Slow neutron production as a probe of hadron formation in high-energy $\gamma^*A$ reactions - INSPIRE

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Slow neutron production as a probe of hadron formation in high-energy $\gamma^*A$ reactions

A.B. Larionov
(
)
,
M. Strikman
(
- Penn State U.
)

Dec 19, 2018

16 pages

Published in:

Phys.Rev.C 101 (2020) 1, 014617

Published: Jan 24, 2020

e-Print:

1812.08231 [hep-ph]

DOI:

10.1103/PhysRevC.101.014617

Experiments:

GiBUU

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Abstract: (APS)

Deep inelastic scattering (DIS) experiments at the planned Electron-Ion Collider will be affected by details of the hadron formation inside the nuclear volume. Besides semi-inclusive particle production experiments, decays of the target nucleus via emission of neutrons provide an additional opportunity to probe this domain. This paper reports on the hybrid dynamical+statistical calculations of low-energy neutron production in muon-induced and virtual photon-induced collisions with nuclei. We confirm the conclusion that the E665 data on neutron production in μ− + Pb DIS at 470 GeV indicate a strong suppression of the final-state interaction for hadrons with momenta above ≈1 GeV/c. Ultraperipheral heavy-ion collisions at the Large Hadron Collider (LHC) and the Relativistic Heavy Ion Collider (RHIC) can be used to test this suppression. The calculations of the neutron multiplicity distributions and pt spectra in photon-nucleus collisions at the energies accessible at the LHC and RHIC are presented for several models of hadron formation. We argue that studies of neutron production in ultraperipheral heavy-ion collisions open a window onto the small-x dynamics and hadron component of the photon wave function.

Note:

34 pages, 10 figures, revised sec. 1 and 2, main results and conclusions unchanged, version accepted in Phys. Rev. C

Nuclear Reactions
n: production
hadron: formation
photon: direct production
nucleus: fragmentation
nucleus: transparency
nucleus: interaction
nucleus: decay
photon: wave function
n: multiplicity

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