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2. Transverse dynamics of Pb-Pb collisions at 40 AGeV/cviewed by strange hadrons

Author

Antinori, F, Bacon, P, Badal, A, Barbera, R, Belogianni, A, Bloodworth, I J, Bombara, M, Bruno, G E, Bull, S A, Caliandro, R, Campbell, M, Carena, W, Carrer, N, Clarke, R F, Dainese, A, Bari, D Di, Liberto, S Di, Divi, R, Elia, D, Evans, D, Feofilov, G A, Fini, R A, Ganoti, P, Ghidini, B, Grella, G, Helstrup, H, Hetland, K F, Holme, A K, Jacholkowski, A, Jones, G T, Jovanovic, P, Jusko, A, Kamermans, R, Kinson, J B, Knudson, K, Kondratiev, V, Kr, I, Krav, A, Kuijer, P, Lenti, V, Lietava, R, L, G, Manzari, V, Mazzoni, M A, Meddi, F, Michalon, A, Morando, M, Norman, P I, Palmeri, A, Pappalardo, G S, Pastir, B, Platt, R J, Quercigh, E, Riggi, F, R, D, Romano, G, Romita, R, Safa, K, S, L, Schillings, E, Segato, G, Sen, M, Sen, R, Snoeys, W, Soramel, F, Spyropoulou, M, Staroba, P, Turrisi, R, Tveter, T S, Urb, J, van, P, Ven, de, Vande, P, Vascotto, A, Vik, T, Villalobos, O, Vinogradov, L, Virgili, T, Votruba, M F, Vrl, J, and, áková, and Z, P

Abstract

The transverse mass spectra of K0S, ?, ? and ? particles produced in Pb-Pb collisions at 40 AGeV/chave been studied for a sample of events corresponding to the most central 53% of the inelastic Pb-Pb cross section. We analyse the distributions in the framework of a parameterized model inspired by hydrodynamics. The dependence of the freeze-out parameters on particle species and event centrality is discussed and comparisons with results at higher energy are shown.

Published
2006

3. Rapidity distributions around mid-rapidity of strange particles in Pb–Pb collisions at 158 A GeV/c

Author

Collaboration, NA57 NC, Antinori, F FA, Bacon, P PB, Badalà, A AB, Barbera, R RB, Belogianni, A AB, Bloodworth, I IJB, Bombara, M MB, Bruno, G GEB, Bull, S SAB, Caliandro, R RC, Campbell, M MC, Carena, W WC, Carrer, N NC, Clarke, R RFC, Dainese, A AD, Bari, D DDB, Liberto, S SDL, Divià, R RD, Elia, D DE, Evans, D DE, Feofilov, G GAF, Fini, R RAF, Ganoti, P PG, Ghidini, B BG, Grella, G GG, Helstrup, H HH, Hetland, K KFH, Holme, A AKH, Jacholkowski, A AJ, Jones, G GTJ, Jovanovic, P PJ, Jusko, A AJ, Kamermans, R RK, Kinson, J JBK, Knudson, K KK, Kondratiev, V VK, Králik, I IK, Kravčáková, A AK, Kuijer, P PK, Lenti, V VL, Lietava, R RL, Løvhøiden, G GL, Manzari, V VM, Mazzoni, M MAM, Meddi, F FM, Michalon, A AM, Morando, M MM, Norman, P PIN, Palmeri, A AP, Pappalardo, G GSP, Pastirčák, B BP, Platt, R RJP, Quercigh, E EQ, Riggi, F FR, Röhrich, D DR, Romano, G GR, Šafařík, K KŠ, Šándor, L LŠ, Schillings, E ES, Segato, G GS, Sené, M MS, Sené, R RS, Snoeys, W WS, Soramel, F FS, Spyropoulou-Stassinaki, M MS, Staroba, P PS, Turrisi, R RT, Tveter, T TST, Urbán, J JU, Ven, P Pvd de, Vyvre, P PVV, Vascotto, A AV, Vik, T TV, Baillie, O OVB, Vinogradov, L LV, Virgili, T TV, Votruba, M MFV, Vrláková, J JV, and Závada, P PZ

Abstract

The production at central rapidity of K0S, Λ, Ξ and Ω particles in Pb–Pb collisions at 158 A GeV/c has been measured by the NA57 experiment over a centrality range corresponding to the most central 53% of the inelastic Pb–Pb cross section. In this paper we present the rapidity distribution of each particle in the central rapidity unit as a function of the event centrality. The distributions are analysed based on hydrodynamical models of the collisions.

Published
2005

4. Multiplicity of charged particles in Pb–Pb collisions at SPS energies

Author

Collaboration, NA57 NC, Antinori, F FA, Bacon, P PB, Badalà, A AB, Barbera, R RB, Belogianni, A AB, Bhasin, A AB, Bloodworth, I IJB, Bombara, M MB, Bruno, G GEB, Bull, S SAB, Caliandro, R RC, Campbell, M MC, Carena, W WC, Carrer, N NC, Clarke, R RFC, Dainese, A AD, Haas, A APd de, Rijke, P PCd de, Bari, D DDB, Liberto, S SDL, Divià, R RD, Elia, D DE, Evans, D DE, Feofilov, G GAF, Fini, R RAF, Ganoti, P PG, Ghidini, B BG, Grella, G GG, Helstrup, H HH, Hetland, K KFH, Holme, A AKH, Jacholkowski, A AJ, Jones, G GTJ, Jovanovic, P PJ, Jusko, A AJ, Kamermans, R RK, Kinson, J JBK, Knudson, K KK, Kolozhvari, A AAK, Kondratiev, V VK, Králik, I IK, Kravčáková, A AK, Kuijer, P PK, Lenti, V VL, Lietava, R RL, Løvhøiden, G GL, Manzari, V VM, Martinská, G GM, Mazzoni, M MAM, Meddi, F FM, Michalon, A AM, Morando, M MM, Nappi, E EN, Navach, F FN, Norman, P PIN, Palmeri, A AP, Pappalardo, G GSP, Pastirčák, B BP, Pišút, J JP, Pišútová, N NP, Platt, R RJP, Posa, F FP, Quercigh, E EQ, Riggi, F FR, Röhrich, D DR, Romano, G GR, Šafařík, K KŠ, Šándor, L LŠ, Schillings, E ES, Segato, G GS, Sené, M MS, Sené, R RS, Snoeys, W WS, Soramel, F FS, Stassinaki, M MSS, Staroba, P PS, Toulina, T TAT, Turrisi, R RT, Tveter, T TST, Urbán, J JU, Valiev, F FFV, Brink, A Avd den, Ven, P Pvd de, Vyvre, P PVV, Eijndhoven, N NvE, Hunen, J JvH, Vascotto, A AV, Vik, T TV, Baillie, O OVB, Vinogradov, L LV, Virgili, T TV, Votruba, M MFV, Vrláková, J JV, and Závada, P PZ

