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Nuclear Theory·nucl-th

Monday·March 25, 2019

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 01

    [Submitted on 21 Mar 2019]

    Time-reversed particle-vibration loops and nuclear Gamow-Teller response

    Caroline Robin · Elena Litvinova

    The nuclear response theory for charge-exchange modes in the relativistic particle-vibration coupling approach is extended to include for the first time particle-vibration coupling effects in the ground state of the parent nucleus. In a framework based on the effective meson-nucleon Lagrangian, we investigate the role of such complex ground-state correlations in the description of Gamow-Teller transitions in Zr in both (p,n) and (n,p) channels. The particle-vibration coupling effects are calculated without introducing new parameters. We find that this new correlation mechanism is fully responsible for the appearance of the strength in the (n,p) branch. Comparison of our results to the available experimental data shows a very good agreement up to excitation energies beyond the giant resonance region when taking into account a phenomenological admixture of the isovector spin monopole transitions. The parent-daughter binding-energy differences are also greatly improved by the inclusion of the new correlations.

    Comments:
    5 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1903.09182 [pdf]
    PRL(2019)·47 citations
  2. 02

    [Submitted on 21 Mar 2019]

    Gravitational form factors of light mesons

    Adam Freese🇺🇸 · Ian C. Cloët🇺🇸

    We calculate the gravitational form factors of the pion, sigma meson, and rho meson in the Nambu-Jona-Lasinio (NJL) model of quantum chromodynamics. The canonical energy-momentum tensor (EMT) is used in their derivation, allowing the possibility of an antisymmetric contribution when the hadron has intrinsic spin. We show that the asymmetric graviton vertex arising from the canonical EMT satisfies a simpler Ward-Takahashi identity (WTI) than the symmetric graviton vertex of the Belinfante EMT. The necessity of fully dressing the graviton vertex through the relevant Bethe-Salpeter equation is demonstrated for observing both the WTI and a low-energy pion theorem. Lastly, we calculate static moments of the meson EMT decompositions, obtaining predictions for the meson mass radii. We find light cone mass radii of 0.27 fm for the pion, 0.32 fm for the sigma, and 0.25 fm for the rho. For the pion and rho, these are smaller than the light cone charge radii, respectively 0.51 fm and 0.45 fm, while we have a sigma charge radius of zero. Our light cone pion mass radius agrees with a phenomenological extraction from KEKB data.

    Comments:
    20 pages, 11 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1903.09222 [pdf]
    PRC(2019)·84 citations
  3. 03

    [Submitted on 22 Mar 2019]

    Elastic magnetic electron scattering from deformed nuclei

    P. Sarriguren · D. Merino · O. Moreno · E. Moya de Guerra · D. N. Kadrev · A. N. Antonov · M. K. Gaidarov

    Magnetic form factors corresponding to elastic electron scattering from odd-A nuclei are presented. The calculations are carried out in plane-wave Born approximation. The one-body properties are obtained in a deformed self-consistent mean-field calculation based on a Skyrme HF+BCS method. Collective effects are also included in the cranking approximation. Results on several stable nuclei are compared with the available experimental information. It is shown that a deformed formalism improves the agreement with experiment in deformed nuclei, while reproducing equally well spherical nuclei by taking properly the spherical limit of the deformed model and the effect of nucleon-nucleon correlations. Thus, the capability of the model to describe magnetic form factors is demonstrated. This opens the door to explore also unstable nuclei of particular interest that could be measured in future experiments on electron-radioactive beam colliders.

    Comments:
    13 pages, 9 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1903.09600 [pdf]
    PRC(2019)·15 citations
  4. 04

    [Submitted on 21 Mar 2019] (cross-list from hep-ph)

    New Observables in Inclusive Production of Quarkonia

    Jean-Philippe Lansberg🇫🇷

    After an introduction motivating the study of quarkonium production, we review the recent developments in the phenomenology of quarkonium production in inclusive scatterings of hadrons and leptons. We naturally address data and predictions relevant for the LHC, the Tevatron, RHIC, HERA, LEP, B factories and EIC. An up-to-date discussion of the contributions from feed downs within the charmonium and bottomonium families as well as from b hadrons to charmonia is also provided. This contextualises an exhaustive overview of new observables such as the associated production along with a Standard Model boson (photon, W and Z), with another quarkonium, with another heavy quark as well as with light hadrons or jets. We address the relevance of these reactions in order to improve our understanding of the mechanisms underlying quarkonium production as well as the physics of multi-parton interactions, in particular the double parton scatterings. An outlook towards future studies and facilities concludes this review.

