Strangeness in nuclear collisions

Gazdzicki, Marek ; Rohrich, Dieter ;
Z.Phys. C71 (1996) 55-64, 1996.
Inspire Record 420462 DOI 10.17182/hepdata.13638

Data on the mean multiplicity of strange hadrons produced in minimum bias proton--proton and central nucleus--nucleus collisions at momenta between 2.8 and 400 GeV/c per nucleon have been compiled. The multiplicities for nucleon--nucleon interactions were constructed. The ratios of strange particle multiplicity to participant nucleon as well as to pion multiplicity are larger for central nucleus--nucleus collisions than for nucleon--nucleon interactions at all studied energies. The data at AGS energies suggest that the latter ratio saturates with increasing masses of the colliding nuclei. The strangeness to pion multiplicity ratio observed in nucleon--nucleon interactions increases with collision energy in the whole energy range studied. A qualitatively different behaviour is observed for central nucleus--nucleus collisions: the ratio rapidly increases when going from Dubna to AGS energies and changes little between AGS and SPS energies. This change in the behaviour can be related to the increase in the entropy production observed in central nucleus-nucleus collisions at the same energy range. The results are interpreted within a statistical approach. They are consistent with the hypothesis that the Quark Gluon Plasma is created at SPS energies, the critical collision energy being between AGS and SPS energies.

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Pion multiplicity in nuclear collisions

Gazdzicki, M. ; Roehrich, D. ;
Z.Phys. C65 (1995) 215-223, 1995.
Inspire Record 398172 DOI 10.17182/hepdata.14107
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Pion pair production in photon-photon collisions

Blinov, A.E. ; Blinov, V.E. ; Bondar, A.E. ; et al.
Z.Phys. C53 (1992) 33-39, 1992.
Inspire Record 335707 DOI 10.17182/hepdata.14772
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Kaon Pair Production in Proton--Proton Collisions

The ANKE collaboration Maeda, Y. ; Hartmann, M. ; Keshelashvili, I. ; et al.
Phys.Rev. C77 (2008) 015204, 2008.
Inspire Record 763646 DOI 10.17182/hepdata.25173

The differential and total cross sections for kaon pair production in the pp->ppK+K- reaction have been measured at three beam energies of 2.65, 2.70, and 2.83 GeV using the ANKE magnetic spectrometer at the COSY-Juelich accelerator. These near-threshold data are separated into pairs arising from the decay of the phi-meson and the remainder. For the non-phi selection, the ratio of the differential cross sections in terms of the K-p and K+p invariant masses is strongly peaked towards low masses. This effect can be described quantitatively by using a simple ansatz for the K-p final state interaction, where it is seen that the data are sensitive to the magnitude of an effective K-p scattering length. When allowance is made for a small number of phi events where the K- rescatters from the proton, the phi region is equally well described at all three energies. A very similar phenomenon is discovered in the ratio of the cross sections as functions of the K-pp and K+pp invariant masses and the identical final state interaction model is also very successful here. The world data on the energy dependence of the non-phi total cross section is also reproduced, except possibly for the results closest to threshold.

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Subthreshold K+ production in heavy ion collisions

Julien, J. ; Lebrun, D. ; Mougeot, A. ; et al.
Phys.Lett. B264 (1991) 269-273, 1991.
Inspire Record 304290 DOI 10.17182/hepdata.29376
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Strange meson enhancement in Pb Pb collisions

The NA44 collaboration Bearden, I. ; Boggild, H. ; Boissevain, J. ; et al.
Phys.Lett. B471 (1999) 6-12, 1999.
Inspire Record 504074 DOI 10.17182/hepdata.31360
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Subthreshold K+ production in proton nucleus collisions

Debowski, M. ; Barth, R. ; Boivin, M. ; et al.
Z.Phys. A356 (1996) 313-325, 1996.
Inspire Record 432858 DOI 10.17182/hepdata.16477

Double differential K+cross sections have been measured in p+C collisions at 1.2, 1.5 and 2.5 GeV beam energy and in p+Pb collisions at 1.2 and 1.5 GeV. The K+ spectrum taken at 2.5 GeV can be reproduced quantitatively by a model calculation which takes into account first chance proton-nucleon collisions and internal momentum with energy distribution of nucleons according to the spectral function. At 1.2 and 1.5 GeV beam energy the K+ data excess significantly the model predictions for first chance collisions. When taking secondary processes into account the results of the calculations are in much better agreement with the data.

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Proton-Proton Collisions at 4.2 Bev

Blue, M.H. ; Lord, J.J. ; Parks, J.G. ; et al.
Phys.Rev. 125 (1962) 1386-1393, 1962.
Inspire Record 944984 DOI 10.17182/hepdata.26806
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Hadron spectra in hadron - nucleus collisions

Armutliiski, D. ; Baatar, Ts. ; Batsaikhan, Ts. ; et al.
No Journal Information, 1991.
Inspire Record 319258 DOI 10.17182/hepdata.38698
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Proton-proton collisions at 3.5 GeV

Piserchio, R.J. ; Kalbach, R.M. ;
Nuovo Cim. 26 (1962) 729-739, 1962.
Inspire Record 1185010 DOI 10.17182/hepdata.37708
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Proton-proton collisions at 19.8 GeV/c

Abraham, F.F. ; Kalbach, R.M. ;
Nuovo Cim. 26 (1962) 717-728, 1962.
Inspire Record 1185008 DOI 10.17182/hepdata.37715

