Alpgard, K.
PBAR P --> CHARGED X
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rivet Analysis
Transverse Momentum Distributions of Charged Particles Produced in anti-p p Interactions at s**(1/2) = 630-GeV and 1800-GeV

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 61 (1988) 1819, 1988.
Inspire Record 263320 DOI 10.17182/hepdata.20105

Measurements of inclusive transverse-momentum spectra for charged particles produced in proton-antiproton collisions at √2 of 630 and 1800 GeV are presented and compared with data taken at lower energies.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

Results of fit to invariant cross section of the form AP0**N/(PT + P0)**N.

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Annihilation and Topological Cross-sections for $P P$ and $\bar{P} P$ Interactions at 200-{GeV}/c

The NA5 collaboration Allday, J. ; Fry, J.R. ; Mason, P. ; et al.
Z.Phys.C 40 (1988) 29-39, 1988.
Inspire Record 268872 DOI 10.17182/hepdata.15563

The results of an analysis of streamer chamber data from the NA5 experiment are presented. Topological cross sections forpp and\(\bar p\)p interactions and strange neutral particle production at 200 GeV/c have been measured and (\(\bar p\)p−pp) difference cross sections have been determined. Multiplicity moments were calculated.

1 data table
Table 1

No description provided.


rivet Analysis
UA5: A general study of proton-antiproton physics at s**(1/2) = 546-GeV

The UA5 collaboration Alner, G.J. ; Alpgard, K. ; Anderer, P. ; et al.
Phys.Rept. 154 (1987) 247-383, 1987.
Inspire Record 244829 DOI 10.17182/hepdata.19330

None

3 data tables
Table 1

Mean charged multiplicity for NSD events extrapolated to the full phase space.

Table 2

Charged particle pseudorapidity density for NSD events at pseudorapidiy = 0.

Table 3

Corrected charged particle multiplicity distribution for NSD events.


Diffraction Dissociation at the {CERN} Pulsed Collider at {CM} Energies of 900-{GeV} and 200-{GeV}

The UA5 collaboration Ansorge, R.E. ; Åsman, B. ; Booth, C.N. ; et al.
Z.Phys.C 33 (1986) 175, 1986.
Inspire Record 232615 DOI 10.17182/hepdata.15812

Cross-sections for diffractive particle production and pseudorapidity distributions of the decay products of diffractive states are presented. The data were obtained with the UA 5 streamer chamber detector at the CERNpp Collider operated in a new pulsed mode yieldingpp interactions at c.m. energies of 900 and 200 GeV. Data recorded with a special trigger designed to select a sample of events enriched in single-diffractive interactions clearly favour apt-limited fragmentation of diffractive states. The cross-section for single-diffractive particle production ϊ was found to be 7.8±0.5±1.1 mb at 900 GeV and 4.8±0.5±0.8 mb at 200 GeV (first error statistical, second systematic). From the pseudorapidity distribution of diffractive states we deduce the average number of charged particles to be 6.5±1.0 at 900 GeV and 4.1±1.1 at 200 GeV. Furthermore we report on our estimates for the cross-section of double-diffractive particle production at both Collider energies.

3 data tables
Table 1

Single diffractive cross sections.

Table 2

Average number of single diffractive charged particles.

Table 3

Estimate of the double diffractive cross sections.


An Investigation of Multiplicity Distributions in Different Pseudorapidity Intervals in anti-p p Reactions at a CMS Energy of 540-GeV

The UA5 collaboration Alner, G.J. ; Alpgard, K. ; Anderer, P. ; et al.
Phys.Lett.B 160 (1985) 193-198, 1985.
Inspire Record 213986 DOI 10.17182/hepdata.6545

Multiplicity distributions of charged particles for inelastic, non single-diffractive events in proton-antiproton collisions at a centre of mass energy of 540 GeV are presented for various pseudorapidity (Δη) intervals. The widths of the multiplicity distributions, scaled to their means, increase as Δη is made smaller, and the deviation from a Poisson distribution becomes progressively more pronounced. It is found that the data are remarkably well described by a negative binomial distribution. The parameters of the distributions vary smoothly with the size of the acceptance interval.

31 data tables
Table 1

Data for full phase space.

Table 2

No description provided.

Table 3

No description provided.

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Studies of $\bar{p} p \to \bar{n} n$ and $\bar{n} p$ Annihilation at Incident Momenta of 700-{MeV}/$c$ and 760-{MeV}/$c$

The Bombay-Chandigarh-Jammu-Tokyo collaboration Banerjee, S. ; Ganguli, S.N. ; Gurtu, A. ; et al.
Z.Phys.C 28 (1985) 163, 1985.
Inspire Record 217418 DOI 10.17182/hepdata.1974

Results are presented on the charge exchange reaction\(\bar pp \to \bar nn\) and\(\bar np\) annihilations from bubble chamber exposures to antiproton beam of momenta 700 and 760 MeV/c. The differential cross section of\(\bar pp \to \bar nn\) shows a forward spike followed by a clear dip bump structure. Total annihilation cross section of\(\bar np\) for average\(\bar n\) momentum of 700 MeV/c has been evaluated to be 55.4±2.2 mb. The multiplicity, Feynmanx andpT2 distributions for inclusive charged pions in\(\bar pp\) and\(\bar np\) annihilations are found to be similar. The emission of charged pions from\(\bar np\) annihilations are found to be consistent with thermodynamic models with temperature ∼110 MeV.

