Journal Article

PUBDB-2026-01068

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A novel phenomenological approach to total charm cross-section measurements at the LHC

Yang, Y. (Corresponding author)DESY* ; Geiser, A.DESY* ; Moch, S.-O.Extern* ; Zenaiev, O.Extern*

2026
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-026-15423-7  doi:10.3204/PUBDB-2026-01068

Report No.: DESY-25-091; arXiv:2506.22616

Abstract: We 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. The recently observed charm fragmentation non-universality at the LHC experimentally establishes strongly increased baryon production fractions and correspondingly decreased meson production fractions compared to electron–positron collisions, with a very significant $p_T$ dependence. The novel method accounts for this non-universality and its $p_T$-dependence 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 the fragmentation non-universality and increase significantly compared to the previous measurements still based on fragmentation universality. The results 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.

Note: Acknowledgements The work of O.Z. has received funding through the MSCA4Ukraine project, which is funded by the European Union.

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Contributing Institute(s):

1. Uni Hamburg / Theorie (UNI/TH)
2. LHC/CMS Experiment (CMS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. MSCA4Ukraine - MSCA4Ukraine (101101923) (101101923)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2026

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Yang, Y.DESY* ; Geiser, A. (Corresponding author)DESY* ; Moch, S.-O.Extern* ; Zenaiev, O.Extern*
A novel phenomenological approach to total cross-section measurements at the LHC
(2025) [10.3204/PUBDB-2025-02016]2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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