Abstract

The multiplicity of charged particles in the central rapidity region has been measured by the NA57 experiment in Pb–Pb collisions at the CERN SPS at two beam momenta: 158 A GeV/c and 40 A GeV/c. The value of dNch/dη at the maximum has been determined and its behaviour as a function of centrality has been studied in the centrality range covered by NA57 (about 50% of the inelastic cross section). The multiplicity increase is compatible with a logarithmic dependence on the centre of mass energy. The results are compared with those from other experiments and with the VENUS and RQMD models.

Published
2005

5. MRI of the intraorbital optic nerve in patients with autosomal dominant optic atrophy

Author

Votruba, M., Leary, S., Losseff, N., Bhattacharya, S. S., Moore, A. T., Miller, D. H., and Moseley, I. F.

Abstract

Abstract: Measurements of the intraorbital optic nerve were made using high-resolution coronal MRI in 10 adults with autosomal dominant optic atrophy. Comparisons were made with previous studies of 10 normal adult subjects. The cross-sectional diameters of the optic nerve and the perineural subarachnoid space were measured and a ratio of there diameters at anterior, mid and posterior positions along the optic nerve was determined. We found a statistically significant difference in the mean optic nerve: sheath ratio between the control group and patients with autosomal dominant optic atrophy. At anterior, mid and posterior locations along the optic nerve it is significantly smaller in patients with optic atrophy. We have demonstrated that the loss of ganglion cells, previously documented in dominant optic atrophy, is associated with a significant loss of optic nerve tissue and thinning of the nerve along its length.

Published
2000
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6. Study of the centrally producer ππ andK <img src="/fulltext-image.asp?format=htmlnonpaginated&src=PR7622018MG84431_html\10052_2005_Article_BF01548557_TeX2GIFIE1.gif" border="0" alt=" $$\bar K$$ " /> systems at 85 and 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Baillie, O. Villalobos, and Votruba, M. F.

Abstract

We have studied the ππ andK " systems centrally produced in proton proton collisions at 300 GeV/c and π+/p proton collisions at 85 GeV/c using the CERN Ω spectrometer. Clear evidence forS*/fo(975) production is observed. An analysis performed on the π+ π− mass spectrum in the 1.0 GeV region, using a coupled channel formalism, shows that it is possible to describe theS*/fo(975) effect with one single resonance once interference of theS*/fo(975) with theS-wave background is introduced. The resultingS*/fo(975) parameters aremo=979±4MeV,gπ=0.28±0.04,gK=0.56±0.18 corresponding to a pole position on sheet II at (1001±2)−i(36±4) MeV. Evidence is also found for a structure having a mass of 1472±12 MeV and a width of 195±33 MeV.

Published
1991
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7. A study of the centrally producedK*0 <img src="/fulltext-image.asp?format=htmlnonpaginated&src=W37533822481631M_html\10052_2005_Article_BF01621028_TeX2GIFIE1.gif" border="0" alt=" $$K^{*0} \bar K^{*0} $$ " /> final state in the reac

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., and Zitoun, R.

Abstract

The reactionpp→pf(K+K-π+π-)ps, where theK+K− π+π- system is centrally produced, has been studied at 300 GeV/c. TheK*0 " final state has been observed and the cross sections for its central production are found to be the same at 300 and 85 GeV/c. TheK*0 " final state appears to be produced as a non-resonant threshold enhancement.

Published
1990
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8. The reactionsK−p→π∓Σ(1385)± at 8.25 GeV/c

Author

Baubillier, M., Bloodworth, I. J., Burns, A., Carney, J. N., Cox, G. F., Dore, U., Kinson, J. B., Knudson, K., Levy, F., Negus, P. J., Oh, B. Y., Quercigh, E., Scarr, J. M., Smith, G. A., Baillie, O. Villalobos, Votruba, M. F., Whitmore, J., and Zitoun, R.

Abstract

The reactionsK−p→π∓Σ(1385)± are studied at an incident laboratory momentum of 8.25 GeV/c using data from a high statistics (≃180 events/μb) bubble chamber experiment. In the case of the reactionK−p→π−Σ(1385)+ an amplitude analysis is performed and the complete Σ(1385)+ spin density matrix is extracted as a function oft′. The results are compared with the predictions of the additive quark model. In the case of the reactionK−p→π+Σ(1385)− the cross-sections for forward and backward production are determined.

Published
1984
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9. Study of theπ+π−γ system centrally produced in the reactionpp→pf(π+π−γ)ps at 300 GeV/c

Author

Armstrong, T. A., Barnes, R. P., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., DiBari, D., Dodenhoff, C. J., Evangelista, C., Evans, D., Ghidini, B., French, B. R., Girone, M., Jacholkowski, A., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Manzari, V., Navach, F., Palano, A., Quercigh, E., Sené, M., Sené, R., Vassiliadis, G., Baillie, O. Villalobos, and Votruba, M. F.

