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1. PRODUCTION OF NEUTRAL STRANGE PARTICLES IN MUON-NUCLEON SCATTERING AT 490 GEV

Author

H. J. Gebauer, J. F. Bartlett, M. Wilhelm, I. Derado, S. Krzywdzinski, H. E. Stier, Jan Figiel, S. Wolbers, W. Mohr, P. L. Anthony, S. Aïd, M. Erdmann, Jim Hanlon, S. Magill, M. D. Baker, Henry Lubatti, H. M. Braun, H. J. Seyerlein, S. K. Dhawan, Shuichi Kunori, G. A. Snow, M. Aderholz, D. E. Jaffe, D. Hantke, L.S. Osborne, K. Dziunikowska, S. O'Day, A. Manz, Michael Schmitt, G. Jancso, A. Röser, K. Kadija, F. M. Pipkin, A. Salvarani, U. Ecker, Mark Raymond Adams, S. Tentindo-Repond, D. McLeod, H. E. Jackson, D. G. Michael, R. L. Talaga, P. Malecki, Andris Skuja, J. J. Ryan, J. Wilkes, P. Stopa, Ronald Gilman, R. D. Kennedy, V. Eckardt, H. E. Montgomery, Norbert Schmitz, V. W. Hughes, C. W. Salgado, V. Papavassiliou, M. C. Green, D. F. Geesaman, T. Dreyer, H. J. Trost, Janet Conrad, Jorge G. Morfin, Wit Busza, H. Venkataramania, J. Haas, G. Coutrakon, C. Halliwell, S. Söldner-Rembold, Tiefu Zhao, S. B. Kaufman, A. A. Bhatti, K. Olkiewicz, R. B. Nickerson, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, J. J. Lord, W. Dougherty, D. M. Jansen, K. P. Schüler, E. J. Ramberg, T. Kirk, H. L. Melanson, B. Pawlik, Richard Wilson, R. Davisson, W. Wittek, and H. G. E. Kobrak

Subjects
Quantum chromodynamics, Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Multiplicity (mathematics), Elementary particle, Strangeness, Lambda, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous)
Abstract

The production of K0, Λ and {Mathematical expression} particles is studied in the E665 muon-nucleon experiment at Fermilab. The average multiplicities and squared transverse momenta are measured as a function of xF and W2. Most features of the data can be well described by the Lund model. Within this model, the data on the K0/π± ratios and on the average K0 multiplicity in the forward region favor a strangeness suppression factor s/u in the fragmentation process near 0.20. Clear evidence for QCD effects is seen in the average squared transverse momentum of K0 and Λ particles. © 1994 Springer-Verlag.

Published
2016

2. DENSITY AND CORRELATION INTEGRALS IN DEEP-INELASTIC MUON-NUCLEON SCATTERING AT 490 GEV

Author

M. Wilhelm, G. A. Snow, D. E. Jaffe, R. Davisson, S. Aïd, F. M. Pipkin, H. E. Stier, Richard Wilson, W. Dougherty, H. Venkataramania, Norbert Schmitz, W. Wittek, Henry Lubatti, A. Manz, R. L. Talaga, S. O'Day, K. Kadija, Wit Busza, H. G. E. Kobrak, Shuichi Kunori, K. Dziunikowska, L.S. Osborne, K. Olkiewicz, D. G. Michael, Andris Skuja, M. R. Adams, Pa. Malecki, J. Wilkes, H. J. Gebauer, R. B. Nickerson, R. D. Kennedy, J. F. Bartlett, B. Pawlik, I. Derado, V. Eckardt, D. F. Geesaman, A. Salvarani, H. E. Montgomery, E. J. Ramberg, Martin Erdmann, U. Ecker, Jorge G. Morfin, M. C. Green, W. Mohr, Janet Conrad, J. J. Lord, V. Papavassiliou, H. J. Trost, S. Krzywdzinski, A. A. Bhatti, D. McLeod, G. Jancso, Michael Schmitt, Satish Dhawan, C. Halliwell, S. Tentindo-Repond, H. L. Melanson, Jan Figiel, D. M. Jansen, A. Röser, Ronald Gilman, H. E. Jackson, Jim Hanlon, V. W. Hughes, H. M. Braun, S. Wolbers, S. Magill, C. W. Salgado, P. Stopa, J. J. Ryan, M. D. Baker, K. P. Schüler, D. Hantke, F. Botterweck, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, T. Kirk, H. J. Seyerlein, T. Dreyer, J. Haas, P.L. Anthony, G. Coutrakon, S. Söldner-Rembold, Tiefu Zhao, and S. B. Kaufman

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Scattering, Hadron, Tevatron, Deep inelastic scattering, law.invention, Nuclear physics, law, Intermittency, High Energy Physics::Experiment, Fermilab, Nucleon
Abstract

Results on density integrals Fq(Q2) and correlation integrals Kq(Q2) are presented for the first time in muon-nucleon scattering at ∼ 490 GeV, using data from the E665 experiment at the Tevatron of Fermilab. A clear rise of the Fq integrals with decreasing size of the phase-space cells (“intermittency”) is observed for pairs and triplets of negative hadrons whereas the effect is much weaker for mixed charge combinations. From these findings it is concluded that the observed intermittency signal is mainly caused by Bose-Einstein interference. Furthermore, no energy (W) dependence of F2(Q2) is observed within the W range of the E665 experiment. Finally, the third-order correlation integrals K3(Q2) are found to be significantly different from zero which implies the presence of genuine three-particle correlations in muon-nucleon interactions.

Published
2016

3. Diffractive production of rho(0)(770) mesons in muon-proton interactions at 470 GeV

Author

P. L. Anthony, Janet Conrad, H. E. Jackson, Timothy J. Carroll, D. McLeod, W. Wittek, C. W. Salgado, J. Novak, U. Ecker, H. L. Clark, J. J. Ryan, H. G. E. Kobrak, B. Pawlik, G. Jancso, Tiefu Zhao, S. Kaufmann, R. B. Nickerson, B. Baller, P. Stopa, R. D. Kennedy, U. Bratzler, M. D. Baker, R. A. Swanson, R. S. Guo, Martin Erdmann, M. Aderholz, A. Röser, A. Zghiche, A. Banerjee, H. Schellman, D. Hantke, K. Hicks, P. Spentzouris, I. Derado, P. Madden, F. M. Pipkin, S. Aïd, A. Manz, R. Otten, R. W. Finlay, G. Siegert, S. Magill, K. Kadija, G. A. Snow, S. Söldner-Rembold, D. M. Jansen, Andris Skuja, F. S. Dietrich, M. Wilhelm, T. Dreyer, K. P. Schüler, D. G. Michael, K. Olkiewicz, Mark Raymond Adams, G. P. Zeller, V. Papavassiliou, V. Eckardt, J. Haas, H. E. Montgomery, G. Y. Fang, Henry Lubatti, A. A. Bhatti, D. E. Jaffe, Z. Jin, Jorge G. Morfin, Jan Figiel, C. Halliwell, Shuichi Kunori, R. Davisson, S. Wolbers, H. M. Braun, W. Dougherty, Richard Wilson, L.S. Osborne, K. A. Griffioen, D. F. Geesaman, H. Venkataramania, E. R. Kinney, J. J. Lord, D. A. Averill, H. J. Gebauer, D. H. Potterveld, Michael Schmitt, Norbert Schmitz, A. V. Kotwal, and H. L. Melanson

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Meson, Proton, Extrapolation, Virtual particle, Helicity, Nuclear physics, Mass spectrum, High Energy Physics::Experiment, Fermilab, Nuclear Experiment
Abstract

The diffractive production of ρ0(770 @#@) mesons in muon-proton interactions is studied in the kinematic region 0.15 GeV2 < Q2 < 20 GeV2 and 20 GeV < ? < 420 GeV. The data were obtained in the Fermilab fixed-target experiment E665 with primary muons of 470 GeV energy. Results are presented on the Q2, x and ? dependence of the cross section, on the shape of the ρ+ρt - mass spectrum, on the slope of the diffraction peak and on the production and decay angular distributions of the ρ0(770). The cross section for diffractive production of ρ0 by virtual photons on protons depends mainly on Q2. At fixed Q2, no significant dependence on x or ? is observed. The extrapolation to Q2 = 0 yields a photoproduction cross section of (10.30 ± 0.33) μb. The slope of the t′ distribution has a value of (7.0 ± 0.2) GeV−2, with a tendency to decrease as Q2 increases. The production and decay angular distributions of the ρ0 depend strongly on Q2 and are consistent with s-channel helicity conservation. The ratio R = σ l /σ t deduced from the decay angular distributions rises strongly with Q2, passing the value of 1 at Q2 ≈ 2 GeV2.

Published
2016

4. NUCLEAR SHADOWING, DIFFRACTIVE SCATTERING AND LOW MOMENTUM PROTONS IN MU-XE INTERACTIONS AT 490-GEV

Author

H. E. Stier, F. M. Pipkin, G. Coutrakon, Jim Hanlon, H. M. Braun, K. Kadija, K. Olkiewicz, A. Salvarani, Henry Lubatti, D. G. Michael, G. Jancso, P. Malecki, M. Wilhelm, S. Krzywdzinski, W. Wittek, A. Eskreys, M. Erdmann, H. G. E. Kobrak, Andris Skuja, R. A. Swanson, P. L. Anthony, P. H. Steinberg, T. Dreyer, Jan Figiel, S. Aïd, S. Wolbers, V. W. Hughes, J. F. Bartlett, C. Halliwell, M. C. Green, H. J. Trost, I. Derado, L.S. Osborne, P. Stopa, U. Ecker, M. D. Baker, C. W. Salgado, R. D. Kennedy, W. Mohr, J. Haas, B. Pawlik, D. Hantke, R. B. Nickerson, Shuichi Kunori, S. Söldner-Rembold, D. E. Jaffe, Mark Raymond Adams, Ronald Gilman, H. J. Seyerlein, Tiefu Zhao, V. Eckardt, R. L. Talaga, S. O'Day, D. F. Geesaman, H. E. Montgomery, S. Magill, T. Kirk, H. Schellman, S. B. Kaufman, H. E. Jackson, Janet Conrad, V. Papavassiliou, R. Davisson, Timothy J. Carroll, H. L. Melanson, E. J. Ramberg, Jorge G. Morfin, D. M. Jansen, S. K. Dhawan, M. Aderholz, A. Röser, J. Wilkes, A. A. Bhatti, H. Venkataramania, J. J. Ryan, K. P. Schüler, Richard Wilson, A. Manz, K. Dziunikowska, D. McLeod, G. A. Snow, Michael Schmitt, S. Tentindo-Repond, J. J. Lord, W. Dougherty, H. J. Gebauer, Norbert Schmitz, and Wit Busza

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Spectrometer, Scattering, Hadron, Tevatron, Elementary particle, Nuclear physics, Particle acceleration, Rapidity, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Engineering (miscellaneous)
Abstract

The production of charged hadrons is studied in μXe and μD interactions at 490 GeV beam energy. The data were taken at the Tevatron at Fermilab with the E665 spectrometer, equipped with a streamer chamber as vertex detector. Differences between the μXe and μD data are explained by cascading of hadrons in the Xe nucleus. The average multiplicity of charged hadrons in μXe scattering is compared to previously published pXe scattering data and is found to be strongly reduced. This is traced back to the low number of ‘projectile’ collisions in μXe interactions. From a study of thex Bj dependence of hadron production in μXe scattering, and by considering events with a large rapidity gap, evidence is found for a significant contribution of diffractive scattering, which is enhanced in the kinematic region where shadowing of the cross section is observed. This result supports recent models in which diffractive scattering and nuclear shadowing are closely related.

