Lambda- and antilambda production at CERN-SPS energies

Vortrag gehalten an der Tagung "The XVI International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, organized by SUBATECH Laboratory", in Nantes, France, 18-24 Juli 2002

Open heavy flavour nuclear modification factor in ALICE

The ALICE experiment has measured charm and beauty production in pp and Pb-Pb collisions at sqrt(s) = 2.76 and 7 TeV and sqrt(sNN) = 2.76 TeV, respectively, via the exclusive reconstruction of hadronic D meson decays and semi-leptonic D and B meson decays. In this contribution, recent results on the nuclear modification factor for open charmed mesons and heavy-flavour decay electrons at central rapidity and muons at forward rapidity are presented and discussed.Comment: 10 pages, 11 figures, Proceedings of the 50th International Winter Meeting on Nuclear Physics, Bormio (Italy), 23-27 January 2012, accepted for publication in Proceedings of Scienc

High-pT hadron production and triggered particle correlations

The STAR experiment at the Relativistic Heavy-Ion Collider has performed measurements of high transverse momentum particle production in ultra-relativistic heavy-ion collisions. High-pT hadrons are generated from hard parton scatterings early in the collision. The outgoing partons probe the surrounded hot and dense matter through interactions. Recent results on high-pT inclusive particle production and leading particle correlations in p+p, d+Au and Au+Au collisions at sqrt(s_NN) = 200 GeV are reviewed.Comment: 4 pages, 4 figures. Invited talk at XLIst Rencontres de Moriond (QCD and Hadronic interactions), La Thuile, Italy, March 18-25, 200

Heavy-flavour production in pp and Pb-Pb collisions at ALICE

In this contribution, recent ALICE measurements of the production cross section of single electrons, single muons and open charmed mesons in proton-proton collisions at sqrt(s) = 7 TeV are reported. The data are compared to next-to-leading-order perturbative QCD calculations. First open charm signals in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV are shown.Comment: Proceedings, 46th Rencontres de Moriond QCD, La Thuille (Italy), March 2011; 4 pages, 5 figure

Topological reconstruction of open charm mesons using electron tagging

We present first results on the topological reconstruction of open charm mesons in p+p collisions at \snn = 200 GeV using electron tagging. The analysis makes use of the full acceptance of the STAR electromagnetic calorimeter during Run VI data taking. A clear D$^0$ signal is obtained with a remarkable signal-to-background ratio of about 1/7 and a signal significance of about 4. The azimuthal correlation distribution of the subleading electrons associated with open charm mesons exhibits a two-peak structure. We found first indications for prompt charm meson pair production. This correlation technique allows detailed energy loss measurements of open charm mesons in heavy-ion collisions.Comment: 8 pages, 4 figures. Proceedings for the 23rd Winter Workshop on Nuclear Dynamics, Big Sky (Montana), USA, 11-18 February 200

Recent heavy flavor results from STAR

We report on recent heavy flavor measurements from the STAR experiment at RHIC. The measured charm cross section in heavy-ion collisions scales with the number of binary collisions, which is an indication for exclusive charm production in the initial state of the collision. The observed strong suppression of non-photonic electrons at high \pt in Au+Au collisions together with the azimuthal correlation measurements in p+p collisions imply a suppression of $B$ production in heavy-ion collisions. We also present recent measurements of the $\Upsilon$ cross section in p+p collisions.Comment: Invited talk. Proceedings of the 15th annual workshops on Deep-Inelastic Scattering (DIS) and Related Subjects, Munich, 16-20 April 2007. 4 pages, 4 figure

Overview on heavy flavour measurements in lead-lead collisions at the CERN-LHC

High energy collisions of heavy atomic nuclei allow to create and carefully study a high-density, colour-deconfined state of strongly-interacting matter. According to calculations from lattice Quantum-Chromodynamics, under the conditions of high energy density and temperature reached in such collisions, the phase transition to a quark-gluon plasma (QGP) is expected to occur, where the colour confinement of quarks and gluons into hadrons should vanish and chiral symmetry should be restored. Heavy-flavour particles, containing charm and beauty, are unique probes of the conditions of the medium formed in nucleus-nucleus collisions at high energy. In this report recent measurements on open and hidden heavy-flavour production in lead-lead collisions at CERN's Large Hadron Collider are presented and discussed.Comment: 8 pages, 4 figures, proceedings for Xth Quark Confinement and the Hadron Spectrum, 8-12 October 2012, TUM Campus Garching, Munich, German

High transverse momentum inclusive neutral pion production in d+Au collisions at RHIC

Preliminary results are presented on high-pT inclusive neutral pion production in d+Au collisions at sqrt(sNN) = 200 GeV in the pseudo-rapidity range 0 gamma,gamma are detected in the Barrel electromagnetic calorimeter of the STAR experiment at RHIC. The analysis procedure is described in detail and the results are found to be in good agreement with earlier STAR findings and with next-to-leading order perturbative QCD calculations.Comment: 4 pages, 3 figures, poster proceedings of Quark Matter conference, Budapest (Hungary), 4-9 August 200

Non-photonic electron-hadron azimuthal correlation for AuAu, CuCu and pp collisions at sNN=200\sqrt{s_{NN}}=200 GeV

We present preliminary STAR results of azimuthal correlations between non-photonic electrons and hadrons in AuAu, CuCu and pp at $\sqrt{s_{NN}}=200$ GeV. Comparison of the e-h correlations from these colliding systems allows one to study the system-size dependence of heavy quark jet-medium interactions. We also report on the relative charm and bottom contributions to non-photonic electrons extracted from correlations measured in pp collisions. Our results, when combined with $R_{AA}$ measurements of non-photonic electrons, constrain the charm and bottom energy loss in the dense medium.Comment: 4 pages 3 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee. v4 has beautified figures for the CuCu and AuAu e-h correlations, no other chang

A Critical Analysis of Media Images Depicting the New Athletic Body Ideal and One Woman’s Experience with Them

The idea body type for women in the United States now requires not only a thin physique, but visible muscle definition and fitness, as well. This athletic body type must still poses feminine qualities such as large breasts, a small frame, and curves. This new level of perfection has been created by advertisements, fitness magazines, and internet memes. However, this ideal body type is still computer generated, created from parts of multiple women, and largely unobtainable. Since its emergence, little research has critically assessed these images and their effects of women’s self-evaluations. A feminist perspective will used to determine what these advertisements, photographs, and memes are really conveying to women. A sample size of 50 advertisements will be used and patterns will be identified such as extremely fit and thin bodies, emphasis on impossible levels of socially defined beauty, and the sexualization of the female body. Auto-ethnographic findings are expected to indicate that these images lead to internalization and idolization, which result in feelings of shame, guilt, embarrassment, excessive exercising, and dieting in pursuit of this impossible physique. Though this study focuses on a single woman’s experience with these images, it has large implications for women everywhere. Those who internalize these images may experience similar psychological discomfort and physical injury in pursuit of an impossible ideal. Education provided by this study could deter such harms and prevent psychological and biological issues associated with striving for this new ideal body type