Abstract

The reactionpp→pf(π+π−γ)ps, where theπ+π−γ system is centrally produced, has been studied at 300 GeV/c. Theπ+π−γ mass spectrum shows evidence for aρ0γ decay mode of theη′ (958) andf1 (1285). The branching ratio (f1(1285)→ηπ+π+)/(f1(1285)→ρ0γ) is found to be 5.0±0.7. No evidence is found for aρ0(770)γ decay mode of theE/f1 (1420) for which an upper limit BR (E/f1(1420)→ρ0γ)<0.08 at 95% CL is found.

Published
1992
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10. Transverse momentum distributions for meson resonances at central rapidity andPT≧2 GeV/c

Author

Belogianni, A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Di Bari, D., Evangelista, C., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Narjoux, J. L., Navach, F., Quercigh, E., Šafařík, K., Sené, M., Sené, R., Stassinaki-Spyropoulou, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Votruba, M. F., and Zitoun, R.

Abstract

The transverse momentum distributions for " and ϕ (1020) have been studied in thept region between 2 and 4 GeV/c and central rapidity. The data analysed come from the WA77 experiment at CERN with a 300 GeV/c π− beam incident on a Be target. These distributions are well described by the functionpt−n withn∼8. A sample of simulated events from the Lund Monte Carlo in the same experimental conditions reproduces well the data.

Published
1993
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11. Study of the centrally produced ωρ0 and ωω systems inpp interactions at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., and Zito, G.

Abstract

We have performed a search for vector-vector final states centrally produced in proton proton interactions at 300 GeV/c using the CERN O spectrometer. Evidence is found for ??0 production in the reactionpp?pf(2p+2p-2p0)ps and for ?? production in the reactionpp?pf(2p+2p-2p0)ps. However no evidence is found for ?ø production in the reactionpp?pf(K+K-p+p-p0)ps.

Published
1993
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12. Further study of theE/f1 (1420) meson in central production

Author

Armstrong, T. A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Dodenhoff, C. J., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Vassiliadis, G., Villalobos Baillie, O., Votruba, M. F., and Zito, G.

Abstract

We have studied the reactions " where the " system is centrally produced, at 85 GeV/c and 300 GeV/c using the CERN Omega spectrometer. A spin-parity analysis of theKS0K±p± system shows the presence of a strongJPC=1++ signal which we identify as theE/f1 (1420) meson. We also find evidence for the decayE/f1(1420)?KS0KS0p0 which determines theC-parity of this state to be positive. Alternative explanations of the data have been tested and ruled out. Hence we obtain the quantum numbers of theE/f1 (1420) to beIG(JPC)=0+(1+).

Published
1992
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13. Shape distortions of meson resonances produced in hadron interactions atPT≧2 GeV/c

Author

Bellogianni, A., Benayoun, M., Bloodworth, I., Carney, J., DiBari, D., Elia, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Narjoux, J., Navach, F., Quercigh, E., Šařík, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M., and Zitoun, R.

Abstract

We study the shape of the invariant mass spectra of several resonances produced atPT≧2.0 GeV/c and observed through two-particle final states, namely thef2(1270),K*(892), ",K*(1430), and " mesons. The data sample comes from π− Be interactions atPlab=150 GeV/c and 300 GeV/c which have been collected using the OMEGA spectrometer at CERN. We find that although these meson resonances have their masses and widths consistent with the corresponding world average values, their shapes are all subject to the same kind of distortion: their low-mass tail is enhanced while their high-mass tail is sharply cut. This observation indicates that meson resonances produced in the fragmentation of quarks and gluons are distorted by the same damping factor in a way which preserves their masses and lifetimes.

Published
1994
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14. Clinical features, molecular genetics, and pathophysiology of dominant optic atrophy

Author

Votruba, M., Bhattacharya, S.S., and Moore, A.T.

Abstract

Inherited optic neuropathies are a significant cause of childhood and adult blindness and dominant optic atrophy (DOA) is the most common form of autosomally inherited (non-glaucomatous) optic neuropathy. Patients with DOA present with an insidious onset of bilateral visual loss and they characteristically have temporal optic nerve pallor, centrocaecal visual field scotoma, and a colour vision deficit, which is frequently blue-yellow. Evidence from histological and electrophysiological studies suggests that the pathology is confined to the retinal ganglion cell. A gene for dominant optic atrophy (OPA1) has been mapped to chromosome 3q28-qter, and studies are under way to refine the genetic interval in which the gene lies, to map the region physically, and hence to clone the gene. A second locus for dominant optic atrophy has recently been shown to map to chromosome 18q12.2-12.3 near the Kidd blood group locus. The cloning of genes for dominant optic atrophy will provide important insights into the pathophysiology of the retinal ganglion cell in health and disease. These insights may prove to be of great value in the understanding of other primary ganglion cell diseases, such as the mitochondrially inherited Leber's hereditary optic neuropathy and other diseases associated with ganglion cell loss, such as glaucoma.

Published
1998

15. Electrophysiological findings in Dominant Optic Atrophy (DOA) linking to the OPA1 locus on chromosome 3q 28-qter

Author

Holder, G.E., Votruba, M., Carter, A.C., Bhattacharya, S.S., Fitzke, F.W., and Moore, A.T.

Abstract

Abstract: Pattern and flash visual evoked cortical potentials (PVEP, FVEP), and pattern electroretinograms, (PERG) were recorded in 13 affected individuals from 8 families with DOA. These were selected as representative from 87 affected members of 21 pedigrees with DOA who were examined, and who underwent genetic linkage analysis. Linkage to the OPA1 locus on chromosome 3q 28-qter was demonstrated in all families. VA ranged from 6/9 to HM; visual fields showed a variable centro-caecal defect; SLO (when performed) showed diffuse nerve fibre loss; MRI (when performed) showed small intra-orbital optic nerves. In 9/13 patients the PVEP was absent in one or both eyes. Most recordable PVEPs were of abnormal latency, but the delays were not marked (peak times 116–135 msec); amplitudes were low or subnormal. PERG fell within the normal range in 9 eyes of 7 patients. 14 eyes showed an abnormal N95:P50 ratio in keeping with ganglion cell dysfunction. Some severely affected eyes showed P50 component involvement, but in no eye was the PERG extinguished. Significant interocular asymmetries in at least one electrophysiological measure were present in 6/13 patients. Colour contrast thresholds were significantly elevated for all three colour confusion axes, with tritan being most affected.

