Impact of inclusive hadron production data on nuclear gluon PDFs

Duwentäster, P.; Husová, L. A.; Ježo, T.; Klasen, M.; Kovařík, K.; Kusina, A.; Muzakka, K. F.; Olness, F. I.; Schienbein, I.; Yu, J. Y.

doi:10.1103/PhysRevD.104.094005

Title: Impact of inclusive hadron production data on nuclear gluon PDFs

Journal Article · Fri Nov 05 00:00:00 EDT 2021 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.104.094005· OSTI ID:1829096

; Husová, L. A.; Ježo, T.; Klasen, M.; Kovařík, K.; Kusina, A.; Muzakka, K. F.; Olness, F. I.; Schienbein, I.; Yu, J. Y.

A precise knowledge of nuclear parton distribution functions (nPDFs) is—among other things—important for the unambiguous interpretation of hard process data taken in pA and AA collisions at the Relativistic Heavy Ion Collider (RHIC) and the LHC. The available fixed target data for deep inelastic scattering (DIS) and Drell-Yan (DY) lepton pair production mainly constrain the light quark distributions. It is hence crucial to include more and more collider data in global analyses of nPDFs in order to better pin down the different parton flavors, in particular the gluon distribution at small x. To help constrain the nuclear gluon PDF, we extend the nCTEQ15 analysis by including single inclusive hadron (SIH) production data from RHIC (PHENIX and STAR) and LHC (ALICE). In addition to the DIS, DY, and SIH datasets, we will also include LHC W/Z production data. As the SIH calculation is dependent on hadronic fragmentation functions (FFs), we use a variety of FFs available in the literature to properly estimate this source of uncertainty. We study the impact of these data on the PDFs and compare with both the nCTEQ15 and nCTEQ15WZ sets. The calculations are performed using a new implementation of the nCTEQ code (ncteq++) including a modified version of incnlo, which allows faster calculations using precomputed grids. The extension of the nCTEQ15 analysis to include the SIH data represents an important step toward the next generation of PDFs.

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Research Organization:: Southern Methodist Univ., Dallas, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC); German Research Foundation (DFG); Narodowe Centrum Nauki; National Science Foundation (NSF); French CNRS

Grant/Contract Number:: SC0010129; 2019/34/E/ ST2/00186; 396021762— TRR 257; PHY-1748958

OSTI ID:: 1829096

Alternate ID(s):: OSTI ID: 1979935

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 104 Journal Issue: 9; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Impact of heavy quark and quarkonium data on nuclear gluon PDFs

Journal Article · Mon Jun 27 00:00:00 EDT 2022 · Physical Review D · OSTI ID:1829096

Duwentäster, P.; Ježo, T.; Klasen, M.; +7 more

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79 ASTRONOMY AND ASTROPHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
fragmentation into hadrons
perturbative QCD
quark models

Title: Impact of inclusive hadron production data on nuclear gluon PDFs

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