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Study of the energy dependence of the underlying event in proton-antiproton collisions

The CDF collaboration Aaltonen, Timo Antero ; Amerio, Silvia ; Amidei, Dante E ; et al.
Phys.Rev. D92 (2015) 092009, 2015.
Inspire Record 1388868 DOI 10.17182/hepdata.70787

We study charged particle production (pT>0.5  GeV/c, |η|<0.8) in proton-antiproton collisions at total center-of-mass energies s=300  GeV, 900 GeV, and 1.96 TeV. We use the direction of the charged particle with the largest transverse momentum in each event to define three regions of η-ϕ space: “toward”, “away”, and “transverse.” The average number and the average scalar pT sum of charged particles in the transverse region are sensitive to the modeling of the “underlying event.” The transverse region is divided into a MAX and MIN transverse region, which helps separate the “hard component” (initial and final-state radiation) from the “beam-beam remnant” and multiple parton interaction components of the scattering. The center-of-mass energy dependence of the various components of the event is studied in detail. The data presented here can be used to constrain and improve QCD Monte Carlo models, resulting in more precise predictions at the LHC energies of 13 and 14 TeV.

24 data tables

Average charged particle multiplicity for charged particles with pT > 0.5 GeV and |eta| < 0.8 in the TransMAX region as defined by the leading charged particle, as a function of the transverse momentum of the leading charged-particle pTmax, at 1.96 TeV.

Average charged particle multiplicity for charged particles with pT > 0.5 GeV and |eta| < 0.8 in the TransMIN region as defined by the leading charged particle, as a function of the transverse momentum of the leading charged-particle pTmax, at 1.96 TeV.

Average charged particle multiplicity for charged particles with pT > 0.5 GeV and |eta| < 0.8 in the TransAVE region as defined by the leading charged particle, as a function of the transverse momentum of the leading charged-particle pTmax, at 1.96 TeV.

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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. B138 (1984) 304-310, 1984.
Inspire Record 199419 DOI 10.17182/hepdata.30571
5 data tables

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).

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

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

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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. C27 (1985) 1, 1985.
Inspire Record 202797 DOI 10.17182/hepdata.16116
8 data tables
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Pseudorapidity distribution of charged particles in $\bar{p} p$ collisions at $\sqrt{s}$ = 630-GeV

Harr, R. ; Liapis, C. ; Karchin, P. ; et al.
Phys.Lett. B401 (1997) 176-180, 1997.
Inspire Record 440823 DOI 10.17182/hepdata.28295

Using a silicon vertex detector, we measure the charged particle pseudorapidity distribution over the range 1.5 to 5.5 using data collected from PbarP collisions at root s = 630 GeV. With a data sample of 3 million events, we deduce a result with an overall normalization uncertainty of 5%, and typical bin to bin errors of a few percent. We compare our result to the measurement of UA5, and the distribution generated by the Lund Monte Carlo with default settings. This is only the second measurement at this level of precision, and only the second measurement for pseudorapidity greater than 3.

1 data table

No description provided.


phi meson production from p anti-p collisions at s**(1/2) = 1.8-TeV

The E735 collaboration Alexopoulos, T. ; Allen, C. ; Anderson, E.W. ; et al.
Z.Phys. C67 (1995) 411-416, 1995.
Inspire Record 405368 DOI 10.17182/hepdata.14115
3 data tables

Corrected phi meson transverse momentum distribution at rapidity = 0.

Total inclusive cross section.

Ratio of phi to rho0 production in high and low charged particle multiplicity events.


Transverse momentum spectra of charged particles in $p \bar{p}$ collisions at $\sqrt{s}$ = 630-GeV

Bocquet, G. ; Norton, A. ; Wang, H.Q. ; et al.
Phys.Lett. B366 (1996) 434-440, 1996.
Inspire Record 403649 DOI 10.17182/hepdata.48062
11 data tables

No description provided.

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Jet fragmentation properties of $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 65 (1990) 968-971, 1990.
Inspire Record 297585 DOI 10.17182/hepdata.19919
1 data table

No description provided.


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. C40 (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

No description provided.


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

The UA5 collaboration Ansorge, R.E. ; Asman, B. ; Booth, C.N. ; et al.
Z.Phys. C33 (1986) 175, 1986.
Inspire Record 232615 DOI 10.17182/hepdata.15812
3 data tables

Single diffractive cross sections.

Average number of single diffractive charged particles.

Estimate of the double diffractive cross sections.


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. C28 (1985) 163, 1985.
Inspire Record 217418 DOI 10.17182/hepdata.1974
11 data tables

No description provided.

No description provided.

No description provided.

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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. B160 (1985) 193-198, 1985.
Inspire Record 213986 DOI 10.17182/hepdata.6545
31 data tables

Data for full phase space.

No description provided.

No description provided.

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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. C24 (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

No description provided.


Search for narrow structure in proton‐antiproton annihilation cross sections from 1900 to 1960 MeV

Lowenstein, D.I. ; Pealsee, D.C. ; Miller, R.J. ; et al.
Phys.Lett. B158 (1985) 505-510, 1985.
Inspire Record 221435 DOI 10.17182/hepdata.30389
1 data table

Fit of form A + B/D gives A = 8.5 +- 2.5mb and B = 40.7 +- 1.3mb in the mass range 1900 to 1960 MeV.


