Testing quarkonium production with photoproduced [Formula presented]

Journal Article (Journal Article)

I compute the leading color-octet contributions to the process [Formula presented] within the nonrelativistic QCD (NRQCD) factorization formalism. In the color-singlet model, [Formula presented] can only be produced when the photon interacts through its structure function, while the color-octet mechanism allows for production of [Formula presented] via direct photon-gluon fusion. Resolved photon processes can be distinguished easily from direct photon processes by examining the fraction of the incident photon energy carried away by the [Formula presented] in the event. Therefore, this process provides a conclusive test of the color-octet mechanism. [Formula presented] production is particularly sensitive to the NRQCD matrix element which figures prominently in the fragmentation production of [Formula presented] at large [Formula presented] in hadron colliders. I also examine the predictions of the color evaporation model (CEM) of quarkonium production and find that this process can easily discriminate between the NRQCD factorization formalism and the CEM. © 1997 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Mehen, T

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 55 / 7

Start / End Page

  • 4338 - 4343

Electronic International Standard Serial Number (EISSN)

  • 1550-2368

International Standard Serial Number (ISSN)

  • 1550-7998

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.55.4338

Citation Source

  • Scopus