Published
1998
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16. A study of the centrally produced π+π−π0 system formed in the reactionpp→pf(π+π−π0)ps at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Villalobos Baillie, O., and Votruba, M. F.

Abstract

The reactionpp→pf(π+π−π0)ps, where the π+π−π0 system is centrally produced, has been studied at 300 GeV/c. The π+π−π0 mass spectrum shows evidence for the η, ω anda2 (1320) as well as an enhancement in thea1 (1260) region. A Dalitz plot analysis of the π+π−π0 system has been performed. Thea1 (1260) parameters coming from the fit of the 1+S wave arem=1208±15 MeV and Γ=430±50 MeV. No evidence is found for theh1(1170) orh1(1380).

Published
1990
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17. Demonstration of a founder effect and fine mapping of dominant optic atrophy locus on 3q28-qter by linkage disequilibrium method

Author

Votruba, M., Moore, Anthony T., and Bhattacharya, Shomi S.

Abstract

Abstract: Dominant optic atrophy, a hereditary optic neuropathy causing decreased visual acuity, colour vision deficits, a centro-caecal scotoma and optic nerve pallor, has been mapped to a genetic interval of 1.4 cM between loci D3S3669 and D3S3562 on chromosome 3q28-qter. In order to further refine the critical disease interval, and to test the power of haplotype analysis and linkage disequilibrium mapping, we identified a total of 38 families with dominant optic atrophy, unrelated on the basis of genealogy, from a data base of genetic eye disease families originating from the British Isles. They were studied with 12 highly polymorphic microsatellite markers spanning a region of 12 cM around the dominant optic atrophy locus (OPA1). Allelic frequency analysis [chi-squared test, likeli-hood ratio test (LRT) and P values] and haplotype parsimony analysis showed evidence of a founder effect in 36 of the 38 pedigrees. Six markers (D3S3669, D3S1523, D3S3642, D3S2305, D3S3590 and D3S3562), spanning 1.4 cM across the disease-associated region, demonstrated significant linkage disequilibrium by LRT (P < 0.05). A peak LRT value of 10.86 (P < 0.0005, λ = 0.4) occurred at D3S3669. On linkage disequilibrium multipoint analysis the maximum lod score of 8.01 is achieved at D3S1523, and 95% confidence intervals suggest that OPA1 lies within ca. 400 kb of D3S1523.

Published
1998
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18. Observation of the reaction K-p→B-Y*+at 8.25 GeV/c

Author

Bloodworth, I. J., Carney, J. N., Cowan, C. A., Cox, G. F., Kinson, J. B., De Lima, C. J., MacDermott, M., Shiers, J. C., Votruba, M. F., Bossen, G. J., Burns, A., Dore, U., Gavillet, Ph., Loverre, P. F., Quercigh, E., McCann, H., Negus, P. J., Scare, J. M., Oh, B. H., Peatap, M., Smith, G. A., Whitmore, J., Baubillier, M., Levy, F., Rivoal, M., Teodoro, D., and Zitoun, R.

Published
1980
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19. Study of Φ and f2(1270) meson polarization atpT≥2 GeV/c in π- interactions at CERN SPS

Author

Belogianni, A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Di Bari, D., Elia, D., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Krumstein, Z. V., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Merekov, Yu. P., Narjoux, J. L., Navach, F., Quercigh, E., Satarik, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M. F., and Zitoun, Z.

Abstract

We present the analysis of data samples taken by the WA77 experiment for p- interactions at 300 and 150 GeV/c. The trigger selects a pair of oppositely charged particles withpT=2 GeV/c balancing the transverse momentum of a third high-pT track. The primary aim of this experiment was the search for higher-twist production, mainly that of vector mesons. Since there are definite predictions for the polarization of mesons produced in fragmentation and through the higher-twist mechanism, we study the polarization properties of clearly identified mesons, namely the F and f2(1270) mesons. The results are compatible with no polarization. This can be interpreted as a production dominantly due to parton fragmentation.

Published
1994
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20. Study of the ηπ+π− system centrally producedin the reactionpp→pf(ηπ+π−)ps at 300 GeV/c

Author

Armstrong, T. A., Barnes, R. P., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Di Bari, D., Dodenhoff, C. J., Evans, D., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Manzari, V., Navach, F., Palano, A., Quercigh, E., Sené, M., Sené, R., Vassiliadis, G., Baillie, O. Villalobos, and Votruba, M. F.

Abstract

The reactionpp→pf(ηπ+π−)ps where the ηπ+π− system is centrally produced has been studied at 300 GeV/c incident momentum at the CERN Ω spectrometer. The ηπ± mass spectrum shows a strong δ/a0(980) signal having a mass of 984±4 and Γ=95±14 MeV. The ηπ+π− mass spectrum shows η′ andf1(1285) signals over little background. A spin-parity analysis of the ηπ+π− system shows evidence for aJPC=1++ peak at thef1(1285) mass but no evidence for the pseudoscalar states η(1270) andl/η(1440). No evidence is found for the ηππ decay of theE/f1(1420) meson for which we set an upper limit BR(E/f1(1420)→ηππ)<0.1 at 95% cl.

Published
1991
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21. Baryon antibaryon production in the central region at 85 GeV/c

Author

Armstrong, T., Bloodworth, I., Carney, J., Childs, R., French, B., Ghidini, B., Kinson, J., Lenti, V., Palano, A., Vassiliadis, G., Villalobos Baillie, O., Votruba, M., Zito, G., and Zitoun, R.

