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Road to CTEQ7. J. Huston CTEQ meeting. Roadmap. CTEQ6 was published in 2002, followed by CTEQ6.1 in 2003 Pavel has given you a review of CTEQ6.6 which will debut in a paper to be released shortly What will be different about CTEQ7? for the first time, NNLO pdf’s from CTEQ as well as NLO

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Road to cteq7

Road to CTEQ7

J. Huston

CTEQ meeting


Roadmap
Roadmap

  • CTEQ6 was published in 2002, followed by CTEQ6.1 in 2003

  • Pavel has given you a review of CTEQ6.6 which will debut in a paper to be released shortly

  • What will be different about CTEQ7?

    • for the first time, NNLO pdf’s from CTEQ as well as NLO

      • much NNLO/NLO phenomenology to do

    • this is primarily the work of Liang and Pavel who will publish a separate paper on NNLO

    • inclusion of as much Tevatron data (and all updated HERA data) as possible

    • hope is that CTEQ7 will be used for comparison to first LHC data


Inclusive jets in run ii
Inclusive jets in Run II

  • Much more luminosity than available in Run I…and systematic errors comparable or smaller

  • Over a wider rapidity range than CDF had in Run I


Inclusive jets
Inclusive jets

…but

statistical

errors are

tiny

PDF uncertainties in some rapidity regions larger than systematic

uncertainties; potential for reducing pdf uncertainties in CTEQ7

Systematic errors can adjust most of the shape differences above


W asymmetry
W asymmetry

  • Here is a new CDF result for the W asymmetry in which the 4-vector of the W is reconstructed (weighting the two possible longitudinal momenta solutions of the neutrino)

  • Results should be directly comparable to NLO predictions since acceptance corrections done with [email protected]

  • Treat each systematic error as correlated


Asymmetry prediction using cteq6
Asymmetry prediction using CTEQ6

…from CDF authors

NLO = 0.650088

NLO = 0.539738

NLO = 0.44195

NLO = 0.375927

NLO = 0.321702

NLO = 0.275977

NLO = 0.23394

NLO = 0.19301

NLO = 0.153693

NLO = 0.117165

NLO = 0.0845064

NLO = 0.0517591

NLO = 0.0151878


Cdf dsigma dy
CDF: dsigma/dy

  • 5 sources of syst error; each correlated as function of y

Good agreement with CTEQ6.1

Similar result from D0


Cteq7
CTEQ7

  • Most of work has gone on at MSU

    • which includes Washington and Taiwan

    • and I can not overestimate the contributions of Pavel and Liang

  • We invite people who would like to contribute to volunteer

    • and with what they will be working on

  • Timescale is on the order of 6 months

    • MSTW has already shown results from new pdf’s that includes most of this data

    • this involves a strong commitment, i.e. this should be one of primary physics projects for participants during this time interval


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