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High $p_T K^\pm / \pi^\pm$ Production in $p p$ Collisions at the {ISR}: Strangeness Suppression and Gluon Effects

The Ames-Bologna-CERN-Dortmund-Heidelberg-Warsaw collaboration Breakstone, A. ; Buchanan, C.D. ; Campanini, R. ; et al.
Phys.Lett.B 135 (1984) 510-514, 1984.
Inspire Record 193431 DOI 10.17182/hepdata.30589

The ratios of high p T charged kaon to pion production cross sections at √ s = 45 and 62 GeV are presented. The values of the K ± π ± ratios are essentially independent of both √ s and x T = 2p T √s and are compatible with a strangeness suppression factor λ = 0.55. By contrast, the K − π − values fall with x T suggesting a gluonic origin of K − . QCD calculations agrees with the measurements.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inclusive $\rho^0$ Production in $p p$ Collisions at the {CERN} {ISR}

The British-French-Scandinavian collaboration Albrow, M.G. ; Almehed, S. ; Booth, P.S.L. ; et al.
Nucl.Phys.B 155 (1979) 39-51, 1979.
Inspire Record 133360 DOI 10.17182/hepdata.34664

The inclusive production of ϱ 0 mesons in pp collisions has been measured at five c.m. energies from √ s = 23.6 to 63.0 GeV. The cross sections and the production spectra as a function of transverse momentum and rapidity are discussed.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Charged Particle Correlations at $Y=0$ in $p p$ Collisions at the CERN ISR

Banner, M. ; Cheze, J.B. ; Kasha, H. ; et al.
Nucl.Phys.B 126 (1977) 61-86, 1977.
Inspire Record 5196 DOI 10.17182/hepdata.35283

Measurements of the double differential cross sections for ππ and pπ production in pp collisions at the CERN ISR are presented for 5 c.m. energies s = 22, 30, 44, 53, 62 GeV . Charge and transverse momentum correlations are also reported.

20 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A Measurement of Direct Photon Production at Large P(T) at the {CERN} {ISR}

Diakonou, M. ; Kourkoumelis, C. ; Resvanis, L.K. ; et al.
Phys.Lett.B 91 (1980) 296-300, 1980.
Inspire Record 152520 DOI 10.17182/hepdata.27234

We have measured direct photon production in pp collisions at the CERN intersecting storage rings for c.m. energies 31 < √ s < 63 GeV and transverse momenta up to 9GeV/ c , using segmented lead/liquid-argon calorimeters. The ratio of direct photon to π 0 production is significantly larger than zero, starting at p T ≈ 4 GeV/ c and increasing to values of about 0.4 at 9GeV/ c . No significant √s dependence is seen.

1 data table
Table 1

No description provided.


Characteristics of J/$\psi$ and $\Upsilon$ production at the {CERN} intersecting storage rings

Kourkoumelis, C. ; Resvanis, L. ; Filippas, T.A. ; et al.
Phys.Lett.B 91 (1980) 481-486, 1980.
Inspire Record 152744 DOI 10.17182/hepdata.27235

We present the B( d θ d y ) y=0 for J /ψ over thefull range of ISR energies and for ϒ at √ s = 53 and 63 GeV, using their dielectron decay mode. The average transverse momentum and the decay angles are presented. We found ( p T ) = 1.75 ± 0.19 GeV for ϒ, being higher than ( p T ) of the continuum and rising with √s. We present a comparison of the cross sections of J/ψ and ϒ with those of the continuum, at the same masses, as a function of √s. An appropriate scaling of the hadronic production of quark-antiquark narrow bound states involving ⋉, J/ψ, ψ′, ϒ, and ϒ′ is presented as a function of m /√ s at y = 0, and is compared with Drell-Yan scaling.

2 data tables
Table 1

No description provided.

Table 2

UPSILON HERE = UPSILON+UPSILON PRIME.


Inclusive $\pi^0$ Production at Very Large $p_T$ at the {ISR}

Kourkoumelis, C. ; Resvanis, L.K. ; Filippas, T.A. ; et al.
Phys.Lett.B 84 (1979) 271-276, 1979.
Inspire Record 141135 DOI 10.17182/hepdata.27343

Inclusive π 0 production at 90° has been studied at the ISR at s 1 2 = 52.7 and 62.4 GeV over the p T range from 7 to 15 GeV/ c . The two photons from π 0 decay yielded overlapping electromagnetic showers in the liquid-argon-Pb plate calorimeter detector system. Any direct photon production is included in these measurements. For large values of p T , the cross section is observed to decrease with p T more slowly than the p T −8 behaviour which has been observed at lower values of p T .

1 data table
Table 1

No description provided.


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

Kourkoumelis, C. ; Resvanis, L.K. ; Filippas, T.A. ; et al.
Phys.Lett.B 84 (1979) 277-280, 1979.
Inspire Record 141136 DOI 10.17182/hepdata.27350

The inclusive η production cross section at the CERN ISR has been measured for p T values of up to 11 GeV/ c . We find that the η π 0 cross-section ratio has an average value of 0.55 ± 0.07 and varies little with p T .

1 data table
Table 1

No description provided.


Direct Production of High $p_T$ Single Photons at the {CERN} Intersecting Storage Rings

The Athens-Athens-Brookhaven-CERN collaboration Diakonou, M. ; Kourkoumelis, C. ; Resvanis, L.K. ; et al.
Phys.Lett.B 87 (1979) 292-296, 1979.
Inspire Record 143254 DOI 10.17182/hepdata.27293

Single photon production in pp collisions at 30 < √ s < 62 GeV has been measured with liquid-argon-lead calorimeters at the CERN ISR. This process remains approximately constant with increasing √ s . For fixed √ s , the single photon to π 0 ratio increases strongly with increase in p T . The γ π 0 ratio is about 0.2 for p T above 4.5 GeV/c.

1 data table
Table 1

No description provided.


Study of Resolved High {P(T)} Neutral Pions at the {CERN} {ISR}

Kourkoumelis, C. ; Resvanis, L.K. ; Voulgaris, G. ; et al.
Phys.Lett.B 83 (1979) 257-260, 1979.
Inspire Record 140588 DOI 10.17182/hepdata.27353

The inclusive production of π 0 at large values of p T in pp collisions at the ISR has been studied. In this experiment the two photons are resolved and separately measured for p T values of up to 6 GeV/ c , giving confidence that the desired signal has been separated from various backgrounds.

1 data table
Table 1

No description provided.


Inclusive $\Delta^{++}$ and $\Lambda$ Production in Proton Proton Interactions at {ISR} Energies

Drijard, D. ; Fabbri, F. ; Fischer, H.G. ; et al.
Z.Phys.C 21 (1984) 321, 1984.
Inspire Record 188801 DOI 10.17182/hepdata.16280

Inclusive cross sections forΔ++ production inpp interactions at different ISR energies are presented. The differential cross sectiondσ/dx forΔ++ production is found to be approximately independent of Feynmanx. No strong energy dependence is seen over the ISR energy range. The topological cross sections ofΔ++ at\(\sqrt s= 62\) GeV show an appreciable contribution from non-diffractive production mechanisms. An upper limit for theΔ0 production cross section is determined.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.