Investigation of the dynamics of gluon distributions in the production of heavy quarks and quarkonia at the LEP2 collider
- Moscow State University, Institute of Nuclear Physics (Russian Federation), E-mail: lipatov@theory.sinp.msu.ru
The inclusive production of heavy quarks and quarkonia in photon-photon collisions at the LEP2 collider is considered within the semihard (k{sub T}-factorization) QCD approach. The dependence of the total and differential cross sections for the production of heavy (c and b) quarks and D* and J/{psi} mesons on the choice of unintegrated gluon distribution is studied. The transition of a cc-bar charmed pair to observed J/{psi} mesons is described on the basis of the color-singlet model. The results of the calculations are compared with currently available experimental data obtained by the L3, OPAL, ALEPH, and DELPHI Collaborations. It is shown that the polarization properties of J/{psi} mesons at the LEP2 collider are sensitive to the behavior of unintegrated gluon distributions. This means that experimental investigations of the polarization properties of quarkonia in photon-photon collisions may provide a direct test of the dynamics of gluon distributions in the photon.
- OSTI ID:
- 21075980
- Journal Information:
- Physics of Atomic Nuclei, Vol. 69, Issue 9; Other Information: DOI: 10.1134/S1063778806090146; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
B QUARKS
C QUARKS
CHARMED MESONS
COLOR MODEL
D MESONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
FACTORIZATION
GLUONS
J PSI-3097 MESONS
LEP STORAGE RINGS
PHOTON-PHOTON INTERACTIONS
PHOTONS
POLARIZATION
QUANTUM CHROMODYNAMICS
QUARKONIUM
T QUARKS
TOTAL CROSS SECTIONS