Abstract

In a search for glueballs and exotic states decaying into baryons and antibaryons we have investigated the production of baryon antibaryon pairs produced centrally in the reactions π+/pp → π+/p(X0)p at 85 GeV/c. In particular, channels whereX0 goes to " and " have been observed. No significant new structure is observed in the mass spectra.

Published
1987
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22. Study of the centrally producedK10K± π∓ system at 85 GeV/c

Author

Armstrong, T. A., Bloodworth, I. J., Carney, J. N., French, B. R., Ghidini, B., Kinson, J. B., Lenti, V., Palano, A., Print, I. C., Shaylor, H. R., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. E., Zito, G., and Zitoun, R.

Abstract

We have analyzed theK10K± p± system in the reactions p+/pp?p+/p(K10K± p±)p. A spin-parity analysis of theK10K± p± system in the “4C” channel confirms the existence of the 1++E meson which decays mainly throughK* ". The data allow the presence of a 0-+ wave at a level of 14% of theE/? signal. The production ofD andE mesons in the channels where theK10K± p± system is produced along with a p0 or p+p- system is suppressed.

Published
1987
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23. Study of theK+K− π+ π− system centrally produced in the reactions π+p→π+(K+K− π+ π−)p andpp

Author

Armstrong, T. A., Bloodworth, I. J., Carney, J. N., French, B. R., Ghidini, B., Kinson, J. B., Lenti, V., Palano, A., Print, I. C., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., and Zitoun, R.

Abstract

The reactions π+p→π+(K+K− π+ π−p andpp→p(K+K− π+ π−)p where the (K+K− π+ π−) system is centrally produced have been studied at 85 GeV/c. 48% of the final state proceeds through single or double vector meson resonant production i.e.,K*0(890) (37%), ϕ (4%),ρ0 (7%). Evidence is found for associatedK*0 (890) "*o (890) production (6.4±1.1%) with a cross section ten times higher than that found for associated ϕ ϕ production in the same experiment.

Published
1987
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24. Search for higher twists in meson resonance production in π−N interactions atPT≥2 GeV/c

Author

Bellogianni, A., Benayoun, M., Bloodworth, I., Carney, J., Bari, D., Elia, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph, Malamant, A., Manzari, V., Narjoux, J., Navach, F., Quercigh, E., Šafařík, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M., and Zitoun, R.

Abstract

We study the production of meson resonance atpT≥2 GeV/c inπ−Be interactions at two beam energies (150 and 300 GeV/c). The motivation is to look for the higher twist (HT) production mechanism, expected to exist besides standard hadron production through the fragmentation process of scattered quarks and gluons, the so-called leading twist (LT) mechanism. We show that the φ, K*0(892) andK*0(892) are found free from HT effects with a good accuracy, as expected from HT estimates and QCD sum rules. The magnitudes of thef2(1270) andρ0mesons signals are found larger than expected from the standard Lund (LT) Monte Carlo and from information provided bye+e−annihilation experiments. The possible connection of these excesses with HT physics is discussed. We also report the first evidence for the production off0(975) mesons in hadronic experiments at largepT.

Published
1995
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25. The influence of IAA on the uptake of potassium, calcium, magnesium, water absorption and growth in young maize seedlings

Author

Votrubová, Olga and Votruba, M.

Abstract

The influence of IAA in two concentrations (10−8M and 10−5M) on relations between growth, water absorption and cation uptake and accumulation was tested.IAAin a higher concentration retarded growth remarkably. First of all, potassium uptake and water absorption were significantly decreased while the uptake of divalent cations was affected later and less remarkably. 10−8M IAA accelerated the growth rate slightly together with acceleration of water absorption and cation uptake.

Published
1986
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26. Study of the π+π+π-π-system centrally 0 produced by incident π+andpbeams at 85 GeV/c

Author

Armstrong, T. A., Bloodworth, I. J., Carney, J. N., French, B. R., Ghidini, B., Kinson, J. B., Kirk, A., Lenti, V., Palano, A., Print, I. C., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., and Zitoun, R.

Abstract

The reactions π+p→π+(π+π+π-π-)pandpp→p(π+π+π-π-)p, where the (π+π+π-π-) system is centrally produced have been studied at 85 GeV/c. The π+π+π-π-mass spectrum shows evidence for thef1(1285) meson with a mass of 1278±2 MeV and width 41±12 MeV which decays mainly through ρ0(770)π+π-. Thef1(1285) is also observed in the ηπ+π-channel. There is no significant evidence for ηππ or 4π decay modes of thef1(1420). The ρ0ρ0production is found to be small. A Dalitz plot analysis of the 3π system shows evidence fora2(1320) production and for a large contribution of theJPC=1++ρπ wave.

Published
1989
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27. A study of theKπ system in the reaction <img src="/fulltext-image.asp?format=htmlnonpaginated&src=L2177P1229127168_html\10052_2005_Article_BF01572538_TeX2GIFIE1.gif" border="0" alt=" $$K^ - p \to \bar K^0 \pi ^ - p$$ " /> at 8.25 GeV/c

Author

Baubillier, M., Bloodworth, I. J., Burns, A. J., Carney, J. N., Cox, G. F., Dore, U., Kinson, J. B., Knudson, K., Lévy, F., Negus, P. J., Oh, B. Y., Quercigh, E., Scarr, J. M., Smith, G. A., Baillie, O. Villalobos, Votruba, M. F., Whitmore, J., and Zitoun, R.

Abstract

The production ofK* resonances has been studied in the reaction " at 8.25 GeV/c. The data comes from a high statistics bubble chamber experiment (180 events/μb). Masses, widths and production cross-sections have been determined for the first threeK*'s. The contributions from natural and unnatural parity exchange have been obtained for theK*(890) and theK*(1420). A partial wave analysis of theK π system from threshold to 1.9 GeV provides evidence for a 0+ enhancement near 1.4 GeV which could be interpreted as the κ(1350).

