New limits on intrinsic charm in the nucleon from global analysis of parton distributions

Jimenez-Delgado, P.; Hobbs, T. J.; Londergan, J. T.; Melnitchouk, W.

doi:10.1103/PhysRevLett.114.082002

Title: New limits on intrinsic charm in the nucleon from global analysis of parton distributions

Journal Article · Fri Feb 27 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.082002· OSTI ID:1171478

Jimenez-Delgado, P. ^[1]; Hobbs, T. J. ^[2]; Londergan, J. T. ^[3]; Melnitchouk, W. ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Indiana Univ., Bloomington, IN (United States); Univ. of Washington, Seattle, WA (United States)
Indiana Univ., Bloomington, IN (United States)

We present a new global QCD analysis of parton distribution functions, allowing for possible intrinsic charm (IC) contributions in the nucleon inspired by light-front models. The analysis makes use of the full range of available high-energy scattering data for Q² ≥ 1 GeV₂ and W² ≥ 3.5 GeV², including fixed-target proton and deuteron deep cross sections at lower energies that were excluded in previously global analyses. The expanded data set places more stringent constraints on the momentum carried by IC, with (x)_IC at most 0.5% (corresponding to an IC normalization of ~1%) at the 4σ level for Δ_X² = 1. We also assess the impact of older EMC measurements of F^c₂c at large x, which favor a nonzero IC, but with very large X² values.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: PHY-1205019; FG02-87ER40365; FG02-97ER41014; AC05-06OR23177; FG02-97ER-41014

OSTI ID:: 1171478

Alternate ID(s):: OSTI ID: 1180568

Report Number(s):: JLAB-THY-14-1931; DOE/OR/23177-3145; arXiv:1408.1708; PRLTAO; ArticleNumber: 082002; TRN: US1600760

Journal Information:: Physical Review Letters, Vol. 114, Issue 8; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 60 works

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Prompt neutrinos and intrinsic charm at SHiP Bai, Weidong; Reno, Mary Hall arXiv https://doi.org/10.48550/arxiv.1807.02746	text	January 2018

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