scholarly journals CHARMONIUM POLARIZATION AT THE TEVATRON

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 483-485
Author(s):  
JUNGIL LEE
Keyword(s):  
Factorization Approach ◽  
Qcd Factorization ◽  
Nonrelativistic Qcd

The current issues on the polarization of prompt J/ψ at the Tevatron is discussed. The prediction based on the nonrelativistic QCD factorization approach agrees with measurements from the CDF collaboration at intermediate values of pT, but disagrees at the large values of pT measured.

scholarly journals INCLUSIVE PRODUCTION OF FOUR CHARM HADRONS AT B-FACTORIES

2006 ◽  
Vol 21 (04) ◽  
pp. 922-925
Author(s):  
Daekyoung Kang ◽  
Jungil Lee
Keyword(s):  
Scattering Amplitude ◽  
Belle Collaboration ◽  
Inclusive Production ◽  
Hard Scattering ◽  
Factorization Approach ◽  
Qcd Factorization ◽  
Nonrelativistic Qcd ◽  
Theoretical Predictions ◽  
Perturbative Corrections

Measurements by the Belle Collaboration of the exclusive J/ψ + ηc and inclusive [Formula: see text] productions in e+e- annihilation differ substantially from theoretical predictions based on the nonrelativistic QCD factorization approach. In order to test if such a discrepancy is originated from the large perturbative corrections to the hard-scattering amplitude, we study inclusive production of four charm hadrons in e+e- annihilation at B factories.

scholarly journals ηcProduction at the LHC Challenges Nonrelativistic QCD Factorization

2015 ◽  
Vol 114 (9) ◽  
Author(s):  
Mathias Butenschoen ◽  
Zhi-Guo He ◽  
Bernd A. Kniehl
Keyword(s):  
Qcd Factorization ◽  
Nonrelativistic Qcd

scholarly journals Contributions from $${\Phi }_{B2}$$ to the B $${\rightarrow }$$ PP decays within the QCD factorization

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
Qin Chang ◽  
Lili Chen ◽  
Yunyun Zhang ◽  
Junfeng Sun ◽  
Yueling Yang
Keyword(s):  
Theoretical Calculation ◽  
Measurement Precision ◽  
Distribution Amplitude ◽  
Factorization Approach ◽  
Weak Decays ◽  
Qcd Factorization ◽  
Pseudoscalar Mesons

AbstractWith the potential for the improvements of measurement precision, the refinement of theoretical calculation on hadronic B weak decays is necessary. In this paper, we study the contributions of B mesonic distribution amplitude $${\Phi }_{B2}$$ΦB2 within the QCD factorization approach, and find that $${\Phi }_{B2}$$ΦB2 contributes to only the nonfactorizable annihilation amplitudes for the B$${\rightarrow }$$→PP decays (P denotes the ground SU(3) pseudoscalar mesons). Although small, the $${\Phi }_{B2}$$ΦB2 contributions might be helpful for improving the performance of the QCD factorization approach, especially for the pure annihilation $$B_{d}$$Bd$${\rightarrow }$$→$$K^{+}K^{-}$$K+K- and $$B_{s}$$Bs$${\rightarrow }$$→$${\pi }^{+}{\pi }^{-}$$π+π- decays.

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