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Inclusive Particle Production in the Transverse Momentum Range Between 0.25-{GeV}/$c$ and 40-{GeV}/$c$ at the {CERN} S $p \bar{p}$ S Collider

The UA2 & Bern-CERN-Copenhagen-Orsay-Pavia-Saclay collaborations Banner, M. ; Bloch, Ph. ; Bonaudi, F. ; et al.
Z.Phys.C 27 (1985) 329, 1985.
Inspire Record 206017 DOI 10.17182/hepdata.16075

Inclusive particle production cross-sections have been measured at the\(Sp\bar pS\) collider using the UA2 detector in various ranges of transverse momentum (PT) and pseudo-rapidity (η). Cross-section measurements are presented forπ0 production (PT≦15 GeV/c, |η|≦0.85 andPT≦40 GeV/c, 1.0≦|η|≦1.8), for η meson production (3≦PT≦6 GeV/c, |η|≦0.85) and for charged particle production (PT≦10 GeV/c, 1.0≦|η|≦1.8). Results are compared with the predictions of QCD calculations.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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INCLUSIVE gamma PRODUCTION IN anti-p p INTERACTIONS AT 12-GeV/c

Chakrabarti, S. ; Banerjee, S. ; Ganguli, S.N. ; et al.
Z.Phys.C 27 (1985) 1, 1985.
Inspire Record 202797 DOI 10.17182/hepdata.16116

The inclusive production of photons in\(\bar pp\) interactions has been studied at incident momentum of 12 GeV/c. Topological cross section has been presented and KNO distribution for\(\bar pp\) interactions has been studied. Inclusive cross section for γ production has been measured to be 149.5±8.8 mb. Bulk of these photons come from π0 decays whose cross section has been evaluated independently to be 60.4±7.9 mb. Signals of η and ω have been seen in γγ and π+π-π0 decay modes and their inclusive cross sections have been estimated to be 14.9±8.8 mb and 14.6±7.0 mb respectively. Results on average multiplicities of γ and two particle correlation parameters are presented. Neutral pions seem to be more strongly correlated than the charged pions. The inclusive distributions of the Feynmanx andpT/2 of the photons are compared with expectation from charged pions on the basis of charge independence. Energy dependence of the normalised invariant distributions has been studied. The distribution of the scaling variablez of photons ine+e− and\(\bar pp\) interactions has been compared.

8 data tables
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INCLUSIVE PRODUCTION OF NEUTRAL STRANGE PARTICLES IN ANTI-P P INTERACTIONS AT 70-GeV/c

Lemonne, J. ; Vanhomwegen, G. ; Wickens, J. ; et al.
Z.Phys.C 24 (1984) 103-110, 1984.
Inspire Record 207327 DOI 10.17182/hepdata.16319

The inclusive production ofKs0, Λ and\(\bar \Lambda \) particles is investigated in 70 GeV/c\(\bar pp\) interactions in an experiment performed at CERN using BEBC equipped with a TST. Differential cross-sections are studied and compared with corresponding data at surrounding energies. Differences withpp data obtained at the same energy allow an estimate of theKs0, production cross-section in annihilation processes. Evidence is also given for central\(\Lambda \bar \Lambda \) production.

1 data table
Table 1

No description provided.


Scaling Violation Favoring High Multiplicity Events at 540-GeV CMS Energy

The UA5 collaboration Alner, G.J. ; Alpgard, K. ; Ansorge, R.E. ; et al.
Phys.Lett.B 138 (1984) 304-310, 1984.
Inspire Record 199419 DOI 10.17182/hepdata.30571

New data are presented on the charged multiplicity distribution for non single-diffractive events produced in pp̄ interactions at a CM energy s = 540 GeV . The distribution in the full pseudorapidity range is compared with data from the ISR. Using the scaling variable z = n 〈n〉 a change of shape is observed. The effect is manifested as an increase from 2% to 6% in the proportion of high multiplicity ( z > 2) events. For the central pseudorapidity range, | η | ⪅ 1.5, scaling is approximately valid up to s = 540 GeV .

5 data tables
Table 1

THE SCALING VARIABLE Z IS N/MEAN(N). THE ERRORS ARE HIGHLY CORRELATED AND ARE BASED ON THE SQUARE ROOT OF THE NUMBER OF EVENTS IN THE BIN. IN THE CASE OF MULTIPLICITIES 2,4, AND 6, ADDITIONAL SYSTEMATIC ERRORS HAVE BEEN INCLUDED. ABOVE MULTIPLICITY 96 BINS HAVE BEEN COMBINED - THE VALUE IN THE TABLE IS THE AVERAGE OVER THE RANGE - NOT THE SUM. NOTE ALSO THAT IN FIG. 1 THE "Y-VALUE" IS MULTIPLIED BY THE MEAN MULTIPLICITY (29.1).

Table 2

CHARGED MULTIPLICITY (NON-CORRECTED) FOR EVENTS WHICH HAVE AT LEAST ONE TRACK WITH ABS(ETARAP) <1.5.

Table 3

CHARGED MULTIPLICITY (NON CORRECTED) FOR EVENTS WHICH HAVE AT LEAST ONE TRACK WITH ABS(ETARAP) <1.3.

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