Published
2016

5. Observations of High-energy Cosmic-ray Electrons and Atmospheric Gamma rays with Emulsion Chambers

Author

J., J. Lord, J., Wilkes, Kobayashi, Tadashi, Komori, Yoshiko, Yoshida, Kenji, Sirai, Tatsuya, Tateyama, Nobuhito, Taira, Toshio, Aizu, Hideko, Fujii, masami, Yuda, Toshinori, Yamagami, Takamasa, Nishimura, Jun, Lord, J. J., and Wilkes, J

Abstract

宇宙線中の高エネルギー電子のエマルションチャンバーによる観測は１９６８年から１９９８年にわたって１３回にわたる気球観測が行われてきた．結果はそれぞれの時点で国際学会等に報告してきたが，ここではこれらを総括して報告することとした．観測の全有効露出量は SΩT＝6.65x10＾5m＾2・s・sr（～7.7m＾2・day・sr） であり，これまで行われた電子観測としては最大の量である．その結果，30GeV付近から３TeVにわたるエネルギースペクルとして Je(E) = (1.42+/-0.26)x10＾-4(100GeV/E)＾3.26+/-0.11/m＾2・s・sr・GeV が得られた．この結果は我々がすでに発表した結果 （Nishimura et al.1980， 以後文献1と呼ぶ）と良く一致している．電子と同時に大気中で発生するガンマ線についても詳しく観測を行い，4g/cm＾2の高度に規格化したエネルギースペクトルとして３０GeVから１０TeVの範囲で Jg(W)=(1.11+/-0.13) x 10^-4(100GeV/W)^2.74+/-0.06/m^2・s・sr・GeV が得られた．ガンマ線の観測は電子の大気効果補正に重要であると同時に，一次宇宙線の絶対強度の推定に重要であり，このガンマ線強度から１００GeV以上の一次陽子の強度を導き出す事が出来る．この論文では観測器としてのエマルションチャンバーが他の観測器と比べて電子観測にすぐれた特性を持っている事，エネルギー決定精度，電子の同定，陽子に対するrejection power，大気補正，ガンマ線スペクトルおよび一次陽子スペクトルの導出等についてやや詳しく述べた．最後にこれらの観測の結果から電子観測の重要性とその加速源について得られた知見について述べた．, The observations of electron spectrum bring us unique information about the sources and propagation of cosmic rays. Although the observational importance of the spectrum at high-energy side has been pointed out, the Emulsion Chamber experiments were the only one which observed the electron spectrum up to TeV region. Successive experiments of cosmic-ray electrons using emulsion chambers since 1977 have yielded about 10 times exposures in total as large as those of our previous experiments (Nishimura. J. et al, 1980). Our total exposure is now about 6.6x10^5m^2・s・sr, including those before 1977, which is one or two order magnitude larger than those of other experiments. This enabled us for the first time to observe the electron spectrum in TeV region. We present here the electron spectrum in the energy range 30GeV to 3TeV at the top of the atmosphere, which is expressed as : Je(E) = (1.42+/-0.26) x 10^-4(100GeV/E)^3.26+/-0.11/m^2・s・sr・GeV. This is essentially the same as our previous results in the low energy side. We also present the atmospheric gamma-ray spectrum at the balloon altitude that was obtained in the course of the data analysis of electrons. The gamma-ray spectrum normalized at 4g/cm^2 altitude is well represented by a single power law spectrum : Jg(W)=(1.11+/-0.13) x 10^-4(100GeV/W)^2.74+/-0.06/m^2・s・sr・GeV, in the range of 30GeV to 10TeV. We can deduce the flux of primary protons in the energy range of 300GeV to 50TeV from this gamma ray data, if we assume a certain model of hadronic interactions. Base on these data, we discussed the origin and propagation of the observed electrons in terms of the diffusion model, and possible spectral fluctuations in the TeV region due to the contribution of a small number of nearby sources., 資料番号: SA0200100000

Published
2002

6. Multifractal analysis of particles produced in 197 Au, 32 S and 16 O induced interactions at high energies

Author

S.Z. Nasyrov, K. Söderström, A.K. Musaeva, Joakim Nystrand, D. C. Zhou, Andrei Gheata, J. J. Lord, A. M. Bakich, C.B. Yang, Vivek K. Gupta, S.A. Krasnov, J. Grote, L. N. Svechnikova, M. Roeper, Shiv K. Gupta, D. Skelding, J. T. Rhee, S. Lokanathan, I. Otterlund, S.Q. Feng, M. Tothova, C.G. Lee, R. Sethi, E. R. Ganssauge, S. I. Zhokhova, Dong-Hai Zhang, S. Dhamija, V.I. Skorobogatova, M. I. Tretyakova, V. A. Plyushchev, S. Vokal, V. Bradnova, K. G. Gulamov, V. Kumar, Y.X. Li, Paul Nilsson, P. Y. Zheng, D.M. Seliverstov, V. S. Bhatia, Z.R. Hu, L. S. Liu, V. G. Larionova, A. S. Gaitinov, A. Pavukova, B. B. Simonov, G.M. Chen, S. B. Luo, M. Karabova, U.I. Tuleeva, L. Liang, X. Cai, Madan M. Aggarwal, M. I. Adamovich, H. Q. Wang, W. Y. Qian, L.Z. Yu, Y. Lu, N. A. Salmanova, Y.L. Yu, F. A. Avetyan, F. G. Lepekhin, G. I. Orlova, Y. C. Kim, Shi-kun Wang, Janka Vrlakova, Maria Haiduc, Rashmi Raniwala, V. S. Navotny, A.M. Tawfik, Evert Anders Stenlund, O. V. Levitskaya, N. A. Marutyan, K. El Chenawi, A.M. Seitimbetov, S. K. Badyal, Z.G. Liu, K. B. Bhalla, N. K. Rao, Anju Bhasin, R. Amirikas, T. Wu, N. Saidkhanov, L. G. Sarkisova, Z. Q. Weng, V. I. Bubnov, S. P. Kharlamov, V. G. Bogdanov, Y.M. Qin, D. Felea, N. S. Lukicheva, V. V. Rusakova, Z.B. Yin, V. Vashisht, Alexander Kovalenko, T. P. Trofimova, S. Garpman, X.R. Wang, N. P. Andreeva, S. G. Gerassimov, N. G. Peresadko, E. S. Basova, I. S. Mittra, L. Just, Mihaela Gheata, C.I. Shakhova, L.S. Peak, E. K. Kanygina, Bo Jakobsson, V. R. Sarkisyan, M. M. Chernyavski, N. V. Petrov, L. P. Chernova, D. Hasegan, H. Liu, I. Y. Chasnikov, Y. A. Alexandrov, R. J. Wilkes, L. K. Mangotra, B. Singh, and W. Li

Subjects
Physics, Spectral representation, Fractal, Monte Carlo method, General Physics and Astronomy, Statistical analysis, Rapidity, Multifractal spectra, Multifractal system, Atomic physics, Statistical fluctuations, Molecular physics
Abstract

We analyse the multifractal structure of moments Gq in terms of a new variable X on data of 197Au, 32S and 16O induced interactions with emulsion nuclei and Monte Carlo generated samples. The dynamical properties of the produced particles are mapped onto multifractal spectra. We compare ln G in experimental data of 197Au, 32S and 16O with pure statistical fluctuations. It is shown that the stochasticity plays an important role for the G-moments.

Published
1998

7. Cosmic‐Ray Proton and Helium Spectra: Results from the JACEE Experiment

Author

B. S. Nilsen, E. D. Olson, S. Dake, K. Asakimori, H. Yokomi, K. H. Moon, J. H. Derrickson, K. Chevli, T. H. Burnett, R. Holynski, H. Oda, F. E. Roberts, M. Kobayashi, E. Zager, J. Iwai, Osamu Miyamura, Michael Cherry, J. J. Lord, Takayoshi Hayashi, John C. Gregory, W. F. Fountain, T. Tominaga, K. Sengupta, Henryk Wilczyński, T. Shiina, Thomas A. Parnell, W. Wolter, M. Fuki, M. J. Christ, B. Wilczynska, T. Sugitate, A. Iyono, John W. Watts, J. Johnson, J. P. Wefel, S. C. Strausz, T. Ogata, R. J. Wilkes, and Yoshiyuki Takahashi

Subjects
Physics, Range (particle radiation), Proton, Hydrogen, chemistry.chemical_element, Astronomy and Astrophysics, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, Spectral line, Supernova, chemistry, Space and Planetary Science, Astrophysics::Galaxy Astrophysics, Helium
Abstract

Measurements of the cosmic-ray hydrogen and helium spectra at energies from 20 to 800 TeV are presented. The experiments were performed on a series of twelve balloon flights, including several long duration Australia to South America and Antarctic circumpolar flights. No clear evidence is seen for a spectral break. Both the hydrogen and the helium spectra are consistent with power laws over the entire energy range, with integral spectral indices 1.80 ± 0.04 and 1.68 -->+ 0.04−0.06 for the protons and helium, respectively. The results are fully consistent with expectations based on supernova shock acceleration coupled with a leaky box model of propagation through the Galaxy.

Published
1998

8. Critical behaviour in Au fragmentation at 10.7A GeV

Author

K. Söderström, P. Y. Zheng, L. K. Mangotra, K. G. Gulamov, R. Sethi, V. I. Bubnov, V. A. Plyushchev, S. Vokal, V. Kumar, Y.X. Li, Madan M. Aggarwal, V. S. Navotny, G.M. Chen, Joakim Nystrand, L. N. Svechnikova, L. P. Chernova, A.K. Musaeva, N. A. Salmanova, V. S. Bhatia, Anju Bhasin, N. Saidkhanov, C.I. Shakhova, L. S. Liu, V. G. Larionova, D. Skelding, J. T. Rhee, M. Tothova, E. R. Ganssauge, V. V. Rusakova, I. Y. Chasnikov, L. G. Sarkisova, C.B. Yang, Z. Q. Weng, Y. A. Alexandrov, Bo Jakobsson, Rashmi Raniwala, L. Karlsson, L.S. Peak, R. J. Wilkes, J. J. Lord, S.A. Krasnov, I. Manhas, V. R. Sarkisyan, J. Grote, N.A. Tawfik, Dong-Hai Zhang, M. I. Tretyakova, S.Z. Nasyrov, N. G. Peresadko, E. S. Basova, A.M. Seitimbetov, N. K. Rao, Janka Vrlakova, D. C. Zhou, A. S. Gaitinov, X. Cai, U.I. Tuleeva, F. A. Avetyan, A. M. Bakich, M. Roeper, Maria Haiduc, M. Karabova, M. M. Chernyavski, L. Just, H. Q. Wang, E. K. Kanygina, S. Garpman, M. I. Adamovich, X.R. Wang, W. Y. Qian, S. K. Badyal, Z.G. Liu, S. I. Zhokhova, Alexander Kovalenko, B. Singh, N. P. Andreeva, S. B. Luo, S. P. Kharlamov, T. P. Trofimova, Shi-kun Wang, V. G. Bogdanov, U. Henjes, S. G. Gerassimov, Y.M. Qin, N. S. Lukicheva, G. I. Orlova, Vivek K. Gupta, Shiv K. Gupta, K. B. Bhalla, S. Dhamija, R. Amirikas, Evert Anders Stenlund, N. A. Marutyan, S. Lokanathan, Y. Lu, V. Bradnova, and I. Otterlund

Subjects
Physics, Nuclear and High Energy Physics, Phase transition, education.field_of_study, Hadron, Population, Charge density, Supercritical fluid, Nuclear physics, Fragmentation (mass spectrometry), Nuclear fusion, Nuclear emulsion, Nuclear Experiment, education
Abstract

The complete charge distribution of products from Au nuclei fragmenting in nuclear emulsion at 10.7A GeV has been measured. Multiplicities of produced particles and particles associated with the target source are used to select peripheral and central events. A statistical analysis, based on event-by-event charge distributions, show that a population of subcritical, critical and supercritical events, i.e. a phase transition like behaviour, is observed among peripheral collisions.

Published
1998

9. Nuclear effect in higher-dimensional factorial moment analysis of the $^{16}$ O-, $^{32}$ S- and $^{197}$ Au-Em interaction data at 200, 60 and 11 A GeV/c

Author

Madan M. Aggarwal, G. F. Xu, R. J. Wilkes, L. Liang, N. A. Salmanova, V. S. Navotny, O. V. Levitskaya, K. Söderström, D. Hasegan, K. El Chenawi, I. S. Mittra, Anju Bhasin, Mihaela Gheata, A. Pavukova, N. Saidkhanov, C.I. Shakhova, R. Sethi, S. B. Luo, V. A. Plyushchev, J. J. Lord, S. Vokal, J. Grote, S. K. Gupta, Y.X. Li, L.S. Peak, Joakim Nystrand, F.A. Avetian, A. S. Gaitinov, Z. Q. Weng, N. V. Petrov, L. Just, K. G. Gulamov, M. Tothova, V. Kumar, S. Garpman, Z.R. Hu, V. S. Bhatia, L. S. Liu, V. G. Larionova, A.M. Tawfik, M. Karabova, H. Q. Wang, S.Q. Feng, C.G. Lee, K. B. Bhalla, R. Amirikas, Y. Lu, Vivek K. Gupta, L. N. Svechnikova, W. Y. Qian, V. Bradnova, X.R. Wang, S. P. Kharlamov, E. K. Kanygina, Rashmi Raniwala, L.Z. Yu, L. P. Chernova, Paul Nilsson, V. Vashisht, V. G. Bogdanov, Maria Haiduc, U.I. Tuleeva, N. P. Andreeva, V.I. Skorobogatova, F. G. Lepekhin, Y.M. Qin, D. Felea, I. Otterlund, M. Roeper, A.M. Seitimbetov, G.M. Chen, V.R. Sarkisian, Alexander Kovalenko, Bo Jakobsson, Y. C. Kim, N. S. Lukicheva, N. K. Rao, M. I. Tretyakova, D.M. Seliverstov, V. I. Bubnov, T. P. Trofimova, S.G. Gerasimov, Y. Deng, Dong-Hai Zhang, P. Y. Zheng, V. V. Rusakova, Z.B. Yin, N. G. Peresadko, E. S. Basova, X. Cai, I. Y. Chasnikov, Y. A. Alexandrov, G. I. Orlova, L. G. Sarkisova, Janka Vrlakova, A.K. Musaeva, S. K. Badyal, Z.G. Liu, C.B. Yang, S. A. Krasnov, E. Stenlund, Bhartendu K. Singh, B. B. Simonov, S.Z. Nasyrov, L. K. Mangotra, D. Skelding, J. T. Rhee, S. I. Zhokhova, Y.L. Yu, S. Lokanathan, D. C. Zhou, Andrei Gheata, A. M. Bakich, E. R. Ganssauge, M. I. Adamovich, Shi-kun Wang, N.A. Marutian, S. Dhamija, and M. M. Chernyavsky

Subjects
Nuclear physics, Physics, Moment (mathematics), Particle physics, Angular distribution, Physics and Astronomy (miscellaneous), Nuclear Theory, Emulsion, Rapidity, Nuclear Experiment, Particle Physics - Phenomenology, Factorial moment
Abstract

The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ^{16}O-, ^{32}S- and ^{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ^{16}O-, ^{32}S- and ^{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions.

