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Road to CTEQ7

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

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  1. Road to CTEQ7 J. Huston CTEQ meeting

  2. 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

  3. 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

  4. 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

  5. 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 MC@NLO • Treat each systematic error as correlated

  6. 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

  7. CDF: dsigma/dy • 5 sources of syst error; each correlated as function of y Good agreement with CTEQ6.1 Similar result from D0

  8. 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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