon collisions near threshold | | Jonathan L. Rosner
; | | Date: |
27 Apr 2004 | | Journal: | Phys.Rev. D70 (2004) 034028 | | Subject: | hep-ph | | Abstract: | The cross sections for several $gamma gamma o VV$ processes exhibit strong enhancements near threshold, where $V$ denotes a vector meson. The pattern of these enhancements is not well understood; for example, $gamma gamma o
ho^0
ho^0$ shows an appreciable peak, while $gamma gamma o
ho^+
ho^-$ does not. Some possible mechanisms for this behavior are discussed. Tests are proposed involving production of systems containing heavier quarks, e.g., through the reaction $gamma gamma o J/psi
ho^0$. The importance of modeling $ell^+ ell^- pi^+ pi^-$ angular distributions in decays of threshold $J/psi
ho^0$ enhancements is illustrated by comparing the expected distributions for S-wave decays of scalar particles and P-wave decays of pseudoscalar particles. | | Source: | arXiv, hep-ph/0404245 | | Services: | Forum | Review | PDF | Favorites | |
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