Published
1997

10. Inclusive single-particle distributions and transverse momenta of forward produced charged hadrons in $\mu p$ scattering at 470 GeV

Author

R. S. Guo, S. Aïd, P. Stopa, R. D. Kennedy, A. Zghiche, Z. Jin, G. A. Snow, S. Söldner-Rembold, I. Derado, A. Manz, Janet Conrad, H. L. Melanson, H. M. Braun, Andris Skuja, M. Aderholz, H. E. Jackson, Roger W. Finlay, Timothy J. Carroll, E. R. Kinney, J. J. Lord, F. M. Pipkin, D. G. Michael, M. D. Baker, B. Baller, A. Röser, V. Eckardt, H. E. Montgomery, Richard Wilson, D. A. Averill, D. Hantke, W. Wittek, K. Hicks, Jorge G. Morfin, J. Novak, F. S. Dietrich, H. G. E. Kobrak, D. McLeod, H. Venkataramania, V. Papavassiliou, W. Dougherty, K. A. Griffioen, G. Siegert, G. Jancso, P. Spentzouris, A. Banerjee, S. Magill, Michael Schmitt, D. H. Potterveld, B. Pawlik, S. Kaufmann, L.S. Osborne, H. J. Gebauer, M. Wilhelm, D. E. Jaffe, M. R. Adams, Shuichi Kunori, R. Davisson, K. P. Schüler, A. V. Kotwal, C. Halliwell, U. Ecker, U. Bratzler, N. Schmitz, R. A. Swanson, H. Schellman, A. A. Bhatti, H. L. Clark, J. J. Ryan, D. F. Geesaman, S. Wolbers, K. Olkiewicz, C. W. Salgado, Jan Figiel, Tiefu Zhao, R. B. Nickerson, R. Otten, T. Dreyer, J. Haas, P.L. Anthony, Martin Erdmann, G. Y. Fang, P. Madden, D. M. Jansen, J. Seyerlein, and Henry Lubatti

Subjects
Physics, Diffraction, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Momentum transfer, Hadron, Nuclear physics, Transverse plane, symbols.namesake, symbols, Feynman diagram, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Particle Physics - Experiment
Abstract

Using data from the Fermilab fixed target experiment E665, general properties of forward produced charged hadrons in μp interactions at a primary muon energy of 470 GeV are investigated. The normalized inclusive single-particle distributions for Feynman-x D(xF) and for the transverse momentum D(pt2, xF) are measured as a function of W and Q2. The dependence of the average transverse momentum squared 〈pt2〉 on xF, W and Q2 is studied. The increasing contribution from diffractive production as Q2 decreases leads to a reduction of the average charged hadron multiplicities at low (positive) xF and an enhancement at large xF, for Q2 ≲ 10 GeV2. It also reduces 〈pt2〉 for Q2 ≲ 5 GeV2 and 0.4 ≲ xF < 1.0. © Springer-Verlag 1997.

Published
1997

11. Multifragmentation of Gold nuclei in the interactions with photoemulsion nuclei at 10.7 GeV/nucleon

Author

L. N. Svechnikova, M. Karabova, H. Q. Wang, W. Y. Qian, A.M. Tawfik, Madan M. Aggarwal, L.Z. Yu, V. S. Navotny, K. El Chenawi, Rashmi Raniwala, R. Sethi, L.S. Peak, K. G. Gulamov, V. Kumar, M. I. Tretyakova, M. Gheata, K. Söderström, S.Z. Nasyrov, L. K. Mangotra, Y.X. Li, E. Baklitskaya, A. Gheata, N. G. Peresadko, E. S. Basova, G. Z. Eligbaeva, X. Cai, D. C. Zhou, L. Just, S.Q. Feng, Anju Bhasin, N. Saidkhanov, A. M. Bakich, Bhartendu K. Singh, T. I. Shakhova, M. Roeper, I.Ya. Chasnikov, M. I. Adamovich, G.M. Chen, D. Felea, Joakim Nystrand, S. Dhamija, Dong-Hai Zhang, Z. Q. Weng, N. A. Salmanova, V.R. Sarkisian, D. Skelding, Yu.A. Aleksandrov, M. M. Chernyavsky, Shi-kun Wang, X.R. Wang, J. T. Rhee, M. Haiduc, V. A. Plyushchev, S. Vokal, S. P. Kharlamov, V. G. Bogdanov, U. Henjes, Z.V. Anzon, V.V. Uzhinsky, N. P. Andreeva, Y.M. Qin, K. B. Bhalla, V. S. Bhatia, L. S. Liu, V. G. Larionova, U.I. Tuleeva, R. Amirikas, E. R. Ganssauge, N. S. Lukicheva, N.A. Marutian, T. Svensson, N. V. Maslennikova, S. I. Zhokhova, A.M. Seitimbetov, N. K. Rao, V. Vashisht, S. K. Gupta, Y. Lu, A.Y. Mashkov, E. K. Kanygina, L. E. Eremenko, L. G. Sarkisova, F.A. Avetian, B.P. Tursunov, G. S. Kalyachkina, E. Stenlund, G. I. Orlova, Bo Jakobsson, I. Manhas, I. Otterlund, Alexander Kovalenko, M. Tothova, S.G. Gerasimov, N. V. Petrov, S. Garpman, T. P. Trofimova, Vivek K. Gupta, A. S. Gaitinov, V. I. Bubnov, Janka Vrlakova, A.K. Musaeva, D. Hasegan, V. V. Rusakova, Z.B. Yin, R. J. Wilkes, P. Y. Zheng, I. S. Mittra, S. Lokanathan, J. J. Lord, S. B. Luo, J. Grote, C.B. Yang, S. A. Krasnov, L. P. Chernova, V. Bradnova, S. K. Badyal, and Z.G. Liu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Charge density, Statistical model, Nuclear physics, Transverse momentum, Radial flow, Multiplicity (chemistry), Nuclear Experiment, Nucleon, Glauber, Excitation
Abstract

Recent results from the EMU-01/12 collaboration are presented for 10.7 GeV/nucleon gold nuclei interactions in emulsion. The distributions of "bound" charge ( Zbound ,Z b3), multiplicity distributions, fragment correlations and fluctua- tions are discussed. The data are compared to similar results obtained on the ALADIN setup at 600 MeV/nucleon. It is shown that multifragmentation of gold nuclei at high and in- termediate energies has common features. It is also obtained that the IMFs have reduced multiplicity at high energies. The data are analyzed within the scope of the statistical model of multifragmentation. This model requires the fol- lowing predetermined model ingredients: mass, charge and excitation energy of nuclear residuals. The simple estimation method of these characteristics is proposed in the framework of the Glauber approach. It is shown that the multifragmentation model reproduces qualitatively the present data. A dramatic discrepancy between the predicted and experimental yield of two charged fragments is found. The evolution of transverse momentum of fragments as a function of Zbound is presented. It is shown that the model greatly underpredicts the transverse momentum of fragments. It is interpreted as evidence of a strong radial flow of spectator fragments.

Published
1997

12. Complex analysis of gold interactions with photoemulsion nuclei at 10.7 GeV/nucleon within the framework of cascade and FRITIOF models

Author

L. Just, N. G. Peresadko, E. S. Basova, E. Stenlund, T. H. Burnett, V. Bradnova, L. N. Svechnikova, N. A. Marutyan, A.Y. Mashkov, M. Ochs, Rashmi Raniwala, Alexander Kovalenko, T. P. Trofimova, N. S. Lukicheva, M. I. Tretyakova, M. Roeper, E. K. Kanygina, L. P. Chernova, K. Söderström, V. V. Uzhinskii, U.I. Tuleeva, A.M. Seitimbetov, E. R. Ganssauge, M. Karabova, Dong-Hai Zhang, S.Z. Nasyrov, L. K. Mangotra, N. K. Rao, I. S. Mittra, C.I. Shakhova, H. Q. Wang, R. J. Wilkes, K. G. Gulamov, V. Kumar, I. Y. Chasnikov, L.S. Peak, N. A. Salmanova, W. Y. Qian, Y. L. Xia, G. Z. Eligbaeva, Y. A. Alexandrov, N. V. Petrov, S. Garpman, X. Cai, Vivek K. Gupta, S. Dhamija, L. E. Eremenko, Joakim Nystrand, Madan M. Aggarwal, S. Lokanathan, Bo Jakobsson, M. Tothova, F. A. Avetyan, G. S. Kalyachkina, M. M. Chernyavski, Sudhir Raniwala, N. P. Andreeva, D. C. Zhou, V. R. Sarkisyan, S. Kachroo, C. Graf, S. G. Gerassimov, V. S. Navotny, A. M. Bakich, S. P. Kharlamov, A. S. Gaitinov, S. B. Luo, S. K. Gupta, G.S. Shabratova, V. G. Bogdanov, Z.V. Anzon, K. B. Bhalla, Y.M. Qin, M. I. Adamovich, D. Skelding, Anju Bhasin, N. Saidkhanov, B.P. Tursunov, Z. Q. Weng, R. Amirikas, E. Baklitskaya, S. Mokerjee, G. I. Orlova, J. J. Lord, L. G. Sarkisova, J. Grote, N. V. Maslennikova, V. I. Bubnov, S. I. Zhokhova, V. V. Rusakova, S. K. Badyal, Y. D. Li, C.B. Yang, S. A. Krasnov, S. Kitroo, Janka Vrlakova, I. Otterlund, V. A. Plyushchev, S. Vokal, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, and P. Y. Zheng

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Cascade, Nucleon
Published
1997

13. Charged particle multiplicities, densities and fluctuations in Pb+Pb interactions at 158 A GeV

Author

S. I. Zhokhova, R. J. Wilkes, S.Z. Nasyrov, Y.L. Yu, B. B. Simonov, M. Karabova, D. Hasegan, H. Q. Wang, A.M. Tawfik, R. Sethi, F. G. Lepekhin, L. P. Chernova, S. K. Badyal, Z.G. Liu, Dong-Hai Zhang, Paul Nilsson, I. Otterlund, E. Stenlund, I. Y. Chasnikov, A. S. Gaitinov, Y.X. Li, Y. A. Alexandrov, V. Vashisht, N. V. Petrov, S. Garpman, L. Liang, D. Skelding, Y. C. Kim, E. R. Ganssauge, B. Singh, J. T. Rhee, E. K. Kanygina, V. I. Bubnov, L. K. Mangotra, M. I. Adamovich, W. Y. Qian, L.Z. Yu, Rashmi Raniwala, N. G. Peresadko, E. S. Basova, N. S. Lukicheva, Maria Haiduc, S. B. Luo, K. Söderström, V.I. Skorobogatova, Bo Jakobsson, M. I. Tretyakova, Alexander Kovalenko, Janka Vrlakova, A.K. Musaeva, G.M. Chen, Shi-kun Wang, K. G. Gulamov, S.Q. Feng, J. J. Lord, V. Kumar, J. Grote, L. N. Svechnikova, X. Cai, L. Just, A.M. Seitimbetov, Joakim Nystrand, V. V. Rusakova, T. P. Trofimova, C.G. Lee, Z.B. Yin, V. A. Plyushchev, S. Vokal, N. K. Rao, C.B. Yang, S.A. Krasnov, X.R. Wang, D. C. Zhou, S. Dhamija, V. S. Bhatia, Andrei Gheata, A. M. Bakich, N. A. Salmanova, L. S. Liu, V. G. Larionova, S. Lokanathan, N. P. Andreeva, M. Tothova, Anju Bhasin, N. Saidkhanov, S. G. Gerassimov, K. B. Bhalla, M. M. Chernyavski, Madan M. Aggarwal, Mihaela Gheata, R. Amirikas, Z. Q. Weng, L.S. Peak, P. Y. Zheng, U.I. Tuleeva, I. S. Mittra, S. P. Kharlamov, C.I. Shakhova, Y.M. Qin, D. Felea, V. S. Navotny, O. V. Levitskaya, K. El Chenawi, Z.R. Hu, Y. Lu, D.M. Seliverstov, G. I. Orlova, Vivek K. Gupta, Shiv K. Gupta, V. Bradnova, and M. Roeper

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Charged particle
Abstract

Results on charged particle multiplicities, densities and fluctuations from central Pb+Pb interactions at 158 A GeV are presented and discussed.

