K. A. Drees
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View article: Hadron Storage Ring Transition Crossing for Yellow Only Configuration
Hadron Storage Ring Transition Crossing for Yellow Only Configuration Open
View article: Disentangling Centrality Bias and Final-State Effects in the Production of High-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>T</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> Neutral Pions Using Direct Photon in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> Collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Disentangling Centrality Bias and Final-State Effects in the Production of High- Neutral Pions Using Direct Photon in Collisions at Open
PHENIX presents a simultaneous measurement of the production of direct γ and π^{0} in d+Au collisions at sqrt[s_{NN}]=200 GeV over a p_{T} range of 7.5 to 18 GeV/c for different event samples selected by event activity, i.e., charged-parti…
View article: Status of the second interaction region design for Electron-Ion Collider
Status of the second interaction region design for Electron-Ion Collider Open
Provisions are being made in the Electron Ion Collider (EIC) design for future installation of a second Interaction Region (IR), in addition to the day-one primary IR. The envisioned location for the second IR is the existing experimental …
View article: Progress on the design of the interaction region of the Electron-Ion Collider EIC
Progress on the design of the interaction region of the Electron-Ion Collider EIC Open
We present an update on the design of the Interaction Region (IR) for the the Electron Ion Collider (EIC) being built at Brookhaven National Laboratory (BNL). The EIC will collide high energy and highly polarized hadron and electron beams …
View article: The EIC accelerator: design highlights and project status
The EIC accelerator: design highlights and project status Open
The design of the electron-ion collider (EIC) at Brookhaven National Laboratory is well underway, aiming at a peak electron-proton luminosity of 10e+34 cm^-1·sec^-1. This high luminosity, the wide center-of-mass energy range from 29 to 141…
View article: STATUS OF THE SECOND INTERACTION REGION DESIGN FOR ELECTRON-ION COLLIDER
STATUS OF THE SECOND INTERACTION REGION DESIGN FOR ELECTRON-ION COLLIDER Open
Provisions are being made in the Electron Ion Collider (EIC) design for future installation of a second Interaction Region (IR), in addition to the day-one primary IR. The envisioned location for the second IR is the existing experi- menta…
View article: Erratum: Lévy-stable two-pion Bose-Einstein correlations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:math> GeV <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Au</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">Au</mml:mi></mml:math> collisions [Phys. Rev. C <b>97</b>, 064911 (2018)]
Erratum: Lévy-stable two-pion Bose-Einstein correlations in GeV collisions [Phys. Rev. C <b>97</b>, 064911 (2018)] Open
We previously published in 2018 a detailed measurement recorded in 2010 for Au+Au collisions at $\\sqrt{^SNN}$ = 200 GeV of charged two-pion correlation functions in 0%-30% centrality. We found the data to be well described by Bose-Einstei…
View article: Design status of the Electron-Ion Collider
Design status of the Electron-Ion Collider Open
The Electron-Ion Collider is gearing up for "Critical Decision 2", the project baseline with defined scope, cost and schedule. Lattice designs are being finalized, and preliminary component design is being carried out. Beam dynamics studie…
View article: Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ϕ</mml:mi></mml:math>-meson production in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Cu</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:math> GeV and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">U</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">U</mml:mi></mml:mrow></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>193</mml:mn></mml:mrow></mml:math> GeV
Measurement of -meson production in collisions at GeV and collisions at GeV Open
The PHENIX experiment reports systematic measurements at the Relativistic Heavy Ion Collider of φ-meson production in asymmetric Cu + Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV and in U + U collisions at $\\sqrt{s_{NN}}$ = 193 GeV. Measur…
meson production in and collisions at Open
View article: Measurement of $ϕ$-meson production in Cu$+$Au at $\sqrt{s_{_{NN}}}=200$ GeV and U$+$U at $\sqrt{s_{_{NN}}}=193$ GeV
Measurement of $ϕ$-meson production in Cu$+$Au at $\sqrt{s_{_{NN}}}=200$ GeV and U$+$U at $\sqrt{s_{_{NN}}}=193$ GeV Open
The PHENIX experiment reports systematic measurements at the Relativistic Heavy Ion Collider of $ϕ$-meson production in asymmetric Cu$+$Au collisions at $\sqrt{s_{_{NN}}}$=200 GeV and in U$+$U collisions at $\sqrt{s_{_{NN}}}$=193 GeV. Meas…
View article: Gold-gold luminosity increase in RHIC for a beam energy scan with colliding beam energies extending below the nominal injection energy
Gold-gold luminosity increase in RHIC for a beam energy scan with colliding beam energies extending below the nominal injection energy Open
The Beam Energy Scan phase II (BES-II), performed in the Relativistic Heavy Ion Collider (RHIC) from 2019 to 2021, explored the phase transition between quark-gluon plasma and hadronic gas. BES-II exceeded the goal of a fourfold increase i…
View article: Kinematic dependence of azimuthal anisotropies in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi><mml:mo>,</mml:mo></mml:mrow></mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>d</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi><mml:mo>,</mml:mo></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>3</mml:mn></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mspace width="4pt"/><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Kinematic dependence of azimuthal anisotropies in and at Open
There is strong evidence for the formation of small droplets of quark-gluon plasma in p/d/He3+Au collisions at the Relativistic Heavy Ion Collider (RHIC) and in p+p/Pb collisions at the Large Hadron Collider. In particular, the analysis of…
View article: Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized $p{+}p$ collisions at $\sqrt{s}=200$ GeV
Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized $p{+}p$ collisions at $\sqrt{s}=200$ GeV Open
