Thu·Mar 17, 2016Thursday·March 17, 2016

1. 01*

   Mean-field study of ${}^{12}$C+${}^{12}$C fusion

   Le Hoang Chien · Do Cong Cuong · Dao T. Khoa🇻🇳

   The nuclear mean-field potential arising from the ${}^{12}$C+${}^{12}$C interaction at the low energies relevant for the astrophysical carbon burning process has been constructed within the double-folding model, using the realistic nuclear ground-state density of the ${}^{12}$C nucleus and the effective M3Y nucleon-nucleon (NN) interaction constructed from the G-matrix of the Paris (free) NN potential. To explore the nuclear medium effect, both the original density independent M3Y-Paris interaction and its density dependent CDM3Y6 version have been used in the folding model calculation of the ${}^{12}$C+${}^{12}$C potential. The folded potentials at the different energies were used in the optical model description of the elastic ${}^{12}$C+${}^{12}$C scattering at the energies around and below the Coulomb barrier, as well as in the barrier penetration model to estimate the fusion cross section and astrophysical $S$ factor of the ${}^{12}$C+${}^{12}$C reactions at the low energies. The obtained results are in good agreement with experimental data over a wide range of energies.

   ↳ nucl-thastro-ph.SRnucl-exCommun.in Phys.(2015)·1 citation
2. 02*

   Evolution of Temperature Fluctuation in a Thermal bath and, its implications in Hadronic and Heavy-Ion Collisions

   Trambak Bhattacharya🇺🇸 · Prakhar Garg🇮🇳 · Raghunath Sahoo🇮🇳 · Prasant Samantray🇮🇳

   The evolution equation for inhomogeneous and anisotropic temperature fluctuations inside a medium is derived within the ambit of Boltzmann Transport Equation. Also, taking some existing realistic inputs we have analyzed the Fourier space variation of temperature fluctuation for the medium created after heavy-ion collisions. The effect of viscosity on the variation of fluctuations is investigated. Further, possible implications in hadronic and heavy-ion collisions are explored.

   ↳ hep-phhep-exnucl-exActa Phys.Polon.Supp.(2016)·0 citations
3. 03*

   The q-Statistics and QCD Thermodynamics at LHC

   Trambak Bhattacharyya🇮🇳 · Arvind Khuntia🇮🇳 · Pragati Sahoo🇮🇳 · Prakhar Garg🇮🇳 · Pooja Pareek🇮🇳 · Raghunath Sahoo🇮🇳 · Jean Cleymans🇿🇦

   We perform a Taylor series expansion of Tsallis distribution by assuming the Tsallis parameter $q$ close to 1. The $q$ value shows the deviation of a system from a thermalised Boltzmann distribution. By taking up to first order in $(q-1)$, we derive an analytical result for Tsallis distribution including radial flow. Further, in the present work, we also study the speed of sound ($c_s$) as a function of temperature using the non-extensive Tsallis statistics for different $q$ values and for different mass cut-offs.

   ↳ hep-phhep-exnucl-exActa Phys.Polon.Supp.(2016)·2 citations
4. 04*

   Indication of Differential Kinetic Freeze-out at RHIC and LHC Energies

   D. Thakur🇮🇳 · S. Tripathy🇮🇳 · P. Garg🇮🇳 · R. Sahoo and🇮🇳 · J. Cleymans🇿🇦

   The transverse momentum spectra at RHIC and LHC for A+A and p+p collisions are studied with Tsallis distributions in different approaches i.e. with and without radial flow. The information on the freeze-out surface in terms of freeze-out volume, temperature, chemical potential and radial flow velocities for different particle species are obtained. These parameters are found to show a systematic behavior with mass dependence. It is observed that the heavier particles freeze-out early as compared to lighter particles and freeze-out surfaces are different for different particles, which is a direct signature of mass dependent differential freeze-out. Further, we observe that the radial flow velocity decreases with increasing mass. This confirms the mass ordering behavior in collectivity observed in heavy-ion collisions. It is also observed that the systems created in peripheral heavy-ion collisions and in proton-proton collisions are of similar thermodynamic nature.

   ↳ hep-phhep-exnucl-exActa Phys.Polon.Supp.(2016)·10 citations
5. 05*

   Event shape analysis in ultrarelativistic nuclear collisions

   Renata Kopecna🇨🇿 · Boris Tomasik🇸🇰

   We present a novel method for sorting events. So far, single variables like flow vector magnitude were used for sorting events. Our approach takes into account the whole azimuthal angle distribution rather than a single variable. This method allows us to determine the good measure of the event shape, providing a multiplicity-independent insight. We discuss the advantages and disadvantages of this approach, the possible usage in femtoscopy, and other more exclusive experimental studies.

   ↳ nucl-thhep-phnucl-exActa Phys.Polon.Supp.(2016)·0 citations
6. 06*

   Counterintuitive Behaviors in Configuration Mixing

   Xiaofei Yu · Larry Zamick🇺🇸 · Shadow Robinson

   By starting with a simple configurations of 2 neutrons in a single j shell we hare able to learn the effects of high lying configurations on physical properties such as nuclear magnetic g factors. Some counterintuitive results are found when both high lying spin orbit partners are allowed to admix with the basic configuration.

   ↳ nucl-thnucl-exphysics.atom-ph0 citations
7. 07*

   Development and prospect of Very Small Angle Neutron Scattering (VSANS) Techniques

   Taisen Zuo · He Cheng🇨🇳 · Yuan-Bo Chen🇨🇳 · Fang-Wei Wang🇺🇸

   Very Small Angle Neutron Scattering (VSANS) is an upgrade of the traditional Small Angle Neutron Scattering (SANS) technique which can cover three orders of magnitude of length scale from one nanometer to one micrometer. It is a powerful tool for structure calibration in polymer science, biology, material science and condensed matter physics. Since the first VSANS instrument, D11 in Grenoble, was built in 1972, new collimation techniques, focusing optics (multi-beam converging apertures, material or magnetic lenses, and focusing mirrors) and higher resolution detectors combined with the long flight paths and long incident neutron wavelengths have been developed. In this paper, a detailed review is given of the development, principles and application conditions of various VSANS techniques. Then, beam current gain factors are calculated to evaluate those techniques. A VSANS design for the China Spallation Neutron Source (CSNS) is thereby presented.

   ↳ physics.ins-detnucl-exCPC(2016)·3 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.