Published
1997

14. Proton and deuteron structure functions in muon scattering at 470 GeV

Author

Michael Schmitt, Andris Skuja, V. Eckardt, H. E. Montgomery, A. Manz, A. Zghiche, Richard Wilson, Jan Figiel, S. Söldner-Rembold, Tiefu Zhao, G. Siegert, V. Papavassiliou, F. M. Pipkin, F. S. Dietrich, R. W. Finlay, S. Magill, L.S. Osborne, R. Otten, Henry Lubatti, S. B. Kaufman, Norbert Schmitz, A. A. Bhatti, B. Baller, H. L. Melanson, K. Olkiewicz, T. Dreyer, R. A. Swanson, C. Halliwell, R. B. Nickerson, M. Erdmann, H. J. Gebauer, M. D. Baker, H. Schellman, R. Davisson, Janet Conrad, Jorge G. Morfin, J. Haas, H. E. Jackson, Timothy J. Carroll, D. H. Potterveld, W. Dougherty, B. Pawlik, K. A. Griffioen, D. Hantke, G. Y. Fang, S. Wolbers, P. Spentzouris, J. Novak, D. G. Michael, G. A. Snow, W. Wittek, U. Ecker, A. Röser, Shuichi Kunori, H. G. E. Kobrak, E. J. Ramberg, H. M. Braun, D. McLeod, P. Madden, H. L. Clark, E. R. Kinney, C. W. Salgado, D. M. Jansen, Mark Raymond Adams, J. J. Lord, D. A. Averill, A. Banerjee, D. F. Geesaman, G. Jancso, A. V. Kotwal, P. L. Anthony, S. O'Day, M. Wilhelm, D. E. Jaffe, R. S. Guo, J. J. Ryan, S. Aïd, U. Bratzler, K. Hicks, P. Stopa, R. D. Kennedy, H. E. Stier, H. Venkataramania, A. Salvarani, Z. Jin, and I. Derado

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Muon, Proton, Scattering, Hadron, High Energy Physics::Experiment, HERA, Atomic physics, Connection (algebraic framework), Twist, Inelastic scattering
Abstract

The proton and deuteron structure functions F2 p and F2 d are measured in inelastic muon scattering with an average beam energy of 470 GeV. The data were taken at Fermilab experiment E665 during 1991 and 1992 using liquid hydrogen and deuterium targets. The F2 measurements are reported in the range 0.0008

Published
1996

15. On the production of slow particles in high energy heavy ion collisions

Author

L. P. Chernova, C.B. Yang, S.A. Krasnov, S. B. Luo, S. P. Kharlamov, D. H. Zhang, D. Skelding, B.P. Tursunov, V. G. Bogdanov, Z.V. Anzon, Y.M. Qin, I. Y. Chasnikov, Z. I. Solovieva, S. N. Shpilev, Y. A. Alexandrov, G. S. Kalyachkina, P. Y. Zheng, N. V. Petrov, L. N. Svechnikova, L. K. Mangotra, E. K. Kanygina, Alexander Kovalenko, V. I. Bubnov, M. I. Tretyakova, S. Mokerjee, L. Just, T. P. Trofimova, G. S. Shabratova, X. Cai, S. Kitroo, R. Raniwala, S. Kachroo, C. Graf, V. V. Rusakova, S.Z. Nasyrov, D. C. Zhou, K. Söderström, Janka Vrlakova, N. P. Andreeva, M. Karabova, R. J. Wilkes, H. Q. Wang, A. M. Bakich, J. Nystrand, I. S. Mittra, W. Y. Qian, S. G. Gerassimov, Anju Bhasin, Y. D. Li, M. Tothova, N. Saidkhanov, A. S. Gaitinov, S. Dhamija, Sudhir Raniwala, C.I. Shakhova, N. A. Salmanova, S. K. Gupta, Bo Jakobsson, S. Vokal, Y. L. Xia, V. A. Plyushchev, Z. Q. Weng, M. Roeper, L.S. Peak, V. R. Sarkisyan, J. J. Lord, V. S. Navotny, V. Bradnova, Renu Arora, N. V. Maslennikova, J. Grote, V. S. Bhatia, L. S. Liu, N. G. Peresadko, E. S. Basova, V. G. Larionova, S. I. Zhokhova, M. M. Chernyavski, S. Garpman, G. I. Orlova, M. J. Adamovich, D. A. Carshiev, U.I. Tuleeva, E. R. Ganssauge, A.M. Seitimbetov, T. H. Burnett, N. K. Rao, Evert Anders Stenlund, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, V. K. Gupta, K. G. Gulamov, V. Kumar, S. Lokanathan, G. Z. Eligbaeva, K. B. Bhalla, R. Amirikas, M. Ochs, I. Otterlund, L. E. Fremenko, N. S. Lukicheva, S. K. Badyal, F. A. Avetyan, and L. G. Sarkisova

Subjects
Physics, High energy, Physics and Astronomy (miscellaneous), Chemical physics, Yield (chemistry), Hadron, Heavy ion, Impact parameter, Atomic physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract

The mechanism for producing slow, target associated particles in high energy heavy ion collisions is investigated. It is shown that the same mechanism which was proposed for hadron induced interactions is likely to appear also for heavy-ion reactions. The results indicate however a much weaker correlation between impact parameter and yield of slow particles.

Published
1995

16. 28Si(32S) fragmentation at 3.7 A, 14.6 A and 200 A GeV

Author

M. I. Tretyakova, X. Cai, L. N. Svechnikova, B.P. Tursunov, L. E. Eremenko, G. S. Shabratova, Bo Jakobsson, M. Ochs, S. Vokal, R. Raniwala, Alexander Kovalenko, T. H. Burnett, R. J. Wilkes, V. R. Sarkisyan, S. K. Gupta, V. I. Bubnov, V. A. Plyushchev, Renu Arora, G. S. Kalyachkina, T. P. Trofimova, V. S. Bhatia, L. S. Liu, V. G. Larionova, C.B. Yang, S.Z. Nasyrov, V. K. Gupta, S. P. Kharlamov, L. P. Chernova, V. G. Bogdanov, V. Bradnova, V. V. Rusakova, Y. L. Xia, Z.V. Anzon, Y.M. Qin, N. P. Andreeva, D. H. Zhang, S. Kachroo, I. Y. Chasnikov, V. S. Navotny, S. G. Gerassimov, Anju Bhasin, N. Saidkhanov, Y. A. Alexandrov, N. V. Petrov, C. Graf, K. Söderström, D. Skelding, M. M. Chernyavski, N. G. Peresadko, E. S. Basova, M. Karabova, K. B. Bhalla, S. B. Luo, G. I. Orlova, K. G. Gulamov, V. Kumar, Z. Q. Weng, H. Q. Wang, R. Amirikas, F. A. Avetyan, S. Garpman, S. K. Badayal, S. Dhamia, J. Nystrand, N. S. Lukicheva, Z. I. Solovieva, D. C. Zhou, W. Y. Qian, S. N. Shpilev, S. A. Karsnov, I. S. Mittra, G. Z. Eligbaeva, A. S. Gaitinov, C.I. Shakhova, L. G. Sarkisova, A. M. Bakich, S. Mokerjee, E. K. Kanygina, S. Kitroo, A.M. Seitimbetov, N. K. Rao, Janka Vrlakova, S. Lokanathan, L.S. Peak, J. J. Lord, J. Grote, M. Tothova, M. I. Adamovich, Sudhir Raniwala, Evert Anders Stenlund, P. Y. Zheng, L. K. Mangotra, M. Roeper, E. R. Ganssauge, N. V. Maslennikova, S. I. Zhokhova, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, Y. D. Li, L. Just, N. A. Salmanova, D. A. Carshiev, U.I. Tuleeva, and I. Otterlund

Subjects
Nuclear reaction, Nuclear physics, Physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Astrophysics::High Energy Astrophysical Phenomena, Charge density, Nuclear fusion, High Energy Physics::Experiment, Spallation, Atomic physics, Nuclear Experiment
Abstract

The fragmentation topology of28Si at 3.7A GeV and 14.6A GeV and32S at 200A GeV in reactions with emulsion nuclei is presented. The fragmentation cross sections are very similar at all three energies. A statistical percolation model can qualitatively describe the data forZ≥ 6. The He production is underestimated and the 3 ≤Z ≤ 5 fragments overestimated by this model.

Published
1995

17. Extraction of the RatioF2n/F2pfrom Muon-Deuteron and Muon-Proton Scattering at SmallxandQ2

Author

Andris Skuja, G. Siegert, R. Davisson, G. Y. Fang, V. Eckardt, H. E. Montgomery, F. M. Pipkin, A. Banerjee, A. Salvarani, D. G. Michael, W. Dougherty, P. Spentzouris, Henry Lubatti, G. A. Snow, M. Wilhelm, R. S. Guo, S. Aïd, T. Dreyer, V. Papavassiliou, D. McLeod, S. O'Day, K. A. Griffioen, Jan Figiel, H. E. Jackson, K. P. Schüler, E. J. Ramberg, S. Magill, M. D. Baker, B. Baller, H. J. Gebauer, J. J. Ryan, I. Derado, J. Haas, W. Wittek, L.S. Osborne, M. R. Adams, D. Hantke, M. Erdmann, Z. Jin, A. Manz, D. E. Jaffe, A. Zghiche, Roger W. Finlay, H. G. E. Kobrak, R. A. Swanson, H. Schellman, G. Jancso, K. Olkiewicz, A. Röser, Richard Wilson, K. Hicks, H. L. Melanson, P. L. Anthony, S. Söldner-Rembold, Shuichi Kunori, U. Bratzler, H. E. Stier, R. B. Nickerson, N. Schmitz, P. Madden, H. L. Clark, Tiefu Zhao, Michael Schmitt, B. Pawlik, D. H. Potterveld, D. M. Jansen, A. V. Kotwal, R. D. Kennedy, U. Ecker, E. R. Kinney, J. J. Lord, R. Otten, S. B. Kaufman, D. A. Averill, S. Wolbers, H. M. Braun, P. Stopa, Satish Dhawan, C. Halliwell, D. F. Geesaman, V. W. Hughes, C. W. Salgado, Janet Conrad, Timothy J. Carroll, Jorge G. Morfin, J. Novak, H. Venkataramania, F. S. Dietrich, and A. A. Bhatti

Subjects
Nuclear physics, Physics, Muon, Deuterium, Proton, Scattering, Proton scattering, Structure function, Analytical chemistry, General Physics and Astronomy
Abstract

The ratio of the deuteron to proton structure functions is measured at very small Bjorken {ital x} (down to 10{sup --6}) and for {ital Q}{sup 2}{gt}0.001 GeV{sup 2} from scattering of 470 GeV muons on liquid hydrogen and deuterium targets. The ratio {ital F}{sup {ital n}}{sub 2}/{ital F}{sup {ital p}}{sub 2} extracted from these measurements is found to be constant, at a value of 0.935{plus_minus}0.008{plus_minus}0.034, for {ital x}{lt}0.01. This result suggests the presence of nuclear shadowing effects in the deuteron. The dependence of the ratio on {ital Q}{sup 2} is also examined; no significant variation is found.

