NLO QCD Corrections for $J/\psi+ c + \bar{c}$ Production in Photon-Photon Collision - INSPIRE

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NLO QCD Corrections for $J/\psi+ c + \bar{c}$ Production in Photon-Photon Collision

Zi-Qiang Chen
(
- Beijing, GUCAS
)
,
Long-Bin Chen
(
- Beijing, GUCAS and
- CAS, CEPP, Beijing
)
,
Cong-Feng Qiao
(
- Beijing, GUCAS and
- CAS, CEPP, Beijing
)

Aug 22, 2016

5 pages

Published in:

Phys.Rev.D 95 (2017) 3, 036001

Published: Feb 6, 2017

e-Print:

1608.06231 [hep-ph]

DOI:

10.1103/PhysRevD.95.036001

View in:

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Abstract: (APS)

The γ+γ→J/ψ+c+c¯ inclusive process is an extremely important subprocess in J/ψ production via photon-photon scattering, like at LEPII or various types of future electron-positron colliders. In this work we perform the next-to-leading order (NLO) QCD corrections to this process in the framework of nonrelativistic QCD (NRQCD) factorization formalism, the first NLO calculation for two projectiles to the 3-body quarkonium inclusive production process. By setting the center-of-mass energy at LEPII, the s=197 GeV, we conduct analyses of the pt2 distribution and total cross section of this process at the NLO accuracy. It turns out that the total cross section is moderately enhanced by the NLO correction with a K factor of about 1.46, and hence the predicted J/ψ inclusive productivity is increased while the DELPHI data still overshoot the theoretical prediction. At the future Circular Electron-Positron Collider, the NLO corrections are found to be more significant, with a K factor of about 1.76.

Note:

expressions are properly modified

13.66.Bc
12.38.Bx
14.40.Pq
photon photon: scattering
J/psi(3100): production
J/psi(3100): transverse momentum
transverse momentum: momentum spectrum
charm: pair production
total cross section
quantum chromodynamics: correction

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