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Articles 1 - 24 of 24
Full-Text Articles in Physics
Production Of B¯B At Forward Rapidity In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Production Of B¯B At Forward Rapidity In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
The cross section of bottom quark-antiquark (b¯b) production in p+p collisions at √s=510 GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider. The results are based on the yield of high mass, like-sign muon pairs measured within the PHENIX muon arm acceptance (1.2<|y|<2.2). The b¯b signal is extracted from like-sign dimuons by utilizing the unique properties of neutral B meson oscillation. We report a differential cross section of dσb¯b→μ±μ±/dy=0.16±0.01 (stat)±0.02 (syst)±0.02 (global) nb for like-sign muons in the rapidity and pT ranges 1.2<|y|<2.2 and pT>1 GeV/c, and dimuon mass of 5–10 GeV/c2. The extrapolated total cross section at this energy for b¯b production is 13.1±0.6 (stat)±1.5 (syst)±2.7 (global) μb. The total cross section is compared to a perturbative quantum chromodynamics calculation and is consistent within uncertainties. The azimuthal opening angle between muon pairs from b¯b decays and …
Polarization And Cross Section Of Midrapidity J/Ψ Production In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Polarization And Cross Section Of Midrapidity J/Ψ Production In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
The PHENIX experiment has measured the spin alignment for inclusive J/ψ→e+e− decays in proton-proton collisions at √s=510 GeV at midrapidity. The angular distributions have been measured in three different polarization frames, and the three decay angular coefficients have been extracted in a full two-dimensional analysis. Previously, PHENIX saw large longitudinal net polarization at forward rapidity at the same collision energy. This analysis at midrapidity, complementary to the previous PHENIX results, sees no sizable polarization in the measured transverse momentum range of 0.0
Measurement Of J/Ψ At Forward And Backward Rapidity In P+P, P+Al, P+Au, And 3he+Au Collisions At √Snn=200 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Measurement Of J/Ψ At Forward And Backward Rapidity In P+P, P+Al, P+Au, And 3he+Au Collisions At √Snn=200 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
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 nuclear matter effects, which are also present in large collision systems. With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of charmonium in small systems have become increasingly relevant. We present the results of J/ψ measurements at forward and backward rapidity in various small collision systems, p+p, p+Al, p+Au, and 3He+Au, at √sNN=200 GeV. The results are presented in the form …
Nuclear-Modification Factor Of Charged Hadrons At Forward And Backward Rapidity In P + Al And P + Au Collisions At √Snn=200gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Nuclear-Modification Factor Of Charged Hadrons At Forward And Backward Rapidity In P + Al And P + Au Collisions At √Snn=200gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
The PHENIX experiment has studied nuclear effects in p+Al and p+Au collisions at √sNN=200GeV on charged hadron production at forward rapidity (1.4<η<2.4, p-going direction) and backward rapidity (−2.2<η<−1.2, A-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various collision multiplicity selections. In central p+Al and p+Au collisions, a suppression (enhancement) is observed at forward (backward) rapidity compared to the binary scaled yields in p+p collisions. The magnitude of enhancement at backward rapidity is larger in p+Au collisions than in p+Al collisions, which have a smaller number of participating nucleons. However, the results at forward rapidity show a similar suppression within uncertainties. The results in the integrated centrality are compared with calculations using nuclear parton distribution functions, which show a reasonable agreement at the forward rapidity but fail to describe the backward rapidity enhancement.
