Bulletin of the American Physical Society
Fall 2011 Meeting of the APS Prairie Section
Volume 56, Number 13
Thursday–Saturday, November 10–12, 2011; Cedar Falls, Iowa
Session D1: High Energy Physics |
Hide Abstracts |
Chair: Bob Zwaska, Fermilab Room: UNI Center for Enery and Environmental Education Auditorium |
Friday, November 11, 2011 10:40AM - 11:16AM |
D1.00001: The Electron Cloud as a Limiting Factor for High-Intensity Particle Accelerators Invited Speaker: Bob Zwaska The electron cloud is an accumulation of electrons in the vacuum of an accelerator. These electrons can cause instabilities in the beam and other negative effects in the accelerator. I will describe the electron cloud mechanism and a campaign of experiments at Fermilab to understand the effect and control it for future accelerators. [Preview Abstract] |
Friday, November 11, 2011 11:16AM - 11:28AM |
D1.00002: Photoproduction at Relativistic Heavy Ion Collider with STAR Dilan Madagodahettige Don Relativistic heavy ions carry strong transverse electromagnetic fields which can be treated as sources of quasi-real virtual photons. The ions interact through photon-Pomeron and photon-photon collisions at impact parameter more than twice the nuclear radius, so hadronic interactions are suppressed. We present recent results of the STAR experiment at RHIC on $\rho^{0}(770)$ production in AuAu collisions at various energies. Also we present a new measurement of $J/\psi$ photoproduction in 200 (GeV) AuAu collisions at RHIC. The $p_{T}$ distribution of the $J/\psi$ mesons peaks at very low $p_{T}$, consistent with expectations for coherent photoproduction. Both the photoproduction cross section and the $J/\psi$ rapidity distribution are expected to show the effects of gluon shadowing. A measurement of the ratio of $J/\psi$ to $\rho^{0}$ meson cross sections in 200 (GeV) AuAu collisions, as well as a distribution of rapidity within $\mid y \mid < 1$ for the $J/\psi$ mesons are presented. [Preview Abstract] |
Friday, November 11, 2011 11:28AM - 11:40AM |
D1.00003: Modification of fully reconstructed jets in $\sqrt{s}$=200 GeV $d$+Au collisions at PHENIX Grau Nathan Fully reconstructed jets in d+Au collisions allow the study of the cold nuclear medium such as the nuclear parton distribution function and the multiple-scattering of the partons traversing this medium. In this contribution we present the current results from the PHENIX experiment on fully reconstructed anti-$k_T$ jets using the 2008 $d$+Au dataset. Jets with $p+p$-equivalent jet energy above 15 GeV show a reduction of the rate of these jets in central $d$+Au compared to peripheral $d$+Au collisions. The implication of this data on our understanding of the nuclear wavefunction and cold nuclear matter multiple-scattering models will be discussed. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700