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Nuclear Theory·nucl-th

Tuesday·January 24, 2023

4 papers—1 primary·3 cross-listed

All4Primary1Cross-lists3
  1. 02

    [Submitted on 22 Jan 2023] (cross-list from hep-ph)

    NLOAccess: automated online computations for collider physics

    Carlo Flore🇫🇷

    We present NLOAccess, an online platform acting as a virtual access to automated perturbative computations of physical observables related to collider physics within collinear factorisation. We discuss the design of the project and illustrate how, with few steps and without any need of pre-code or code compilation, a user can generate events and calculate cross sections related for instance to quarkonium production and/or heavy-ion collisions at leading and next-to-leading order in using MadGraph5_aMC@NLO or HELAC-Onia. Finally, we report about the obtained results in terms of number of users and runs, and we illustrate the future plans of the project.

    Comments:
    7 pages, 1 figure, matches published version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th); Computational Physics (physics.comp-ph)
    arXiv:
    2301.09167 [pdf]
    EPJA(2023)·5 citations
  2. 03

    [Submitted on 23 Jan 2023] (cross-list from hep-ph)

    Diffractive structure function in the dipole picture

    G. Beuf🇵🇱 · H. Hänninen🇫🇮 · T. Lappi🇫🇮 · H. Mäntysaari🇫🇮 · Y. Mulian🇪🇸

    We calculate the contribution from the component of a virtual photon state to the small- diffractive cross section in deep inelastic scattering in the saturation regime. The obtained cross section is finite by itself and a part of the full next-to-leading order result. We perform the calculation in exact kinematics in the eikonal limit, and show that the previously known high virtuality and large invariant mass results for the structure functions can be extracted. We furthermore discuss the steps required to obtain the full next-to-leading order result.

    Comments:
    6 pages, 1 figure. Presented by T.L. at "Diffraction and Low-x 2022," Corigliano Calabro, Italy, September 24-40, 2022
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.09366 [pdf]
    Acta Phys.Polon.Supp.(2023)·0 citations
  3. 04

    [Submitted on 23 Jan 2023] (cross-list from hep-ph)

    Dilepton production from hot and magnetized hadronic matter

    Rajkumar Mondal🇮🇳 · Nilanjan Chaudhuri🇮🇳 · Snigdha Ghosh🇮🇳 · Sourav Sarkar🇮🇳 · Pradip Roy🇮🇳

    The rate of dilepton emission from a magnetized hot hadronic medium is calculated in the framework of real time formalism of finite temperature field theory. We evaluate the one loop self-energy of neutral rho-meson containing thermo-magnetic propagators for the charged pions in the loop. The in-medium thermo-magnetic spectral function of rho obtained by solving the Dyson-Schwinger equation is shown to be proportional to the dilepton production rate. The study of the analytic structure of the neutral rho-meson spectral function in such a medium shows that in addition to the usual contribution coming from the Unitary cut beyond the two-pion threshold there is a non-trivial yield in the low invariant mass region originating due to the fact that the charged pions occupy different Landau levels before and after scattering with the neutral rho-meson and is purely a finite magnetic field effect.

    Comments:
    Version published in Physical Review D
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.09475 [pdf]
    PRD(2023)·13 citations

Affiliations

first authorsco-authorsvia INSPIRE