H1 and ZEUS

QCD analysis with determination of alpha_s based on HERA inclusive and jet data (HERAPDF1.6)

Reference Preliminary DIS2011, April 2011
Document Conference paper or talk
Figures  (1)  (2)  (3a)  (3b)  (4)  (5)  (6)  (7a)  (7b)  (8)  (9)  (10)  (11)  (12)
Contact K. Nowak, A. Cooper
Abstract A NLO QCD PDF fit analysis with simultaneous determination of the strong coupling constant $\alpha_s(M_Z)$ is presented. The analysis is based on the same combined H1 and ZEUS inclusive DIS measurements as HERAPDF1.5 fit, together with jet measurements provided by both H1 and ZEUS collaborations. The inclusion of jet data in the analysis significantly reduces the correlation between the gluon parton density function and the strong coupling, improving the precision of the gluon PDF and providing an accurate determination of $\alpha_s(m_Z)$.
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