Mapping color fluctuations in the photon in ultraperipheral heavy ion collisions at the Large Hadron Collider

Alvioli, Massimiliano; Frankfurt, L.; Guzey, V.; Strikman, M.; Zhalov, M.

doi:10.1016/j.physletb.2017.02.034

Cited by 7 publications

(6 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Drell-Yan or electroweak processes) would allow for a comparison of quark-vs. gluon-dominated configurations. Analogous studies in ultraperipheral collision data [38] may probe color fluctuations in the photon wave function.…”

Section: λ(Xp;mentioning

confidence: 96%

Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

et al. 2018

Self Cite

View full text Add to dashboard Cite

We test the hypothesis that configurations of a proton with a large-x parton, xp > ∼ 0.1, have a smaller than average transverse size. The application of the QCD Q 2 evolution equations shows that these small configurations also have a significantly smaller interaction strength, which has observable consequences in proton -nucleus collisions. We perform a global analysis of jet production data in proton-and deuteron-nucleus collisions at RHIC and the LHC. Using a model which takes a distribution of interaction strengths into account, we quantitatively extract the xp-dependence of the average interaction strength, σ(xp), over a wide kinematic range. By comparing the RHIC and LHC results, our analysis finds that the interaction strength for small configurations, while suppressed, grows faster with collision energy than does that for average configurations. We check that this energy dependence is consistent with the results of a method which, given σ(xp) at one energy, can be used to quantitatively predict that at another. This finding further suggests that at even lower energies, nucleons with a large-xp parton should interact much more weakly than those in an average configuration, a phenomenon in line with explanations of the EMC effect for large-xp quarks in nuclei based on color screening.

show abstract

Section: λ(Xp;mentioning

confidence: 96%

Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…A model for P γ (σ) should interpolate between the regimes of small and large σ; the following presentation in based on Ref. [260]. For small σ σ πN , we use the color dipole model, which allows one to readily present P γ (σ) in the following form, (see [260] for details)…”

Section: P γ ( * ) (σ) Distribution For Real and Virtual Photonsmentioning

confidence: 99%

“…[260]. For small σ σ πN , we use the color dipole model, which allows one to readily present P γ (σ) in the following form, (see [260] for details)…”

Section: P γ ( * ) (σ) Distribution For Real and Virtual Photonsmentioning

confidence: 99%

Selected topics in diffraction with protons and nuclei: past, present, and future

L.¹,

Guzey²,

A.³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

We review a broad range of phenomena in diffraction in the context of hadron-hadron, hadron-nucleus collisions and deep inelastic lepton-proton/nucleus scattering focusing on the interplay between the perturbative QCD and nonperturbative models. We discuss inclusive diffraction in DIS, phenomenology of dipole models, resummation and parton saturation at low x, hard diffractive production of vector mesons, inelastic diffraction in hadron-hadron scattering, formalism of color fluctuations, inclusive coherent and incoherent diffraction as well as soft and hard diffraction phenomena in hadron-hadron/nucleus and photon-nucleus collisions. For each topic we review key results from the past and present experiments including HERA and the LHC. Finally, we identify the remaining open questions, which could be addressed in the continuing experiments, in particular in photon-induced reactions at the LHC and the future Electron-Ion Collider (EIC) in the US, Large Hadron electron Collider (LHeC) and Future Circular Collider (FCC) at CERN.

show abstract

“…(c) One can consider generic γA collisions. Based on the analysis [33] of the color fluctuations in photon we expect that in these collisions the average number of wounded nucleons would be large and fluctuating strongly. The number of emitted neutrons should be correlated with p t of the leading particles produced in the photon fragmentation region (smaller p t -larger neutron number).…”

Section: Directions For Further Studiesmentioning

confidence: 99%

Slow-neutron production as a probe of hadron formation in high-energy γ*A reactions

Larionov

Strikman

2020

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Studies of the hadron formation in hard processes on nuclei were focusing on hadrons in the current fragmentation region. Little is known about the space-time picture of formation of hadrons in the nucleus fragmentation region, in particular, in deep inelastic scattering (DIS). Study of the nucleus decay via emission of neutrons provides a rare opportunity to probe this domain at collider energies. This paper reports on the hybrid dynamical+statistical (GiBUU+SMM) calculations of neutron production in proton-, muon-and virtual photon-induced collisions with nuclei. We confirm the conclusion that the E665 data on neutron production in µ − + Pb DIS indicate a strong suppression of the final state interaction for hadrons with momenta above a value as low as ∼ 1 GeV/c. This is well below the momentum range for which formation time and color transparency effects become important. In a short-run perspective, the ultraperipheral heavy-ion collisions at the LHC and RHIC can be used to test this suppression. We focus on the direct photon process in which a photon coherently emitted by one nucleus interacts with a gluon from another nucleus producing a pair of jets. We present our predictions for the neutron multiplicity distributions and p t -spectra in photon -nucleus collisions at the energies accessible at the LHC and RHIC for direct photon kinematics for several models of hadron formation. We argue that ultimately studies of the neutron production in γA collisions would open a new window on the small x dynamics and hadron component of the photon wave function.

show abstract

Mapping color fluctuations in the photon in ultraperipheral heavy ion collisions at the Large Hadron Collider

Cited by 7 publications

References 70 publications

Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

Selected topics in diffraction with protons and nuclei: past, present, and future

Slow-neutron production as a probe of hadron formation in high-energy γ*A reactions

Contact Info

Product

Resources

About