Published
1984
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28. A partial wave analysis of thef′ region in the reaction <img src="/fulltext-image.asp?format=htmlnonpaginated&src=R627201001757638_html\10052_2005_Article_BF01571896_TeX2GIFIE1.gif" border="0" alt=" $$K^ - p \to K\bar K\Lambda ^0 $$ " /> at 8

Author

Baubillier, M., Bloodworth, I. J., Burns, A., Carney, J. N., Cox, G. F., Dore, U., Kinson, J. B., Knudson, K., Levy, F., Negus, P. J., Oh, B. Y., Quercigh, E., Scarr, J. M., Smith, G. A., Baillie, O. Villalobos, Votruba, M. F., Whitmore, J., and Zitoun, R.

Abstract

A partial wave analysis of theK " system produced by 8.25 GeV/cK− mesons in the reaction " has been performed, taking into account the information provided by the Λ0 decay. Thef′ region is dominated byD0(−) andD1(+) waves. We see no evidence for the production of new 0++ states in the mass region 1.05 to 1.75 GeV.

Published
1983
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29. Sunti delle comunicazioni presentate al XLVII Congresso della società

Author

Abate, E., Bellini, G., Fiorini, E., Ratti, S., Abbattista, N., Minafra, A., Mongelli, S., Romano, A., Waloschek, P., Ageno, M., Felici, C., Agodi, A., Giordano, R., Alitti, J., Alles-Borelli, V., Baton, J. P., Berthelot, A., Bidan, U., Daudin, A., Deler, B., Goussu, O., Jabiol, M. A., Lévy, F., Lewin, C., Neveu-René, M., Rogozinski, A., Shively, F., Laberrigue-Frolow, J., Ouannès, O., Sené, M., Vigneron, L., Abbattista, N., Mongelli, S., Romano, A., Benedetti, E., Litvak, J., Puppi, G., Waloschek, P., Whitehead, M., Allen, J. E., Bartoli, C., Brunelli, B., Nation, J. A., Rumi, B., Toschi, R., Boschi, A., Magistrelli, F., Allen, J. B., Coville, C., Martone, M. U., Segre, S. E., Amaldi, U., Cocconi, V. T., Fazzini, T., Fidecaro, G., Gesquière, C., Legros, M., Steiner, H., Andreassi, G., Budini, P., Calucci, G., Furlan, G., Peressutti, G., Cazzola, P., Archetti, I., Bocciarelli, D. Steve, Argan, P. E., Bendiscioli, G., Ciocchetti, G., Ferrero, I., Gigli, A., Piazzoli, A., Picasso, E., Piragino, G., Ascarelli, G., Rodriguez, S., Ascenzi, A., Bonucci, E., Bocciarelli, D. Steve, Ascenzi, A., François, C., Bocciarelli, D. Steve, Ascoli, A., Fuhrman, Z. A., Ascoli-Bartoli, U., De Angelis, A., Martellucci, S., Asdente, M., Friedel, J., Aubert, B., Brisson, V., Hennessy, J., Mittner, P., Six, J., Baglin, C., Bloch, M., Bressy, A., Hennessy, J., Lagarrigue, A., Mittner, P., Orkin-Lecourtois, A., Rançon, P., Rousset, A., Sauteron, X., Auer, P. L., Nation, J. A., Aurisicchio, S., Frontali, C., Graziosi, F., Aurisicchio, S., Frontali, C., Graziosi, F., Toschi, G., Bachelet, F., Balata, P., Lucci, N., Baldassarre, F., Caforio, A., Ferilli, A., Ferraro, D., Merlin, M., Semeraro, S., Fisher, C. M., Gibson, W. M., Mason, A., Venus, W., Evans, D., Hossain, A., Lock, W. O., Votruba, M. F., Wataghin, A., Kasim, M. M., Shaukat, M. A., Fedrighini, A., Herz, A. J., Sichirollo, A. E., Tallone, L., Vegni, G., Balzarotti, A., Chiarotti, G., Frova, A., Baracchi, F., Perilli-Fedeli, R., Pierucci, M., Saltini, G., Barbiellini, G., Bologna, G., Diambrini, G., Murtas, G. P., Barone, A., Frontali, C., Baroni, G., Bizzarri, R., Guidoni, P., Manfredini, A., Stajano, A., Brautti, G., Ceschia, M., Chersovani, L., Sessa, M., Amaldi, U., Fazzini, T., Fidecaro, G., Steiner, H., Bassetti, M., Pompei, A., Bassi, P., Bertolini, G., Cappellani, F., Ferretti, B., Restelli, G. B., Rota, A., Venturini, G., Baton, J. P., Battaglia, A., Iannuzzi, M., Polacco, E., Bellini, G., Antoni, G. Degli, Fiorini, E., Negri, P., Ratti, S., Bellini, G., Fiorini, E., Fretter, W. B., Herz, A. J., Hoang, T. F., Negri, P., Ratti, S., Baglin, C., Bingham, H., Drijard, D., Lagarrigue, A., Mittner, P., Orkin-Lecourtois, A., Rançon, P., Rousset, A., De Raad, B., Salmeron, R., Voss, R., Bellini, G., Fiorini, E., Herz, A. J., Negri, P., Ratti, S., Baglin, C., Bloch, M., Bingham, H., Drijard, D., Lagarrigue, A., Mittner, P., Orkin-Lecourtois, A., Rançon, P., Rousset, A., De Raad, B., Salmeron, R., Voss, R., Bellini, G., Fiorini, E., Herz, A. J., Negri, P., Ratti, S., Cresti, M., Limentani, S., Santangelo, R., Fretter, W. B., Hoang, T. F., Boreani, G., Perrero, I., Garelli, C. M., Baglin, C., Bingham, H., Drijard, D., Lagar-Rigue, A., Mittner, P., Orkin-Lecourtois, A., Rançon, P., Rousset, A., Bloch, M., De Raad, B., Salmeron, R., Voss, R., Beltrametti, E. G., Beltrami, M., Colombo, M., Fieschi, R., Berkelman, K., Cortellessa, G., Reale, A., Bernè, A., Boato, G., De Paz, M., Bertolotti, M., Grasso, V., Papa, T., Sette, D., Bertolotti, M., Sette, D., Bertoluzza, C., Bisi, A., Fasana, A., Gatti, E., Zappa, L., Bisi, A., Fasana, A., Zappa, L., Bisi, A., Fasana, A., Zappa, L., Boato, G., Casanova, G., Levi, A. C., Bonazzola, G., Borello, O. A., Costa, S., Ferroni, S., Bonera, G., Borsa, F., De Stefano, P., Rigamionti, A., Bonera, G., De Stefano, P., Rigamonti, A., Bordoni, P. G., Giua, P. E., Palmieri, L., Verani-Borgucci, M., Bordoni, P. G., Nuovo, M., Verdini, L., Bordoni, P. G., Nuovo, M., Verdini, L., Borello, O. A., Ferrero, F., Malvano, R., Molinari, A., Borgonovi, G., Caglioti, G., Ricci, F. P., Santoro, A., Scatturin, V., Bortolani, M. V., Lendinara, L., Monari, L., Braccesi, A., Ceccarelli, M., Budini, P., Weber, T., Buttino, G., Cecchetti, A., Drigo, A., Caglioti, G., Ricci, F. P., Caianiello, E. R., Caianiello, E. R., Marinaro, M., Caianiello, E. R., Preziosi, B., Caldirola, P., De