Date

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Inclusive particle production in 400-GeV/c p p interactions

Aguilar-Benitez, M. ; Allison, W.W.W. ; Batalov, A.A. ; et al.
Z.Phys. C50 (1991) 405-426, 1991.
Inspire Record 314091 DOI 10.17182/hepdata.1435
61 data tables

No description provided.

No description provided.

No description provided.

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Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in $\vec{p}+\vec{p}$ collisions at $\sqrt{s}=200$ GeV

The PHENIX collaboration Adare, A. ; Aidala, C. ; Ajitanand, N.N. ; et al.
Phys.Rev. D90 (2014) 012007, 2014.
Inspire Record 1282448 DOI 10.17182/hepdata.64716

Results are presented from data recorded in 2009 by the PHENIX experiment at the Relativistic Heavy Ion Collider for the double-longitudinal spin asymmetry, $A_{LL}$, for $\pi^0$ and $\eta$ production in $\sqrt{s} = 200$ GeV polarized $p$$+$$p$ collisions. Comparison of the $\pi^0$ results with different theory expectations based on fits of other published data showed a preference for small positive values of gluon polarization, $\Delta G$, in the proton in the probed Bjorken $x$ range. The effect of adding the new 2009 \pz data to a recent global analysis of polarized scattering data is also shown, resulting in a best fit value $\Delta G^{[0.05,0.2]}_{\mbox{DSSV}} = 0.06^{+0.11}_{-0.15}$ in the range $0.05<x<0.2$, with the uncertainty at $\Delta \chi^2 = 9$ when considering only statistical experimental uncertainties. Shifting the PHENIX data points by their systematic uncertainty leads to a variation of the best-fit value of $\Delta G^{[0.05,0.2]}_{\mbox{DSSV}}$ between $0.02$ and $0.12$, demonstrating the need for full treatment of the experimental systematic uncertainties in future global analyses.

9 data tables

PI0 ASYM(LL) measurements from 2005.

PI0 ASYM(LL) measurements from 2006.

PI0 ASYM(LL) measurements from 2009.

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Cross section and transverse single-spin asymmetry of $\eta$ mesons in $p^{\uparrow}+p$ collisions at $\sqrt{s}=200$ GeV at forward rapidity

The PHENIX collaboration Adare, A. ; Aidala, C. ; Ajitanand, N.N. ; et al.
Phys.Rev. D90 (2014) 072008, 2014.
Inspire Record 1300542 DOI 10.17182/hepdata.64267
4 data tables

The measured ETA meson cross section, E*D3(SIG)/DP**3, versus PT at forward rapidity. The statistical and systematic uncertainties are type-A and type-B uncertainties respectively.

ASYM(PEAK) and ASYM(BG) for ETA mesons measured as a function of XF in the range 0.3 < ABS(XF) < 0.7 from the 4X4B triggered dataset. The values represented are the weighted mean of the South and North MPC (Muon Piston Calorimeter). The uncertainties listed are statistical only.

ASYM for ETA mesons measured as a function of XF in the range 0.2 < ABS(XF) < 0.7. Uncertainties listed are those due to the statistics, the XF uncorrelated uncertainties due to extracting the yields, and the correlated relative luminosity uncertainty.

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Measurement of single spin asymmetry in eta meson production in p (polarized) p and anti-p (polarized) p interactions in the beam fragmentation region at 200-GeV/c

The Fermilab E704 collaboration Adams, D.L. ; Bonner, B.E. ; Corcoran, M.D. ; et al.
Nucl.Phys. B510 (1998) 3-11, 1998.
Inspire Record 449811 DOI 10.17182/hepdata.51687
2 data tables

The true asymmetry for ETA production in proton-proton collisions.

The true asymmetry for ETA production in antiproton-proton collisions.


gamma production in p Ne-20 and p N interactions at 300-GeV

Yuldashev, B.S. ; Aliev, Sh.M. ; Alimov, M.A. ; et al.
Phys.Rev. D43 (1991) 2803-2814, 1991.
Inspire Record 299846 DOI 10.17182/hepdata.22850

Data on the multiplicity and inclusive spectra of γ produced in inelastic pNe20 and pN interactions at 300 GeV are presented. The γ multiplicity for pNe20 interactions is 11.43±0.23, and the ratio of 〈nγ〉 for pNe20 and pN interactions is 1.48±0.05. From an analysis of the effective-mass distributions, 〈nπ0〉=4.91±0.52 and 〈nη0〉=1.47±0.33. In fact, η0 production is much higher in pNe20 interactions [R(η0π0)=0.66±0.12 for np≥21] than in pN interactions [R(η0π0)=0.06±0.04]. No η′(958) signal is seen. Strong correlations between 〈nγ〉 and np, the number of secondary protons, are observed, primarily from the central and target fragmentation regions. Inclusive y* and p⊥ spectra are analyzed and evidence for low-energy cascading and rescattering of fast particles in the projectile fragmentation region is discussed. The data are compared to the predictions of the additive quark model, the Lund model, and the dual parton model.

