Thu·Jan 21, 2016Thursday·January 21, 2016

1. 01*

   Measurement of the $\vec{n}p\to d{\pi }^0{\pi }^0$ Reaction with Polarized Beam in the Region of the $d^{\ast }(2380)$ Resonance

   P. Adlarson · W.Augustyniak · W.Bardan · M. Bashkanov · F.S. Bergmann · M. Berłowski · H. Bhatt · A. Bondar · M. Büscher · H. Calen · I. Ciepał · H. Clement and 82 other authors

   We report on a high-statistics measurement of the most basic double pionic fusion reaction $\vec{n}p\to d{\pi }^0{\pi }^0$ over the energy region of the $d^{\ast }(2380)$ resonance by use of a polarized deuteron beam and observing the double fusion reaction in the quasifree scattering mode. The measurements were performed with the WASA detector setup at COSY. The data reveal substantial analyzing powers and confirm conclusions about the $d^{\ast }$ resonance obtained from unpolarized measurements. We also confirm the previous unpolarized data obtained under complementary kinematic conditions.

   nucl-exEPJA(2016)·26 citations
2. 02*

   Glueball dynamics in the hot plasma

   Nikolai Kochelev🇷🇺

   We discuss the glueball contribution to the equation of state (EoS) of hot gluon matter below and above $T_c$. It is shown that the strong changing of masses of scalar and pseudoscalar glueballs near $T_c$ plays very important role in the thermodynamics of $SU(3)$ gauge theory. In particular, we give the arguments that these glueballs become massless at $T_G\approx 1.1T_c$ and this phenomenon is crucial in understanding of the mystery in the behavior of trace anomaly founded in the lattice calculation.

   ↳ hep-phhep-exnucl-exnucl-thEPJA(2016)·1 citation
3. 03*

   Indication of a Differential Freeze-out in Proton-Proton and Heavy-Ion Collisions at RHIC and LHC energies

   Dhananjaya Thakur🇮🇳 · Sushanta Tripathy🇮🇳 · Prakhar Garg🇮🇳 · Raghunath Sahoo🇮🇳 · Jean Cleymans🇿🇦

   The experimental data from the RHIC and LHC experiments of invariant pT spectra in A+A and p + p collisions are analysed with Tsallis distributions in different approaches. The information about the freeze-out surface in terms of freeze-out volume, temperature, chemical potential and radial flow velocity for different particle species are obtained. Further, these parameters are studied as a function of the mass of the secondary particles. A mass-dependent differential freeze-out is observed which does not seem to distinguish between particles and their antiparticles. Further a mass-hierarchy in the radial flow is observed, meaning heavier particles suffer lower radial flow. Tsallis distribution function at finite chemical potential is used to study the mass dependence of chemical potential. The peripheral heavy-ion and proton-proton collisions at the same energies seem to be equivalent in terms of the extracted thermodynamic parameters.

   ↳ hep-phnucl-exnucl-thAdv.High Energy Phys.(2016)·75 citations
4. 04*

   A theoretical analysis of mid-mass neutron halos. What changes going from few- to many-body systems regarding neutron halos?

   T. Duguet🇫🇷

   The present contribution summarizes the content and slightly updates the discussion of a recently proposed theoretical analysis of the halo phenomenon in many-fermion systems. We focus here on applications to potential neutron halos in mid-mass nuclei.

   ↳ nucl-thnucl-exFew Body Syst.(2016)·1 citation

* 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.