J/Ψ And Ψ(2s) Production At Forward Rapidity In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
J/Ψ And Ψ(2s) Production At Forward Rapidity In P+P Collisions At √S=510 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the differential cross section, mean transverse momentum, mean transverse momentum squared of inclusive J/ψ, and cross section ratio of ψ(2S) to J/ψ at forward rapidity in p+p collisions at √s=510 GeV via the dimuon decay channel. Comparison is made to inclusive J/ψ cross sections measured at √s=200 GeV and 2.76–13 TeV. The result is also compared to leading-order nonrelativistic QCD calculations coupled to a color-glass-condensate description of the low-x gluons in the proton at low transverse momentum (pT) and to next-to-leading order nonrelativistic QCD calculations for the rest of …
Measurement Of Two-Particle Correlations With Respect To Second- And Third-Order Event Planes In Au + Au Collisions At √Snn = 200 Gev, Donald Isenhower, Rusty Towell
Measurement Of Two-Particle Correlations With Respect To Second- And Third-Order Event Planes In Au + Au Collisions At √Snn = 200 Gev, Donald Isenhower, Rusty Towell
Engineering and Physics
We present measurements of azimuthal correlations of charged hadron pairs in √sNN=200 GeV Au+Au collisions for the trigger and associated particle transverse-momentum ranges of 14GeV/c) correlations is suppressed compared with that of correlations measured in p+p collisions. At the lowest associated particle pT(0.5
Nonperturbative-Transverse-Momentum Broadening In Dihadron Angular Correlations In √Snn = 200 Gev Proton-Nucleus Collisions, Mike Daugherity, Donald Isenhower, Rusty Towell
Nonperturbative-Transverse-Momentum Broadening In Dihadron Angular Correlations In √Snn = 200 Gev Proton-Nucleus Collisions, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
The PHENIX collaboration has measured high-pT dihadron correlations in p+p, p+Al, and p+Au collisions at √sNN=200 GeV. The correlations arise from inter- and intrajet correlations and thus have sensitivity to nonperturbative effects in both the initial and final states. The distributions of pout, the transverse-momentum component of the associated hadron perpendicular to the trigger hadron, are sensitive to initial- and final-state transverse momenta. These distributions are measured multidifferentially as a function of xE, the longitudinal momentum fraction of the associated hadron with respect to the trigger hadron. The near-side pout widths, sensitive to fragmentation transverse momentum, show no significant broadening …
Measurements Of Μμ Pairs From Open Heavy Flavor And Drell-Yan In P + P Collisions At Ffiffi S P = 200 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Measurements Of Μμ Pairs From Open Heavy Flavor And Drell-Yan In P + P Collisions At Ffiffi S P = 200 Gev, Mike Daugherity, Donald Isenhower, Rusty Towell
Engineering and Physics
PHENIX reports differential cross sections of μμ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in p+p collisions at √s=200 GeV at forward and backward rapidity (1.2<|η|<2.2). The μμ pairs from c¯c, b¯b, and Drell-Yan are separated using a template fit to unlike- and like-sign muon pair spectra in mass and pT. The azimuthal opening angle correlation between the muons from c¯c and b¯b decays and the pair-pT distributions are compared to distributions generated using pythia and powheg models, which both include next-to-leading order processes. The measured distributions for pairs from c¯c are consistent with pythia calculations. The c¯c data present narrower azimuthal correlations and softer pT distributions compared to distributions generated from powheg. The b¯b data are well described by both models. The extrapolated total cross section for bottom production is 3.75±0.24(stat)±0.350.50(syst)±0.45(global) [μb], which is consistent with previous measurements at the Relativistic Heavy Ion Collider in the same system at the same collision energy and is approximately a factor of 2 higher than the central value calculated with theoretical models. The measured Drell-Yan cross section is in good agreement with next-to-leading-order quantum-chromodynamics calculations.
Improved Measurement Of The Longitudinal Spin Transfer To Λ And Bar(Λ) Hyperons In Polarized Proton-Proton Collisions At Sqrt(S) = 200 Gev, James Drachenberg
Improved Measurement Of The Longitudinal Spin Transfer To Λ And Bar(Λ) Hyperons In Polarized Proton-Proton Collisions At Sqrt(S) = 200 Gev, James Drachenberg
Engineering and Physics
No abstract provided.
Longitudinal Double-Spin Asymmetries For Π0s In The Forward Direction For 510 Gev Polarized Pp Collisions, James Drachenberg
Longitudinal Double-Spin Asymmetries For Π0s In The Forward Direction For 510 Gev Polarized Pp Collisions, James Drachenberg
Engineering and Physics
No abstract provided.
Longitudinal Double-Spin Asymmetries For Dijet Production At Intermediate Pseudorapidity In Polarized Pp Collisions At Sqrt(S) = 200 Gev, James Drachenberg
Longitudinal Double-Spin Asymmetries For Dijet Production At Intermediate Pseudorapidity In Polarized Pp Collisions At Sqrt(S) = 200 Gev, James Drachenberg
Engineering and Physics
No abstract provided.
