M. Makek

Particle tracking in kaon electroproduction with cathode-charge sampling in multi-wire proportional chambers

P. Achenbach, C. Ayerbe Gayoso, J. C. Bernauer +18

Wire chambers are routinely operated as tracking detectors in magnetic spectrometers at high-intensity continuous electron beams. Especially in experiments studying reactions with…

nucl-ex2020

Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering off $^{28}$ Si and $^{90}$ Zr

A. Esser, M. Thiel, P. Achenbach +30

We report on a new measurement of the beam-normal single spin asymmetry $A_{n}$ in the elastic scattering of 570 MeV transversely polarized electrons off $^{28}$ Si and $^{…

$I ¨ $ meson production in $d$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV

PHENIX Collaboration, A. Adare, C. Aidala +482

The PHENIX experiment has measured $I ¨ $ meson production in $d$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV using the dimuon and dielectron decay channels. The $I ¨ $ meson is meas…

nucl-ex2010

High-precision determination of the electric and magnetic form factors of the proton

J. C. Bernauer, P. Achenbach, C. Ayerbe Gayoso +22

New precise results of a measurement of the elastic electron-proton scattering cross section performed at the Mainz Microtron MAMI are presented. About 1400 cross sections were mea…

Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p + p$ collisions at $s = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +291

Dihadron and isolated direct photon-hadron angular correlations are measured in $p$ $+$ $p$ collisions at $s = 200$ GeV. The correlations are sensitive to nonperturbative initia…

Nuclear dependence of the transverse single-spin asymmetry in the production of charged hadrons at forward rapidity in polarized $p + p$ , $p +$ Al, and $p +$ Au collisions at $s_{_{N N}} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +300

We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively-charged hadrons in polarized $p^{↑} + p$ , $p^{↑} +$ Al a…

The electric and magnetic form factors of the proton

A1 Collaboration, J. C. Bernauer, M. O. Distler +21

The paper describes a precise measurement of electron scattering off the proton at momentum transfers of $0.003 ≲ Q^{2} ≲ 1$ \ GeV $^{2}$ . The average point-to-point error…

Cross section and longitudinal single-spin asymmetry $A_{L}$ for forward $W^{\pm} \to I^¼^{\pm} I^½$ production in polarized $p$ $+$ $p$ collisions at $s = 510$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +426

We have measured the cross section and single spin asymmetries from forward $W^{\pm} \to I^¼^{\pm} I^½$ production in longitudinally polarized $p$ $+$ $p$ collisions at $\sqrt{s}=…

Beam-energy and system-size dependence of the space-time extent of the pion emission source produced in heavy ion collisions

A. Adare, S. Afanasiev, C. Aidala +619

Two-pion interferometry measurements are used to extract the Gaussian radii $R_{out}$ , $R_{side}$ , and $R_{long}$ , of the pion emission sources produced in Cu $+$ Cu and…

Measurement of elliptic flow of J $/ I ¨ $ in $s_{_{N N}} = 200$ GeV Au $+$ Au collisions at forward rapidity

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +365

We report the first measurement of the azimuthal anisotropy of J $/ I ¨ $ at forward rapidity ( $1.2 < ∣ I^\cdot ∣ < 2.2$ ) in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV at the Relativistic H…

nucl-ex2012

Medium modification of jet fragmentation in Au+Au collisions at sqrt(s_NN)=200 GeV measured in direct photon-hadron correlations

A. Adare, S. Afanasiev, C. Aidala +559

The jet fragmentation function is measured with direct photon-hadron correlations in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. The p_T of the photon is an excellent approxima…

nucl-ex2023

Measurements of second-harmonic Fourier coefficients from azimuthal anisotropies in $p$ $+$ $p$ , $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV

N. J. Abdulameer, U. Acharya, A. Adare +389

Recently, the PHENIX Collaboration has published second- and third-harmonic Fourier coefficients $v_{2}$ and $v_{3}$ for midrapidity ( $∣ I^\cdot ∣ < 0.35$ ) charged hadrons in 0\%--5\% central $…

Transverse single-spin asymmetry of midrapidity $I ¨ ^{0}$ and $I^\cdot$ mesons in $p$ +Au and $p$ +Al collisions at $s_{_{N N}} =$ 200 GeV

N. J. Abdulameer, U. Acharya, C. Aidala +319

Presented are the first measurements of the transverse single-spin asymmetries ( $A_{N}$ ) for neutral pions and eta mesons in $p$ +Au and $p$ +Al collisions at $s_{_{N N}} = 200$ Ge…

