Hanbury-Brown-Twiss measurements at large rapidity separations, or can we measure the proton radius in p-A collisions?

Abstract

We point out that current calculations of inclusive two-particle correlations in p-A collisions based on the Color Glass Condensate approach exhibit a contribution from Hanbury-Brown-Twiss correlations. These HBT correlations are quite distinct from the standard ones, in that they are apparent for particles widely separated in rapidity. The transverse size of the emitter which is reflected in these correlations is the gluonic size of the proton. This raises an interesting possibility of measuring the proton size directly by the HBT effect of particle pairs produced in p-A collisions.

11 pages, 3 eps figures; v2: comments, discussions, references and acknowledgements added, conclusions unchanged, final version

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Cited by in corpus (24)

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• DPS in CGC: Double Quark Production and Effects of Quantum Statistics
• Multi Quark Production in p+A collisions: Quantum Interference Effects
• Particle correlations from the initial state
• Correlations and the ridge in the Color Glass Condensate beyond the glasma graph approximation
• Multiparticle production in proton-nucleus collisions beyond eikonal accuracy
• Multi-particle production in proton-nucleus collisions in the Color Glass Condensate
• Perturbative QCD and beyond: azimuthal angle correlations in deuteron-deuteron scattering from Bose-Einstein correlations
• CGC/saturation approach for high energy soft interactions: `soft' Pomeron structure and $v_n$ in hadron and nucleus collisions from Bose-Einstein correlation
• Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of $v_2$
• DPS in CGC: HBT correlations in double inclusive photon production
• A CGC/saturation approach for angular correlations in proton-proton scattering
• Two scales in Bose-Einstein correlations
• Bose-Einstein correlations and ${\mathbf{v}}_{2n}$ and ${\mathbf{v}}_{2n-1}$ in hadron and nucleus collisions
• Bose-Einstein correlations in perturbative QCD: $v_n$ dependence on multiplicity
• Energy evolution of J/$\psi$ production in DIS on nuclei
• New method of accounting for interference contributions within a multipheriperal model
• Azimuthal angle correlations at large rapidities: revisiting density variation mechanism
• CGC/saturation approach: re-visiting the problem of odd harmonics in angular correlations
• Double inclusive small-x gluon production and their azimuthal correlations in a biased ensemble
• Energy evolution and the Bose-Einstein enhancement for double parton densities