Adam, J.
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Hadron and Hadron Pair Production at Large Transverse Momentum in $p \bar{p}$ and $p p$ Interactions at the {ISR}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett.B 121 (1983) 439-444, 1983.
Inspire Record 182425 DOI 10.17182/hepdata.30813

We have measured the production of one and two large transverse momentum hadrons in p p and pp interactions in the range 2 < p T < 6 GeV/ c for the central rapidity region |y| < 0.9 at s = 63 and 31 GeV . No statistically significant difference between p p and pp collisions is observed. The results are in accordance with lowest order QCS perturbative calculations and rule out a large contribution of Constituent Interchange Model (CIM), di-quark of quark-fusion subprocesses in this kinematic range.

2 data tables match query
Table 1

No description provided.

Table 2

No description provided.


Direct Evidence for the Emergence of Jets in Events Triggered on Large Transverse Energy in $p p$ Collisions at $\sqrt{s}=63$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett.B 118 (1982) 185-192, 1982.
Inspire Record 179517 DOI 10.17182/hepdata.30854

We present data obtained from a 1.7 sr hadron calorimeter, triggered on transverse energy, in pp collisions at s =63 GeV at the CERN-ISR. From the change in the distribution of energy in the calorimeter, we extract the cross section for two-constituent hard scattering for p T between 6 and 14 GeV at y = 0. The decrease of this jet cross section over this p T range is consistent with exp (− bp T ), with b = (1.02 ± 0.09) GeV −1 . The slope and normalization of the cross section agree well with a QCD motivated Monte Carlo model. The ratio between jet and single particle cross sections [ dσ JET / dp T )/( dσ π 0 / dp T )]| y = 0 changes from about 200 at 6 GeV to about 1500 at 14 GeV.

2 data tables match query
Table 1

No description provided.

Table 2

No description provided.


Large Transverse Momentum Particle Production in $\alpha \alpha$ and $p p$ Collisions at the {CERN} {ISR}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Nucl.Phys.B 209 (1982) 309-320, 1982.
Inspire Record 178882 DOI 10.17182/hepdata.34016

The production of charged hadrons with high p T in αα collisions at √ s =126 GeV and pp collisions at √ s =31 and 63 GeV is compared, and the structure of the events associated with the high- p T particles is studied. The probability of finding associated particles close to the trigger particle increases strongly between √ s =31 and 63 GeV for pp collisions. For p T >2.5GeV/ c the αα/pp cross section ratio at the same energy per nucleon is measured to be 18.7 ± 2.0, to be compared with A 2 = 16, and a higher associated multiplicity is observed for αα.

1 data table match query
Table 1

FIRST PP DATA IS AT SQRT(S)=31 AND THE SECOND PP DATA IS AT 63 GEV.


Multiplicity Distributions in $p \alpha$ and $\alpha \alpha$ Collisions in the {CERN} {ISR}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett.B 119 (1982) 464, 1982.
Inspire Record 179518 DOI 10.17182/hepdata.6665

Measurements of charged particle multiplicity distributions in the central rapidity region in p-p and p-α, and α-α collisions are reported. They are better fitted to the “wounded nucleon” than to the “gluon string” model. The average transverse momenta, for all three reactions, are identical (and almost independent of multiplicity) up to very high multiplicities.

2 data tables match query
Table 1

THE FIRST PP DATA IS AT 44 GEV, THE SECOND AT 63 GEV.

Table 2

No description provided.


rivet Analysis
Measurement of $Z / \gamma^\ast +jet+X$ angular distributions in $p \bar{p}$ collisions at $\sqrt{s}=1.96$ TeV

The D0 collaboration Abazov, Victor Mukhamedovich ; Abbott, Braden Keim ; Abolins, Maris A. ; et al.
Phys.Lett.B 682 (2010) 370-380, 2010.
Inspire Record 826756 DOI 10.17182/hepdata.52513

We present the first measurements at a hadron collider of differential cross sections for Z+jet+X production in delta phi(Z, jet), |delta y(Z, jet)| and |y_boost(Z, jet)|. Vector boson production in association with jets is an excellent probe of QCD and constitutes the main background to many small cross section processes, such as associated Higgs production. These measurements are crucial tests of the predictions of perturbative QCD and current event generators, which have varied success in describing the data. Using these measurements as inputs in tuning event generators will increase the experimental sensitivity to rare signals.

12 data tables match query
Table 1

Differential cross section in bins of PHI(P=3)-PHI(P=4) for Z/GAMMA* transverse momentum > 25 GeV.

Table 2

Differential cross section in bins of PHI(P=3)-PHI(P=4) for Z/GAMMA* transverse momentum > 45 GeV.