Published
1995

18. Particle production in gold and lead induced interactions at AGS and SPS

Author

M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, M. Karabova, N. A. Salmanova, H. Q. Wang, W. Y. Qian, M. Roeper, J. Nystrand, E. R. Ganssauge, F.A. Aveytan, T. H. Burnett, M Hajduk, V. I. Bubnov, I. S. Mittra, I. Otterlund, C.I. Shakhova, V. K. Gupta, M. I. Adamovich, L. Just, V. Bradnova, V. V. Rusakova, Y. L. Xia, M. Ochs, S. P. Kharlamov, J. J. Lord, S. Dhamija, V. G. Bogdanov, J. Grote, Z.V. Anzon, Y.M. Qin, V. S. Navotny, M. M. Chernyavski, G. S. Kalyachkina, A.M. Seitimbetov, Bhartendu K. Singh, M. I. Tretyakova, U.I. Tuleeva, R. Sethi, S. K. Gupta, V. A. Plyushchev, N. K. Rao, S. Kitroo, X. Cai, S. Lokanatan, L. G. Sarkisova, A. S. Gaitinov, Janka Vrlakova, A.K. Musaeva, P. Y. Zheng, D. C. Zhou, B.P. Tursunov, K. G. Gulamov, V. Kumar, V. S. Bhatia, Alexander Kovalenko, C.B. Yang, T. P. Trofimova, A. M. Bakich, G. Z. Eligbaeva, Anju Bhasin, N. Saidkhanov, L. S. Liu, V. G. Larionova, S. A. Krasnov, K. B. Bhalla, G. I. Orlova, L. N. Svechnikova, N. V. Maslennikova, M. Thotova, S. K. Badyal, E.K. Kanygian, R. Amirikas, G. S. Shabratova, Z. Q. Weng, R. Raniwala, N. S. Lukicheva, S. I. Zhokhova, Evert Anders Stenlund, S. B. Luo, S. N. Shpilev, R. J. Wilkes, L. E. Eremenko, Bo Jakobsson, S. Vokal, V. R. Sarkisyan, S.Z. Nasyrov, Z. I. Solovjeva, S. Kachroo, C. Graf, K. Söderström, L. P. Chernova, D. H. Zhang, I. Y. Chasnikov, Y. A. Alexandrov, N. V. Petrov, D. Skelding, L.S. Peak, N. G. Peresadko, E. S. Basova, S. Garpman, X.R. Wang, N. P. Andreeva, S. G. Gerassimov, and L. K. Mangotra

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Large Hadron Collider, Lead (geology), Physics::Instrumentation and Detectors, Nuclear Theory, Physics::Accelerator Physics, Particle, High Energy Physics::Experiment, Nuclear Experiment
Abstract

In this talk we will present some of the recent results from the experiments E863 and EMU12 using the BNL AGS Au-beam at 11.6 A GeV/c and the CERN SPS Pb-beam at 158 A GeV, respectively. Aspects on the particle production and on the target break-up will be discussed. The results are compared with model expectations. The lead data is here shown for the first time.

Published
1995

19. Charged particle density distributions in Au induced interactions with emulsion nuclei at 10.7 A GeV

Author

E. R. Ganssauge, A.M. Seitimbetov, N. K. Rao, S. Lokanatan, A. S. Gaitinov, M. Tothova, L. E. Eremenko, P. Y. Zheng, I. Otterlund, M. I. Tretyakova, Bo Jakobsson, S. Vokal, N. V. Petrov, X. Cai, V. R. Sarkisyan, S.Z. Nasyrov, Z. I. Solovjeva, B.P. Tursunov, S. P. Kharlamov, M. Roeper, V. G. Bogdanov, Z.V. Anzon, R. J. Wilkes, Y.M. Qin, N. P. Andreeva, Evert Anders Stenlund, Anju Bhasin, N. Saidkhanov, N. V. Maslennikova, F. A. Avetyan, M. Karabova, D. Skelding, S. N. Shpilev, S. G. Gerassimov, H. Q. Wang, W. Y. Qian, S. Kitroo, M. Ochs, G. I. Orlova, Z. Q. Weng, Janka Vrlakova, M. I. Adamovich, G. S. Kalyachkina, D. A. Carshiev, U.I. Tuleeva, S. I. Zhokhova, C.B. Yang, S.A. Krasnov, Alexander Kovalenko, V. S. Navotny, L. P. Chernova, T. P. Trofimova, S. B. Luo, Y. L. Xia, N. G. Peresadko, E. S. Basova, D. H. Zhang, V. Bradnova, S. Garpman, N. S. Lukicheva, I. Y. Chasnikov, Y. A. Alexandrov, M. M. Chernyavski, S. K. Gupta, V. A. Plyushchev, L. G. Sarkisova, S. Kachroo, L. N. Svechnikova, C. Graf, Renu Arora, D. C. Zhou, K. Söderström, G. S. Shabratova, R. Raniwala, V. S. Bhatia, A. M. Bakich, L. S. Liu, V. G. Larionova, J. J. Lord, J. Grote, I. S. Mittra, C.I. Shakhova, L.S. Peak, S. K. Badyal, K. B. Bhalla, R. Amirikas, L. K. Mangotra, E. K. Kanygina, Y. D. Li, J. Nystrand, V. I. Bubnov, V. V. Rusakova, K. G. Gulamov, V. Kumar, G. Z. Eligbaeva, N. A. Salmanova, T. H. Burnett, V. K. Gupta, S. Dhamija, L. Just, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, T. Svensson, and S. Mokerjee

Subjects
Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Pseudorapidity, Particle, Nuclear emulsion, Nuclear Experiment, Charged particle beam, Spectral line, Charged particle, Fermi Gamma-ray Space Telescope
Abstract

Charged particle pseudorapidity density distributions in Au induced reactions in nuclear emulsion at 10.7 A GeV have been measured. In peripheral events the shower particle distribution exhibits a two peak structure while in central collisions it has a Gaussian shape. The spectator protons appear in the second peak in the pseudorapidity spectra and exhibits a broader momentum distribution than expected from Fermi motion. The produced particle yield in central collisions is not substantially different from phenomenological descriptions based on data from O and S induced reactions.

Published
1995

20. Measurement of Nuclear Transparencies from Exclusiveρ0Meson Production in Muon-Nucleus Scattering at 470 GeV

Author

S. Lancaster, R. A. Swanson, H. Schellman, M. Wilhelm, M. Erdmann, R. S. Guo, K. P. Schüler, G. A. Snow, R. D. Kennedy, T. Kirk, A. Banerjee, V. Papavassiliou, W. Wittek, Shuichi Kunori, A. A. Bhatti, H. E. Stier, S. Aïd, Janet Conrad, Timothy J. Carroll, B. Pawlik, Roger W. Finlay, Satish Dhawan, D. F. Geesaman, C. Halliwell, F. M. Pipkin, K. Hicks, Richard Wilson, H. G. E. Kobrak, F. Faller, U. Bratzler, V. W. Hughes, T. Zhao, D. McLeod, C. W. Salgado, D. G. Michael, H. L. Melanson, P. Spentzouris, A. Salvarani, N. Schmitz, Michael Schmitt, D. H. Potterveld, S. Wolbers, E. R. Kinney, J. J. Lord, B. Baller, S. Magill, J. J. Ryan, Andris Skuja, A. Röser, H. Venkataramania, F. S. Dietrich, Z. Jin, Jorge G. Morfin, D. A. Averill, A. V. Kotwal, R. Davisson, S. O'Day, W. Dougherty, V. Eckardt, H. E. Montgomery, K. A. Griffioen, H. E. Jackson, H. J. Gebauer, G. Y. Fang, I. Derado, H. M. Braun, P. Stopa, A. Manz, S. Söldner-Rembold, M. D. Baker, D. Hantke, G. Siegert, Wit Busza, H. Breidung, R. Otten, S. B. Kaufman, T. Dreyer, L.S. Osborne, M. R. Adams, E. J. Ramberg, J. Haas, P. Madden, H. L. Clark, D. M. Jansen, Henry Lubatti, A. Zghiche, G. Jancso, P. L. Anthony, R. B. Nickerson, K. Olkiewicz, Jan Figiel, and U. Ecker

Subjects
Physics, Nuclear reaction, Particle physics, Muon, Meson, Physics::Instrumentation and Detectors, Scattering, Nuclear Theory, Tevatron, General Physics and Astronomy, Nuclear physics, Deuterium, Nuclear transparency, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Nuclear Experiment
Abstract

Nuclear transparencies measured in exclusive incoherent ${\mathrm{\ensuremath{\rho}}}^{0}$ meson production from hydrogen, deuterium, carbon, calcium, and lead in muon-nucleus scattering are reported. The data were obtained with the E665 spectrometer using the Fermilab Tevatron muon beam with a mean beam energy of 470 GeV. Increases in the nuclear transparencies are observed as the virtuality of the photon increases, in qualitative agreement with the expectations of color transparency.

Published
1995

21. Helium production in 10.7 A GeV Au induced nucleus-nucleus collisions

Author

D. Skelding, L. K. Mangotra, R. J. Wilkes, M. I. Tretyakova, X. Cai, M. Ochs, J. J. Lord, D. C. Zhou, J. Grote, S. Kitroo, N. A. Salmanova, Janka Vrlakova, A. M. Bakich, B.P. Tursunov, L. E. Eremenko, I. S. Mittra, L. P. Chernova, Evert Anders Stenlund, Bo Jakobsson, M. Karabova, H. Q. Wang, S.Z. Nasyrov, Z. I. Solovjeva, S. Vokal, N. P. Andreeva, C.I. Shakhova, W. Y. Qian, V. R. Sarkisyan, S. Kachroo, D. H. Zhang, N. S. Lukicheva, S. P. Kharlamov, S. K. Badyal, C. Graf, S. G. Gerassimov, V. G. Bogdanov, Y. L. Xia, I. Y. Chasnikov, Z.V. Anzon, K. Söderström, E. R. Ganssauge, Y. A. Alexandrov, V. I. Bubnov, Y.M. Qin, N. V. Petrov, G. S. Kalyachkina, M. I. Adamovich, L. Just, M. Tothova, V. V. Rusakova, F. A. Avetyan, Anju Bhasin, M. Roeper, M. M. Chernyavski, N. Saidkhanov, L.S. Peak, S. B. Luo, A. S. Gaitinov, N. G. Peresadko, E. S. Basova, K. B. Bhalla, R. Amirikas, I. Otterlund, Z. Q. Weng, L. G. Sarkisova, S. Garpman, S. N. Shpilev, Alexander Kovalenko, D. A. Carshiev, M. M. Aggarwal, U.I. Tuleeva, Sudhir Raniwala, N. V. Maslennikova, T. P. Trofimova, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, E. K. Kanygina, T. H. Burnett, S. I. Zhokhova, S. Dhamija, V. K. Gupta, Y. D. Li, K. G. Gulamov, V. Kumar, P. Y. Zheng, G. Z. Eligbaeva, A.M. Seitimbetov, N. K. Rao, S. Lokanatan, J. Nystrand, V. Bradnova, S. Mokerjee, L. N. Svechnikova, G. S. Shabratova, R. Raniwala, V. S. Navotny, G. I. Orlova, S. K. Gupta, V. A. Plyushchev, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, C.B. Yang, and S.A. Krasnov

Subjects
Physics, Nuclear and High Energy Physics, chemistry.chemical_element, Nuclear physics, medicine.anatomical_structure, chemistry, Fragmentation (mass spectrometry), Total angular momentum quantum number, Angular momentum of light, Transverse momentum, medicine, Atomic physics, Nuclear Experiment, Nucleus, Helium
Abstract

Angular distributions of projectile-associated He fragments from Au induced reactions in nuclear emulsions at 10.7 A GeV have been measured with a precision of ±0.1 mrad. Two emission components are indubitably appearing, one representing fragmentation of a fermionic system while the other one exhibits large transverse momentum transfer. Possible explanations for the latter component are discussed.

Published
1994

22. Scaled energy (z) distributions of charged hadrons observed in deep-inelastic muon scattering at 490 GeV from xenon and deuterium targets

Author

S. Magill, A. Eskreys, W. Wittek, B. Pawlik, R. A. Swanson, P. H. Steinberg, H. Venkataramania, H. Schellman, M. Wilhelm, S. Wolbers, H. G. E. Kobrak, H. M. Braun, U. Ecker, P. Malecki, Ronald Gilman, W. Dougherty, M. D. Baker, S. Krzywdzinski, S. Aïd, R. L. Talaga, Satish Dhawan, C. Halliwell, D. Hantke, N. Schmitz, Shuichi Kunori, G. A. Snow, J. Wilkes, A. Salvarani, D. G. Michael, Jim Hanlon, D. F. Geesaman, S. Söldner-Rembold, R. Davisson, Jorge G. Morfin, H. E. Jackson, T. Kirk, V. Papavassiliou, K. Dziunikowska, F. M. Pipkin, M. C. Green, A. A. Bhatti, H. L. Melanson, V. W. Hughes, H. J. Trost, Richard Wilson, G. Coutrakon, A. Manz, S. O'Day, Wit Busza, Janet Conrad, H. J. Seyerlein, Timothy J. Carroll, H. E. Stier, Andris Skuja, J. F. Bartlett, I. Derado, W. Mohr, Michael Schmitt, S. Tentindo-Repond, A. Röser, V. Eckardt, H. E. Montgomery, H. J. Gebauer, D. McLeod, T. Dreyer, L.S. Osborne, M. Vidal, M. R. Adams, J. J. Ryan, J. Haas, P.L. Anthony, Tiefu Zhao, E. J. Ramberg, Martin Erdmann, S. B. Kaufman, D. M. Jansen, D. E. Jaffe, K. P. Schüler, P. Stopa, R. D. Kennedy, Henry Lubatti, G. Jancso, J. J. Lord, K. Olkiewicz, R. B. Nickerson, and Jan Figiel

Subjects
Physics, Nuclear reaction, Particle physics, Muon, Scattering, Computer Science::Information Retrieval, Momentum transfer, Hadron, Inelastic scattering, Deep inelastic scattering, Nuclear physics, Deuterium, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Fermilab Experiment-665 measured deep-inelastic scattering of 490 GeV muons off deuterium and xenon targets. Events were selected with a range of energy exchange [nu] from 100 GeV to 500 GeV and with large ranges of [ital Q][sup 2] and [ital x][sub Bj]: 0.1 GeV[sup 2]/[ital c][sup 2][lt][ital Q][sup 2][lt]150 GeV[sup 2]/[ital c][sup 2] and 0.001[lt][ital x][sub Bj][lt]0.5. The fractional energy ([ital z]) distributions of forward-produced hadrons from the two targets have been compared as a function of the kinematics of the scattering; specifically, the kinematic region of shadowing'' has been compared to that of nonshadowing. The dependence of the distributions upon the [ital order] of the hadrons, determined by the fractional energies, has been examined as well; a strong degree of similarity has been observed in the shapes of the distributions of the different order hadrons. These [ital z] distributions, however, show no nuclear dependence, even in the kinematic region of shadowing.

