منابع مشابه
Constraining the Proton ’ s Gluon Density
We analyze the capability of charm production in deep-inelastic ep scattering at HERA to constrain the gluon distribution g(y, µ 2) of the proton. The dependence of the theoretical predictions for the charm structure function F c 2 on the mass factorization scale µ and the charm mass is investigated. We demonstrate that F c 2 is well suited for a rather clean and local gluon measurement at smal...
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The main focus of the physics program at PHENIX and STAR that makes use of RHIC’s polarized proton beams is to figure out how and if at all the gluons inside protons are polarized, or to put it another way, do the spin 1 gluons prefer to have their spins aligned or anti-aligned with the spin of the proton, or do they just not care? This question is an important part of the more general question...
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The theoretical predictions for prominent processes like gg → H or the t t̄ cross section still suffer from a rather large uncertainty stemming from the parton distributions functions (PDFs) in the proton, in particular from the gluon distribution. In view of the LHC with its large gluon luminosity, it is therefore important to analyse how present experiments can be used to constrain the gluon f...
متن کاملConstraining the Proton’s Gluon Density by Inclusive Charm Electroproduction at HERA
We analyze the capability of charm production in deep-inelastic ep scattering at HERA to constrain the gluon distribution g(y, μ) of the proton. The dependence of the theoretical predictions for the charm structure function F c 2 on the mass factorization scale μ and the charm mass is investigated. F c 2 seems to be well suited for a rather clean and local gluon measurement at small momentum fr...
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Spindle poles are discernible by light microscopy as the sites where microtubules converge at the ends of both mitotic and meiotic spindles. In most cell types centrosomes are present at spindle poles due to their dominant role in microtubule nucleation. However, in some specialized cell types microtubules converge into spindle poles in the absence of centrosomes. Thus, spindle poles in centros...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2015
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2015.10.088