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Nuclear Theory·nucl-th

Monday·December 5, 2022

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 06

    Are the ground states of randomly interacting bosons random?

    Charles White · Alexander Volya · Declan Mulhall · Vladimir Zelevinsky

    Bosonic degrees of freedom and their emergence as a part of complex quantum many-body dynamics, symmetries, collective behavior, clustering and phase transitions play an important role in modern studies of quantum systems. In this work we present a systematic study of many-boson systems governed by random interactions. Our findings show that ground states of randomly interacting bosons are not random, being dominated by a few collective configurations containing condensates of clusters.

    ↳ quant-phnucl-thPRResearch(2023)·3 citations
  2. 07

    Accessing GPDs through the exclusive photoproduction of a photon-meson pair with a large invariant mass

    Goran Duplančić🇫🇷 · Saad Nabeebaccus🇫🇷 · Kornelija Passek-Kumerički🇭🇷 · Bernard Pire🇭🇷 · Lech Szymanowski🇫🇷 · Samuel Wallon🇵🇱

    We study the exclusive photoproduction of a photon-meson pair with a large invariant mass, working in the QCD factorisation framework. Explicitly, we consider a -meson or a charged in the final state. This process gives access to chiral-even GPDs as well as chiral-odd GPDs. We focus here on the chiral-even sector. The computation is performed at leading order and leading twist. We discuss the prospects of measuring them in various experiments such as JLab 12-GeV, COMPASS, future EIC and LHC (in ultraperipheral collisions). In particular, the high centre of mass energies available at collider experiments can be used to probe GPDs at small skewness . We also compute the polarisation asymmetries with respect to the incoming photon. The results for an alternative distribution amplitude (`holographic' form) are also compared with the predictions obtained with an asymptotic distribution amplitude.

    ↳ hep-phhep-exnucl-exnucl-thActa Phys.Polon.Supp.(2023)·5 citations

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