Fri·Jul 29, 2011Friday·July 29, 2011

1. 01*

   Double beta decay experiments

   A.S. Barabash🇷🇺

   The present status of double beta decay experiments is reviewed. The results of the most sensitive experiments are discussed. Proposals for future double beta decay experiments with a sensitivity to the $<m_{\nu }>$ at the level of (0.01--0.1) eV are considered.

   nucl-exPhys.Part.Nucl.(2011)·60 citations
2. 02*

   Study of transfer reaction channel in ${}^{12}$C + ${}^{27}$Al system

   Aparajita Dey · M. Biswas🇮🇳 · C. Bhattacharya🇮🇳 · T. K. Rana🇮🇳 · S. Kundu🇮🇳 · K. Banerjee🇮🇳 · S. Bhattacharya🇮🇳 · T. K. Ghosh🇮🇳 · G. Mukherjee🇮🇳 · J. K. Meena · D. Gupta🇮🇳 · P. Mali🇮🇳 and 11 other authors

   The 1p transfer channel in the ${}^{27}$Al(${}^{12}$C, ${}^{11}$B)${}^{28}$Si reaction has been studied at E${}_{lab}$ = 73, 81 and 85 MeV. The finite range distorted wave Born approximation calculations have been performed using phenomenological optical model potential to analyze the angular distributions for 3 transitions populating the 0.0, 1.78 and 4.62 MeV states of ${}^{28}$Si and 2 transitions populating the 2.12 and 4.44 MeV states of ${}^{11}$B via the ${}^{27}$Al(${}^{12}$C, ${}^{11}$B)${}^{28}$Si reaction. The spectroscopic strengths as well as spectroscopic factors have been extracted for all the five states. The extracted strength values are compared with shell model calculations.

   nucl-ex0 citations
3. 03*

   System size dependence of nuclear modification and azimuthal anisotropy of jet quenching

   Somnath De🇮🇳 · Dinesh K. Srivastava🇮🇳

   We investigate the system size dependence of jet-quenching by analyzing transverse momentum spectra of neutral pions in Au+Au and Cu+Cu collisions at $\sqrt{s_{\text{NN}}}$ =200 GeV for different centralities. The fast partons are assumed to lose energy by radiating gluons as they traverse the plasma and undergo multiple collisions. The energy loss per collision, $ϵ$, is taken as proportional to $E$(where $E$ is the energy of the parton), proportional to $\sqrt{E}$, or a constant depending on whether the formation time of the gluon is less than the mean path, greater than the mean free path but less than the path length, or greater than the path length of the partons, respectively. NLO pQCD is used to evaluate pion production by modifying the fragmentation function to account for the energy loss. We reproduce the nuclear modification factor $R_{\text{AA}}$ by treating $ϵ$ as the only free parameter, depending on the centrality and the mechanism of energy loss. These values are seen to explain the nuclear modification of prompt photons, caused by the energy lost by final state quarks before they fragment into photons. These also reproduce the azimuthal asymmetry of transverse momentum distribution for pions within a factor of two and for prompt photons in a fair agreement with experimental data.

   ↳ nucl-thhep-phnucl-exJ.Phys.G(2012)·15 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.