Thu·Dec 14, 2017Thursday·December 14, 2017

1. 01*

   A new type nuclear reaction on 159Tb in the outgoing channel considering observation of a bound dineutron

   I.M. Kadenko🇺🇦

   A new type nuclear reaction on 159Tb with neutrons and protons in the incident channels and a bound dineutron (2n) in the output channel is considered based on available experimental observations. The dineutron is assumed to be separated from the volume but not from the potential well of the residual nucleus. Such configuration represents a nuclear system with a satellite dineutron located at few fm distances from the surface of the residual nucleus. Due to dineutron disintegration the decay products may react with the residual nuclei, leading to their transformations much faster than expected.

   nucl-ex0 citations
2. 02*

   Particle Physics with Gravitational Wave Detector Technology

   Christoph Englert🇬🇧 · Stefan Hild🇬🇧 · Michael Spannowsky🇬🇧

   Gravitational wave detector technology provides high-precision measurement apparatuses that, if combined with a modulated particle source, have the potential to measure and constrain particle interactions in a novel way, by measuring the pressure caused by scattering particle beams off the mirror material. Such a measurement does not rely on tagging a final state. This strategy has the potential to allow us to explore novel ways to constrain the presence of new interactions beyond the Standard Model of Particle Physics and provide additional constraints to poorly understood cross sections in the non-perturbative regime of QCD and Nuclear Physics, which are limiting factors of dark matter and neutrino physics searches. Beyond high-energy physics, if technically feasible, the proposed method to measure nucleon-nucleon interactions can lead to practical applications in material and medical sciences.

   ↳ hep-phhep-exnucl-exEPL(2018)·3 citations
3. 03*

   Thermal radiation and entanglement in proton-proton collisions at the LHC

   O.K. Baker🇺🇸 · D.E. Kharzeev🇺🇸

   The origin of the apparent thermalization in high-energy collisions is investigated using the data of the ATLAS and CMS Collaborations at the LHC. For this purpose, we analyze the transverse momentum distributions in the following proton-proton collision processes, all at $\sqrt{s}=13$ TeV: i) inclusive inelastic $pp$ collisions; ii) single- and double-diffractive Drell-Yan production $pp\to {\mu }^{+}{\mu }^{-}X$; and iii) Higgs boson production. We confirm the relation between the effective temperature and the hard scattering scale observed at lower energies, and find that it extends even to the Higgs boson production process. In addition we find that the thermal component disappears in diffractive events (even though many charged hadrons are still produced). We discuss the implications of our study for the mechanism of multi-particle production -- in particular, we test the hypothesis about the link between quantum entanglement and thermalization in high-energy collisions.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2018)·98 citations
4. 04*

   Probing proton transition momentum in neutron-rich matter

   Gao-Chan Yong🇨🇳

   Around the nuclear Fermi momentum, there is a transition of nucleon momentum distribution n(k) in nuclear matter, i.e., from a constant to the $1/k^4$ nucleon momentum distribution. While nowadays the transition momentum of minority in asymmetric matter is rarely studied and thus undetermined. In the framework of the IBUU transport model, proton transition momentum in nuclei is first studied. It is found that the transition momentum of proton is sensitive to the ${\pi }^{-}/{\pi }^{+}$ ratio as well as the energetic photon production in neutron-rich nuclear reaction. This result may push the study of how the proton momentum is distributed in neutron-rich matter forward and help us to better understand the dynamics of both neutron-rich nuclear reactions and neutron stars.

   ↳ nucl-thnucl-exPLB(2018)·22 citations
5. 05*

   A flow paradigm in heavy-ion collisions

   Li Yan🇨🇦

   The success of hydrodynamics in high energy heavy-ion collisions leads to a flow paradigm, to understand the observed features of harmonic flow in terms of the medium collective expansion regarding initial state geometrical properties. In this review, we present some essential ingredients in the flow paradigm, including the hydrodynamic modeling, the characterization of initial state geometry and the medium response relations. The extension of the flow paradigm to small colliding systems is also discussed.

   ↳ nucl-thhep-phnucl-exCPC(2018)·42 citations
6. 06*

   Production of light hypernuclei with light-ion beams and targets

   Y.L. Sun🇫🇷 · A.S. Botvina🇩🇪 · A. Obertelli🇫🇷 · A. Corsi🇫🇷 · M. Bleicher🇩🇪

   Ion-ion collisions at relativistic energies have been shown recently to be a promising technique for the production of hypernuclei. In this article, we further investigate the production of light $\Lambda$ hypernuclei by use of a hybrid dynamical model, cascade-coalescence followed by Fermi breakup. The predictions are then compared with the available experimental data. The dependence of the production cross section upon the beam energy, beam mass number as well as different projectile-target combinations is investigated. In particular, we evaluate the yields and signal-over-background ratio in the invariant-mass spectrum for carbon projectiles impinging on hydrogen and carbon targets and various coincidence conditions in the experiment using the theoretical calculation as an input. It is found that comparing with carbon target, hydrogen target also leads to sizable hypernuclear yields, even for exotic species, and the hydrogen target could improve significantly signal-over-background ratio in some hypernuclear invariant mass studies.

   ↳ nucl-thnucl-exPRC(2018)·16 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.