Resumming the color-octet contribution to radiative Y decay

Christian W. Bauer, Cheng Wei Chiang, Sean P Fleming, Adam K. Leibovich, Ian Low

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

At the upper end point of the photon energy spectrum in Y→Xγ, 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 languageEnglish (US)
Article number114014
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume64
Issue number11
StatePublished - Dec 1 2001
Externally publishedYes

Fingerprint

octets
Structure-function
Decay
End point
Energy Spectrum
logarithms
color
Logarithm
energy spectra
decay
Effective Field Theory
Point Spectrum
Collinear
Renormalization Group
Breakdown
Counting
Kinematics
cones
counting
Photon

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Resumming the color-octet contribution to radiative Y 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, 114014, 01.12.2001.

Research output: Contribution to journalArticle

Bauer, Christian W. ; Chiang, Cheng Wei ; Fleming, Sean P ; Leibovich, Adam K. ; Low, Ian. / Resumming the color-octet contribution to radiative Y decay. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2001 ; Vol. 64, No. 11.
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