NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS

THOMAS N. SHERRY

doi:10.1016/S0920-5632(02)01959-X

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS

THOMAS N. SHERRY

Mathematics

Research output: Chapter in Book or Conference Publication/Proceeding › Conference Publication › peer-review

Abstract

QCD contributions to the b -- ul(-)v(l) decay rate, which are known to two-loop order in the MS scheme, exhibit sufficient dependence on the renormalization mass mu to compromise phenomenological predictions for inclusive semileptonic B -- X-u processes. Such scale dependence is ameliorated by the renormalization-group (RG) extraction and summation of all leading and RG-accessible subleading logarithms occurring subsequent to two-loop order in the perturbative series. This optimal RG-improvement of the known portion of the perturbative series virtually eliminates mu-dependence as a source of theoretical uncertainty in the predicted semileptonic B -- X-u inclusive rate.

Original language	English (Ireland)
Title of host publication	Renormalization-mass scale dependence in QCD contributions to semileptonic b - u decay
Number of pages	4
Volume	115
DOIs	https://doi.org/10.1016/S0920-5632(02)01959-X
Publication status	Published - 1 Feb 2003

Authors (Note for portal: view the doc link for the full list of authors)

Authors
Ahmady, MR,Chishtie, FA,Elias, V,Fariborz, AH,McKeon, DGC,Sherry, TN,Steele, TG

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10.1016/S0920-5632(02)01959-X

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abstract = "QCD contributions to the b -- ul(-)v(l) decay rate, which are known to two-loop order in the MS scheme, exhibit sufficient dependence on the renormalization mass mu to compromise phenomenological predictions for inclusive semileptonic B -- X-u processes. Such scale dependence is ameliorated by the renormalization-group (RG) extraction and summation of all leading and RG-accessible subleading logarithms occurring subsequent to two-loop order in the perturbative series. This optimal RG-improvement of the known portion of the perturbative series virtually eliminates mu-dependence as a source of theoretical uncertainty in the predicted semileptonic B -- X-u inclusive rate.",

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N2 - QCD contributions to the b -- ul(-)v(l) decay rate, which are known to two-loop order in the MS scheme, exhibit sufficient dependence on the renormalization mass mu to compromise phenomenological predictions for inclusive semileptonic B -- X-u processes. Such scale dependence is ameliorated by the renormalization-group (RG) extraction and summation of all leading and RG-accessible subleading logarithms occurring subsequent to two-loop order in the perturbative series. This optimal RG-improvement of the known portion of the perturbative series virtually eliminates mu-dependence as a source of theoretical uncertainty in the predicted semileptonic B -- X-u inclusive rate.

AB - QCD contributions to the b -- ul(-)v(l) decay rate, which are known to two-loop order in the MS scheme, exhibit sufficient dependence on the renormalization mass mu to compromise phenomenological predictions for inclusive semileptonic B -- X-u processes. Such scale dependence is ameliorated by the renormalization-group (RG) extraction and summation of all leading and RG-accessible subleading logarithms occurring subsequent to two-loop order in the perturbative series. This optimal RG-improvement of the known portion of the perturbative series virtually eliminates mu-dependence as a source of theoretical uncertainty in the predicted semileptonic B -- X-u inclusive rate.

U2 - 10.1016/S0920-5632(02)01959-X

DO - 10.1016/S0920-5632(02)01959-X

M3 - Conference Publication

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BT - Renormalization-mass scale dependence in QCD contributions to semileptonic b - u decay

ER -

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS

Abstract

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