Baebieri, O., Calvi, G., Parisi, R., Rubbino, A., Camagni, P., Chiarotti, G., Manara, A., Caimpolattaro, A., Marinaro, M., Campos Venuti, G., Matthiae, G., Canobbio, E., Cappelletti, R., Dalla Croce, L., Careri, G., Cunsolo, S., Mazzoldi, P., Carrara, N., Checcacci, P. F., Ronchi, L., Carrara, R., Cresti, M., Grigoletto, A., Loria, A., Peruzzo, L., Santangelo, R., Venchiarutti, D., Carrelli, A., Grossetti, E., Pauciulo, L., Carreli, A., Grossetti, E., Tartaglione, E., Carrelli, A., Grossetti, E., Brescia, G., Carrelli, A., Porreca, F., Cattaneo, F., Germagnoli, E., Cattaneo, F., Germagnoli, E., Cavaliere, A., Auer, P. L., Cavallaro, S., Potenza, R., Ricamo, R., Rubbino, A., Cavalleri, G., Gatti, E., Redaelli, G., Cavalleri, G., Giovanellt, R., Ceresara, S., Federigih, T., Cernigoi, C., Gabrielli, I., Iernetti, G., Villi, C., Chadwick, C. B., Davies, W. T., Derrick, M., Mulvey, J. H., Radojicic, D., Wilkinson, C. A., Cresti, M., Limentani, S., Loria, A., Santangelo, R., Chiarotti, G., Nardelli, G., Chiozzotto, A., Valente, F., Cocconi, V. T., Fazzini, T., Fidecaro, G., Legros, M., Lipman, N. H., Merrison, A. W., Colli, L., Bassani, G., Sona, P. G., Cristofori, F., Franceschetti, M. O., Colli, L., Iori, I., Bassani, G., Krzuk, G., Colli, L., Mangialajo, M., Marcelja, F., Merzari, F., Sona, P. G., Conforto, G., Conversi, M., Di Lella, L., Penso, G., Toller, M., Rubbia, C., Conforto, G., di Lella, L., Penso, G., Toller, M., Rubbia, C., Contursi, G., Pozzi, A., Cortellessa, G., Reale, A., Salvadori, P., Cortellessa, G., Reale, A., Salvadori, P., Costa, S., Crosignani, E., Franzosini, P., Siragusa, G., Zanotti, L., Cutolo, M., Cutolo, M., Cuzzocrea, P., Ricci, R. A., Vingiani, G. B., Da Prato, G., Debiasi, G. B., Rostagni, G., De Carvalho, H., Celano, A., Cortini, G., Del Giudice, E., Potenza, G., Rinzivillo, R., Ghigo, G., de Carvalho, H. G., Celano, A., Potenza, G., Rinzivillo, R., de Carvalho, H. G., Manfredini, A., Muchnik, M., Severi, M., Combe, J., Goebel, K., de Carvalho, H. G., Manfeedini, A., Muchnik, M., Severi, M., Goebel, K., Vanderhaeghe, G., de Carvalho, H. G., Manfredini, A., Muchnik, M., Severi, M., Bösch, R., Lang, J., Müller, R., Wölfli, W., de Carvaiho, H. G., Muchnik, M., de Carvalho, H. G., Salvetti, F., Ghigo, G., de Carvalho, H. G., Potenza, G., Rinzivillo, R., Sassi, E., Lock, W. O., Degli Antoni, G., Boella, G., Cantù, C., Herz, A. J., Della Valle, F., Frontali, L., Orlando, P., Tecce, G., Delli Santi, S., Mannino, G., Setti, G., Demanins, F., Pisent, G., Poiani, G., Villi, C., De Martini, F., Gatti, E., Desalvo, A., Gondi, P., Levi, F. A., Zignani, F., Desalvo, A., Gondi, P., Levi, F. A., Zignani, F., De Tollis, B., Verganelakis, A., Di Corato, M., Geisema, E. S., Minguzzi-Ranzi, A., Belltère, J., Bingham, H. H., Bloch, M., Drijard, D., Hennessy, J., Mittner, P., Orkin-Lecourtois, A., Garelli, M., Vigone, M., Ferrero, I., Grigoletto, A., Limentani, S., Loria, A., Waldner, P., Baglin, C., Bingham, H. H., Drijard, D., Lagarrigue, A., Mittner, P., Orkin-Lecourtois, A., Rançon, P., Rousset, A., de Raad, B., Salmeron, R., Voss, R., Emma, V., Milone, C., Rubbino, A., Iannelli, S., Mezzanares, F., Erra, E., Saetta Menichella, E., Facchini, U., Erdas, F., von Gehlen, G., Fabri, G., Germagnoli, E., Fabiani, F., Fidecaro, M., Finocchiaro, G., Giacomelli, G., Harting, D., Lipman, N. H., Torelli, G., Fidecaro, M., Finocchiaro, G., Gatti, G., Giacomelli, G., Middelkoop, W. C., Yamagata, T., Fidecaro, M., Finocchiaro, G., Giacomelli, G., Fieschi, R., Spinolo, G., Freindl, L., Niewodniczański, H., Nurzyński, J., Slapa, M., Strzalkowski, A., Frontali, L., Mangiantini, M. T., Tecce, G., Toschi, G., Galzenati, E., Pusterla, M., Gasparini, F., Gatti, E., Svelto, V., Tamburello, C., Gellt, D., Gelli, D., Federighi, T., Gondi, P., Grilli, A., Noblli, D., Greenlees, G. W., Grotowski, K. A., Robbins, A. B., Grimaldi, M., Hossain, A., Votruba, F. M., Wataghin, A., Evans, D., Iori, I., Principi, P., Rossini, T., Linhart, J. G., Knoepfel, H., Gourlan, C., Liotta, R. S., Luccio, A., Pavanati, G., Resmini, F., Rosatelli, C., Succi, C., Tagliaferri, G., Luccio, A., Pavanati, G., Resmimi, F., Succi, C., Tagliaferri, G., Luccio, A., Pavanati, G., Resmini, F., Succi, C., Tagliaferri, G., Maisonnier, Ch., Linhart, J. G., Haegi, M., Malvano, R., Molinari, A., Omini, M., Marcazzan, M. G., Merzari, F., Tonolini, F., Facchini, U., Martelli, G., Chapman, K., Galbraith, W., van der Raay, H. B., Reading, D. H., Rubinstein, R., Martelli, G., Chapman, K., van der Raay, H. B., Reading, D. H., Rubinstein, R., Marx, G., Milone, C., Missiroli, G., Valdrè, U., Missoni, G., Motz, J. W., Monti, D., Quareni, G., Quareni Vignudelli, A., Gottntein, K., Püschel, W., Tietge, J., Morchio, R., Borsellino, A., Notarrigo, S., Parisi, R., Ricamo, R., Rubbino, A., Paić, M., Antolković, B., Tomaš, P., Turk, M., Paoletti, A., Ricci, F. P., Pappalardo, G., Potenza, R., Ricamo, R., Vinciguerra, D., Pelosi, V., Picasso, E., Tomasini, G., Dascola, G., Gainotti, A., Lamborizio, C., Porreca, F., Pozzi, A., Pratesi, R., Ronchi, L., Scheggi, A. M., di Francia, G. Toraldo, Quercia, T. F., Turrisi, E., Ricci, R. A., Jean, M., Van Lieshout, R., Ricci, R. A., Vingiani, G. B., Monaro, S., Chilosi, G., Cuzzocrea, P., Van Lieshout, R., Van Nooyen, B., Sargentini, A., Sgarlata, F., Sette, D., Wanderlingh, F., Somon, J. P., Linhart, J. G., Knoepfel, H., Toschi, R., Valdrè, U., Verdini, L., Verdini, L., Verdini, L., Waldner, F., Zin, G., Demanins, F., and Vinci, F.