Polarization and cross section of midrapidity J/ $I ¨ $ production in proton-proton collisions at $s = 510$ GeV

U. Acharya, A. Adare, C. Aidala +347

The PHENIX experiment has measured the spin alignment for inclusive $J / I ¨ \to e^{+} e^{-}$ decays in $p$ + $p$ collisions at $s = 510$ GeV at midrapidity. The angular dist…

Nuclear-modification factor of charged hadrons at forward and backward rapidity in $p$ $+$ Al and $p$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +300

The PHENIX experiment has studied nuclear effects in $p$ $+$ Al and $p$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV on charged hadron production at forward rapidity ( $1.4 < I^\cdot < 2.4$ ,…

Comparison of the space-time extent of the emission source in $d$ $+$ Au and Au $+$ Au collisions at $s_{N N} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +519

Two-pion interferometry measurements in $d$ $+$ Au and Au $+$ Au collisions at $s_{N N} = 200$ GeV are used to extract and compare the Gaussian source radii R $_{out}$ , R$_{\rm…

Cross section and transverse single-spin asymmetry of muons from open heavy-flavor decays in polarized $p$ + $p$ collisions at $s = 200$ GeV

C. Aidala, N. N. Ajitanand, Y. Akiba +433

The cross section and transverse single-spin asymmetries of $I^¼^{-}$ and $I^¼^{+}$ from open heavy-flavor decays in polarized $p$ + $p$ collisions at $s = 200$ GeV were measured…

nucl-ex2012

J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=39 and 62.4 GeV

A. Adare, C. Aidala, N. N. Ajitanand +361

We present measurements of the J/psi invariant yields in sqrt(s_NN)=39 and 62.4 GeV Au+Au collisions at forward rapidity (1.2<|y|<2.2). Invariant yields are presented as a function…

hep-ex2022

Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized $p + p$ collisions at $s = 200$ GeV

U. A. Acharya, C. Aidala, Y. Akiba +307

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…

Single electron yields from semileptonic charm and bottom hadron decays in Au $+$ Au collisions at $s_{N N} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +429

The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open heavy-flavor production in minimum bias Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV via the y…

nucl-ex2005

Measurement of the asymmetries in 3He(e,e'p)d and 3He(e,e'p)np

P. Achenbach, D. Baumann, R. Boehm +48

The electron-target-asymmetries A_parallel and A_perpendicular with target spin parallel and perpendicular to the momentum transfer q were measured for both the two-- and three-bod…

nucl-ex2022

Study of $I ¨ $ -meson production in $p$ $+$ Al, $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV

U. Acharya, A. Adare, C. Aidala +367

Small nuclear collisions are mainly sensitive to cold-nuclear-matter effects; however, the collective behavior observed in these collisions shows a hint of hot-nuclear-matter effec…

hep-ex2021

Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^{↑} + p$ collisions at $s = 200$ GeV

U. A. Acharya, C. Aidala, Y. Akiba +308

Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidi…

Measurements at forward rapidity of elliptic flow of charged hadrons and open-heavy-flavor muons in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +365

We present the first forward-rapidity measurements of elliptic anisotropy of open-heavy-flavor muons at the BNL Relativistic Heavy Ion Collider. The measurements are based on data…

Charm- and Bottom-Quark Production in Au $+$ Au Collisions at $s_{_{N N}}$ = 200 GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +342

The invariant yield of electrons from open-heavy-flavor decays for $1 < p_{T} < 8$ GeV/ $c$ at midrapidity $∣ y ∣ < 0.35$ in Au $+$ Au collisions at $s_{_{N N}}$ = 200 GeV has been measur…

Transverse energy production and charged-particle multiplicity at midrapidity in various systems from $s_{N N} = 7.7$ to 200 GeV

A. Adare, S. Afanasiev, C. Aidala +702

Measurements of midrapidity charged particle multiplicity distributions, $d N_{ch} / d I^\cdot$ , and midrapidity transverse-energy distributions, $d E_{T} / d I^\cdot$ , are presented for a variety…

Measurement of $J / I ¨ $ at forward and backward rapidity in $p$ + $p$ , $p$ $+ A$ l, $p$ $+ A$ u, and $^{3}$ He+Au collisions at $s_{_{N N}} = 200 GeV$

U. A. Acharya, A. Adare, C. Aidala +358

Charmonium is a valuable probe in heavy-ion collisions to study the properties of the quark gluon plasma, and is also an interesting probe in small collision systems to study cold…

