Tue·Aug 2, 2011Tuesday·August 2, 2011

1. 01*

   Probing Nuclear Matter With Jets and $\gamma$-Hadron Correlations: Results from PHENIX

   N. Grau (for the PHENIX Collaboration)🇺🇸

   Fully reconstructed jets and direct photon-tagged jet fragments significantly reduce energy-loss bias, the bias toward mostly measuring particles from partons which suffer little energy loss. In d+Au collisions, one accesses the physics at large $x$, which yields important constraints for nuclear parton distribution functions. In both d+Au and A+A collisions, coherent multiple-scattering models of energy loss can be tested. In this contribution, we present the current results from the PHENIX experiment on fully reconstructed jets and direct $\gamma$-hadron correlations. Baseline measurements of jets in p+p collisions as well as their yield and correlation modifications in d+Au and Cu+Cu will be given. From $\gamma$-hadron correlations, we present the fragmentation function in p+p and Au+Au collisions and its modification in Au+Au to $z_T$ lower than what has previously been studied. Implications of this data on our understanding of both cold and hot, dense nuclear matter created at RHIC are discussed.

   nucl-exJ.Phys.G(2011)·7 citations
2. 02*

   Emission Characteristics of the Projectile Fragments at Relativistic Energy

   M. K. Singh🇮🇳 · A. K. Soma🇮🇳 · Ramji Pathak🇮🇳 · V. Singh🇮🇳

   A projectile (84^Kr_36) having kinetic energy around 1 A GeV was used to expose NIKFI BR-2 emulsion target. A total of 700 inelastic events are used in the present studies on projectile fragments. The emission angle of the projectile fragments are strongly affected by charge of the other projectile fragments emitted at same time with different emission angle is observed. The angular distribution studies show symmetrical nature for lighter charge projectile fragments. The symmetrical nature decreased with the charge of projectile fragments. At ~4o of emission angle for double charge projectile fragments, the momentum transfer during interaction is similar for various target species of emulsion were observed. We also observed a small but significant amplitude peaks on both side of the big peak for almost all light charge projectile fragments having different delta angle values. It reflects that there are few percent of projectile fragments that are coming from the decay of heavy projectile fragments or any other process.

   nucl-exIndian J.Phys.(2013)·11 citations
3. 03*

   Effect of Sigma-beam Asymmetry Data on Fits to Single Pion Photoproduction off Neutron

   I.I. Strakovsky🇺🇸 · R.A. Arndt🇺🇸 · W.J. Briscoe🇺🇸 · M.W. Paris🇺🇸 · R.L. Workman (GWU)🇺🇸

   We investigate the influence of new GRAAL Sigma-beam asymmetry measurements on the neutron in multipole fits to the single-pion photoproduction database. Results are compared to those found with the addition of a double-polarization quantity associated with the sum rule.

   ↳ nucl-thhep-exhep-phnucl-exAIP Conf.Proc.(2012)·0 citations
4. 04*

   EBAC-DCC Analysis of World Data of pi N, gamma N, and N(e,e') Reactions

   H. Kamano🇺🇸 · T.-S. H. Lee🇺🇸

   The development, results, and prospect of the Dynamical Coupled-Channels analysis at Excited Baryon Analysis Center (EBAC-DCC) are reported.

   ↳ nucl-thhep-phnucl-exAIP Conf.Proc.(2012)·11 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.