Table 3

Differential cross section in bins of ABS(YRAP(P=3)-YRAP(P=4)) for Z/GAMMA* transverse momentum > 25 GeV.

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Neutron-Proton and Neutron-Deuteron Total Cross Sections from 14 to 27 GeV/c

Kriesler, Michael N. ; Jones, Lawrence W. ; Longo, Michael J. ; et al.
Phys.Rev.Lett. 20 (1968) 468-471, 1968.
Inspire Record 54461 DOI 10.17182/hepdata.21734

The first direct measurements of neutron-proton and neutron-deuteron total cross sections in the momentum range 14 to 27 GeV/c are presented. The np total cross section apparently becomes less than the pp total cross section in this momentum region. Our results show no evidence for a rapid vanishing of the Glauber screening correction as predicted by Abers et al. on the basis of Regge theory.

1 data table match query
Table 1

'1'. '2'.


Polarization of Xi- and Omega- hyperons produced from neutral beams

Woods, D.M. ; Border, P.M. ; Ciampa, D.P. ; et al.
Phys.Rev.D 54 (1996) 6610-6619, 1996.
Inspire Record 424017 DOI 10.17182/hepdata.22323

We have studied the polarization of Ξ− and Ω− hyperons produced by high energy neutral particle beams. An unpolarized neutral beam striking a target at ±1.8 mrad produced 1.4×107Ξ−'s with an average momentum of 395 GeV/c which were unpolarized, within a sensitivity limit of 0.007, and 2.2 × 105 Ω−'s with a polarization of +0.042±0.007 at an average momentum of 374 GeV/c. A polarized neutral beam striking a target at 0.0 mrad produced 7.1×105Ξ−'s which had a polarization of -0.118±0.004 at an average momentum of 393 GeV/c and 1.8 × 104 Ω−'s with a polarization of -0.069±0.023 at an average momentum of 394 GeV/c. The polarized neutral beam measurement is in good agreement with a previous measurement. The unpolarized neutral beam results are not understood in the context of the current models of hyperon polarization.

8 data tables match query
Table 1

Unpolarized neutral beam.

Table 2

Unpolarized neutral beam.

Table 3

Polarized neutral beam.

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rivet Analysis
Test of spin dependence in charm-quark fragmentation to D*.

The TPC/Two-Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Rev.D 43 (1991) 29-33, 1991.
Inspire Record 316132 DOI 10.17182/hepdata.22830

We have measured the polarization of D*, the energy dependence of the polarization, and the spin-density matrix of D* in e+e− annihilation at a center-of-mass energy of 29 GeV using the Time Projection Chamber detector at the SLAC storage ring PEP. In 147 pb−1 of data we see no strong evidence for polarization, alignment, or final-state interactions in this fragmentation process.

2 data tables match query
Table 1

Polarization is the factor alpha(z) in the expression d width (D*-->D pi)/domega = C(1+alpha(z)cos(theta)**2).

Table 2

Spin density matrices for D* --> D0 pi+.


The Relative Production of $\pi^+$, $K^+$, $p$ and $\overline{p}$ at Large Transverse Momentum in 200-{GeV} and 300-{GeV} $\pi^- -p$ Collisions

Frisch, Henry J. ; Giokaris, N.D. ; Green, J.M. ; et al.
Phys.Rev.Lett. 44 (1980) 511, 1980.
Inspire Record 8853 DOI 10.17182/hepdata.23865

This Letter reports measurements of the ratios of $\pi$, K, and p production at large values of transverse momentum in $\pi^- −p$ collisions. The charge ratios, such as $\frac {\pi^−} {\pi^+}$, $\frac {K^−} {K^+}$, and $\frac {\overline{p}}{p}$ are seen to be quite different from those measured in p −p collisions. These ratios are sensitive tests of hard-scattering models, and are compared with theoretical predictions. The particle ratios have also been studied as a function of center-of-mass angle ($\theta^*$) at $\theta^*$ = 90°, 77°, and 60°.

28 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Exclusive Inelastic Final States in p anti-p Interactions at 49-GeV/c

Zissa, D.E. ; Barnes, V.E. ; Carmony, D.D. ; et al.
Phys.Rev.D 22 (1980) 2642, 1980.
Inspire Record 12972 DOI 10.17182/hepdata.24162

We have measured the total and subchannel cross sections for the reaction p¯p→p¯pπ+π− at 49 GeV/c. This reaction is dominated by two production mechanisms, diffraction and meson exchange. In addition, we have measured the total cross section for p¯p→p¯p2π+2π− and compared it to values at other momenta and with the corresponding pp interaction. Within the present statistics, no significant amount of exclusive annihilation is found into two, four, and six charged pions.

1 data table match query
Table 1

No description provided.