98 research outputs found
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MEASURING GLOBAL OBSERVABLES WITH PHENIX.
No full textWhen the Relativistic Heavy-Ion Collider (RHIC) begins operations, it will be capable of colliding nuclei of various sizes, from protons up to Au, at center-of-mass energies of 200 to 500 GeV per nucleon pair. Some of these collisions are expected to produce a new state of matter, the quark-gluon plasma (QGP), in which quarks are no longer confined to individual hadrons and in which chiral symmetry has been restored. Numerous predictions have been made as to how a phase transition to a QGP would affect the particle spectra produced in these collisions (see, for example, a recent review by Harris and Mueller). The PHENIX physics philosophy is to detect and systematically study the QGP via a simultaneous measurement of many different probes/signatures of the plasma, as a function of the energy density achieved in the nucleus-nucleus collision. To achieve this goal, the PHENIX detector has been designed as a multi-purpose spectrometer, capable of concurrently measuring hadrons, leptons and photons, as well as global properties of the collision, e.g. energy density, as will be detailed below
Pramana - Journal of Physics: A scientometric analysis
No full textFocuses on publishing trend; impact factor; authorship pattern; types of articles; institutional collaboration of authors; affiliated institutions of authors; countries of contributing authors; keyword analysis; and referencing pattern. The number of articles being published in Pramana and its ISI impact factor are increasing.
There is an upward trend in number of collaborated papers. Authors from University of Delhi, Delhi; Bhabha Atomic Research Centre, Mumbai, India; Physical Research Laboratory, Ahmedabad, India; Institute of Physics, Bhubaneswar, India; Indian Institute of Science, Bangalore, India; Tata Institute of Fundamental Research, Mumbai, India etc. contributed most number of articles.
One fourth of the total articles published in Pramana are from out side India, the host country of the journal and the number of articles submitting from other countries is also increasing. Cosmology; Supersymmetry; Chaos; Quantum Chromodynamics; Phase Transition; and Quark-Gluon Plasma
are the leading micro-fields of physics to which maximum number of articles published in Pramana.
The average number of references per article is found as 21.85 and it is 104.4 when the average is taken only for review articles
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The PHENIX experiment at RHIC
No full textThe physics emphases of the PHENIX collaboration and the design and current
status of the PHENIX detector are discussed. The plan of the collaboration for
making the most effective use of the available luminosity in the first years of
RHIC operation is also presented
Improving constraints on gluon spin-momentum correlations in transversely polarized protons via midrapidity open-heavy-flavor electrons in p ↑+p collisions at s =200 GeV [Elektronisk resurs]
No full textPolarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure of the proton. Midrapidity open-heavy-flavor production at s=200 GeV is dominated by gluon-gluon fusion, providing heightened sensitivity to gluon dynamics relative to other production channels. Transverse single-spin asymmetries of positrons and electrons from heavy-flavor hadron decays are measured at midrapidity using the PHENIX detector at the Relativistic Heavy Ion Collider. These charge-separated measurements are sensitive to gluon correlators that can in principle be related to gluon orbital angular momentum via model calculations. Explicit constraints on gluon correlators are extracted for two separate models, one of which had not been constrained previously. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3
Heavy flavor production in PHENIX
No full textO. Drapier on behalf of the PHENIX Collaboration, EIThe PHENIX experiment at RHIC measured single electron spectra in p + p, d + Au and Au + Au collisions at GeV, and in Au + Au collisions at GeV. In these spectra, electrons from semi-leptonic decays of charmed particles are the dominant contribution after subtraction of all 'photonic' sources (photon conversions, Dalitz decays, decays of light vector mesons). The p + p open charm production cross-section is found to be in good agreement with pQCD NLO calculations. The shape of the distributions obtained for p + p interactions is compared with those observed for nucleus-nucleus collisions. From p + p to d + Au and Au + Au interactions, open charm production is found to scale with the number of binary collisions . Au + Au data at GeV is compatible with the ISR p + p results scaled by . The elliptic flow parameter v2 of heavy flavor electrons has also been measured, and is found to be non-zero in the intermediate pT range
Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized p+p collisions at s =200 GeV
No full textIn 2015, the PHENIX collaboration has measured very forward (η>6.8) single spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus collisions at a center of mass energy of 200 GeV. A previous publication from this dataset concentrated on the nuclear dependence of such asymmetries. In this measurement the explicit transverse momentum dependence of inclusive neutron single spin asymmetries for proton-proton collisions is extracted using a bootstrapping unfolding technique on the transverse momenta. This explicit transverse momentum dependence will help improve the understanding of the mechanisms that create these asymmetries. © 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3
Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
No full text510 authors, 127 pages text, 56 figures, 1 tables, LaTeX. To be submitted to Nuclear Physics A as a regular article. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html - EIExtensive experimental data from high-energy nucleus-nucleus collisions were recorded using the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The comprehensive set of measurements from the first three years of RHIC operation includes charged particle multiplicities, transverse energy, yield ratios and spectra of identified hadrons in a wide range of transverse momenta (p_T), elliptic flow, two-particle correlations, non-statistical fluctuations, and suppression of particle production at high p_T. The results are examined with an emphasis on implications for the formation of a new state of dense matter. We find that the state of matter created at RHIC cannot be described in terms of ordinary color neutral hadrons
PHENIX Collaboration authorship list for the conference "Quark Matter 2022"
No full textA curated author list for materials and publications related to the conference "Quark Matter 2022"
Improving constraints on gluon spin-momentum correlations in transversely polarized protons via midrapidity open-heavy-flavor electrons in p ↑+p collisions at s =200 GeV
No full textPolarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure of the proton. Midrapidity open-heavy-flavor production at s=200 GeV is dominated by gluon-gluon fusion, providing heightened sensitivity to gluon dynamics relative to other production channels. Transverse single-spin asymmetries of positrons and electrons from heavy-flavor hadron decays are measured at midrapidity using the PHENIX detector at the Relativistic Heavy Ion Collider. These charge-separated measurements are sensitive to gluon correlators that can in principle be related to gluon orbital angular momentum via model calculations. Explicit constraints on gluon correlators are extracted for two separate models, one of which had not been constrained previously. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3
The BaBar detector: Upgrades, operation and performance
No full textContains fulltext :
121729.pdf (Author’s version preprint ) (Open Access
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