DIFFERENCES BETWEEN ANTI-P P AND P P INTERACTIONS AT 8.8-GeV/c AND THEIR RELATIONSHIP TO ANTI-P P ANNIHILATIONS

Booth, C.n. ; Ansorge, R.e. ; Carter, J.r. ; et al.
Phys.Rev. D27 (1983) 2018, 1983.
Inspire Record 194364 DOI 10.17182/hepdata.23838
27 data tables

No description provided.

No description provided.

No description provided.

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Charged Particle Multiplicity Distributions in Proton Anti-proton Collisions at 540-{GeV} Center-of-mass Energy

The UA1 collaboration Arnison, G. ; Astbury, A. ; Aubert, Bernard ; et al.
Phys.Lett. B123 (1983) 108-114, 1983.
Inspire Record 182553 DOI 10.17182/hepdata.30779
6 data tables

Pseudorapidity density distribution for all charged multiplicities corrected for acceptance and backgrounds by excluding NSD events. Data have been read from the plot.

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Multiparticle Production on Hydrogen, Argon and Xenon Targets in a Streamer Chamber by 200-GeV/c Proton and anti-Proton Beams

The Bari-Cracow-Liverpool-Munich-Nijmegen collaboration De Marzo, C. ; De Palma, M. ; Distante, A. ; et al.
Phys.Rev. D26 (1982) 1019, 1982.
Inspire Record 177100 DOI 10.17182/hepdata.4113
10 data tables

No description provided.

No description provided.

'PRODUCED PARTICLES' (SEE CONDITIONS).

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Experimental Determination of Elastic and Topological Cross-sections in 48.9-GeV/c anti-p p Interactions

Zissa, D.E. ; Barnes, V.E. ; Carmony, D.D. ; et al.
Phys.Rev. D21 (1980) 3059, 1980.
Inspire Record 8434 DOI 10.17182/hepdata.24179

The elastic and topological p¯p cross sections have been measured at 48.9 GeV/c in the Fermilab proportional-wire-chamber-30-in.-bubble-chamber hybrid spectrometer. The elastic cross section is 7.81±0.24 mb and the slope of the elastic differential cross section at t=0 is 13.4±0.8 GeV−2. Further, the moments of the inelastic topological-cross-section distribution are 〈nc〉=5.69±0.03, 〈nc〉D=2.10±0.02, and f2cc=1.67±0.12.

3 data tables

Axis error includes +- 0.0/0.0 contribution (?////DALITZ PAIRS. VEES AND GAMMA CONVERSIONS NEAR THE VERTEX WERE DETERMINED TO BE NEGLIGIBLE. LOW -T ELASTIC EVENTS//ODD-PRONG EVENTS APPARANTLY NOT CAUSED BY SECONDARY INTERACTIONS WERE MOVED TO THE NEXT HIGHER MULTIPLICITY ON THE ASSUMPTION THAT A SHORT TRACK WAS NOTVISIBLETOTAL AP-P CROSS SECTION OF 43.86+-0.25 MB FROM A.S.CARROL ET AL.PRL 33, 928(1974) WAS USED FOR NORMALIZATION).

Axis error includes +- 0.0/0.0 contribution (?////DALITZ PAIRS. VEES AND GAMMA CONVERSIONS NEAR THE VERTEX WERE DETERMINED TO BE NEGLIGIBLE. LOW -T ELASTIC EVENTS//ODD-PRONG EVENTS APPARANTLY NOT CAUSED BY SECONDARY INTERACTIONS WERE MOVED TO THE NEXT HIGHER MULTIPLICITY ON THE ASSUMPTION THAT A SHORT TRACK WAS NOTVISIBLETOTAL AP-P CROSS SECTION OF 43.86+-0.25 MB FROM A.S.CARROL ET AL.PRL 33, 928(1974) WAS USED FOR NORMALIZATION).

No description provided.


CROSS-SECTIONS, AVERAGE MULTIPLICITIES AND ENERGY FRACTIONS OF NEUTRAL pi- AND K MESONS IN anti-p p ANNIHILATIONS AT 22.4-GeV/c

Batyunya, B.V. ; Boguslavsky, I.V. ; Gramenitsky, I.M. ; et al.
Conference Paper, 1982.
Inspire Record 179204 DOI 10.17182/hepdata.17656
7 data tables

No description provided.

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No description provided.

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GENERAL FEATURES OF ANTI-P P INTERACTIONS AT 7.3-GEV/C

Patel, G.D. ; Johnson, P. ; Mason, P. ; et al.
Z.Phys. C12 (1982) 189-202, 1982.
Inspire Record 179888 DOI 10.17182/hepdata.2239
26 data tables

No description provided.

No description provided.

ANNIHILATION AND NON-ANNIHILATION TOPOLOGICAL CROSS SECTIONS.

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No description provided.

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A Comparison of $\bar{p} p$ and $p p$ Interactions in the Central Region at $\sqrt{s}=53$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett. B108 (1982) 58-62, 1982.
Inspire Record 168036 DOI 10.17182/hepdata.31012
3 data tables

No description provided.

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No description provided.


A Comparison of Hadron Production in $p \bar{p}$ and $p p$ Collisions in the Central Region at $\sqrt{s}=53$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Nucl.Phys. B228 (1983) 409-423, 1983.
Inspire Record 190653 DOI 10.17182/hepdata.37131
1 data table

No description provided.