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000631504 005__ 20250708212236.0
000631504 0247_ $$2arXiv$$aarXiv:2506.22616
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000631504 088__ $$2arXiv$$aarXiv:2506.22616
000631504 1001_ $$0P:(DE-H253)PIP1088838$$aYang, Yewon$$b0$$udesy
000631504 245__ $$aA novel phenomenological approach to total cross-section measurements at the LHC
000631504 260__ $$c2025
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000631504 500__ $$aThis is *not* a CMS paper, but a phenomenology paper
000631504 520__ $$aWe propose a novel, data-driven method for determining total charm cross sections in proton-proton collisions by extrapolating measured fiducial cross sections without assuming any particular fragmentation model. In this way, the method accounts for the recently observed charm fragmentation non-universality at the LHC through a data-driven extrapolation function called ddFONLL. Applied to $D^0$ production at 5 and 13 TeV, this approach yields total charm cross sections that fully incorporate fragmentation non-universality. The results, which differ significantly from previous universality-based estimates, are consistent with NNLO QCD predictions and enable direct comparisons free from fragmentation assumptions. We use this to evaluate the sensitivity of total cross-section measurements to parton distribution functions and the charm-quark mass. An outlook is given on the potential of further expanding the use of the ddFONLL method.
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000631504 7001_ $$0P:(DE-H253)PIP1002698$$aGeiser, Achim$$b1$$eCorresponding author$$udesy
000631504 7001_ $$0P:(DE-H253)PIP1003775$$aMoch, Sven-Olaf$$b2
000631504 7001_ $$0P:(DE-H253)PIP1007500$$aZenaiev, Oleksandr$$b3
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000631504 9131_ $$0G:(DE-HGF)POF4-611$$1G:(DE-HGF)POF4-610$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lMatter and the Universe$$vFundamental Particles and Forces$$x0
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