Consistent threshold pi0 electro-production at Q^2=0.05, 0.10, and 0.15 GeV^2/c^2

H. Merkel, P. Achenbach, C. Ayerbe Gayoso +22

New, accurate data are presented on the near threshold p(e,e'p)pi^0 reaction in the range of four-momentum transfers between Q^2=0.05 and 0.15GeV^2/c^2. The data were taken with th…

nucl-ex2021

Measurement of the Generalized Polarizabilities of the Proton at Intermediate $Q^{2}$

H. Fonvieille, J. BeriÄiÄ, L. Correa +35

Background: Generalized polarizabilities (GPs) are important observables to describe the nucleon structure, and measurements of these observables are still scarce. Purpose: This pa…

Centrality dependence of LÃ©vy-stable two-pion Bose-Einstein correlations in $s_{_{N N}} = 200$ GeV Au $+$ Au collisions

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +394

The PHENIX experiment measured the centrality dependence of two-pion Bose-Einstein correlation functions in $s_{_{N N}} = 200$ ~GeV Au $+$ Au collisions at the Relativistic Heavy…

hep-ex2021

Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized $p$ $+$ $p$ collisions at $s = 200$ GeV

U. A. Acharya, C. Aidala, Y. Akiba +311

In 2015, the PHENIX collaboration has measured very forward ( $I^\cdot > 6.8$ ) single-spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus coll…

hep-ex2024

Multiplicity dependent $J / I ¨ $ and $I ¨ (2 S)$ production at forward and backward rapidity in $p$ $+$ $p$ collisions at $s = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +298

The $J / I ¨ $ and $I ¨ (2 S)$ charmonium states, composed of $c c ˉ$ quark pairs and known since the 1970s, are widely believed to serve as ideal probes to test quantum chromodynamics…

Scaling properties of fractional momentum loss of high-pT hadrons in nucleus-nucleus collisions at $s_{_{N N}}$ from 62.4 GeV to 2.76 TeV

A. Adare, S. Afanasiev, C. Aidala +627

Measurements of the fractional momentum loss ( $S_{loss} \equiv I^´ p_{T} / p_{T}$ ) of high-transverse-momentum-identified hadrons in heavy ion collisions are presented. Using $I ¨ ^{0}$ in A…

nucl-ex2006

Lowest Q^2 Measurement of the gamma*p -> Delta Reaction: Probing the Pionic Contribution

S. Stave, M. O. Distler, I. Nakagawa +29

To determine nonspherical angular momentum amplitudes in hadrons at long ranges (low Q^2), data were taken for the p(\vec{e},e'p)Ï^0 reaction in the Delta region at Q^2=0.060 (GeV…

Measurement of jet-medium interactions via direct photon-hadron correlations in Au $+$ Au and $d$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV

U. Acharya, A. Adare, S. Afanasiev +574

We present direct photon-hadron correlations in 200 GeV/A Au $+$ Au, $d$ $+$ Au and $p$ $+$ $p$ collisions, for direct photon $p_{T}$ from 5--12 GeV/ $c$ , collected by the PHENIX Collaborat…

Low-mass vector-meson production at forward rapidity in $p$ $+$ $p$ and Au $+$ Au collisions at $s_{_{N N}} = 200$ ~GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +352

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured low-mass vector-meson ( $I ¨ + I ¨ $ and $I ¨ $ ) production through the dimuon decay channel at forward rapidity $…

hep-ex2015

Inclusive cross section and double-helicity asymmetry for $I ¨ ^{0}$ production at midrapidity in $p$ $+$ $p$ collisions at $s = 510$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +410

PHENIX measurements are presented for the cross section and double-helicity asymmetry ( $A_{LL}$ ) in inclusive $I ¨ ^{0}$ production at midrapidity from $p$ $+$ $p$ collisions at $\sqrt{s…

nucl-ex2012

sPHENIX: An Upgrade Concept from the PHENIX Collaboration

A. Adare, C. Aidala, N. N. Ajitanand +423

The PHENIX collaboration presents a concept for a major upgrade to the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). This upgrade, referred to as sPHENIX, brings e…

Angular decay coefficients of $J / I ¨ $ mesons at forward rapidity from $p + p$ collisions at $s = 510$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +387

We report the first measurement of the full angular distribution for inclusive $J / I ¨ \to I^¼^{+} I^¼^{-}$ decays in $p$ $+$ $p$ collisions at $s = 510$ GeV. The measurements…