Published
1962
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30. An effective mass analysis in cosmic ray jets

Author

Sedlák, J., Šimák, V., and Votruba, M. F.

Abstract

The method of invariant mass spectra of groups of particles, known from the search for multiparticle resonant states in high energy physics, is applied to secondary particles in cosmic ray jets. The results are discussed in connection with the fire-ball model and the H-quanta model for the multiple production of particles in a very high energy region.

Published
1968
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31. Coherent production of pions by high-energy pions on complex nuclei

Author

Caforio, A., Ferraro, D., Semeraro, S., Fisher, C. M., Mason, A., Venus, W. A., Evans, D., Hossain, A., Votruba, M. F., Wataghin, A., Kasim, M. M., Shaukat, M. S., Herz, A. J., Sichirollo, A. E., and Vegni, G.

Abstract

A search was made in nuclear emulsion for examples of coherent multiple production of pions by diffraction dissociation and Coulomb dissociation. The primary particles were negative pions of 14, 16.2 and 17 GeV/c, and the total track length examined was 971.8 m. Events in which there were three fast charged secondaries and no evidence of disintegration or radioactive decay of the target nucleus were found to contain a large proportion of possible examples of coherent production. This conclusion could be reached without the use of measurements of the momenta of the secondaries. A more detailed analysis was carried out with the aid of the results of momentum determinations, and this led to an estimate of the mean free path of (51−11+18) metres of emulsion for the coherent reaction π−+nucleus→π−+π−+π++ nucleus. An analysis of the distributions of momentum transfer to the target nucleus, as well as a comparison with the results of the bubble-chamber work, provide strong indications that all the complex nuclei in the emulsion act as targets in this reaction, and the results are fully consistent with the hypothesis that diffraction dissociation is the dominant mechanism.

Published
1964
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38. Section 3 - Stress physiology

Author

Braunová, Z., Šiffel, P., Brázdovlčová, B., Dugovič, L., Mistrík, I., Zaichenko, A. M., Pavlovkin, J., Frič, F., Hudečkova, E., Janáček, J., KmeŤ, J., Macháčková, I., Haničova, A., Krekule, J., Ovečková, O., Šikulová, J., Vizárová, G., Hudák, J., Paulech, C., Ptáčková, M., Bystřická, A., Repka, V., Slováková, L., Slovák, M., Slováková, L., Vizárová, G., Votruba, M., Votrubová, O., Votrubová, O., Hlavatá, Z., Grospietsch, M., Zámečník, J., Janáček, J., Skládal, V., Bieblová, J., Čížkova, R., and Reinöhl, V.

Published
1992
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