Diffraction and precise QCD measurements at HERA

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Diffraction and precise QCD measurements at HERA. Rencontres de Moriond QCD 2012 M.Kapishin , JINR on behalf of the H1 and ZEUS Collaborations Jet cross sections in DIS and γ p and α s (M Z ) Jets in HERAPDF fits New charm data in DIS Combined diffractive cross sections - PowerPoint PPT Presentation

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M.KapishinDiffraction and precise QCD measurements at HERA1Diffraction and precise QCD measurements at HERA

Rencontres de Moriond QCD 2012M.Kapishin, JINR on behalf of the H1 and ZEUS Collaborations Jet cross sections in DIS and p and s(MZ) Jets in HERAPDF fits New charm data in DIS Combined diffractive cross sections Tests of diffractive PDFs with dijets in DIS Diffractive heavy vector meson production

M.Kapishin1M.KapishinDiffraction and precise QCD measurements at HERA2Inclusive and Jet production in DIS Inclusive LO DIS: ~ q(x,f) High PT Jets in the Breit frame in LO DIS: jet~ s(r)(cgg(x,f)+cqq(x,f)) QCD fits to inclusive NC and CC DIS data: s and gluon PDF are strongly correlated, sensitivity to gluon in NLO via scaling violations Jet data are sensitive to s and gluon PDF already in LO Combined inclusive DIS and Jet data reduce correlation between s and gluon PDF

M.Kapishin2M.KapishinDiffraction and precise QCD measurements at HERA3Jets in p

Direct photo-production Resolved photo-production~s~s2

Q2~0 GeV2, hard scale PT jet in lab frameDirect sensitivity to s, gluon and photon PDFsn-jet production in LO ~sn-1 (direct) and sn (resolved)x distinguish between resolved photon (x