Smith, A.M.
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Search for Direct Single Photon Production at Large p(T) in Proton Proton Collisions at s**(1/2) = 62.4-GeV

The CERN-Columbia-Oxford-Rockefeller & CCOR collaborations Angelis, A.L.S. ; Besch, H.J. ; Blumenfeld, Barry J. ; et al.
Phys.Lett.B 94 (1980) 106-112, 1980.
Inspire Record 153483 DOI 10.17182/hepdata.27178

As part of a study of large p T phenomena in photon-proton collisions at the CERN ISR, a search for direct single photon production has been performed. A statistical division of the data sample into the fraction consistent with single photon and the fraction due to multiphoton decays of neutral hadrons is accomplished by measuring the average conversion probability for the sample in a one radiation length thick converter. The fraction of the sample attributable to direct single photon production is 〈 γ /all〉 = 0.074 ± 0.012 for 6 GeV/ c < p T 10 GeV/ c , and 〈 γ /all〉 = 0.26 ± 0.04 for p T > 10 GeV/ c , with an additional systematic uncertainty of ±0.05 for both values.

1 data table
Table 1

No description provided.


Study of the Reaction $\bar{p} p \to p X$ at 22.4-{GeV}/$c$

The Alma Ata-Dubna-Helsinki-Kosice-Moscow-Prague-Tbilisi collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Dashian, N.B. ; et al.
Sov.J.Nucl.Phys. 33 (1981) 64-66, 1981.
Inspire Record 154173 DOI 10.17182/hepdata.69635

None

49 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the Inclusive Reactions $K^- p \to p$ X at 32-{GeV}/$c$

The French-Soviet & CERN-Soviet collaborations Babintsev, V.V. ; Borovikov, A.A. ; Buschbeck, B. ; et al.
Nucl.Phys.B 183 (1981) 29-52, 1981.
Inspire Record 154721 DOI 10.17182/hepdata.7921

In a K − p experiment at 32 GeV/ c with a sensitivity of 6 ev/≈b the inclusive reaction K − p → p + X was studied in the kinematical region x < −0.3. Most of the protons in this region were identified by ionization. Correcting for losses of the very slow as well as of the fast protons in this region we obtained σ p ( x < −0.3) = 5.9 ± 0.2 mb. The double invariant differential cross sections of protons were analysed in terms of the variables x , p T 2 , and M 2 / s , t , and the contributions from separate peripheral mechanisms were analysed. A triple-Regge analysis was performed on the inclusive proton d 2 σ /d t d( M 2 / s ) distribution with | t | < 1.1 GeV 2 . The fit with an RRP term resulted in an effective trajectory for the exchanged reggeon lying somewhat lower than that for the leading meson trajectory. Inclusion in the fit of an additional ππp term showed that pion exchange is important in the triple-Regge region at small | t |.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Production of Charged Hadrons, $\pi^0$ and Electron Pairs in 70-{GeV}/$c \pi^- p$ Interactions

The Bologna-Glasgow-Rutherford-Saclay-Turin collaboration Barloutaud, R. ; Baruzzi, V. ; Bird, I. ; et al.
Nucl.Phys.B 176 (1980) 285-302, 1980.
Inspire Record 153174 DOI 10.17182/hepdata.34414

Charged multiplicity and π 0 cross sections for π − p inelastic interactions at 70 GeV/ c are presented. The data were obtained from an exposure of the BEBC bubble chamber equipped with a track sensitive target (TST) to an unseparated negative beam at the CERN SPS. About 10 000 events were used for the charged multiplicity study, and about 2000 Dalitz pairs for the π 0 production analysis. A total of 12 e + e − pairs with a mass higher than the π 0 mass were found and analysed in terms of η or ω Dalitz pairs or decay pairs of vector mesons. Comparisons with data at other energies are made in terms of charged prong, π 0 cross sections, and of multiplicity parameters. The moments of longitudinal and transverse momentum distributions of the π 0 are determined and compared to the predictions of quark counting rule models.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the Scaling in the Mean and of the Associative Multiplicity in Inclusive $K^0_S$ and $\Lambda$ Production in $\bar{P} P$ Interactions at 22.4-{GeV}/c.