Elastic and inelastic 19.8 GeV/c proton-proton collisions in nuclear emulsion are examined using an external proton beam of the CERN Proton Synchrotron. Multiple scattering, blob density, range and angle measurements give the momentum spectra and angular distributions of secondary protons and pions. The partial cross-sections corresponding to inelastic interactions having two, four, six, eight, ten and twelve charged secondaries are found to be, respectively, (16.3±8.4) mb, (11.5 ± 6.0) mb, (4.3 ± 2.5) mb, (1.9 ± 1.3) mb, (0.5 ± 0.5) mb and (0.5±0.5)mb. The elastic cross-section is estimated to be (4.3±2.5) mb. The mean charged meson multiplicity for inelastic events is 3.7±0.5 and the average degree of inelasticity is 0.35±0.09. Strong forward and backward peaking is observed in the center-of-mass system for both secondary charged pions and protons. Distributions of energy, momentum and transverse momentum for identified charged secondaries are presented and compared with the results of work at other energies and with the results of a statistical theory of proton-proton collisions.

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Multihadron production in e+ e- collisions at high energy

Grilli, M. ; Iarocci, E. ; Spillantini, P. ; et al.
Nuovo Cim. A13 (1973) 593-644, 1973.
Inspire Record 87243 DOI 10.17182/hepdata.1179
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Production of Four Prong Final States in Photon-photon Collisions

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Rev. D37 (1988) 28, 1988.
Inspire Record 261630 DOI 10.17182/hepdata.3824
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Measurement of $K^+ K^-$ Production in $\gamma \gamma$ Collisions

The ARGUS collaboration Albrecht, H. ; Glaser, R. ; Harder, G. ; et al.
Z.Phys. C48 (1990) 183-190, 1990.
Inspire Record 284561 DOI 10.17182/hepdata.15151
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Hyperon production in proton - sulphur collisions at 200-GeV/c

The WA94 collaboration Abatzis, S. ; Andersen, E. ; Andrighetto, A. ; et al.
Phys.Lett. B400 (1997) 239-244, 1997.
Inspire Record 427129 DOI 10.17182/hepdata.12547
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The Transverse Energy Distribution in Hadron - Lead Collisions

Akesson, T. ; Choi, Y. ; Dam, P. ; et al.
Z.Phys. C38 (1988) 397, 1988.
Inspire Record 250759 DOI 10.17182/hepdata.15655
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Production of the F(0) Meson in Photon-photon Collisions

The CELLO collaboration Behrend, H.J. ; Fenner, H. ; Schachter, M.J. ; et al.
Z.Phys. C23 (1984) 223, 1984.
Inspire Record 199731 DOI 10.17182/hepdata.16320
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Anti-proton production in relativistic Si nucleus collisions

The E814 collaboration Barrette, J. ; Bellwied, R. ; Braun-Munzinger, P. ; et al.
Phys.Rev.Lett. 70 (1993) 1763-1766, 1993.
Inspire Record 358657 DOI 10.17182/hepdata.19760
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Pion and Kaon Pair Production in Photon-Photon Collisions

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Rev.Lett. 57 (1986) 404, 1986.
Inspire Record 228072 DOI 10.17182/hepdata.20204
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pi-Meson Production in 2.9-BeV p-p Collisions

Melissinos, A.C. ; Yamanouchi, T. ; Fazio, G.G. ; et al.
Phys.Rev. 128 (1962) 2373-2381, 1962.
Inspire Record 944979 DOI 10.17182/hepdata.26775

Detailed measurements of the production of charged π mesons in proton-proton collisions are reported. The observed results are compared with the "isobar" and "one-pion exchange" models and for single production are in agreement if only the "resonant" part of the π−p cross section is used and if the angular distribution cos16θ is introduced for the production of the N1* isobar. The effects of higher resonances are also considered.

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Hadron Production in Muon - Proton and Muon - Deuteron Collisions

Loomis, W.A. ; Gordon, B.A. ; Pipkin, F.M. ; et al.
Phys.Rev. D19 (1979) 2543-2571, 1979.
Inspire Record 132759 DOI 10.17182/hepdata.24303
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Kaon production in 200-GeV/nucleon nucleus-nucleus collisions

The HELIOS collaboration Akesson, T. ; Almehed, S. ; Angelis, A.L.S. ; et al.
Phys.Lett. B296 (1992) 273-278, 1992.
Inspire Record 338072 DOI 10.17182/hepdata.28995
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Sigma production in p-p collisions at 5 GeV/ c

Sondhi, I. ;
Phys.Lett. B26 (1968) 645-648, 1968.
Inspire Record 1389658 DOI 10.17182/hepdata.29305

The cross section for the reaction pp → Σ + K + n at 5 GeV/ c is measured to be 48.1 ± 3.5 μ b. The KΣ mass spectrum shows an enhancement at 1.86 GeV, which may due to the Δ (1920) resonance. Adequacy of the one-pion exchange model for the reaction is discussed. The cross section for the reaction pp → Σ + K o p is found to be 24.9 ± 2.3 μ b.

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Negative pion production in subthreshold heavy ion collisions

Suzuki, T. ; Fukuda, M. ; Ichihara, T. ; et al.
Phys.Lett. B257 (1991) 27-31, 1991.
Inspire Record 324305 DOI 10.17182/hepdata.29463
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Pion Pair Production in Photon-photon Collisions at Dci

The DM1-DM2 collaboration Ajaltouni, Z. ; Falvard, A. ; Jousset, J. ; et al.
Phys.Lett. B194 (1987) 573, 1987.
Inspire Record 248992 DOI 10.17182/hepdata.30109
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