Tue·Oct 7, 2014Tuesday·October 7, 2014

1. 01*

   Even-odd effects and Coulomb effects on minimal excitation energy of fragments from low energy fission

   Modesto Montoya🇵🇪

   This work is focused on even-odd effects on the minimal total fragment excitation energy in thermal neutron induced fission of 233U and 235U as well as in spontaneous fission of 252Cf. In a scission model, taking into account the fragment deformation properties and Coulomb interaction between fragments, the expression of the difference between Q-values referred to even/even and odd/odd charge splits, respectively, on the corresponding difference between the minimal total fragment excitation energy is studied.

   nucl-ex2 citations
2. 02*

   Neutron-Antineutron Oscillations: Theoretical Status and Experimental Prospects

   D. G. Phillips II🇺🇸 · W. M. Snow🇺🇸 · K. Babu🇺🇸 · S. Banerjee🇮🇳 · D. V. Baxter🇺🇸 · Z. Berezhiani🇮🇹 · M. Bergevin🇺🇸 · S. Bhattacharya🇮🇳 · G. Brooijmans🇺🇸 · L. Castellanos🇺🇸 · M-C. Chen🇺🇸 · C. E. Coppola🇺🇸 and 51 other authors

   This paper summarizes the relevant theoretical developments, outlines some ideas to improve experimental searches for free neutron-antineutron oscillations, and suggests avenues for future improvement in the experimental sensitivity.

   ↳ hep-exhep-phnucl-exnucl-th+1Phys.Rept.(2016)·238 citations
3. 03*

   The parity-violating nucleon-nucleon force in the 1/N_c expansion

   Daniel R. Phillips🇺🇸 · Daris Samart🇹🇭 · Carlos Schat🇦🇷

   Several experimental investigations have observed parity violation in nuclear systems-a consequence of the weak force between quarks. We apply the $1/N_c$ expansion of QCD to the P-violating T-conserving component of the nucleon-nucleon (NN) potential. We show there are two leading-order operators, both of which affect $\vec{p}p$ scattering at order $N_c$. We find an additional four operators at $O(N_c^0{\sin }^2{\theta }_W)$ and six at $O(1/N_c)$. Pion exchange in the PV NN force is suppressed by $1/N_c$ and ${\sin }^2{\theta }_W$, providing a quantitative explanation for its non-observation up to this time. The large-$N_c$ hierarchy of other PV NN force mechanisms is consistent with estimates of the couplings in phenomenological models. The PV observed in $\vec{p}p$ scattering data is compatible with natural values for the strong and weak coupling constants: there is no evidence of fine tuning.

   ↳ nucl-thhep-phnucl-exPRL(2015)·47 citations
4. 04*

   Radiation and Ionization Energy Loss Simulation for GDH Sum Rule Experiment in Hall-A at Jefferson Lab

   Xin-Hu Yan · Yun-Xiu Ye Jian-Ping Chen · Hai-Jiang LV · Pengjia Zhu · Fengjian Jiang

   The radiation and ionization energy loss are presented for single arm Monte Carlo simulation for the GDH sum rule experiment in Hall-A at Jefferson Lab. Radiation and ionization energy loss are discussed for ${}^{12}C$ elastic scattering simulation. The relative momentum ratio $\frac{\Delta p}{p}$ and ${}^{12}C$ elastic cross section are compared without and with Radiation Energy Loss and a reasonable shape is obtained by the simulation. The total energy loss distribution is obtained, showing a Landau shape for ${}^{12}C$ elastic scattering. This simulation work will give good support for radiation correction analysis of the GDH sum rule experiment.

   ↳ physics.ins-detnucl-exCPC(2015)·0 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.