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Full-Text Articles in Physics

First Results From Rhic-Phenix, Tarun Kanti Ghosh, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et Al., Phenix Collaboration Aug 2001

First Results From Rhic-Phenix, Tarun Kanti Ghosh, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et Al., Phenix Collaboration

Physics and Astronomy Conference Papers, Posters and Presentations

The PHENIX experiment consists of a large detector system located at the newly commissioned relativistic heavy ion collider (RHIC) at the Brookhaven National Laboratory. The primary goal of the PHENIX experiment is to look for signatures of the QCD prediction of a deconfined high-energy-density phase of nuclear matter quark gluon plasma. PHENIX started data taking for Au+Au collisions at √sNN = 130 GeV in June 2000. The signals from the beam-beam counter (BBC) and zero degree calorimeter (ZDC) are used to determine the centrality of the collision. A Glauber model reproduces the ZDC spectrum reasonably well to determine the participants ...


Measurement Of The Midrapidity Transverse Energy Distribution From Root(Nn)-N-S=130 Gev Au+Au Collisions At Rhic, K. Adcox, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et Al., Phenix Collaboration Jul 2001

Measurement Of The Midrapidity Transverse Energy Distribution From Root(Nn)-N-S=130 Gev Au+Au Collisions At Rhic, K. Adcox, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et Al., Phenix Collaboration

Physics and Astronomy Publications

The first measurement of energy produced transverse to the beam direction at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory is presented. The midrapidity transverse energy density per participating nucleon rises steadily with the number of participants, closely paralleling the rise in charged-particle density, such that ⟨ET⟩/⟨Nch⟩ remains relatively constant as a function of centrality. The energy density calculated via Bjorken’s prescription for the 2% most central Au+Au collisions at √sNN=130GeV is at least εBj=4.6 GeV/fm3, which is a factor of 1.6 larger than found at √sNN=17.2 GeV ( Pb+Pb ...


Centrality Dependence Of Charged Particle Multiplicity In Au-Au Collisions At Root(S)Nn=130 Gev, K. Adcox, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et. Al, Phenix Collaboration Apr 2001

Centrality Dependence Of Charged Particle Multiplicity In Au-Au Collisions At Root(S)Nn=130 Gev, K. Adcox, Sergey Belikov, John C. Hill, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, Athanasios Petridis, Marzia Rosati, F. K. Wohn, Et. Al, Phenix Collaboration

Physics and Astronomy Publications

We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at roots(NN) = 130 GeV measured with the PHENIX detector at RHIC. For the 5% most central collisions we find dN(ch)/d eta (|eta =0) = 622 +/- 1(stat) +/- 41(syst). The results, analyzed as a function of centrality show a steady rise of the particle density per participating nucleon with centrality.


Search For A Neutral Technicolor Signature In Pp̄ Collisions At [Square Root Of S] = 18 Tev , Jesse Andrew Green Jan 2001

Search For A Neutral Technicolor Signature In Pp̄ Collisions At [Square Root Of S] = 18 Tev , Jesse Andrew Green

Retrospective Theses and Dissertations

The standard model (SM) of particle physics has been a very successful theory for decades; however, several features remain unexplained. One such feature is the mechanism of electro-weak symmetry-breaking. The Higgs mechanism is postulated as part of the SM to give us the masses of the W +/- and the Z0 bosons in a manner consistent with unitarity. The Higgs boson is a consequence of the mechanism currently used. It is massive, and has the quantum numbers of the vacuum; i.e. it is a scalar. Also, the pattern of fermion (quark and lepton) masses is yet to be understood. Technicolor ...


Search For An Msugra Signature In The Electron + Jets + [Missing Transverse Energy] Final State In [Proton-Antiproton] Collisions At [Square Root Of S] = 1.8 Tev , Zhang Zhou Jan 2001

Search For An Msugra Signature In The Electron + Jets + [Missing Transverse Energy] Final State In [Proton-Antiproton] Collisions At [Square Root Of S] = 1.8 Tev , Zhang Zhou

Retrospective Theses and Dissertations

We describe a search for a Minimal Supergravity (mSUGRA) signature in Run 1 data taken by the DO detector at the Fermilab Tevatron from 1995--1996. The total data luminosity is 92.7 pb-1. The data were examined for events with a single electron, four or more jets and large missing transverse energy. The major backgrounds are from W+jets, QCD, tt[macron], and WW events. We observed no excess of events in our data. Based on the data and the expected signal rate we obtain new limits on new physics in terms of mSUGRA model parameters.