9 data tables

No description provided.

GAMMA-MULTIPLICITY FOR (PROTON-NUCLEON)-INTERACTION WAS OBTAINED AT AVERAGING OVER (PP) AND (PN) EVENTS, AND THEN WAS USED IN THE PRESENTED RATIO.

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High x(t) single spin asymmetry in pi0 and eta production at x(F) = 0 by 200-GeV polarized anti-protons and protons

The E581 E704 collaborations Adams, D.L. ; Akchurin, N. ; Belikov, N.I. ; et al.
Phys.Lett. B276 (1992) 531-535, 1992.
Inspire Record 314231 DOI 10.17182/hepdata.29252
3 data tables

Statistical errors only.

Statistical errors only.

Statistical errors only.


High Transverse Momentum $\eta$ Production in $\pi^- p$, $\pi^+ p$ and $p p$ Interactions at 280-{GeV}/$c$

The WA70 collaboration Bonesini, M. ; Bonvin, E. ; Booth, P.S.L. ; et al.
Z.Phys. C42 (1989) 527, 1989.
Inspire Record 267856 DOI 10.17182/hepdata.15526
3 data tables

No description provided.

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No description provided.


No description provided.

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Inclusive $\eta$ Production at Low Transverse Momentum in 63-{GeV} $p p$ Collisions at the {CERN} Intersecting Storage Rings

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett. B178 (1986) 447, 1986.
Inspire Record 230636 DOI 10.17182/hepdata.30230
1 data table

No description provided.


pi0 AND eta MESONS PRODUCTION IN THE HADRON - NUCLEAR INTERACTIONS AT 10.5-GeV/c

Akimenko, S.A. ; Bannikov, A.V. ; Belousov, V.I. ; et al.
Sov.J.Nucl.Phys. 38 (1983) 732, 1983.
Inspire Record 189187 DOI 10.17182/hepdata.41132
14 data tables

No description provided.

No description provided.

No description provided.

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Evidence for Dominant Vector Meson Production in Inelastic Proton Proton Collisions at 53-GeV Center-of-Mass Energy

Jancso, G. ; Albrow, M.G. ; Almehed, S. ; et al.
Nucl.Phys. B124 (1977) 1-11, 1977.
Inspire Record 119346 DOI 10.17182/hepdata.35433
5 data tables

No description provided.

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INCLUSIVE ETA PRODUCTION IN P P COLLISION AT ISR ENERGIES

Amaldi, E. ; Beneventano, M. ; Borgia, B. ; et al.
Nucl.Phys. B158 (1979) 1-10, 1979.
Inspire Record 145095 DOI 10.17182/hepdata.34663
1 data table

No description provided.


A comparison of direct photon, pi0, and eta production in p anti-p and pp interactions at the CERN ISR

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett. B158 (1985) 282-288, 1985.
Inspire Record 213984 DOI 10.17182/hepdata.30391
5 data tables

No description provided.

No description provided.

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Inclusive $\eta$ Production at High $p_T$ at the {ISR}

Kourkoumelis, C. ; Resvanis, L.K. ; Filippas, T.A. ; et al.
Phys.Lett. B84 (1979) 277-280, 1979.
Inspire Record 141136 DOI 10.17182/hepdata.27350
1 data table

No description provided.


Production of $\pi^0$ and Eta0 at 11-degrees in $p p$ Collisions at $\sqrt{s}=63$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Z.Phys. C18 (1983) 5, 1983.
Inspire Record 188928 DOI 10.17182/hepdata.16326
2 data tables

No description provided.

No description provided.


Inclusive eta Production at Large Transverse Momenta

Donaldson, G.J. ; Gordon, H.A. ; Lai, K.-W. ; et al.
Phys.Rev.Lett. 40 (1978) 684, 1978.
Inspire Record 122477 DOI 10.17182/hepdata.20917
11 data tables

No description provided.

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No description provided.

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