Published
1994

23. Rapidity density distributions and their fluctuations in violent Au-induced nuclear interactions at 11.6 A GeV/c

Author

Evert Anders Stenlund, M. I. Adamovich, M. I. Tretyakova, M. M. Aggarwal, N. A. Marutyan, Y. L. Xia, I. K. Bazanov, X. Cai, S. Lokanathan, D. Skelding, S. N. Shpilev, R. J. Wilkes, L. N. Svechnikova, N. G. Peresadko, E. S. Basova, L. K. Mangotra, S. Garpman, K. D. Tolstov, G. S. Shabratova, R. Raniwala, Y. D. Li, B.P. Tursunov, L. G. Sarkisova, L. Just, M. Tothova, E. K. Kanygina, D. C. Zhou, Sudhir Raniwala, A. S. Gaitinov, V. I. Bubnov, L. P. Chernova, S. P. Kharlamov, S. Mookerjee, Z. I. Solovjeva, S. B. Luo, G. F. Xu, T. P. Trofimova, V. G. Bogdanov, Z.V. Anzon, Y.M. Qin, V. S. Navotny, I. F. Chasnikov, M. Ochs, E. R. Ganssauge, T. I. Shakhova, D. H. Zhang, M. M. Chernyavsky, V. N. Lepetan, I. S. Mittra, Anju Bhasin, N. Saidkhanov, E. L. Surin, L. E. Eremenko, N. K. Rao, Y. A. Alexandrov, Bo Jakobsson, G. I. Orlova, N. V. Petrov, S. Vokal, P. Y. Zheng, V. R. Sarkisyan, Z. Q. Weng, J. J. Lord, S. K. Badyal, N. V. Maslennikova, J. Nystrand, H. S. Palsania, F. A. Avetyan, N. P. Andreeva, S. H. Nasyrov, J. Grote, S. I. Zhokhova, S. G. Gerassimov, T. Koss, S. K. Gupta, V. A. Plyushchev, Renu Arora, S. Kachroo, M. Karabova, D. A. Qarshiev, M. Roeper, H. Q. Wang, V. S. Bhatia, L. S. Liu, K. Söderström, V. G. Larionova, W. Y. Qian, T. H. Burnett, T. N. Maksimkina, I. Otterlund, G. S. Kalyachkina, V. K. Gupta, K. G. Gulamov, V. Kumar, C.B. Yang, S. A. Krasnov, G. Z. Eligbaeva, P. Lal, K. B. Bhalla, N. S. Lukicheva, D. A. Carshiev, U.I. Tuleeva, N. A. Salmanova, S. Kitroo, and Janka Vrlakova

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, SIMPLE (dark matter experiment), Particle physics, Density distribution, Nuclear Theory, Extrapolation, Rapidity, Nuclear Experiment, Charged particle
Abstract

The first rapidity density distributions from relativistic collisions between truly heavy nuclei are presented. The distributions are compared with expectations from a linear extrapolation of results obtained from collisions with lighter nuclei. Fluctuations are essentially described by a simple scenario with stochastic emission.

Published
1994

24. Q2dependence of the average squared transverse energy of jets in deep-inelastic muon-nucleon scattering with comparison to perturbative QCD predictions

Author

W. Wittek, H. Venkataramania, H. G. E. Kobrak, Jim Hanlon, G. A. Snow, S. Krzywdzinski, D. M. Jansen, S. Söldner-Rembold, Shuichi Kunori, Henry Lubatti, S. Arndotïd, B. Pawlik, D. F. Geesaman, Satish Dhawan, C. Halliwell, D. G. Michael, S. Wolbers, G. Coutrakon, Jorge G. Morfin, Jan Figiel, H. L. Melanson, V. W. Hughes, J. Wilkes, U. Ecker, P. Malecki, M. D. Baker, F. M. Pipkin, E. J. Ramberg, Martin Erdmann, H. M. Braun, H. J. Gebauer, W. Dougherty, A. Manz, V. Papavassiliou, L.S. Osborne, C. W. Salgado, H. E. Jackson, Andris Skuja, M. R. Adams, T. Kirk, H. E. Stier, D. Hantke, R. B. Nickerson, K. Dziunikowska, Ronald Gilman, D. E. Jaffe, V. Eckardt, S. O'Day, G. Jancso, N. Schmitz, H. E. Montgomery, A. Eskreys, M. Wilhelm, R. Davisson, R. A. Swanson, P. H. Steinberg, H. Schellman, R. L. Talaga, J. J. Ryan, S. Magill, M. C. Green, D. McLeod, K. Olkiewicz, Michael Schmitt, S. Tentindo-Repond, A. Salvarani, H. J. Trost, A. A. Bhatti, Janet Conrad, T. Dreyer, J. F. Bartlett, K. P. Schüler, A. Röser, I. Derado, J. J. Lord, W. Mohr, J. Haas, P.L. Anthony, Wit Busza, Tiefu Zhao, Richard Wilson, S. B. Kaufman, P. Stopa, and R. D. Kennedy

Subjects
Physics, Quantum chromodynamics, Particle physics, Muon, Computer Science::Information Retrieval, Momentum transfer, General Physics and Astronomy, Perturbative QCD, Parton, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

The average squared transverse energy of jets in deep-inelastic muon-nucleon scattering is measured as a function of the momentum transfer squared ([ital Q][sup 2]), in the range 3[lt][ital Q][sup 2][lt]25 GeV[sup 2]. Perturbative QCD predicts that the average squared parton transverse energy will depend upon the strong coupling constant ([alpha][sub [ital S]]). Identifying the transverse energy of the jets with those of the corresponding partons, [alpha][sub [ital S]] is found to vary with [ital Q][sup 2] as predicted by QCD.

Published
1994

25. Perturbative QCD effects observed in 490 GeV deep-inelastic muon scattering

Author

K. P. Schüler, S. Aïd, Norbert Schmitz, D. F. Geesaman, U. Ecker, M. Erdmann, Mark Raymond Adams, K. Olkiewicz, K. Dziunikowska, R. L. Talaga, T. Kirk, P. L. Anthony, Pa. Malecki, Wit Busza, M. D. Baker, Ronald Gilman, H. J. Trost, B. Pawlik, S. Krzywdzinski, H. J. Gebauer, H. L. Melanson, A. Eskreys, S. O'Day, D. McLeod, Shuichi Kunori, R. A. Swanson, P. H. Steinberg, H. Schellman, Jan Figiel, R. Davisson, J. J. Lord, H. E. Stier, Jorge G. Morfin, D. G. Michael, F. M. Pipkin, E. J. Ramberg, S. Wolbers, S. Magill, R. D. Kennedy, V. Papavassiliou, D. E. Jaffe, R. B. Nickerson, W. Dougherty, D. M. Jansen, Michael Schmitt, C. Halliwell, L. S. Osborne, V. W. Hughes, C. W. Salgado, J. Wilkes, S. K. Dhawan, A. Röser, Richard Wilson, H. Venkataramania, A. A. Bhatti, A. Manz, A. Salvarani, D. Hantke, Andris Skuja, V. Eckardt, G. A. Snow, H. E. Montgomery, Janet Conrad, G. Coutrakon, J. J. Ryan, T. Dreyer, J. Haas, H. M. Braun, P. Stopa, S. Söldner-Rembold, Tiefu Zhao, M. C. Green, S. B. Kaufman, H. E. Jackson, W. Wittek, H. G. E. Kobrak, J. F. Bartlett, G. Jancso, I. Derado, S. Tentindo-Repond, W. Mohr, Jim Hanlon, Henry Lubatti, and M. Wilhelm

Subjects
Quantum chromodynamics, Physics, Particle physics, Muon, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Elementary particle, Parton, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Results on forward charged hadrons in 490 GeV deep-inelastic muon scattering are presented. The transverse momenta, azimuthal asymmetry, and energy flow of events with four or more forward charged hadrons are studied. The range of the invariant hadronic mass squared 300[lt][ital W][sup 2][lt]900 GeV[sup 2]/[ital c][sup 4] extends higher than previous deep-inelastic muon scattering experiments. Data are compared to the predictions of the Lund Monte Carlo model with perturbative QCD simulated by matrix elements, parton showers, and color dipole radiation. All of the QCD-based models are consistent with the data while a model without QCD processes is not. Correlations with the multiplicity-independent event variable [Pi][congruent][summation][vert bar][ital p][sub [ital T]][vert bar] are studied. The relationship between the azimuthal asymmetry and transverse momentum of forward hadrons is also presented. The data are most consistent with intrinsic parton transverse momentum squared [ital k][sub [ital T]][sup 2] of 0.25 GeV[sup 2]/[ital c][sup 2].

Published
1993

26. Systematic investigation of scaled factorial cumulant moments for nucleus-nucleus interactions

Author

G. Z. Eligbaeva, H. S. Palsania, B.P. Tursunov, M. M. Chernyavski, T. H. Burnett, N. K. Rao, G. S. Kalyachkina, V. K. Gupta, S. Kachroo, D. Skelding, K. Söderström, J. Nystrand, J. T. Rhee, Z. O. Weng, Z. V. Anson, L. P. Chernova, L. G. Sarkisova, N. A. Salmanova, L. E. Eremenko, T. P. Trofimova, L. N. Svechnikova, H. Huang, V. I. Bubnov, S. Mookerjee, E. R. Ganssauge, D. H. Zhang, G. I. Orlova, M. Karabova, H. Q. Wang, L. K. Mangotra, K. B. Bhalla, I. S. Mittra, Anju Bhasin, N. Saidkhanov, H. H. Heckman, Sudhir Raniwala, S. Vokal, W. Y. Qian, G. S. Shabratova, R. Raniwala, B. Jacobsson, V. M. Rappoport, Y. A. Alexandrov, S.Z. Nasyrov, B. Judek, N. S. Lukicheva, N. V. Petrov, Z. I. Solovieva, N. G. Peresadko, E. S. Basova, V. R. Sarkisyan, S. Garpman, D. C. Zhou, S. A. Krasnov, K. D. Tolstov, F. A. Avetyan, P. Y. Zheng, A. S. Gaitinov, T. I. Shakhova, J. J. Lord, S. K. Gupta, S. K. Badyal, D. A. Carshiev, U.I. Tuleeva, J. Grote, T. Koss, G. F. Xu, I. Otterlund, I. Y. Chasnicov, M. I. Adamovich, S. P. Kharlamov, N. P. Andreeva, Renu Arora, V. G. Bogdanov, V. N. Lepetan, S. G. Gerassimov, S. Kitroo, Y.M. Qin, V. S. Bhatia, L. S. Liu, V. G. Larionova, M. I. Tretyakova, V. S. Navotny, J. Wilkes, X. Cai, E. K. Kanygina, S. I. Zhochova, E. L. Surin, S. Lokanathan, N. V. Maslennikova, V. A. Plyuschev, Evert Anders Stenlund, S. N. Shpilev, S. B. Luo, M. M. Aggarwal, N. A. Marutyan, I. K. Bazarov, P. Lal, J. C. Zhou, K. G. Gulamov, and V. Kumar

Subjects
Nuclear reaction, Physics, Factorial, Pseudorapidity, Inverse, High Energy Physics::Experiment, Multiplicity (mathematics), Statistical physics, Nuclear Experiment, Particle density, Cumulant, Bin
Abstract

We use scaled factorial cumulant moments to analyze pseudorapidity fluctuations in nucleus-nucleus collisions. This approach is similar to the method of scaled factorial moments except that it removes the effects of lower-order correlations upon a given moment. Significant second-order cumulants and cumulant indices (slopes with respect to bin size) are found for all of the interactions studied. These indices are found to have an inverse dependence upon average pseudorapidity particle density.