Systematic study of charged-pion and kaon femtoscopy in Au $+$ Au collisions at $s_{_{N N}}$ =200 GeV

A. Adare, S. Afanasiev, C. Aidala +496

We present a systematic study of charged pion and kaon interferometry in Au $+$ Au collisions at $s_{_{N N}}$ =200 GeV. The kaon mean source radii are found to be larger than pi…

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

N. J. Abdulameer, U. Acharya, C. Aidala +321

Polarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized pro…

Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized $p$ + $p$ , $p$ +Al, and $p$ +Au collisions at $s_{N N} = 200$ GeV}

N. J. Abdulameer, U. Acharya, C. Aidala +319

Reported here are transverse single-spin asymmetries ( $A_{N}$ ) in the production of charged hadrons as a function of transverse momentum ( $p_{T}$ ) and Feynman- $x$ ( $x_{F}$ ) in polarize…

Measurements of directed, elliptic, and triangular flow in Cu $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +401

Measurements of anisotropic flow Fourier coefficients ( $v_{n}$ ) for inclusive charged particles and identified hadrons $I ¨ ^{\pm}$ , $K^{\pm}$ , $p$ , and $p ˉ$ produced at midrapidi…

Centrality dependence of low-momentum direct-photon production in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +477

The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV down to $p_{T} = 0.4$ GeV/ $c$ . Pho…

Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at $s = 510$ GeV in $p + p$ Collisions

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +358

We present measurements of the cross section and double-helicity asymmetry $A_{LL}$ of direct-photon production in $p + p$ collisions at $s = 510$ GeV. The measureme…

Pseudorapidity dependence of particle production and elliptic flow in asymmetric nuclear collisions of $p$ $+$ Al, $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +364

Asymmetric nuclear collisions of $p$ $+$ Al, $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au at $s_{_{N N}} = 200$ GeV provide an excellent laboratory for understanding particle production…

Measurements of $B \to J / I ¨ $ at forward rapidity in $p$ $+$ $p$ collisions at $s = 510$ GeV

C. Aidala, N. N. Ajitanand, Y. Akiba +427

We report the first measurement of the fraction of $J / I ¨ $ mesons coming from $B$ -meson decay ( $F_{B \to J / I ¨ }$ ) in $p$ + $p$ collisions at $s =$ 510 GeV. The measuremen…

nucl-ex2004

Measurement of the Electric Form Factor of the Neutron at Q^2 = 0.3-0.8 (GeV/c)^2

D. I. Glazier, M. Seimetz, J. R. M. Annand +41

The electric form factor of the neutron, G_En, has been measured at the Mainz Microtron by recoil polarimetry in the quasielastic D(e_pol,e'n_pol)p reaction. Three data points have…

hep-ex2025

Transverse single-spin asymmetry of forward $I^\cdot$ mesons in $p^{↑} + p$ collisions at $s = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +380

Utilizing the 2012 transversely polarized proton data from the Relativistic Heavy Ion Collider at Brookhaven National Laboratory, the forward $I^\cdot$ -meson transverse single-spin asym…

Measurements of multiparticle correlations in $d$ $+$ Au collisions at 200, 62.4, 39, and 19.6 GeV and $p$ $+$ Au collisions at 200 GeV and implications for collective behavior

C. Aidala, Y. Akiba, M. Alfred +314

Recently, multiparticle-correlation measurements of relativistic $p / d /^{3}$ He $+$ Au, $p$ $+$ Pb, and even $p$ $+$ $p$ collisions have shown surprising collective signatures. Here we prese…

nucl-ex2008

A new measurement of the structure functions $P_{LL} - P_{T T} / e p s i l o n$ and $P_{L T}$ in virtual Compton scattering at $Q^{2} =$ 0.33 (GeV/c) $^{2}$

A1 Collaboration, P. Janssens, L. Doria +36

The cross section of the $e p \to e^{'} p^{'} I^^{3}$ reaction has been measured at $Q^{2} = 0.33$ (GeV/c) $^{2}$ . The experiment was performed using the electron beam of the MAMI accelerator and…

Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized $p$ $+$ $p$ collisions at $s = 510$ GeV

U. A. Acharya, A. Adare, C. Aidala +357

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the longitudinal double spin asymmetries, $A_{LL}$ , for charged pions at midrapidity ( $∣ I^\cdot ∣ < 0.35$ ) in long…

nucl-ex2019

Multi-particle azimuthal correlations for extracting event-by-event elliptic and triangular flow in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +319

