Erratum to: “A QCD-analysis for radiative decays of ϒ into f2(1270)”
نویسندگان
چکیده
منابع مشابه
A QCD - Analysis for Radiative Decays of Υ into f
We perform a QCD analysis for the radiative decay of a heavy 3 S 1 quarko-nium into the tensor meson f 2 (1270). We make an attempt to separate the nonperturbative effect related to the quarkonium and that related to the ten-sor meson, the former is represented by NRQCD matrix elements, while the later is parameterized by distribution amplitudes of gluons in the tensor me-son at twist-2 level a...
متن کاملQCD Corrections to Radiative Υ Decays
We have calculated the next-to-leading order perturbative QCD corrections to the photon energy spectrum in radiative Υ decays. The higher-order corrections significantly modify the shape of the spectrum, in particular at large photon energies, and thereby reduce the discrepancy between experimental data and previous leading-order predictions. The next-to-leading order calculation of the photon ...
متن کاملA QCD - Analysis for Radiative Decays of Υ into f 2 ( 1270 )
We perform a QCD analysis for the radiative decay of a heavy 3 S 1 quarko-nium into the tensor meson f 2 (1270). We make an attempt to separate the nonperturbative effect related to the quarkonium and that related to the ten-sor meson, the former is represented by NRQCD matrix elements, while the later is parameterized by distribution amplitudes of gluons in the tensor me-son at twist-2 level a...
متن کاملOctet contributions in radiative Υ decays
The standard Non-Relativistic QCD (NRQCD) factorization [1] (operator product expansion) breaks down at the end-point region of the photon spectrum in semi-inclusive radiative decays of heavy quarkonium; this is due to the fact that collinear degrees of freedom, that are relevant in this kinematic situation, are not included in NRQCD. A proper effective field theory treatment of the end-point r...
متن کاملHIGHER-ORDER CORRECTIONS TO RADIATIVE Υ DECAYS a
Recent advances in the theoretical description of radiative Υ decays are reviewed, including the calculation of next-to-leading order QCD corrections to the photon spectrum.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2001
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(01)00364-9