Intrinsic charm quark valence distribution of the proton

(NNPDF Collaboration)

doi:10.1103/PhysRevD.109.L091501

Intrinsic charm quark valence distribution of the proton

(NNPDF Collaboration)

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e., a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated; hence, our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment and flavor-tagged structure functions at the Electron-Ion Collider.

Original language	English
Article number	L091501
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review D
Volume	109
Issue number	9
Early online date	1 May 2024
DOIs	https://doi.org/10.1103/PhysRevD.109.L091501
Publication status	Published - 1 May 2024

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© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

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title = "Intrinsic charm quark valence distribution of the proton",

abstract = "We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e., a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated; hence, our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment and flavor-tagged structure functions at the Electron-Ion Collider.",

author = "Ball, \{Richard D.\} and Alessandro Candido and Juan Cruz-Martinez and Stefano Forte and Tommaso Giani and Felix Hekhorn and Giacomo Magni and Nocera, \{Emanuele R.\} and Juan Rojo and Roy Stegeman and \{(NNPDF Collaboration)\}",

note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

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doi = "10.1103/PhysRevD.109.L091501",

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AU - Ball, Richard D.

AU - Candido, Alessandro

AU - Cruz-Martinez, Juan

AU - Forte, Stefano

AU - Giani, Tommaso

AU - Hekhorn, Felix

AU - Magni, Giacomo

AU - Nocera, Emanuele R.

AU - Rojo, Juan

AU - Stegeman, Roy

AU - (NNPDF Collaboration)

N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2024/5/1

Y1 - 2024/5/1

N2 - We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e., a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated; hence, our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment and flavor-tagged structure functions at the Electron-Ion Collider.

AB - We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e., a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated; hence, our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment and flavor-tagged structure functions at the Electron-Ion Collider.

UR - https://www.scopus.com/pages/publications/85192838082

UR - https://www.scopus.com/pages/publications/85192838082#tab=citedBy

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VL - 109

SP - 1

EP - 7

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - L091501

ER -

Intrinsic charm quark valence distribution of the proton

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