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First lattice QCD study of the gluonic structure of light nuclei

Journal Article · · Physical Review. D.
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Univ. of Washington, Seattle, WA (United States)
  6. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  7. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Washington, Seattle, WA (United States)
The role of gluons in the structure of the nucleon and light nuclei is investigated using lattice quantum chromodynamics (QCD) calculations. The first moment of the unpolarised gluon distribution is studied in nuclei up to atomic number $A=3$ at quark masses corresponding to pion masses of $$m_\pi\sim 450$$ and $806$ MeV. Nuclear modification of this quantity defines a gluonic analogue of the EMC effect and is constrained to be less than $$\sim 10$$% in these nuclei. This is consistent with expectations from phenomenological quark distributions and the momentum sum rule. In the deuteron, the combination of gluon distributions corresponding to the $$b_1$$ structure function is found to have a small first moment compared with the corresponding momentum fraction. The first moment of the gluon transversity structure function is also investigated in the spin-1 deuteron, where a non-zero signal is observed at $$m_\pi \sim 806$$ MeV. In conclusion, this is the first indication of gluon contributions to nuclear structure that can not be associated with an individual nucleon.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Organization:
NPLQCD Collaboration
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; AC52-07NA27344; FG02-00ER41132; SC0010337
OSTI ID:
1411418
Alternate ID(s):
OSTI ID: 1410480
OSTI ID: 1438748
OSTI ID: 1493279
Report Number(s):
DOE/OR/23177--4204; JLAB-THY--17-2540; LLNL-JRNL--737744; arXiv:1709.00395
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 96; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Nuclear matrix elements from lattice QCD for electroweak and beyond-Standard-Model processes text January 2020
Consistency checks for two-body finite-volume matrix elements: Conserved currents and bound states journal December 2019
Extracting many-body color charge correlators in the proton from exclusive DIS at large Bjorken x journal November 2018
Scalar, Axial, and Tensor Interactions of Light Nuclei from Lattice QCD journal April 2018
Hadrons and nuclei journal November 2019
The energy-momentum tensor of spin-1 hadrons: formalism journal June 2019
The energy-momentum tensor of spin-1 hadrons: formalism text January 2019
Consistency checks for two-body finite-volume matrix elements: I. Conserved currents and bound states text January 2019

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