We present measurements of elliptic and triangular azimuthal anisotropy of charged particles detected at forward rapidity $1 < ∣ I^\cdot ∣ < 3$ in Au $+$ Au collisions at $s_{_{N N}} = 200$ …

Measurement of $I ¨ $ -meson production at forward rapidity in $p$ $+$ $p$ collisions at $s$ =510 GeV and energy dependence of $I ¨ _{I ¨} $ from $s$ =200 GeV to 7 TeV

A. Adare, C. Aidala, N. N. Ajitanand +355

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the differential cross section of $I ¨ $ (1020)-meson production at forward rapidity in $p$ $+$ $p$ collisions…

Dielectron production in Au $+$ Au collisions at $s_{N N}$ =200 GeV

A. Adare, C. Aidala, N. N. Ajitanand +444

We present measurements of $e^{+} e^{-}$ production at midrapidity in Au $+$ Au collisions at $s_{_{N N}}$ = 200 GeV. The invariant yield is studied within the PHENIX detector accep…

nucl-ex2026

Elliptic flow of $π^{0}$ mesons in Cu $+$ Au collisions at $s_{_{N N}} = 200$ GeV and U $+$ U at $s_{_{N N}} = 193$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +386

The second-order azimuthal anisotropy coefficients ( $v_{2}$ ) of neutral $π$ mesons ( $π^{0}$ ) have been measured as a function of the transverse momentum ( $p_{T}$ ) and centrality of Cu $+$ …

nucl-ex2017

Measurement of long-range angular correlations and azimuthal anisotropies in high-multiplicity $p$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +270

We present the first measurements of long-range angular correlations and the transverse momentum dependence of elliptic flow $v_{2}$ in high-multiplicity $p$ $+$ Au collisions at $\sqr…

Measurement of emission angle anisotropy via long-range angular correlations with high $p_{T}$ hadrons in $d$ $+$ Au and $p$ $+$ $p$ collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +470

We present measurements of two-particle angular correlations between high-transverse-momentum ( $2 < p_{T} < 11$ GeV/ $c$ ) $I ¨ ^{0}$ observed at midrapidity ( $∣ I^\cdot ∣ < 0.35$ ) and particles produc…

Reply to Comment on "High-Precision Determination of the Electric and Magnetic Form Factors of the Proton"

J. C. Bernauer, P. Achenbach, C. Ayerbe Gayoso +22

In arXiv:1108.3058v1 [nucl-ex], Arrington criticizes the Coulomb corrections we applied in the analysis of high precision form factor data (see Phys.Rev.Lett.105:242001, 2010, arXi…

nucl-ex2013

Measurements of the Î³* p --> Î(1232) reaction at low Q2

N. Sparveris, S. Stave, P. Achenbach +29

We report new p $(e, e^{'} p) I ¨ ^{\circ}$ measurements in the $I^^{+} (1232)$ resonance at the low momentum transfer region utilizing the magnetic spectrometers of the A1 Collab…

nucl-ex2023

Low- $p_{T}$ direct-photon production in Au $+$ Au collisions at $s_{_{N N}} = 39$ and 62.4 GeV

N. J. Abdulameer, U. Acharya, A. Adare +431

The measurement of direct photons from Au $+$ Au collisions at $s_{_{N N}} = 39$ and 62.4 GeV in the transverse-momentum range $0.4 < p_{T} < 3$ Gev/ $c$ is presented by the PHENIX coll…

hep-ex2022

Kinematic dependence of azimuthal anisotropies in $p$ $+$ Au, $d$ $+$ Au, $^{3}$ He+Au at $s_{_{N N}}$ = 200 GeV

U. A. Acharya, A. Adare, C. Aidala +378

There is strong evidence for the formation of small droplets of quark-gluon plasma in $p / d /^{3}$ He+Au collisions at the Relativistic Heavy Ion Collider (RHIC) and in $p$ + $p$ /Pb col…

Exclusive electroproduction of K+ Lambda and K+ Sigma^0 final states at Q^2 = 0.030-0.055 (GeV/c)^2

P. Achenbach, C. Ayerbe Gayoso, J. C. Bernauer +32

Cross section measurements of the exclusive p(e,e'K+)Lambda,Sigma^0 electroproduction reactions have been performed at the Mainz Microtron MAMI in the A1 spectrometer facility usin…

nucl-ex2006

Determination of quadrupole strengths in the gamma*p-->Delta(1232) transition at Q2= 0.20 (GeV/c)2

