Exclusive vector meson production at an electron-ion collider

Lomnitz, M.

doi:10.1103/physrevc.99.015203

Cited by 45 publications

(52 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The a + 2 (1320) and Z + c (4430) are produced in a relatively narrow rapidity regions because σ(γp → X + n) for both is largest near threshold, due to the Reggeon exchange mechanism. This is very different from the Pomeron+ Reggeon exchange process which spreads ρ 0 over a wide rapidity range [17].…”

mentioning

confidence: 74%

Photoproduction of charged final states in ultraperipheral collisions and electroproduction at an electron-ion collider

Klein

Xie

2019

Phys. Rev. C

View full text Add to dashboard Cite

Ultra-peripheral collisions (UPCs) of relativistic ions are an important tool for studying photoproduction at high energies. Vector meson photoproduction is an important tool for nuclear structure measurements and other applications. A future electron-ion collider (EIC) will allow additional studies, using virtual photons with a wide range of Q 2 . We propose a significant expansion of the UPC and EIC photoproduction physics programs to include charged final states which may be produced via Reggeon exchange. We consider two examples: a + 2 (1320), which is a conventional qq meson, and the exotic Z + c (4430) state (modeled here as a tetraquark). The Z + c (4430) cross-section depends on its internal structure, so photoproduction can test whether the Z + c (4430) is a tetraquark or other exotic object. We calculate the rates and kinematic distributions for γp → X + n in pA UPCs and ep collisions at an EIC and in UPCs. The rates are large enough for detailed studies of these final states. Because the cross-section for Reggeon exchange is largest near threshold, the final state rapidity distribution depends on the beam energies. At high-energy colliders like the proposed LHeC or pA collisions at the LHC, the final states are produced at far forward rapidities. For lower energy colliders, the systems are produced closer to mid-rapidity, within reach of central detectors. * srklein@lbl.gov † xieyp@lbl.gov

show abstract

mentioning

confidence: 74%

Photoproduction of charged final states in ultraperipheral collisions and electroproduction at an electron-ion collider

Klein

Xie

2019

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…It will also allow us to make a much cleaner determination as to whether the target nucleus remained intact, improving our measurements of incoherent photoproduction. Finally, it will produce billions of dipions, 10s of millions of J/ψ and of order 100,000 Υ [95] in a year, allowing for detailed measurements of coherent and incoherent photoproduction over a wide range of Q 2 .…”

Section: Discussionmentioning

confidence: 99%

Imaging the nucleus with high-energy photons

Klein

Mäntysaari

2019

Nat Rev Phys

View full text Add to dashboard Cite

In the 1930's, nuclear physicists developed the first realistic atomic models, showing that nuclei were made up of protons and neutrons. In the 1960's, Deep Inelastic Scattering experiments showed that protons and neutrons had internal structure: quarks and gluons (collectively, partons), and later experiments showed that the parton momentum distributions are different in heavy nuclei, compared to those in free nucleons. This difference is not surprising; partons are sensitive to their environment, and two gluons from different nucleons may fuse together, for example.Understanding how quarks and gluons behave in the nuclear environment is a significant focus of modern nuclear physics. Recent measurements have provided us with an improved understanding of how quark and gluon densities are altered in heavy nuclei. We have also begun to make multidimensional pictures of the nucleus, exploring how these alterations are distributed within heavy nuclei. We naturally expect these modifications to be largest in the core of a nucleus, and smaller near its periphery; this can change the effective shape of the nucleus. We have also started to explore the transverse momentum distribution of the partons in the nuclei, and, using incoherent photoproduction as a probe, study event-by-event fluctuations in nucleon and nuclei parton densities.This article will explore recent progress in measurements of nuclear structure at high energy, with some emphasis on these multi-dimensional pictures. We will also discuss how a future electron-ion collider (EIC) with high luminosity and center-of-mass energy will make exquisitely detailed images of partons in a nucleus.

show abstract

“…Meanwhile, there has been a strong proposal to build an intermediate energy electron-ion collider in China (EicC) [32], where the energy range is ideal to study both near and sub-threshold Υ production in γp and γA collisions, respectively. There is also a possibility to study the nearthreshold production of Υ at the EIC in the U.S. [33] and at RHIC using ultraperipheral collisions [34]. Our calculations in this paper will provide an important guidelines for these future experiments.…”

Section: Introductionmentioning

confidence: 93%

“…4. This energy range is ideally suited for the EicC, but it could also be studied at the EIC in the U.S. [33], or even at RHIC by focusing on the ultraperipheral AA collisions (UPCs) [34]. We find that the Υ cross section near threshold is about 10 −3 ∼ 10 −2 nb, and this is further reduced to 10 −5 nb around the region W γp 9.7 GeV where the SRC contribution starts to dominate.…”

Section: B Src Contribution From the Spectral Functionmentioning

confidence: 99%

Sub-threshold J/ψ and ϒ production in γA collisions

Hatta

Strikman

et al. 2020

Physics Letters B

View full text Add to dashboard Cite

We study sub-threshold heavy quarkonium (J/ψ and Υ) photo-productions in γA collisions as an independent test of the universality of the nucleon-nucleon short range correlation (SRC) in nuclear scattering processes. Just below the γp threshold, the cross section is dominated by the mean field contribution of nucleons inside the nucleus. The SRC contributions start to dominate at lower photon energies, depending on the fraction of the SRC pairs in the target nucleus. We give an estimate of the cross sections in the sub-threshold region both for J/ψ and Υ. This may be helpful for future measurements at JLab as well as at the Electron-Ion Collider in the U.S., and especially in China.

show abstract

Exclusive vector meson production at an electron-ion collider

Cited by 45 publications

References 43 publications

Photoproduction of charged final states in ultraperipheral collisions and electroproduction at an electron-ion collider

Photoproduction of charged final states in ultraperipheral collisions and electroproduction at an electron-ion collider

Imaging the nucleus with high-energy photons

Sub-threshold J/ψ and ϒ production in γA collisions

Contact Info

Product

Resources

About