Diffractive Dissociation of Alpha Particles as a Test of Isophobic Short-Range Correlations inside Nuclei

Abstract

The CLAS collaboration at Jefferson Laboratory has compared nuclear parton distributions for a range of nuclear targets and found that the EMC effect measured in deep inelastic lepton-nucleus scattering has a strongly "isophobic" nature. This surprising observation suggests short-range correlations between neighboring $n$ and $p$ nucleons in nuclear wavefunctions that are much stronger compared to $p-p$ or $n-n$ correlations. In this paper we propose a definitive experimental test of the nucleon-nucleon explanation of the isophobic nature of the EMC effect: the diffractive dissociation on a nuclear target $A$ of high energy ${}^4\mathrm{He}$ nuclei to pairs of nucleons $n$ and $p$ with high relative transverse momentum, $\alpha +A\to n+p+A^{\prime }+X$. The comparison of $n-p$ events with $p-p$ and $n-n$ events directly tests the postulated breaking of isospin symmetry. The experiment also tests alternative QCD-level explanations for the isophobic EMC effect. In particular it will test a proposal for hidden-color degrees of freedom in nuclear wavefunctions based on isospin-zero $[ud]$ diquarks.

arXiv comment5 pages, references added, clarifications due to helpful referee comments (latexdiff for all changes). Accepted for publication in Physics Letters B

References in corpus (31)

• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Quantum Chromodynamics and Other Field Theories on the Light Cone
• QCD at Finite Baryon Density: Nucleon Droplets and Color Superconductivity
• Hard Scattering and Gauge/String Duality
• Light-Front Holographic QCD and Emerging Confinement
• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• Probing Cold Dense Nuclear Matter
• Deep Inelastic Scattering and Gauge/String Duality
• Light-Front Holography: A First Approximation to QCD
• Evidence for the Strong Dominance of Proton-Neutron Correlations in Nuclei
• Search for lepton-flavour-violating decays of the Higgs boson
• Short Range Correlations and the EMC Effect
• Coherent Nuclear Diffractive Production of Minijets - Illuminating Color Transparency
• Production of the Smallest QED Atom: True Muonium (mu^+ mu^-)
• Direct measurement of the pion valence quark momentum distribution, the pion light-cone wave function squared
• Observation of color-transparency in diffractive dissociation of pions
• Basis Light-Front Quantization Approach to Positronium
• A Challenge to Lepton Universality in B Meson Decays
• Search for lepton flavour violating decays of the Higgs boson to $\mu \tau$ and e$\tau$ in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Test of lepton universality with ${\Lambda }_b^0\to p{K}^{-}{\ell }^{+}{\ell }^{-}$ decays
• Coherent production of hard dijets on nuclei in QCD
• Exposing Novel Quark and Gluon Effects in Nuclei
• Perturbative Pion Wave function in Coherent Pion-Nucleon Di-Jet Production
• Atomic Alchemy
• A Challenge to Lepton Universality in B Meson Decays
• QCD Hidden-Color Hexa-diquark in the Central Core of Nuclei
• True muonium: the atom that has it all
• High Resolution Nonperturbative Light-Front Simulations of the True Muonium Atom
• Diffractive Dissociation of High Momentum Pions
• Atoms in Flight and the Remarkable Connections between Atomic and Hadronic Physics
• Measurement of the F2n/F2p and d/u Ratios in Deep Inelastic Electron Scattering off 3H and 3He

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