N. F. Sparveris, P. Achenbach, C. Ayerbe Gayoso +29

We report new precise p $(e, e^{'} p) I ¨ ^{0}$ measurements at the peak of the $I^^{+} (1232)$ resonance at $Q^2=\unit[0.20](GeV/c)^2$ performed at the Mainz Microtron (MAMI). Th…

hep-ex2025

Cross sections of $I^\cdot$ mesons in $p$ $+$ $p$ collisions at forward rapidity at $s = 500$ GeV and central rapidity at $s = 510$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +497

We present the first measurements of the forward and midrapidity $I^\cdot$ -meson cross sections from $p$ $+$ $p$ collisions at $s = 500$ and $510$ ~GeV, respectively. We also report t…

nucl-ex2020

Evolution of pi^0 suppression in Au+Au collisions from sqrt(s_NN) = 39 to 200 GeV

A. Adare, S. Afanasiev, C. Aidala +367

Neutral-pion, pi^0, spectra were measured at midrapidity (|y|<0.35) in Au+Au collisions at sqrt(s_NN) = 39 and 62.4 GeV and compared to earlier measurements at 200 GeV in the 1<p_T…

nucl-ex2017

Measurements of $e^{+} e^{-}$ pairs from open heavy flavor in $p$ + $p$ and $d$ + $A$ collisions at $s_{N N} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +505

We report a measurement of $e^{+} e^{-}$ pairs from semileptonic heavy-flavor decays in $p$ + $p$ collisions at $s_{N N} = 200$ ~GeV. The $e^{+} e^{-}$ pair yield from $b b ˉ$ and $c\bar…

Production of $b b ˉ$ at forward rapidity in $p$ + $p$ collisions at $s = 510$ GeV

U. Acharya, A. Adare, C. Aidala +347

The cross section of bottom quark-antiquark ( $b b ˉ$ ) production in $p$ + $p$ collisions at $s = 510$ GeV is measured with the PHENIX detector at the Relativistic Heavy Ion C…

nucl-ex2017

Measurement of the relative yields of $I ¨ (2 S)$ to $I ¨ (1 S)$ mesons produced at forward and backward rapidity in $p$ $+$ $p$ , $p$ $+$ Al, $p$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +358

The PHENIX Collaboration has measured the ratio of the yields of $I ¨ (2 S)$ to $I ¨ (1 S)$ mesons produced in $p$ $+$ $p$ , $p$ $+$ Al, $p$ $+$ Au, and $^{3}$ He $+$ Au collisions at $\sqrt{s_{_{…

$I ¨ $ meson production in the forward/backward rapidity region in Cu $+$ Au collisions at $s_{N N} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +509

The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured $I ¨ $ meson production and its nuclear modification in asymmetric Cu $+$ Au heavy-ion collisions at $\…

nucl-ex2023

Measurement of $I ¨ $ -meson production in Cu $+$ Au at $s_{_{N N}} = 200$ GeV and U $+$ U at $s_{_{N N}} = 193$ GeV

N. J. Abdulameer, U. Acharya, C. Aidala +408

The PHENIX experiment reports systematic measurements at the Relativistic Heavy Ion Collider of $I ¨ $ -meson production in asymmetric Cu $+$ Au collisions at $s_{_{N N}}$ =200 GeV…

Azimuthal anisotropy of direct photons in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +322

The PHENIX experiment at the Relativistic Heavy Ion Collider measured the second Fourier component $v_{2}$ of the direct-photon azimuthal anisotropy at midrapidity in Au $+$ Au collisi…

Nonperturbative transverse momentum broadening in dihadron angular correlations in $s_{N N} = 200$ GeV proton-nucleus collisions

C. Aidala, Y. Akiba, M. Alfred +296

The PHENIX collaboration has measured high- $p_{T}$ dihadron correlations in $p$ $+$ $p$ , $p$ $+$ Al, and $p$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV. The correlations arise from in…

Measurements of mass-dependent azimuthal anisotropy in central $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +349

We present measurements of the transverse-momentum dependence of elliptic flow $v_{2}$ for identified pions and (anti)protons at midrapidity ( $∣ I^\cdot ∣ < 0.35$ ), in 0%--5% central $p$ $+$ Au…

