Impact of CLAS and COMPASS data on Polarized Parton Densities and Higher Twist

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dc.creatorLeader, Elliot
dc.creatorSidorov, Aleksander V.
dc.creatorStamenov, Dimiter B.
dc.date2006-12-28
dc.date2007-04-10
dc.date.accessioned2026-07-07T11:02:30Z
dc.date.available2026-07-07T11:02:30Z
dc.descriptionWe have re-analyzed the world data on inclusive polarized DIS including the very precise CLAS proton and deuteron data, as well as the latest COMPASS data on the asymmetry $A_1^d$, and have studied the impact of these data on polarized parton densities and higher twist effects. We demonstrate that the low $Q^2$ CLAS data improve essentially our knowledge of higher twist corrections to the spin structure function $g_1$, while the large $Q^2$ COMPASS data influence mainly the strange quark density. In our new analysis we find that a negative polarized gluon density, or one that changes sign as a function of x, cannot be ruled out from the present DIS data.
dc.descriptionVersion to be published in Phys. Rev. D., minor changes in the text, 2 figures and 2 references added
dc.identifierhttps://arxiv.org/abs/hep-ph/0612360
dc.identifierhttp://arxiv.org/abs/hep-ph/0612360
dc.identifierPhys.Rev.D75:074027,2007
dc.identifierdoi:10.1103/PhysRevD.75.074027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188269
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleImpact of CLAS and COMPASS data on Polarized Parton Densities and Higher Twist
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