NNLO QCD corrections to γ+ηc(ηb)\gamma + \eta_c(\eta_b) exclusive production in electron-positron collision

Oct 21, 2017
12 pages
Published in:
  • JHEP 01 (2018) 091
  • Published: Jan 19, 2018
e-Print:

Citations per year

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Abstract: (Springer)
Based on the NRQCD factorization formalism, we calculate the next-to-next-to-leading order QCD corrections to the heavy quarkonium ηc_{c}b_{b} ) production associated with a photon at electron-positron colliders. By matching the amplitudes calculated in full QCD theory to a series of operators in NRQCD, the short-distance coefficients up to NNLO QCD radiative corrections are determined. It turns out that the full set of master integrals that we obtained could be analytically expressed in terms of Goncharov Polylogarithms, integrals over polylogarithms and complete elliptic integrals, which mostly do not exist in the literature and could be employed in the analyses of other physical processes. In phenomenology, numerical calculations of NNLO K-factors and cross sections of e+^{+}e^{−} → γ + ηc_{c}b_{b} ) processes in BESIII and B-factory experiments are performed, which may stand as a test of the NRQCD higher order calculation while confronting to the data.
Note:
  • 12 pages, 5 firues
  • NLO Computations
  • QCD Phenomenology
  • quantum chromodynamics: nonrelativistic
  • factorization
  • quantum chromodynamics: correction
  • quantum chromodynamics: radiative correction
  • higher-order: 2
  • quarkonium: heavy
  • exclusive production
  • master integral