Tue·Aug 1, 2017Tuesday·August 1, 2017

1. 01*

   The ${}^{12}$C(n, 2n)${}^{11}$C cross section from threshold to 26.5 MeV

   M. Yuly (1)🇺🇸 · T. Eckert (1)🇺🇸 · G. Hartshaw (1)🇺🇸 · S. J. Padalino (2)🇺🇸 · D. N. Polsin (2)🇺🇸 · M. Russ (2)🇺🇸 · A. T. Simone (2)🇺🇸 · C. R. Brune (3)🇺🇸 · T. N. Massey (3)🇺🇸 · C. E. Parker (3)🇺🇸 · R. Fitzgerald (4)🇺🇸 · T. C. Sangster (5)🇺🇸 · S. P. Regan (5) ((1) Houghton College, (2) State University of New York, Geneseo, (3) Ohio University, (4) National Institute of Standards and Technology Gaithersburg and (5) Laboratory for Laser Energetics, University of Rochester)🇺🇸

   The ${}^{12}$C(n, 2n)${}^{11}$C cross section was measured from just below threshold to 26.5 MeV using the Pelletron accelerator at Ohio University. Monoenergetic neutrons, produced via the ${}^3$H(d,n)${}^4$He reaction, were allowed to strike targets of polyethylene and graphite. Activation of both targets was measured by counting positron annihilations resulting from the ${\beta }^{+}$ decay of ${}^{11}$C. Annihilation gamma rays were detected, both in coincidence and singly, using back-to-back NaI detectors. The incident neutron flux was determined indirectly via ${}^1$H(n,p) protons elastically scattered from the polyethylene target. Previous measurements fall into upper and lower bands, the results of the present measurement are consistent with the upper band.

   nucl-exPRC(2018)·2 citations
2. 02*

   Jet-medium interaction and conformal relativistic fluid dynamics

   Li Yan🇨🇦 · Sangyong Jeon🇨🇦 · Charles Gale🇨🇦

   A formalism to study the mode-by-mode response to the energy deposition of external hard partons propagating in a relativistic fluid is developed, based on a semi-analytical solution of conformal fluid-dynamics. The soft particle production resulting from the jet-medium interaction is calculated and the recoil of the viscous medium is studied for different orientations of the relativistic jets, and for different values of the specific shear viscosity $\eta /s$.

   ↳ nucl-thhep-phnucl-exPRC(2018)·31 citations
3. 03*

   The Bose-Einstein Correlations and the strong coupling constant at low energies

   G. Alexander (Tel Aviv University)🇮🇱 · B. Blok (Technion)🇮🇱

   It is shown that ${\alpha }_s(E)$, the strong coupling constant, can be determined in the non-perturbative regime from Bose-Einstein correlations (BEC). The obtained ${\alpha }_s(E)$ is in agreement with the prescriptions dealt with in the Analytic Perturbative Theory approach. It also extrapolates smoothly to the standard perturbative ${\alpha }_s(E)$ at higher energies. Our results indicate that BEC dimension can be considered as an alternative approach to the short range measure between hadrons.

   ↳ hep-phhep-exnucl-exMDPI Physics(2019)·0 citations
4. 04*

   Non-critical fluctuations of (net) charges and (net) protons from iEBE-VISHNU hybrid model

   Jixing Li🇨🇳 · Hao-jie Xu🇨🇳 · Huichao Song🇺🇸

   In this paper, we investigate the non-critical fluctuations of (net) charges and (net) protons in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 39 and 200 GeV, using iEBE-VISHNU hybrid model with Poisson fluctuations added in the particle event generator between hydrodynamics and UrQMD. Various effects, such as volume fluctuations hadronic evolution and scatterings, resonance decays, as well as realistic centrality cuts and acceptance cuts have been embedded in our model calculations. With properly tuned parameters, iEBE-VISHNU roughly describe the centrality dependent moments and cumulants of (net) charges and (net) protons measured in experiment. Further comparison simulations show that the volume fluctuation is the dominant factor to influence the multiplicity fluctuations, which makes the higher moments of (net) charges largely deviate from the Poison baselines. We also find that the effects from hadronic evolutions and resonance decays are pretty small or even negligible for the multiplicity fluctuations of both (net) charges and (net) protons.

   ↳ nucl-thhep-phnucl-exPRC(2018)·22 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.