Disentangling centrality bias and final-state effects in the production of high- $p_{T}$ $I ¨ ^{0}$ using direct $I^^{3}$ in $d$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV

N. J. Abdulameer, U. Acharya, C. Aidala +275

PHENIX presents a simultaneous measurement of the production of direct $I^^{3}$ and $I ¨ ^{0}$ in $d$ $+$ Au collisions at $s_{_{N N}} = 200$ GeV over a $p_{T}$ range of 7.5 to 18 GeV/ $c$ …

Heavy-quark production and elliptic flow in Au $+$ Au collisions at $s_{_{N N}} = 62.4$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +366

We present measurements of electrons and positrons from the semileptonic decays of heavy-flavor hadrons at midrapidity ( $∣ y ∣ <$ 0.35) in Au $+$ Au collisions at $\sqrt{s_{_{NN}}}=62.4…

An Upgrade Proposal from the PHENIX Collaboration

A. Adare, S. Afanasiev, C. Aidala +473

In this document the PHENIX collaboration proposes a major upgrade to the PHENIX detector at the Relativistic Heavy Ion Collider. This upgrade, sPHENIX, enables an extremely rich j…

Nuclear dependence of the transverse-single-spin asymmetry for forward neutron production in polarized $p$ $+$ $A$ collisions at $s_{_{N N}} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +312

During 2015 the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of t…

Single-spin asymmetry of $J / I ¨ $ production in $p$ $+$ $p$ , $p$ $+$ Al, and $p$ $+$ Au collisions with transversely polarized proton beams at $s_{_{N N}} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +289

We report the transverse single-spin asymmetries of $J / I ¨ $ production at forward and backward rapidity, $1.2 < ∣ y ∣ < 2.2$ , as a function of $J / I ¨ $ transverse momentum ( $p_{T}$ ) and Feynm…

nucl-ex2022

Systematic study of nuclear effects in $p$ $+$ Al, $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV using $I ¨ ^{0}$ production

U. A. Acharya, A. Adare, C. Aidala +550

The PHENIX collaboration presents a systematic study of $I ¨ ^{0}$ production from $p$ $+$ $p$ , $p$ $+$ Al, $p$ $+$ Au, $d$ $+$ Au, and $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV.…

Production of $I ¨ ^{0}$ and $I^\cdot$ mesons in U $+$ U collisions at $s_{_{N N}} = 192$ GeV

U. Acharya, C. Aidala, N. N. Ajitanand +399

The PHENIX experiment at the Relativistic Heavy Ion Collider measured $I ¨ ^{0}$ and $I^\cdot$ mesons at midrapidity in U $+$ U collisions at $s_{_{N N}} = 192$ GeV in a wide transverse m…

Creating small circular, elliptical, and triangular droplets of quark-gluon plasma

C. Aidala, Y. Akiba, M. Alfred +316

The experimental study of the collisions of heavy nuclei at relativistic energies has established the properties of the quark-gluon plasma (QGP), a state of hot, dense nuclear matt…

Azimuthally anisotropic emission of low-momentum direct photons in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +549

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured 2nd and 3rd order Fourier coefficients of the azimuthal distributions of direct photons emitted at midrapi…

physics.ins-det2011

Design, Construction, Operation and Performance of a Hadron Blind Detector for the PHENIX Experiment

W. Anderson, B. Azmoun, A. Cherlin +24

A Hadron Blind Detector (HBD) has been developed, constructed and successfully operated within the PHENIX detector at RHIC. The HBD is a Cherenkov detector operated with pure CF4.…

Identified charged-hadron production in $p$ $+$ Al, $^{3}$ He $+$ Au, and Cu $+$ Au collisions at $s_{_{N N}} = 200$ GeV and in U $+$ U collisions at $s_{_{N N}} = 193$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +477

The PHENIX experiment has performed a systematic study of identified charged-hadron ( $I ¨ ^{\pm}$ , $K^{\pm}$ , $p$ , $p ˉ$ ) production at midrapidity in $p$ $+$ Al, $^{3}$ He $+$ Au, Cu $+$ Au…

nucl-ex2013

Measurement of the neutron electric to magnetic form factor ratio at Q2 = 1.58 GeV2 using the reaction 3He(e,e'n)pp

B. S. Schlimme, P. Achenbach, C. A. Ayerbe Gayoso +29

A measurement of beam helicity asymmetries in the reaction 3He(e,e'n)pp has been performed at the Mainz Microtron in quasielastic kinematics in order to determine the electric to m…