Published
1993

27. STUDY OF ANGULAR DISTRIBUTION OF HELIUM PROJECTILE FRAGMENTS IN INTERACTIONS OF 200 A GeV 32S IONS WITH EMULSION NUCLEI

Author

S. P. Kharlamov, K. D. Tolstov, D. C. Zhou, V. G. Bogdanov, G. S. Kalyachkina, Z.V. Anzon, Y.M. Qin, M. I. Adamovich, N. A. Salmanova, S. B. Luo, E. R. Ganssauge, Anju Bhasin, N. Saidkhanov, S. K. Gupta, R. J. Wilkes, V. A. Plyushchev, S. Kachroo, P. Lal, N. G. Peresadko, E. S. Basova, Y. L. Xia, S. K. Badyal, M. Tothova, Z. Q. Weng, Sudhir Raniwala, H. H. Heckman, M. Karabova, T. H. Burnett, D. A. Qarshiev, H. Q. Wang, J. Nystrand, K. Söderström, M. M. Chernyavsky, Evert Anders Stenlund, Renu Arora, V. S. Bhatia, W. Y. Qian, S. Garpman, M. I. Tretyakova, E. L. Surin, L. S. Liu, V. G. Larionova, I. Otterlund, M. M. Aggarwal, V. K. Gupta, L. P. Chernova, P. Y. Zheng, N. A. Marutyan, D. Skelding, L. S. Lukicheva, Gautam Kaul, X. Cai, L. K. Mangotra, K. G. Gulamov, V. Kumar, J. J. Lord, L. Just, S. N. Shpilev, A. S. Gaitinov, H. Nasrulaeva, T. N. Maksimkina, J. Grote, V. I. Bubnov, S. Mookerjee, D. H. Zhang, S. Lokanathan, G. Z. Eligbaeva, N. P. Andreeva, B. Judek, G. I. Orlova, I. S. Mittra, S. G. Gerassimov, H. Huang, I. Y. Chasnikov, H. S. Palsania, S. Kulikova, Y. A. Alexandrov, L. G. Sarkisova, S. Kitroo, N. V. Petrov, Z. I. Solovjeva, U.I. Tuleeva, S. H. Nasyrov, N. K. Rao, T. I. Shakhova, T. P. Trofimova, F. A. Avetyan, N. V. Maslennikova, S.A. Krasnov, S. I. Zhokhova, L. N. Svechnikova, E. K. Kanygina, L. E. Eremenko, Bo Jakobsson, S. Vokal, V. R. Sarkisyan, G. S. Shabratova, R. Raniwala, G. F. Xu, V. N. Lepetan, J. T. Rhee, V. M. Rappoport, V. S. Navotny, and K. B. Bhalla

Subjects
Physics, Nuclear and High Energy Physics, Projectile, General Physics and Astronomy, chemistry.chemical_element, Astronomy and Astrophysics, Breakup, Ion, Nuclear physics, Momentum, chemistry, Stack (abstract data type), Emulsion, Atomic physics, Nuclear Experiment, Helium, Excitation
Abstract

This paper presents data on the emission of helium fragments due to break up of 200 A GeV 32S ions in collision with emulsion nuclei. A total of 499 minimum bias events have been studied in an emulsion stack and 97 events in emulsion chambers. Emission angles of He fragments have been measured with high precision. This data has been compared with data of breakup of heavier as well as lighter projectiles and we observe that the value of the momentum spread, σ(p), increases with increasing projectile mass. The bulk part of the helium emission is consistent with a single source for helium fragments with an average excitation energy of (9.1±0.9) MeV. A tail of a few (

Published
1993

28. On intermittency in heavy-ion collisions and the importance of γ-conversion in a multi-dimensional intermittency analysis

Author

S. C. Strausz, D. Skelding, M. M. Chernyavsky, A. S. Gaitinov, P. Y. Zheng, V. M. Rappoport, P. Lal, N. A. Salmanova, G.S. Shabratova, M. I. Tretyakova, K. G. Gulamov, V. Kumar, L. P. Chernova, Madan M. Aggarwal, H. Huang, S. K. Gupta, V. A. Plyushchev, S. Vokal, X. Cai, Renu Arora, V. G. Larinova, J. T. Rhee, N. V. Maslennikova, Rashmi Raniwala, V. S. Bhatia, H. H. Heckman, N. K. Rao, L. S. Liu, F. G. Kadyrov, G. Z. Eligbaeva, S. I. Zhokhova, S. Lokanathan, Z. I. Solovjeva, N. G. Peresadko, E. S. Basova, Sudhir Raniwala, T. I. Shakhova, V. S. Navotny, S. P. Kharlamov, V. I. Bubnov, V. G. Bogdanov, Z.V. Anzon, I. Y. Chasnikov, S. Mookerjee, T. H. Burnett, Y. A. Alexandrov, I. Otterlund, Anju Bhasin, N. Saidkhanov, Gautam Kaul, N. V. Petrov, H. S. Palsania, Evert Anders Stenlund, Z. Q. Weng, Dong-Hai Zhang, J. F. Sun, L. N. Svechnikova, F. A. Avetyan, S. H. Nasyrov, U.I. Tuleeva, N. A. Marutyan, R. J. Wilkes, S. Garpman, M. Karabova, K. D. Tolstov, N. P. Andreeva, H. Q. Wang, S. G. Gerassimov, S. B. Luo, S. A. Krasnov, G. S. Kalyachkina, J. Ravina, I. S. Mittra, E. R. Ganssauge, K. B. Bhalla, H. Nasrulaeva, M. I. Adamovich, K. Söderström, G. I. Orlova, J. J. Lord, J. Grote, T. Koss, W. Y. Oian, T. P. Trofimova, L. G. Sarkisova, D. C. Zhou, S. Kachroo, S. K. Badyal, L. K. Mangotra, B. Judek, N. S. Lukicheva, L. E. Eremenko, Bo Jakobsson, V. R. Sarkisyan, E. K. Kanygina, G. F. Xu, and V. N. Lepetan

Subjects
Physics, Nuclear and High Energy Physics, Plane (geometry), Signal, Computational physics, law.invention, Azimuth, law, Phase space, Intermittency, Pseudorapidity, Particle, Atomic physics, Scaling
Abstract

Non-statistical fluctuations are used to probe the dynamical behaviour of multi-particle production in heavy-ion interactions at ultra-relativistic energies. In a one-dimensional analysis a 1〈ϱ〉-scaling is established and it is furthermore found that effects from higher-order particle correlations are small. In a two-dimensional analysis it is shown that a small background of particle pairs with a narrow opening angle can distort the observed signal. As an example we estimate the influence of γ-conversion and find that in our experiment γ-conversion alone gives results consistent with the experimental observations from a two-dimensional analysis. Whereas a two-dimensional analysis filters events where two particles are extremely close in phase space, the one-dimensional analysis picks out events with particles clustered in pseudorapidity, which are at the same time diluted in the azimuthal plane.

Published
1992

29. Local particle densities and global multiplicities in central heavy ion interactions at 3.7, 14.6, 60 and 200A GeV

Author

V. I. Bubnov, L. P. Chernova, S. Mookerjee, L. N. Svechnikova, V. M. Rappoport, D. H. Zhang, Z. I. Solovjeva, I. Y. Chasnikov, S. N. Shpilev, G. S. Shabratova, Y. A. Alexandrov, R. Raniwala, N. V. Petrov, Y. L. Xia, L. E. Eremenko, F. A. Avetyan, N. G. Peresadko, E. S. Basova, Bo Jakobsson, S. K. Gupta, M. M. Chernyavsky, S. Kachroo, K. D. Tolstov, S. Garpman, J. T. Rhee, S. Vokal, V. R. Sarkisyan, T. I. Shakhova, K. Söderström, M. I. Adamovich, S. Lokanathan, S. P. Kharlamov, E. L. Surin, V. G. Bogdanov, Gautam Kaul, Y.M. Qin, A. S. Gaitinov, J. J. Lord, D. Skelding, K. G. Gulamov, G. F. Xu, L. K. Mangotra, J. Grote, V. Kumar, B. Judek, S. K. Badyal, N. S. Lukicheva, Anju Bhasin, N. Saidkhanov, T. P. Trofimova, S. B. Luo, V. A. Plyushchev, V. S. Navotny, M. Karabova, M. M. Aggarwal, H. Huang, N. P. Andreeva, V. N. Lepetan, D. A. Qarshiev, H. Q. Wang, N. A. Marutyan, G. Z. Eligbaeva, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, W. Y. Qian, S. G. Gerassimov, Z. Q. Weng, I. S. Mittra, H. Nasrulaeva, T. N. Maksimkina, G. I. Orlova, S. Kulikova, Evert Anders Stenlund, G. S. Kalyachkina, S. I. Zhochova, M. I. Tretyakova, X. Cai, K. B. Bhalla, J. Nystrand, P. Lal, E. K. Kanygina, L. G. Sarkisova, E. R. Ganssauge, T. H. Burnett, S. A. Krasnov, V. K. Gupta, D. C. Zhou, S. Kitroo, H. H. Heckman, I. Otterlund, H. S. Palsania, N. V. Maslennikova, S. H. Nasyrov, M. Tothova, Sudhir Raniwala, N. K. Rao, P. Y. Zheng, N. A. Salmanova, L. Just, Z. V. Anson, U.I. Tuleeva, and R. J. Wilkes

Subjects
Physics, Nuclear physics, Particle physics, Physics and Astronomy (miscellaneous), Pseudorapidity, Inverse, Multiplicity (mathematics), Rapidity, Elementary particle, Quantum field theory, Particle density, Centrality, Engineering (miscellaneous)
Abstract

The energy and centrality dependence of local particle pseudorapidity densities as well as validity of various parametrizations of the distributions are examined. The dispersion, σ, of the rapidity density distribution of produced particles varies slowly with centrality and is 0.80, 0.98, 1.21 and 1.41 for central interactions at 3.7, 14.6, 60 and 200A GeV incident energy, respectively, σ is found to be independent of the size of the interacting system at fixed energy. A novel way of representing the window dependence of the multiplicity as normalized variance versus inverse average multiplicity is outlined.

Published
1992

30. First measurements of jet production rates in deep-inelastic lepton-proton scattering

Author

John P. Ryan, H. E. Stier, Tiefu Zhao, D. Hantke, E. J. Ramberg, Martin Erdmann, F. M. Pipkin, H. Venkataramania, P. Stopa, Henry Lubatti, S. B. Kaufman, G. Coutrakon, R. D. Kennedy, A. Eskreys, A. Salvarani, T. Dreyer, K. Dziunikowska, R. A. Swanson, P. H. Steinberg, Jan Figiel, H. Schellman, U. Ecker, Jorge G. Morfin, H. J. Gebauer, P. L. Anthony, B. Pawlik, J. Haas, V. Papavassiliou, D. M. Jansen, G. Jancso, M. Vidal, J. J. Lord, W. Wittek, S. O'Day, Ronald Gilman, M. Wilhelm, A. A. Bhatti, R. B. Nickerson, D. F. Geesaman, M. R. Adams, K. P. Schüler, H. J. Seyerlein, G. A. Snow, M. C. Green, W. Mohr, S. Söldner-Rembold, W. Dougherty, Satish Dhawan, C. Halliwell, H. J. Trost, H. G. E. Kobrak, I. Derado, Jim Hanlon, R. Davisson, H. M. Braun, V. W. Hughes, J. Bartlett, S. Aïd, Shuichi Kunori, Wit Busza, R. L. Talaga, S. Krzywdzinski, S. Magill, S. Tentindo-Repond, J. M. Conrad, Richard Wilson, D. G. Michael, K. Olkiewicz, D. E. Jaffe, C. W. Salgado, H. E. Jackson, L.S. Osborne, S. Wolbers, A. Manz, Andris Skuja, V. Eckardt, H. E. Montgomery, D. McLeod, A. Röser, J. Wilkes, M. D. Baker, P. Malecki, and N. Schmitz

Subjects
Nuclear physics, Quantum chromodynamics, Physics, Particle physics, Muon, Scattering, General Physics and Astronomy, High Energy Physics::Experiment, Jet (particle physics), Inelastic scattering, Deep inelastic scattering, Energy (signal processing), Lepton
Abstract

The first measurements of forward multijet rates in deep-inelastic lepton scattering are presented. Data were taken with a 490-GeV muon beam incident on a hydrogen target. The jets were defined using the GADE algorithm. The measured rates are presented as a function of the jet resolution parameter {ital y}{sub cut}, and as a function of the virtual-photon--proton center-of-momentum energy {ital W}, in the range 13{le}{ital W}{le}33 GeV. Comparisons are made to the predictions of the Lund Monte Carlo programs and good agreement is obtained when QCD corrections are included in the model.