In 2015, the PHENIX collaboration has measured single-spin asymmetries for charged pions in transversely polarized proton-proton collisions at the center of mass energy of $\sqrt{s}=200$ GeV. The pions were detected at central rapidities o…
View article: Systematic study of nuclear effects in $p$$+$Al, $p$$+$Au, $d$$+$Au, and\n $^{3}$He$+$Au collisions at $\\sqrt{s_{_{NN}}}=200$ GeV using $\\pi^0$\n production
Systematic study of nuclear effects in $p$$+$Al, $p$$+$Au, $d$$+$Au, and\n $^{3}$He$+$Au collisions at $\\sqrt{s_{_{NN}}}=200$ GeV using $\\pi^0$\n production Open
The PHENIX collaboration presents a systematic study of $\\pi^0$ production\nfrom $p$$+$$p$, $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au collisions at\n$\\sqrt{s_{_{NN}}}=200$ GeV. Measurements were performed with different\ncentrality…
View article: Transverse single spin asymmetries of forward neutrons in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV as a function of transverse and longitudinal momenta
Transverse single spin asymmetries of forward neutrons in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV as a function of transverse and longitudinal momenta Open
In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded $p$$+$$p$, $p$$+$Al, and $p$$+$Au collision data at center of mass energies of $\sqrt{s_{_{NN}}}=200$ GeV with the proton beam(s) transversely polarized. At v…
View article: Electron lenses in RHIC: status and prospects
Electron lenses in RHIC: status and prospects Open
Two electron lenses are installed in Relativistic Heavy Ion Collider (RHIC). They were used as operational head-on beam-beam compensators in proton-proton collisions, with Gaussian transverse electron beam profiles. One of the lenses was a…
View article: Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>
Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized collisions at Open
In 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 pub…
View article: Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^\uparrow+p$ collisions at $\sqrt{s}=200$ GeV
Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^\uparrow+p$ collisions at $\sqrt{s}=200$ GeV Open
Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in $p^\uparrow+p$ collisions at …
View article: The Interaction Region of the Electron-Ion Collider EIC
The Interaction Region of the Electron-Ion Collider EIC Open
This paper presents an overview of the Interaction Region (IR) design for the planned Electron-Ion Collider (EIC) at Brookhaven National Laboratory. The IR is designed to meet the requirements of the nuclear physics community *. The IR des…
View article: Large Radial Shifts in the EIC Hadron Storage Ring
Large Radial Shifts in the EIC Hadron Storage Ring Open
The Electron Ion Collider will collide hadrons in the Hadron Storage Ring (HSR) with ultra-relativistic electrons in the Electron Storage Ring. The HSR design trajectory includes a large radial shift over a large fraction of its circumfere…
View article: Design Status Update of the Electron-Ion Collider
Design Status Update of the Electron-Ion Collider Open
The design of the electron-ion collider EIC to be constructed at Brookhaven National Laboratory has been continuously evolving towards a realistic and robust design that meets all the requirements set forth by the nuclear physics community…
View article: Conceptual Design Overview of the Electron Ion Collider Instrumentation
Conceptual Design Overview of the Electron Ion Collider Instrumentation Open
A new high-luminosity Electron Ion Collider (EIC) is being developed at Brookhaven National Laboratory (BNL). The conceptual design [1] has recently been completed. The EIC will be realized in the existing RHIC facility. In addition to imp…
View article: Electron-Ion Luminosity Maximization in the EIC
Electron-Ion Luminosity Maximization in the EIC Open
The electron-ion luminosity in EIC has a number of limits, including the ion intensity available from the injectors, the total ion beam current, the electron bunch intensity, the total electron current, the synchrotron radiation power, the…
View article: RHIC Beam Energy Scan Operation with Electron Cooling in 2020
RHIC Beam Energy Scan Operation with Electron Cooling in 2020 Open
RHIC provided Au-Au collisions at beam energies of 5.75 and 4.59 GeV/nucleon for the physics program in 2020 as a part of the Beam Energy Scan II experiment. The operational experience at these energies will be reported with emphasis on th…
View article: RHIC Delayed Abort Experiments
RHIC Delayed Abort Experiments Open
For RHIC to operate at its top energy (100 GeV/n) while protecting the future sPHENIX detector, spontaneous and asynchronous firing of abort kicker modules (pre-fires) have to be avoided. A new triggering circuit for the abort kickers was …
View article: Operational Electron Cooling in the Relativistic Heavy Ion Collider
Operational Electron Cooling in the Relativistic Heavy Ion Collider Open
Since the invention of the electron cooling technique its application to cool hadron beams in colliders was considered for numerous accelerator physics projects worldwide. However, achieving the required high-brightness electron beams of r…
View article: Review of the Fixed Target Operation at RHIC in 2020
Review of the Fixed Target Operation at RHIC in 2020 Open
As part of the Beam Energy Scan (BES) physics program, RHIC operated in Fixed Target mode at various beam energies in 2020. The fixed target experiment, achieved by scraping the beam halo of the circulating beam on a gold ring inserted in …
View article: Production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> mesons in U+U collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>192</mml:mn></mml:mrow></mml:math> GeV
Production of and mesons in U+U collisions at GeV Open
The PHENIX experiment at the Relativistic Heavy Ion Collider measured $\\pi^0$\nand $\\eta$ mesons at midrapidity in U$+$U collisions at $\\sqrt{s_{_{NN}}}=192$\nGeV in a wide transverse momentum range. Measurements were performed in the\n…
View article: Erratum: Evolution of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> Suppression in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Au</mml:mi><mml:mo stretchy="false">+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> Collisions from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>39</mml:mn></mml:math> to 200 GeV [Phys. Rev. Lett. <b>109</b>, 152301 (2012)]
Erratum: Evolution of Suppression in Collisions from to 200 GeV [Phys. Rev. Lett. <b>109</b>, 152301 (2012)] Open
This corrects the article DOI: 10.1103/PhysRevLett.109.152301.