Search for Physics beyond the Standard Model at the Tevatron

Recent searches for physics beyond the standard model at the Tevatron are reported, with emphasis on supersymmetry.Comment: to appear in Proceedings of SUSY06, the 14th International Conference on Supersymmetry and the Unification of Fundamental Interactions, UC Irvine, California, 12-17 June 200

Using the Balance Function to study the charge correlations of hadrons

We present the recent Balance Function (BF) results obtained by the NA49 collaboration for the pseudo-rapidity dependence of non-identified charged particle correlations for two SPS energies. Experimental results indicate a clear centrality dependence only in the mid-rapidity region. The results of an energy dependence study of the BF throughout the whole SPS energy range will also be discussed. In addition, the correlation of identified hadrons is studied and presented for the first time. The study of hadron correlation has also been extended in order to cope with the high multiplicity environment that is expected to be seen at LHC. We will present the latest results from simulations concerning the extension of these studies to the ALICE experiment.Comment: To appear in the proccedings of the "Quark Confinement and Hadron Spectrum VII" conferenc

Charged Particle Production at High Rapidity in p+p Collisions at RHIC

This report describes the recent analysis of identified charged particle production at high rapidity performed on data collected from p+p collisions at RHIC (sqrt{s}=200 GeV). The extracted invariant cross-sections compare well to NLO pQCD calculations. However, a puzzling high yield of protons at high rapidity and p_T has been found.Comment: 5 pages, four figures. The labels of the x-axis in figure 1 have been correcte

Heavy Flavor Production at PHENIX at RHIC

A study of heavy flavor production in different collision systems in various kinematic regions presents an opportunity to probe cold nuclear medium and hot dense matter effects. Results from the PHENIX experiment on $J/\psi$ and open charm production in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ =200 GeV are presented. The data show strong $J/\psi$ suppression in central AA collisions, similar to NA50 results, and strong suppression in high $p_T$ open charm production. The $J/\psi$ production in Au+Au and d+Au collisions is compared to understand the cold nuclear medium effects. The data show significant cold nuclear effects in charm production in d+Au collisions at forward and backward rapidity ranges.Comment: 4 pages, 3figures, CIPANP2006, May 29-June 3, 2006. San Juan, PuertoRic

IRSF/SIRIUS JHKs near-infrared variable star survey in the Magellanic Clouds

We carried out a NIR variable star survey toward the Large and Small Magellanic Clouds using the InfraRed Survey Facility (IRSF) at Sutherland, South African Astronomical Observatory. This survey project was initiated in Dember 2000, and since then, we kept monitoring a total area of 3 square degrees along the LMC bar and also an area of 1 square degree around the center of the SMC, sufficiently large to do statistical analysis and to make complete catalog of variable red giants in the Magellanic Clouds. The detection limits (S/N=10) of the survey are 17.0, 16.5 and 15.5 at J, H and Ks, respectively. In this article, we present some results on infrared variables that are not detected by the previous optical surveys. We show that they do not fall on the standard period-Ks magnitude relation for Mira-type variables pulsating in the fundamental mode.Comment: 3 pages, 2 figures. To appear in "Stellar Pulsation: Challenges for Theory and Observation", Eds. J. Guzik and P. Bradle

High Rapidity Physics with the BRAHMS Experiment

We report the study of the nuclear modification factor R_{AuAu} as function of pT and pseudo-rapidity in Au+Au collisions at top RHIC energy. We find this quantity almost independent of pseudo-rapidity. We use the pbar/pi- ratio as a probe of the parton density and the degree of thermalization of the medium formed by the collision. The pbar/pi- ratio has a clear rapidity dependence. The combination of these two measurements suggests that the pseudo-rapidity dependence of the R_{AuAu results from the competing effects of energy loss in a dense and opaque medium and the modifications of the wave function of the high energy beams in the initial state.Comment: 5 pages, four figures, to appear in the proceedings of the 9th Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2006), Puerto Rico, 30 May - 3 June 200

Prospects for SUSY searches in CMS and ATLAS

We discuss how the CMS and ATLAS experiments are preparing for the analysis of first LHC data with emphasis on the search for supersymmetry. We will show the importance of the understanding of detector, trigger, reconstruction and backgrounds, and we will present realistic estimates of the reach of CMS and ATLAS.Comment: 9 pages, 12 figures. Contribution to the proceedings of the 16th international conference on supersymmetry and the unification of fundamental interactions, SUSY08, Seoul, Korea, June 16-21, 200

Σ−\Sigma^- Photoproduction on the Neutron: Results from CLAS

As part of a broader study of kaon photoproduction on deuterium, the $\gamma n \to K^{+} \Sigma^{-}$ channel was investigated. The data were acquired at Jefferson Lab using the CLAS detector and the Photon-Tagging Facility installed in Hall B. The photon energy range covered was from 0.50 to 2.95 GeV. For the present analysis, the $\gamma n \to K^{+} \Sigma^{-}$ channel was identified by detecting the positive kaon in coincidence with both decay products of the $\Sigma^-$ hyperon, $\pi^-$ and $n$. Preliminary differential cross--sections are shown as a function of the invariant energy W and the kaon polar angle in the center of mass system.Comment: 9 pages, 5 figures, INPC2001 proceeding

Towards a cosmopolitan criticality: Relational aesthetics, Rirkrit Tiravanija and transnational encounters with <i>pad thai</i>

Marsha Meskimmon and Nikos Papastergiadis have responded to contemporary art’s concern with transculturalism, audience participation and intersubjectivity by re-articulating the cosmopolitan in relation to both aesthetics and globalisation. Dohmen investigates how their cosmopolitanism translates into a mode of critical address and probes this question with regard to the work of Rirkrit Tiravanija, a key proponent of relational aesthetics, an art movement of the 1990s championing audience participation and the intersubjective. Even though Tiravanija expressly draws attention to his Thai background by cooking pad thai in the gallery, Dohmen detects a striking disavowal of cultural alterity at the heart of relational aesthetics, which she regards as untenable within the context of the art world’s increasing internationalisation. Dohmen demonstrates how relational aesthetics appropriated key aspects of Tiravanija’s Thai-derived outlook while asking how a cosmopolitan outlook might redress and repair this marked critical Eurocentricity

On the Relationship between Two Notions of Compatibility for Bi-Hamiltonian Systems

Bi-Hamiltonian structures are of great importance in the theory of integrable Hamiltonian systems. The notion of compatibility of symplectic structures is a key aspect of bi-Hamiltonian systems. Because of this, a few different notions of compatibility have been introduced. In this paper we show that, under some additional assumptions, compatibility in the sense of Magri implies a notion of compatibility due to Fass\`o and Ratiu, that we dub bi-affine compatibility. We present two proofs of this fact. The first one uses the uniqueness of the connection parallelizing all the Hamiltonian vector fields tangent to the leaves of a Lagrangian foliation. The second proof uses Darboux-Nijenhuis coordinates and symplectic connections