HEPData Search

We present STAR measurements of the azimuthal anisotropy parameter $v_2$ and the binary-collision scaled centrality ratio $R_{CP}$ for kaons and lambdas ($\Lambda+\bar{\Lambda}$) at mid-rapidity in Au+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. In combination, the $v_2$ and $R_{CP}$ particle-type dependencies contradict expectations from partonic energy loss followed by standard fragmentation in vacuum. We establish $p_T \approx 5$ GeV/c as the value where the centrality dependent baryon enhancement ends. The $K_S^0$ and $\Lambda+\bar{\Lambda}$ $v_2$ values are consistent with expectations of constituent-quark-number scaling from models of hadron fromation by parton coalescence or recombination.

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Measurement of analyzing powers of pi + and pi - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam

Allgower, C.E. ; Krueger, K.W. ; Kasprzyk, T.E. ; et al.

Phys.Rev.D 65 (2002) 092008, 2002.

Inspire Record 587580 DOI 10.17182/hepdata.22221

The analyzing powers of π+ and π− were measured using an incident 22−GeV/c transversely polarized proton beam at the Brookhaven Alternating Gradient Synchrotron. A magnetic spectrometer measured π± inclusive asymmetries on a hydrogen and a carbon target. An elastic polarimeter with a CH2 target measured pp elastic-scattering asymmetries to determine the beam polarization using published data for the pp elastic analyzing power. Using the beam polarization determined from the elastic polarimeter and asymmetries from the inclusive spectrometer, analyzing powers AN for π± were determined in the xF and pT ranges (0.45–0.8) and (0.3–1.2 GeV/c), respectively. The analyzing power results are similar in both sign and character to other measurements at 200 and 11.7 GeV/c, confirming the expectation that high-energy pion inclusive analyzing powers remain large and relatively energy independent. This suggests that pion inclusive polarimetry may be a suitable method for measuring future beam polarizations at BNL RHIC or DESY HERA. Analyzing powers of π+ and π− produced on hydrogen and carbon targets are the same. Various models to explain inclusive analyzing powers are also discussed.

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Table 1

Analyzing power measurements for PI+ and PI- production on the carbon target at incident momentum 21.6 GeV. See text of article for definitions of method 'A' and 'B'.

Table 2

Analyzing power measurements for inclusive PI- production from the hydrogen target.

Table 3

Analyzing power measurements for inclusive PI+ production from the hydrogen target.

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Measurements of production and inelastic cross sections for $\mbox{p}+\mbox{C}$, $\mbox{p}+\mbox{Be}$, and $\mbox{p}+\mbox{Al}$ at 60 GeV/$c$ and $\mbox{p}+\mbox{C}$ and $\mbox{p}+\mbox{Be}$ at 120 GeV/$c$

The NA61/SHINE collaboration Aduszkiewicz, A. ; Andronov, E.V. ; Antićić, T. ; et al.

Phys.Rev.D 100 (2019) 112001, 2019.

Inspire Record 1753094 DOI 10.17182/hepdata.95181

This paper presents measurements of production cross sections and inelastic cross sections for the following reactions: 60 GeV/$c$ protons with C, Be, Al targets and 120 GeV/$c$ protons with C and Be targets. The analysis was performed using the NA61/SHINE spectrometer at the CERN SPS. First measurements were obtained using protons at 120 GeV/$c$, while the results for protons at 60 GeV/$c$ were compared with previously published measurements. These interaction cross section measurements are critical inputs for neutrino flux prediction in current and future accelerator-based long-baseline neutrino experiments.

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Production Cross Section

Results of production cross section measurements on proton beams. Measured channeles are p+C/Be/Al at 60 GeV and p+C/Be at 120 GeV.

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Study on Correlations in $\pi^-$ C-12 Interactions at $P$ ($\pi^-$) = 40-{GeV}/$c$ in Cumulative Region

INVESTIGATION OF pi- C-12 INTERACTIONS AT P (pi-) = 40-GeV/c ACCOMPANIED BY CUMULATIVE pi MESON EMISSION

The Study of Effective Mass Spectra of $\pi p$ Pairs in $\pi^-$ C-12 Interactions at $P$ ($\pi^-$) = 40-{GeV}/$c$

Invariant Inclusive Production Cross-sections of Cumulative $\pi^-$ Mesons in $\pi^- ^{12}$C Interactions at 40-{GeV}/$c$ as a Function of Their Cumulative Number and Transverse Momentum. Cumulative Jet Production Cross-sections

Isobar Production Inclusive Cross-sections in $\pi^-$ C-12 Interactions at $P$ ($\pi^-$) = 40-{GeV}/$c$

ANALYSIS OF RAPIDITY DISTRIBUTION OF pi MESONS IN pi- p AND pi- C-12 REACTIONS BY MEANS OF THE FOURIER ALGORITHM

PROPERTIES OF pi- C-12 INTERACTIONS VERSUS THE CUMULATIVE NUMBER OF pi MESONS EMITTED INTO THE BACKWARD HEMISPHERE OF THE LABORATORY SYSTEM

Particle dependence of azimuthal anisotropy and nuclear modification of particle production at moderate p(T) in Au + Au collisions at s(NN)**(1/2) = 200-GeV.

Measurement of analyzing powers of pi + and pi - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam

Measurements of production and inelastic cross sections for $\mbox{p}+\mbox{C}$, $\mbox{p}+\mbox{Be}$, and $\mbox{p}+\mbox{Al}$ at 60 GeV/$c$ and $\mbox{p}+\mbox{C}$ and $\mbox{p}+\mbox{Be}$ at 120 GeV/$c$