    Comments:
    LaTeX, 151 pages; 71 figures, 13 tables. Version accepted for publication in Physics Reports
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1903.09185 [pdf]
    Phys.Rept.(2020)·238 citations
  5. 05

    [Submitted on 21 Mar 2019] (cross-list from astro-ph.HE)

    Extreme Gravity and Fundamental Physics

    B.S. Sathyaprakash (Penn State and Cardiff University)🇺🇸 · Alessandra Buonanno (Max Planck Institute for Gravitational Physics, Potsdam and University of Maryland)🇩🇪 · Luis Lehner (Perimeter Institute)🇨🇦 · Chris Van Den Broeck (NIKHEF)🇳🇱 · P. Ajith (International Centre for Theoretical Sciences)🇮🇳 · Archisman Ghosh (NIKHEF)🇳🇱 · Katerina Chatziioannou (Flatiron Institute)🇺🇸 · Paolo Pani (Sapienza University of Rome)🇮🇹 · Michael Puerrer (Max Planck Institute for Gravitational Physics, Potsdam)🇩🇪 · Sanjay Reddy (Institute for Nuclear Theory, University of Washington, Seattle) · Thomas Sotiriou (The University of Nottingham)🇬🇧 · Salvatore Vitale (MIT)🇺🇸 and 17 other authors

    Future gravitational-wave observations will enable unprecedented and unique science in extreme gravity and fundamental physics answering questions about the nature of dynamical spacetimes, the nature of dark matter and the nature of compact objects.

    Comments:
    14 pages, 2 figures, White Paper submitted to the Astro-2020 (2020 Astronomy and Astrophysics Decadal Survey) by GWIC-3G Science Case Team (GWIC: Gravitational-Wave International Committee); replaced Figure 1 with a revised version that incorporates Gravity IR Flare data point
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1903.09221 [pdf]
    96 citations
  6. 06

    [Submitted on 21 Mar 2019] (cross-list from astro-ph.HE)

    The Yet-Unobserved Multi-Messenger Gravitational-Wave Universe

    Vassiliki Kalogera (Northwestern U.)🇺🇸 · Marrie-Anne Bizouard (CNRS, OCA)🇫🇷 · Adam Burrows (Princeton U.)🇺🇸 · Thomas Janka (MPA)🇩🇪 · Kei Kotake (Fukuoka U.)🇯🇵 · Bronson Messer (ORNL \& U. Tennessee)🇺🇸 · Tony Mezzacappa (ORNL & U. Tennessee)🇺🇸 · Bernhard Mueller (Monash U.)🇦🇺 · Ewald Mueller (MPA)🇩🇪 · Maria Alessandra Papa (AEI)🇩🇪 · Sanjay Reddy (U. Washington)🇺🇸 · Stephan Rosswog (Stockholms U.)🇸🇪

    Observations with next-generation ground-based detectors further enhanced with multi-messenger (electromagnetic and neutrino) detections will allow us to probe new extreme astrophysics. Target sources included: core-collapse supernovae, continuous emission from isolated or accreting neutron stars, and bursts from magnetars and other pulsars.

    Comments:
    13 pages, 1 figure, White Paper Submitted to Astro2020 (2020 Astronomy and Astrophysics Decadal Survey) by GWIC 3G Science Case Team (GWIC: Gravitational Wave International Committee)
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
    arXiv:
    1903.09224 [pdf]
    15 citations
  7. 07

    [Submitted on 22 Mar 2019] (cross-list from astro-ph.HE)

    Multimessenger Universe with Gravitational Waves from Binaries

    B.S. Sathyaprakash (Penn State and Cardiff University)🇺🇸 · Matthew Bailes (Swinburne U.)🇦🇺 · Mansi M. Kasliwal (Caltech)🇺🇸 · Samaya Nissanke (U. of Amsterdam)🇳🇱 · Shreya Anand (Caltech)🇺🇸 · Igor Andreoni (Caltech)🇺🇸 · Monica Colpi (U. of Milano - Bicocca)🇮🇹 · Michael Coughlin (Caltech)🇺🇸 · Evan Hall (MIT)🇺🇸 · Vicky Kalogera (Northwestern U.)🇺🇸 · Dan Kasen (UC Berkeley)🇺🇸 · Alberto Sesana (U. Birmingham)🇬🇧

    Future GW detector networks and EM observatories will provide a unique opportunity to observe the most luminous events in the Universe involving matter in extreme environs. They will address some of the key questions in physics and astronomy: formation and evolution of compact binaries, sites of formation of heavy elements and the physics of jets.

    Comments:
    11 pages, two tables, White Paper submitted to the Astro-2020 (2020 Astronomy and Astrophysics Decadal Survey) by GWIC-3G Science Case Team (GWIC: Gravitational-Wave International Committee)
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    1903.09277 [pdf]
    19 citations

Affiliations

first authorsco-authorsvia INSPIRE