Dango (Doings And Goings On) - Vol. 22 | Issue 11, Haley Stien, Cecily Towell, Aric Tate, Matthew Kimball, Rusty Towell, Vicente Rojas, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity
Dango (Doings And Goings On) - Vol. 22 | Issue 11, Haley Stien, Cecily Towell, Aric Tate, Matthew Kimball, Rusty Towell, Vicente Rojas, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
ACU Department of Engineering and Physics Summer Research Newsletter
Dango (Doings And Goings On) - Vol. 22 | Issue 10, Rusty Towell, Cecily Towell, Haley Stien, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 10, Rusty Towell, Cecily Towell, Haley Stien, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
ACU department of Engineering and Physics Weekly Summer Research Newsletter
Dango (Doings And Goings On) - Vol. 22 | Issue 9, Rusty Towell, Matthew Kimball, Haley Stien, Cecily Towell, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 9, Rusty Towell, Matthew Kimball, Haley Stien, Cecily Towell, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
ACU Department of Engineering and Physics Weekly Summer Research Newsletter
Dango (Doings And Goings On) - Vol. 22 | Issue 8, Matthew Kimball, Cecily Towell, Haley Stien, Rusty Towell, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity
Dango (Doings And Goings On) - Vol. 22 | Issue 8, Matthew Kimball, Cecily Towell, Haley Stien, Rusty Towell, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Weekly Summer Research Newsletter
Dango (Doings And Goings On) - Vol. 22 | Issue 7, Matthew Kimball, Haley Stien, Aric Tate, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Paul Carstens, Joshua Daniel Martinez, Mike Daugherity, Reuben Byrd, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 7, Matthew Kimball, Haley Stien, Aric Tate, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Paul Carstens, Joshua Daniel Martinez, Mike Daugherity, Reuben Byrd, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Summer Research Newsletter for ACU's Engineering and Physics Department
Dango (Doings And Goings On) - Vol. 22 | Issue 6, Hannah Hamilton, Matthew Kimball, Aric Tate, Haley Stien, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 6, Hannah Hamilton, Matthew Kimball, Aric Tate, Haley Stien, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Weekly newsletter from ACU Physics and Engineering
Dango (Doings And Goings On) - Vol. 22 | Issue 5, Cecily Towell, Haley Stien, Matthew Kimball, Rusty Towell, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Shon Watson, Donald Isenhower, Mike Daugherity
Dango (Doings And Goings On) - Vol. 22 | Issue 5, Cecily Towell, Haley Stien, Matthew Kimball, Rusty Towell, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Shon Watson, Donald Isenhower, Mike Daugherity
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Weekly Summer Newsletter for Engineering and Physics
Dango (Doings And Goings On) - Vol. 22 | Issue 4, Cecily Towell, Matthew Kimball, Haley Stien, Aric Tate, Rusty Towell, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 4, Cecily Towell, Matthew Kimball, Haley Stien, Aric Tate, Rusty Towell, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Summer Research Newsletter for ACU's Engineering and Physics Department
Dango (Doings And Goings On)- Vol. 22 | Issue 3, Haley Stien, Cecily Towell, Rusty Towell, Matthew Kimball, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Reuben Byrd, Joshua Daniel Martinez, Mike Daugherity, Paul Carstens, Donald Isenhower
Dango (Doings And Goings On)- Vol. 22 | Issue 3, Haley Stien, Cecily Towell, Rusty Towell, Matthew Kimball, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Reuben Byrd, Joshua Daniel Martinez, Mike Daugherity, Paul Carstens, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Summer Research Newsletter for ACU's Engineering and Physics Department
Dango (Doings And Goings On)- Vol. 22 | Issue 2, Matthew Kimball, Haley Stien, Cecily Towell, Rusty Towell, Aric Tate, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Shon Watson, Reuben Byrd, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On)- Vol. 22 | Issue 2, Matthew Kimball, Haley Stien, Cecily Towell, Rusty Towell, Aric Tate, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Shon Watson, Reuben Byrd, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Summer Research Newsletter for ACU's Engineering and Physics Department
Dango (Doings And Goings On) - Vol. 22 | Issue 1, Matthew Kimball, Haley Stien, Cecily Towell, Rusty Towell, Aric Tate, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Shon Watson, Paul Carstens, Mike Daugherity, Donald Isenhower
Dango (Doings And Goings On) - Vol. 22 | Issue 1, Matthew Kimball, Haley Stien, Cecily Towell, Rusty Towell, Aric Tate, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Shon Watson, Paul Carstens, Mike Daugherity, Donald Isenhower
DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics
Summer Research Newsletter for ACU's Engineering and Physics Department
E&P Newsletter - April 14, 2016, Department Of Engineering And Physics
E&P Newsletter - April 14, 2016, Department Of Engineering And Physics
E&P Newsletter: Newsletter from the Department of Engineering and Physics
Newsletter from ACU's Department of Engineering and Physics
E&P Newsletter - February 23, 2016, Department Of Engineering And Physics
E&P Newsletter - February 23, 2016, Department Of Engineering And Physics
E&P Newsletter: Newsletter from the Department of Engineering and Physics
Department of Engineering and Physics Newsletter