Suppression of diffraction in deep-inelastic scattering on nuclei and dynamical mechanism of leading twist nuclear shadowing
Guzey, V., & Strikman, M. (2024). Suppression of diffraction in deep-inelastic scattering on nuclei and dynamical mechanism of leading twist nuclear shadowing. Journal of High Energy Physics, 2024(7), Article 45. https://doi.org/10.1007/JHEP07(2024)045
Published in
Journal of High Energy PhysicsDate
2024Copyright
© The Authors. Article funded by SCOAP3
Using the leading twist approach (LTA) to nuclear shadowing, we calculate the ratios of diffractive and usual parton distributions for a heavy nucleus (Pb) and the proton, RA/p=(fD(3)i/A/fi/A)/(fD(3)i/p/fi/p), for coherent and summed (coherent plus quasi-elastic) nuclear deep-inelastic scattering. We find that RA/p≈0.5−1 for quarks as well as for the ratio of the diffractive and total cross sections [(dσdiff/dM2X)/σtot]eA/[(dσdiff/dM2X)/σtot]ep and RA/p≈0.5−1.3 for gluons in a broad range of x, including the kinematics of the Electron-Ion Collider, which reaffirms the difference from the nuclear enhancement of RA/p predicted in the gluon saturation framework. We demonstrate that the magnitude of RA/p is controlled by the cross section of the interaction of hadronic fluctuations of the virtual photon with target nucleons, which explains an enhancement of RA/p in the color dipole model and its suppression in LTA. We argue that the black disk limit corresponds to RA/p=1 and RcohA/p=0.86 for the summed and coherent scattering, respectively. Relying on an intuitive definition of the saturation scale, we show that the ratio of the saturation scales of a heavy nucleus and proton Q2sA(b)/Q2sp(b)≈1 at small impact parameters b due to the strong leading twist nuclear shadowing and diluteness of the nuclear density.
...
Publisher
SpringerISSN Search the Publication Forum
1126-6708Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/233310449
Metadata
Show full item recordCollections
Related funder(s)
Research Council of Finland; European CommissionFunding program(s)
Centre of Excellence, AoF; ERC Advanced Grant; Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
The research of V.G. was funded by the Academy of Finland project 330448, the Center of Excellence in Quark Matter of the Academy of Finland (projects 346325 and 346326), and the European Research Council project ERC-2018-ADG-835105 YoctoLHC. The research of M.S. was supported by the US Department of Energy Office of Science, Office of Nuclear Physics under Award No. DE-FG02-93ER40771.License
Related items
Showing items with similar title or keywords.
-
Rapidity gap distribution of diffractive small-xp events at HERA and at the EIC
Lappi, Tuomas; Le, Anh Dung; Mäntysaari, Heikki (American Physical Society (APS), 2023)We use the Kovchegov-Levin equation to resum contributions of large invariant mass diffractive final states to diffractive structure functions in the dipole picture of deep inelastic scattering. For protons we use a ... -
NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC
Helenius, Ilkka; Walt, Marina; Vogelsang, Werner (American Physical Society (APS), 2022)We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order and next-to-next-to-leading order in perturbative QCD. Our analyses are based on deeply inelastic scattering data with charged-lepton ... -
Applicability of pion–nucleus Drell–Yan data in global analysis of nuclear parton distribution functions
Paakkinen, Petja; Eskola, Kari; Paukkunen, Hannu (Elsevier B.V., 2017)Despite the success of modern nuclear parton distribution functions (nPDFs) in describing nuclear hard-process data, they still suffer from large uncertainties. One of the poorly constrained features is the possible asymmetry ... -
Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO
Walt, Marina; Helenius, Ilkka; Vogelsang, Werner (American Physical Society, 2019)We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order and next-to-next-to-leading order. Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino ... -
Constraints on nuclear parton distributions from dijet photoproduction at the LHC
Guzey, Vadim; Klasen, Michael (Springer, 2019)Using QCD calculations of the cross section of inclusive dijet photoproduction in Pb–Pb ultraperipheral collisions in the LHC kinematics as pseudo-data, we study the effect of including these data using the Bayesian ...