Hard scattering and jets--from p-p collisions in the 1970's to Au+Au collisions at RHIC

Hard scattering in p-p collisions, discovered at the CERN ISR in 1972 by the method of leading particles, proved that the partons of Deeply Inelastic Scattering strongly interacted with each other. Further ISR measurements utilizing inclusive single or pairs of hadrons established that high pT particles are produced from states with two roughly back-to-back jets which are the result of scattering of constituents of the nucleons as described by Quantum Chromodynamics (QCD), which was developed during the course of these measurements. These techniques, which are the only practical method to study hard-scattering and jet phenomena in Au+Au central collisions, are reviewed, with application to measurements at RHIC.Comment: 4 pages, 5 figures, Proceedings of Hard Probes 2004, International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions, Nov 4-10, 2004, to appear in EPJ

Ground State Properties of an Asymmetric Hubbard Model for Unbalanced Ultracold Fermionic Quantum Gases

In order to describe unbalanced ultracold fermionic quantum gases on optical lattices in a harmonic trap, we investigate an attractive ($U<0$) asymmetric ($t_\uparrow\neq t_\downarrow$) Hubbard model with a Zeeman-like magnetic field. In view of the model's spatial inhomogeneity, we focus in this paper on the solution at Hartree-Fock level. The Hartree-Fock Hamiltonian is diagonalized with particular emphasis on superfluid phases. For the special case of spin-independent hopping we analytically determine the number of solutions of the resulting self-consistency equations and the nature of the possible ground states at weak coupling. Numerical results for unbalanced Fermi-mixtures are presented within the local density approximation. In particular, we find a fascinating shell structure, involving normal and superfluid phases. For the general case of spin-dependent hopping we calculate the density of states and the possible superfluid phases in the ground state. In particular, we find a new magnetized superfluid phase.Comment: 9 pages, 5 figure

Structures of the f0(980)f_0(980), a0(980)a_0(980) mesons and the strong coupling constants gf0K+K−g_{f_0 K^+ K^-}, ga0K+K−g_{a_0 K^+ K^-} with the light-cone QCD sum rules

In this article, with the assumption of explicit isospin violation arising from the $f_0(980)-a_0(980)$ mixing, we take the point of view that the scalar mesons $f_0(980)$ and $a_0(980)$ have both strange and non-strange quark-antiquark components and evaluate the strong coupling constants $g_{f_0 K^+ K^-}$ and $g_{a_0 K^+ K^-}$ within the framework of the light-cone QCD sum rules approach. The large strong scalar-$KK$ couplings through both the $n\bar{n}$ and $s\bar{s}$ components $g^{\bar{n}n}_{f_0 K^+ K^-}$, $g^{\bar{s}s}_{f_0 K^+ K^-}$, $g^{\bar{n}n}_{a_0 K^+ K^-}$ and $g^{\bar{s}s}_{a_0 K^+ K^-}$will support the hadronic dressing mechanism, furthermore, in spite of the constituent structure differences between the $f_0(980)$ and $a_0(980)$ mesons, the strange components have larger strong coupling constants with the $K^+K^-$ state than the corresponding non-strange ones, $g_{f_0 K^+ K^-}^{\bar{s}s}\approx \sqrt{2}g_{f_0 K^+ K^-}^{\bar{n}n}$ and $g_{a_0 K^+ K^-}^{\bar{s}s}\approx \sqrt{2} g_{a_0 K^+ K^-}^{\bar{n}n}$. From the existing controversial values, we can not reach a general consensus on the strong coupling constants $g_{f_0 K^+ K^-}$, $g_{a_0 K^+ K^-}$ and the mixing angles.Comment: 14 pages; Revised versio

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Application of the Two-Scale Model to the HERMES Data on Nuclear Attenuation

The Two-Scale Model and its improved version were used to perform the fit to the HERMES data for $\nu$ (the virtual photon energy) and z (the fraction of $\nu$ carried by hadron) dependencies of nuclear multiplicity ratios for $\pi^+$ and $\pi^-$ mesons electro-produced on two nuclear targets ($^{14}$N and $^{84}$Kr). The quantitative criterium $\chi ^2$ was used for the first time to analyse the results of the model fit to the nuclear multiplicity ratios data. The two-parameter's fit gives satisfactory agreement with the HERMES data. Best values of the parameters were then used to calculate the $\nu$- and $z$ - dependencies of nuclear attenuation for $\pi^0$, K$^+$, K$^-$ and $\bar{p}$ produced on $^{84}$Kr target, and also make a predictions for $\nu$, z and the Q$^2$ (the photon virtuality) - dependencies of nuclear attenuation data for those identified hadrons and nuclea, that will be published by HERMES

Circular 97

A yield trial in which 43 named varieties and one numbered selection of potatoes were compared was conducted during the 1993 growing season at the University of Alaska Fairbanks, Agricultural and Forestry Experiment Station’s Palmer Research Center, Matanuska Farm, located six miles west of Palmer, Alaska.Potato Variety Performance -- Introduction -- Matanuska Farm Yield Trials: Cultural Practices and Environmental Conditions; Results and Discussion -- Trials at Other Locations in Alaska: General Procedures; Site-Specific Information; Delta Junction; Fairbanks; Homer; Kenai-Soldotna; Nom

Recipient of the 2012 Alumni Distinguished Leadership Award

Alex (Dietrich) Greene has dedicated her life to a career in service. As one of the nation’s first female strike-fighter aviators, Greene is a pioneer and a champion of diversity. She is a founding member of the military’s eMentor program, promoting mentorship and opportunity for future generations of minorities to succeed in untraditional fields. Beginning her career in the U.S. Navy, Greene was rapidly promoted through military ranks for her sophisticated strategic vision and flawless tactical execution. She led the military establishment in policies and programs to not only ensure our national security but also advance the human condition. Greene spearheaded the revolutionary Navy Irregular Warfare strategy, emphasizing the use of indirect, non-conventional military methods rather than direct conventional military confrontation. She directly applied that strategy as a deployed “boots on ground” Provincial Reconstruction Team Engineer, leading reconstruction efforts that established regional stability and security as well as overall legitimacy of the national Government of the Islamic Republic of Afghanistan. Greene is a recipient of the Bronze Star and Air Combat medals. She was formally recognized by Ambassador Eikenberry, Department of State, for her leadership of the Ghazni Female Engagement Team and commitment to a cooperative civil-military mission. A strong supporter of IMSA and the IMSA Fund, Greene returned to campus in 2008 as the Veterans Day guest speaker, captivating and inspiring students with her stories, wisdom and advice. Greene currently serves as an assistant Professor of Naval Science at the George Washington University in Washington D.C. She received her B.S. in Civil Engineering from George Washington University and attended the Defense Language Institute

An advocate for openness

Franklin D. Roosevelt famously said December 7 was “a day that will live in infamy.” He was of course referring to 1941 and the bombing of Pearl Harbor, which killed more than 2,400 U.S. citizens even though the country was a noncombatant in World War II at the time

A Taste of Linfield on Third Street

Acorn to Oak Wine Experience opens as tasting room and so much mor

Summary, DIS 97

Some of the experimental and theoretical results discussed at the Fifth International Workshop on Deep Inelastic Scattering and QCD are reviewed.Comment: 33 pages, LaTeX, 14 eps figures. Summary talk, to appear in Proceedings of the Fifth International Workshop on Deep Inelastic Scattering and QC