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Nuclear Theory·nucl-th

Monday·May 18, 2015

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 04

    [Submitted on 15 May 2015] (cross-list from physics.atom-ph)

    Momentum-space calculation of He triatomic system with realistic potential

    A. Deltuva🇱🇹

    The system of three atoms with realistic interactions is studied in the momentum-space framework. It is demonstrated that short and long-range difficulties encountered in the coordinate-space calculations can be reliably resolved in the momentum-space calculations. Well-converged and accurate results are obtained for the ground and excited trimer energies, atom-dimer scattering length, phase shifts, inelasticity parameters, and elastic and breakup cross sections. A significant correction to previously published results is found for the elastic cross section at very low energy.

    Comments:
    8 pages, 4 figures, accepted for publication in Few-Body Systems
    Subjects:
    Atomic Physics (physics.atom-ph); Nuclear Theory (nucl-th)
    arXiv:
    1505.03927 [pdf]
    Few Body Syst.(2015)·19 citations
  2. 05

    [Submitted on 15 May 2015] (cross-list from hep-ph)

    Dilepton production from the quark-gluon plasma using leading-order (3+1)D anisotropic hydrodynamics

    Radoslaw Ryblewski🇵🇱 · Michael Strickland🇺🇸

    Dilepton production from the quark-gluon plasma (QGP) phase of ultra-relativistic heavy-ion collisions is computed using the leading-order (3+1)-dimensional anisotropic hydrodynamics. It is shown that high-energy dilepton spectrum is sensitive to the initial local-rest-frame momentum-space anisotropy of the QGP. Our findings suggest that it may be possible to constrain the early-time momentum-space anisotropy in relativistic heavy-ion collisions using high-energy dilepton yields.

    Comments:
    Talk presented by Radoslaw Ryblewski at Excited QCD 2015, 8-14 March 2015, Tatranska Lomnica, Slovakia, 6 pages, 2 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1505.04018 [pdf]
    Acta Phys.Polon.Supp.(2015)·3 citations
  3. 06

    [Submitted on 15 May 2015] (cross-list from hep-ph)

    A short review of some double-parton scattering processes

    Antoni Szczurek🇵🇱

    A few examples of quickly developing field of double parton scattering are discussed. We present arguments that the production of two pairs of charm quark-antiquark is the golden reaction to study the double parton scattering effects. We discuss briefly also mechanism of single parton scattering and show that it gives much smaller contribution to the final state. In this context we discuss also the contribution of perturbative parton-splitting mechanism which should also be added to the conventional DPS mechanism. The presence of the letter leads to collision energy and other kinematical variables dependence of so-called . We briefly discuss production of four jets. We concentrate on estimation of the contribution of DPS for jets widely separated in rapidity. Finally we briefly mention about DPS effects in production of .

    Comments:
    10 pages, 9 figures, invited talk at the Excited QCD 2015, Tatranska Lomnica, Slovakia, 8-14 March 2015. arXiv admin note: text overlap with arXiv:1504.06491, order of figures changed, references added
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1505.04067 [pdf]
    Acta Phys.Polon.Supp.(2015)·8 citations
  4. 07

    [Submitted on 15 May 2015] (cross-list from hep-ph)

    Manifestation of proton structure in the initial-state anisotropies in high-energy proton-proton collisions

    Patryk Kubiczek🇵🇱 · Stanislaw D. Glazek🇵🇱

    Ridge-like correlations in high-energy proton-proton collisions reported by the CMS collaboration suggest a collective flow that resembles the one in heavy-ion collisions. If the hydrodynamic description is valid then the effect results from the initial anisotropy of the colliding matter which depends on the structure of protons. Following recent theoretical developments, we propose several phenomenological models of the proton structure and calculate the anisotropy coefficients using the Monte Carlo Glauber model. Our estimates suggest that the event multiplicity dependence allows one to discriminate between different proton models.

    Comments:
    15 pages, 7 figures, submitted to Lith. J. Phys, corrected plots
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1505.04155 [pdf]
    Lith.J.Phys.(2015)·11 citations

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