Abstract
At the upper end point of the photon energy spectrum in (Formula presented) the standard NRQCD power counting breaks down and the OPE gives rise to color-octet structure functions. Furthermore, in this kinematic regime large Sudakov logarithms appear in the octet Wilson coefficients. The end point spectrum can be treated consistently within the framework of a recently developed effective field theory of collinear and soft particles. Here we show that within this approach the octet structure functions arise naturally and that Sudakov logarithms can be summed using the renormalization group equations. We derive an expression for the resummed energy spectrum and, using a model light cone structure function, investigate the phenomenological importance of the resummation.
| Original language | English (US) |
|---|---|
| Number of pages | 1 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 64 |
| Issue number | 11 |
| DOIs | |
| State | Published - Jan 1 2001 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)
Cite this
Resumming the color-octet contribution to radiative [Formula Presented] decay. / Bauer, Christian W.; Chiang, Cheng Wei; Fleming, Sean P; Leibovich, Adam K.; Low, Ian.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 64, No. 11, 01.01.2001.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Resumming the color-octet contribution to radiative [Formula Presented] decay
AU - Bauer, Christian W.
AU - Chiang, Cheng Wei
AU - Fleming, Sean P
AU - Leibovich, Adam K.
AU - Low, Ian
PY - 2001/1/1
Y1 - 2001/1/1
N2 - At the upper end point of the photon energy spectrum in (Formula presented) the standard NRQCD power counting breaks down and the OPE gives rise to color-octet structure functions. Furthermore, in this kinematic regime large Sudakov logarithms appear in the octet Wilson coefficients. The end point spectrum can be treated consistently within the framework of a recently developed effective field theory of collinear and soft particles. Here we show that within this approach the octet structure functions arise naturally and that Sudakov logarithms can be summed using the renormalization group equations. We derive an expression for the resummed energy spectrum and, using a model light cone structure function, investigate the phenomenological importance of the resummation.
AB - At the upper end point of the photon energy spectrum in (Formula presented) the standard NRQCD power counting breaks down and the OPE gives rise to color-octet structure functions. Furthermore, in this kinematic regime large Sudakov logarithms appear in the octet Wilson coefficients. The end point spectrum can be treated consistently within the framework of a recently developed effective field theory of collinear and soft particles. Here we show that within this approach the octet structure functions arise naturally and that Sudakov logarithms can be summed using the renormalization group equations. We derive an expression for the resummed energy spectrum and, using a model light cone structure function, investigate the phenomenological importance of the resummation.
UR - http://www.scopus.com/inward/record.url?scp=85037891416&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037891416&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.64.114014
DO - 10.1103/PhysRevD.64.114014
M3 - Article
AN - SCOPUS:85037891416
VL - 64
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 11
ER -