Splitting the gluon?
نویسندگان
چکیده
منابع مشابه
The gluon splitting function at moderately small x
It is widely believed that at small x, the BFKL resummed gluon splitting function should grow as a power of 1/x. But in several recent calculations it has been found to decrease for moderately small-x before eventually rising. We show that this 'dip' structure is a rigorous feature of the P gg splitting function for sufficiently small α s , the minimum occurring formally at log 1/x ∼ 1/ √ α s. ...
متن کاملMEASUREMENT OF THE PROBABILITY FOR GLUON SPLITTING INTO bb̄ IN Z DECAYS
We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g → bb̄, in hadronic Z decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or b̄ jets. The...
متن کاملImproved measurement of the probability for gluon splitting into bb̄ in Z0 decays
We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ ...
متن کاملA Measurement of the Gluon Splitting Rate into cc̄ Pairs in Hadronic Z Decays
The rate of gluon splitting into c¯ c pairs in hadronic Z decays is measured using the data sample collected by ALEPH from 1991 to 1995. The selection is based on the identification of leptons (electrons and muons) originating from semileptonic charm decays, and on the topological properties of signal events. The result derived from the selected sample is g c¯ c = (3.26 ± 0.23(stat) ± 0.42(syst...
متن کاملIMPROVED MEASUREMENT OF THE PROBABILITY FOR GLUON SPLITTING INTO bb̄ IN Z DECAYS
We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2005
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.72.054007