<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production through resolved photon processes at <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>e</mi></mrow><mrow><mi>−</mi></mrow></msup></mrow></math></span> colliders

R. M. Godbole; D. Indumathi; M. Krämer

doi:10.1103/PhysRevD.65.074003

$J / ψ$ production through resolved photon processes at $e^{+} e^{-}$ colliders

R. M. Godbole, D. Indumathi, and M. Krämer

Phys. Rev. D 65, 074003 – Published 28 February 2002

Abstract

We consider $J / ψ$ photoproduction in $e^{+} e^{-}$ as well as linear photon colliders. We find that the process is dominated by the resolved photon channel. Both the once-resolved and twice-resolved cross sections are sensitive to (different combinations of) the color octet matrix elements. Hence, this may be a good testing ground for color octet contributions in NRQCD. On the other hand, the once-resolved $J / ψ$ production cross section, particularly in a linear photon collider, is sensitive to the gluon content of the photon. Hence these cross sections can be used to determine the parton distribution functions, especially the gluon distribution, in a photon, if the color octet matrix elements are known.