The Dubna-Alma Ata-Helsinki-Moscow-Prague-Tbilisi collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Gramenitsky, I.M. ; et al.
Sov.J.Nucl.Phys. 33 (1981) 373, 1981.
Inspire Record 154157 DOI 10.17182/hepdata.39558

None

33 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Charged Baryon and Anti-baryon Production in the Fragmentation Region by 240-{GeV} Protons

The Bristol-Geneva-Heidelberg-Orsay-Rutherford-Strasbourg collaboration Bourquin, M. ; Brown, R.M. ; Chatelus, Y. ; et al.
Z.Phys.C 5 (1980) 275, 1980.
Inspire Record 153261 DOI 10.17182/hepdata.15026

Measurements of the production inp-BeO collisions of charged baryons and antibaryons with strangeness between −3 and +3 at\(\sqrt s= 21.2GeV\)x=0.48, andpT=600MeV/c are reported. The experimental results can be interpreted within the framework of a simple proton fragmentation-recombination model.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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$\gamma$ and $\pi^0$ Production in $\bar{p} p$ Interactions at 22.4-{GeV}/$c$

The Dubna-Alma Ata-Helsinki-Moscow-Prague-Tbilisi collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Gramenitsky, I.M. ; et al.
Sov.J.Nucl.Phys. 32 (1980) 684, 1980.
Inspire Record 154051 DOI 10.17182/hepdata.18075

None

17 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Photoproduction of $K^+ K^-$ Pairs on Hydrogen at Photon Energies of 20-{GeV} to 36-{GeV}

The Bonn-CERN-Ecole Poly-Glasgow-Lancaster-Manchester-Orsay-Paris-Rutherford-Sheffield collaboration Aston, D. ; Atkinson, M. ; Bailey, R. ; et al.
Nucl.Phys.B 172 (1980) 1-12, 1980.
Inspire Record 153022 DOI 10.17182/hepdata.34516

The reaction γ p→K + K − p has been investigated with photons in the energy range of 20< E γ <36 GeV and with K + K − pairs in the mass range of M K + K − <2.0 GeV. The production of the φ(1019) contributes with a cross section σ ( γ p → φ p) × BR( φ →K + K − ) = 240±6 nb with an additional systematic error of ±20 nb. In the higher mass range of 1.05< M K + K − <2.0 GeV the production of K + K − pairs yields a cross section σ ( γ p→K + K − p) = 160±8 nb with an additional systematic error of +40 −30 nb.

3 data tables
Table 1

No description provided.

Table 2

K+ K- PRODUCTION ABOVE PHI MASS.

Table 3

No description provided.


Charged Multiplicity Distributions in Anti-n $p$ Interactions at 6-{GeV}/c

The Alma Ata-Dubna-Moscow-Prague-Serpukhov-Sofiya-Tbilisi-Helsinki collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Gramenitsky, I.M. ; et al.
JINR-E1-80-164, 1980.
Inspire Record 153456 DOI 10.17182/hepdata.39557

None

2 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////).


A Study of the Production of High $p$(t) $\pi^0$'s at the {CERN} Intersecting Storage Rings

Kourkoumelis, C. ; Resvanis, L.K. ; Filippas, T.A. ; et al.
Z.Phys.C 5 (1980) 95-104, 1980.
Inspire Record 152946 DOI 10.17182/hepdata.16617

The inclusive cross-section for π0 production near 90° inpp collisions at the CERN Intersecting Storage Rings has been studied for thepT range 3<pT<16GeV/c at four different centre-of-mass energies (\(\sqrt s = 30.6\), 44.8, 52.7, and 62.8 GeV). In this experiment the two photons from the π0→yy decay were resolved and measured separately forpT values up to 10 GeV/c. Results indicate an agreement with thepT−8 behaviour for the lower values ofpT and a slower decrease of the cross-section for the higher values ofpT. The high-pT data deviate from the scaling expressionpT−nF(xT), which holds for the lowerpT values (pT<8GeV/c).

4 data tables
Table 1

USING RETRACTED GEOMETRY.

Table 2

USING SUPER-RETRACTED GEOMETRY.

Table 3

USING SUPER-RETRACTED GEOMETRY.

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