Measurements of elliptic and triangular flow in high-multiplicity $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +627

We present the first measurement of elliptic ( $v_{2}$ ) and triangular ( $v_{3}$ ) flow in high-multiplicity $^{3}$ He $+$ Au collisions at $s_{_{N N}} = 200$ GeV. Two-particle correlati…

Measurement of charm and bottom production from semileptonic hadron decays in $p$ $+$ $p$ collisions at $s_{N N} = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +299

Measurements of the differential production of electrons from open-heavy-flavor hadrons with charm- and bottom-quark content in $p$ $+$ $p$ collisions at $s = 200$ GeV are prese…

Nonprompt direct-photon production in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

U. A. Acharya, A. Adare, C. Aidala +332

The measurement of the direct-photon spectrum from Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV is presented by the PHENIX collaboration using the external-photon-conversion te…

hep-ex2025

Measurement of inclusive jet cross section and substructure in $p$ $+$ $p$ collisions at $s_{_{N N}} = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +443

The jet cross-section and jet-substructure observables in $p$ $+$ $p$ collisions at $s = 200$ GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collide…

Production of $I ¨ ^{0}$ and $I^\cdot$ mesons in Cu $+$ Au collisions at $s_{_{N N}}$ =200 GeV

C. Aidala, N. N. Ajitanand, Y. Akiba +401

Production of $I ¨ ^{0}$ and $I^\cdot$ mesons has been measured at midrapidity in Cu $+$ Au collisions at $s_{_{N N}}$ =200 GeV. Measurements were performed in $I ¨ ^{0} (I^\cdot) \to I^^{3} I^^{3}$ …

Jet modification via $I ¨ ^{0}$ -hadron correlations in Au $+$ Au collisions at $s_{_{N N}} = 200$ GeV

PHENIX Collaboration, N. J. Abdulameer, U. Acharya +532

High-momentum two-particle correlations are a useful tool for studying jet-quenching effects in the quark-gluon plasma. Angular correlations between neutral-pion triggers and charg…

Measurements of $I^¼ I^¼$ pairs from open heavy flavor and Drell-Yan in $p + p$ collisions at $s = 200$ GeV

C. Aidala, Y. Akiba, M. Alfred +290

PHENIX reports differential cross sections of $I^¼ I^¼$ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in $p$ $+$ $p$ collisions at $\sqrt{s…

Centrality-dependent modification of jet-production rates in deuteron-gold collisions at $s_{N N}$ =200 GeV

A. Adare, C. Aidala, N. N. Ajitanand +481

Jet production rates are measured in $p$ $+$ $p$ and $d$ $+$ Au collisions at $s_{N N}$ =200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider.…

Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions

A. Adare, S. Afanasiev, C. Aidala +669

The PHENIX collaboration presents first measurements of low-momentum ( $0.4 < p_{T} < 3$ GeV/ $c$ ) direct-photon yields from Au $+$ Au collisions at $s_{_{N N}}$ =39 and 62.4 GeV. For b…

physics.ins-det2011

A Large-Scale FPGA-Based Trigger and Dead-Time Free DAQ System for the Kaos Spectrometer at MAMI

P. Achenbach, C. Ayerbe Gayoso, J. C. Bernauer +24

The Kaos spectrometer is maintained by the A1 collaboration at the Mainz Microtron MAMI with a focus on the study of (e,e'K^+) coincidence reactions. For its electron-arm two verti…

Measurement of the Beam-Recoil Polarization in Low-Energy Virtual Compton Scattering from the Proton

L. Doria, P. Janssens, P. Achenbach +38

Double-polarization observables in the reaction $e p \to e^{'} p^{'} I^^{3}$ have been measured at $Q^{2} = 0.33 (G e V / c)^{2}$ . The experiment was performed at the spectrometer set…

Concept for an Electron Ion Collider (EIC) detector built around the BaBar solenoid

PHENIX Collaboration, A. Adare, C. Aidala +304

The PHENIX collaboration presents here a concept for a detector at a future Electron Ion Collider (EIC). The EIC detector proposed here, referred to as ePHENIX, will have excellent…

physics.ins-det2024

Kaonic lead feasibility measurement at DAÎ¦NE to solve the charged kaon mass discrepancy

D. Bosnar, L. Abbene, C. Amsler +39

An HPGe detector equipped with a transistor reset preamplifier and readout with a CAEN DT5781 fast pulse digitizer was employed in the measurement of X-rays from kaonic lead at the…