Published
1992

31. Review of recent results on particle production from EMU01

Author

V. I. Bubnov, D. Skelding, L. P. Chernova, V. G. Bogdanov, S. Lokanathan, G. S. Shabratova, F. A. Avetyan, S. L. Kachroo, I. Y. Chasnicov, H. Huang, G. F. Xu, J. T. Rhee, Madan M. Aggarwal, D. C. Zhou, F. G. Kadyrov, I. S. Mittra, H. Nasrulaeva, R. J. Wilkes, P. Lal, K. D. Tolstov, N. G. Peresadko, V. S. Navotny, S. Raniwala, Gautam Kaul, V. S. Bhatia, T. I. Shakhova, U. Tuleeva, L. G. Sarkisova, P. Y. Zheng, J. J. Lord, H. H. Heckman, H. Palsania, J. Grote, X. Cai, V. M. Rappoport, V. R. Sarkisyan, S. B. Luo, S. H. Nasyrov, K. G. Gulamov, N. Saidkhanov, J. C. Zhou, S. C. Strausz, V. N. Lepetan, S. K. Gupta, M. I. Tretyakova, T. Koss, E. R. Ganssauge, W. Y. Qian, S. G. Gerassimov, Y. A. Alexandrov, N. A. Marutyan, Z. V. Anzon, E. Stenlund, N. V. Petrov, N. V. Maslennikova, M. M. Chernyavski, B. Judek, K. B. Bhalla, V. A. Plyuschev, N. K. Rao, R. Raniwala, Anju Bhasin, G. S. Kalyachkina, T. H. Burnett, V. G. Larionova, R. Arora, B. Jacobsson, A. S. Gaitinov, M. I. Adamovich, K. Soderstrom, S. Vokal, E. K. Kanygina, J. F. Sun, T. P. Trofimova, L. K. Mangotra, D. H. Zhang, S. Mookerjee, H. Q. Wang, M. Karabova, N. P. Andreeva, Z. O. Weng, G. Z. Eligbaeva, L. E. Eremenko, I. Otterlund, N. A. Salmanova, S. I. Zhokova, S. P. Kharlamov, S. Garpman, L. S. Liu, E. Basova, N. S. Lukicheva, V. Kumar, G. I. Orlova, S. A. Krasnov, S. K. Badyal, L. N. Svechnikova, and Z. I. Solovieva

Subjects
Physics, Nuclear and High Energy Physics, Superposition principle, Distribution (mathematics), Monte Carlo method, Detector, Particle, Statistical physics, Nuclear Experiment, Beam (structure), Charged particle, Factorial moment, Computational physics
Abstract

The EMU01 Collaboration has employed emulsion chamber and pellicle detectors to accumulate a large database of heavy nucleus interactions. Samples include both minimum bias and central collisions, analyzed in a uniform manner to extract multiplicities and angular distributions of charged particles and nuclear fragments. We find that the main features of these distribution are well represented by geometrical superposition models. A unique feature of EMU01 is the use of emulsion chambers with thin foil targets to observe produced particle angular distributions with exceptionally high precision, permitting extension of fluctuations and correlations analyses beyond the resolution limits imposed by other experimental techniques. The data are generally well reproduced by interaction simulations such as FRITIOF (the Lund monte carlo for nuclear collisons) which include only conventional physics effects. However, the analysis of fluctuations and correlations via factorial moment and cumulant techniques yields some suggestive results which require further investigation, both by continued analysis of existing data and from Au and Pb beam exposures scheduled for the next few years.

Published
1992

32. A systematic study of the energy independent behaviour of the fragmentation regions in16O-Em interactions from 3.7 to 200A GeV

Author

H. O. Wang, V. I. Bubnov, S. Mookerjee, Z. V. Anson, Anju Bhasin, N. Saidkhanov, K. Söderström, M. Karabova, W. Y. Qian, B. Judek, N. S. Lukicheva, S. Kachroo, N. G. Peresadko, E. S. Basova, M. I. Adamovich, R. J. Wilkes, G. S. Kalyachkina, Gautam Kaul, N. A. Marutyan, D. Skelding, H. Nasrulaeva, P. Lal, U.I. Tuleeva, G. I. Orlova, G. F. Xu, Sudhir Raniwala, S. Lokanathan, N. A. Salmanova, V. M. Rappoport, G.S. Shabratova, S. B. Luo, A. S. Gaitinov, T. P. Trofimova, V. N. Lepetan, L. P. Chernova, J. J. Lord, P. Y. Zheng, J. Grote, T. Koss, D. C. Zhou, S. Garpman, K. D. Tolstov, I. Y. Chasnikov, I. Otterlund, Y. A. Alexandrov, N. P. Andreeva, E. R. Ganssauge, N. V. Petrov, S. G. Gerassimov, M. M. Chernyavski, F. A. Avetyan, S. K. Gupta, I. S. Mittra, V. A. Plyushchev, Rashmi Raniwala, F. G. Kadyrov, Z. I. Solovjeva, T. I. Shakhova, S. Vokal, J. Ravina, Renu Arora, Y. Z. Liu, M. I. Tretyakova, V. S. Bhatia, L. S. Liu, V. G. Larionova, X. Cai, N. K. Rao, Madan M. Aggarwal, K. B. Bhalla, V. S. Navotny, S. P. Kharlamov, V. G. Bogdanov, Z. O. Weng, L. G. Sarkisova, N. V. Maslennikova, E. K. Kanygina, L. E. Eremenko, Bo Jakobsson, V. R. Sarkisyan, S. K. Badyal, H. S. Palsania, S. H. Nasyrov, S. C. Strausz, K. G. Gulamov, V. Kumar, S. A. Krasnov, L. K. Mangotra, G. Z. Eligbaeva, Evert Anders Stenlund, T. H. Burnett, Dong-Hai Zhang, S. I. Zhochova, H. H. Heckman, L. N. Svechnikova, and J. T. Rhee

Subjects
Physics, Physics and Astronomy (miscellaneous), Projectile, Limiting, Statistical fluctuations, law.invention, Nuclear physics, Fragmentation (mass spectrometry), law, Intermittency, Incident energy, Multiplicity (chemistry), Nuclear Experiment, Engineering (miscellaneous), Scaling
Abstract

The scaling behaviour in the fragmentation regions is investigated for16O-Em interactions from 3.7 to 200A GeV. It is found that in both the projectile- and the target-fragmentation regions, the multiplicity and pseudo-rapidity distributions as well as the two-particle pseudo-rapidity correlations are independent of incident energy. The intermittency indices at 14.6, 60 and 200A GeV are the same within the experimental errors, indicating that the limiting fragmentation hypothesis works with regard to dynamical as well as statistical fluctuations.

Published
1992

33. Saturation of shadowing at very low Bjorkenx

Author

H. L. Melanson, B. Pawlik, S. Magill, M. Wilhelm, M. D. Baker, S. Aïd, D. Hantke, G. A. Snow, S. Söldner-Rembold, S. O'Day, Shuichi Kunori, Jorge G. Morfin, R. Davisson, Satish Dhawan, C. Halliwell, Tiefu Zhao, H. M. Braun, L.S. Osborne, V. Papavassiliou, D. G. Michael, M. R. Adams, S. Wolbers, U. Ecker, H. E. Jackson, H. J. Seyerlein, R. L. Talaga, H. Venkataramania, Richard Wilson, W. Wittek, F. M. Pipkin, Michael Schmitt, S. Tentindo-Repond, Ronald Gilman, Andris Skuja, H. G. E. Kobrak, A. Röser, D. M. Jansen, Jan Figiel, A. A. Bhatti, A. Eskreys, S. Krzywdzinski, R. A. Swanson, P. H. Steinberg, S. B. Kaufman, H. Schellman, H. E. Stier, Janet Conrad, J. J. Ryan, Timothy J. Carroll, E. J. Ramberg, V. Eckardt, Martin Erdmann, G. Jancso, H. E. Montgomery, K. Olkiewicz, M. C. Green, G. Coutrakon, T. Kirk, R. B. Nickerson, J. Wilkes, D. E. Jaffe, A. Salvarani, H. J. Trost, K. Dziunikowska, Wit Busza, A. Manz, K. P. Schüler, D. McLeod, H. J. Gebauer, T. Dreyer, J. Haas, P.L. Anthony, Henry Lubatti, M. Vidal, D. F. Geesaman, V. W. Hughes, P. Malecki, P. Stopa, R. D. Kennedy, N. Schmitz, W. Dougherty, J. J. Lord, Jim Hanlon, J. F. Bartlett, I. Derado, and W. Mohr

Subjects
Physics, Nuclear reaction, Muon, Physics::Instrumentation and Detectors, Scattering, General Physics and Astronomy, chemistry.chemical_element, Elementary particle, Inelastic scattering, Nuclear physics, Xenon, Deuterium, chemistry, Saturation (graph theory), Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment
Abstract

The ratio of cross sections for inelastic muon scattering on xenon and deuterium nuclei was measured at very low Bjorken {ital x} (0.000 02{lt}{ital x}{sub Bj}{lt}0.25). The data were taken at Fermilab experiment E-665 with a 490 GeV/{ital c} muon beam incident on liquid deuterium and gaseous xenon targets. Two largely independent analysis techniques gave statistically consistent results. The xenon-to-deterium per-nucleon cross-section ratio is constant at approximately 0.7 for {ital x}{sub Bj} below 0.003.

Published
1992

34. On the systematic behaviour of the intermittency-indices in nuclear interactions

Author

K. G. Gulamov, V. Kumar, V. M. Rappoport, Vivek K. Gupta, B. Dressel, K. D. Tolstov, K. Söderström, H. O. Wang, Madan M. Aggarwal, F. G. Kadyrov, G. Z. Eligbaeva, L. P. Chernova, Z. I. Solovjeva, G. F. Xu, B. Judek, J. C. Zhou, N. S. Lukicheva, N. A. Salmanova, T. I. Shakhova, Anju Bhasin, D. H. Zhang, I. Y. Chasnikov, Y. A. Alexandrov, N. V. Petrov, F. A. Avetyan, D. C. Zhou, U.I. Tuleeva, V. S. Navotny, T. P. Trofimova, V. N. Lepetan, N. A. Marutyan, E. K. Kanygina, E. M. Friedlander, Sudhir Raniwala, L. E. Eremenko, W. Schulz, A. S. Gaitinov, N. Saidkhanov, H. H. Heckman, Z. Q. Weng, Evert Anders Stenlund, T. H. Burnett, Manjit Kaur, S. A. Krasnov, D. Skelding, J. T. Rhee, S. K. Badyal, L. N. Svechnikova, N. G. Peresadko, E. S. Basova, L. G. Sarkisova, Gautam Kaul, S. Garpman, P. J. Lindstrom, P. Lal, V. I. Bubnov, S. Mookerjee, G.S. Shabratova, S. Kachroo, S. K. Gupta, N. V. Maslennikova, I. S. Mittra, Bo Jakobsson, V. A. Plyushchev, S. Vokal, H. Nasrulaeva, G. I. Orlova, M. I. Tretyakova, V. R. Sarkisyan, P. Y. Zheng, Renu Arora, M. I. Adamovich, H. Huang, S. Lokanathan, N. P. Andreeva, V. S. Bhatia, L. S. Liu, V. G. Larionova, M. M. Chernyavski, R. J. Wilkes, S. G. Gerassimov, X. Cai, S. C. Strausz, L. K. Mangotra, S. I. Zhochova, K. B. Bhalla, S. B. Luo, Rashmi Raniwala, I. Otterlund, H. S. Palsania, B. Singh, J. F. Sun, N. K. Rao, S. H. Nasyrov, Z. V. Anson, C. Mueller, J. J. Lord, E. R. Ganssauge, J. Grote, S. P. Kharlamov, T. Koss, V. G. Bogdanov, M. Karabova, W. Y. Qian, and G. S. Kalyachkina

Subjects
Combinatorics, Physics, Nuclear and High Energy Physics
Abstract

M.I. Adamovich a, M.M. Aggarwal b, Y.A. Alexandrov a, N.P. Andreeva c, Z.V. Anson c, R. Arora b, F.A. Avetyan d, S.K. Badyal e, E. Basova f, K.B. Bhalla g, A. Bhasin e, V.S. Bhatia b, V.G. Bogdanov h, V.I. Bubnov c, T.H. Burnett i, X. Cai J, I.Y. Chasnikov c, L.P. Chernova k, M.M. Chernyavski a, B. Dressel ~, G.Z. Eligbaeva c, L.E. Eremenko ~, E.M. Friedlander m, A.S. Gaitinov ~, E.R. Ganssauge ~, S. Garpman ", S.G. Gerassimov a, j. Grote i, K.G. Gulamov k, S.K. Gupta g, V. Gupta e, H.H. Heckrnan ~, H. Huang J, B. Jakobsson ", B. Judek o, S. Kachroo e, F.G. Kadyrov k, G.S. Kalyachkina c, E.K. Kanygina ~, M. Karabova P, G.L. Kaul e, M. Kaur b, S.P. Kharlamov a, T. Koss i, S.A. Krasnov P, V. Kumar g, P. Lal g, V.G. Larionova a, V.N. Lepetan ~, P.J. Lindstrom m, L.S. Liu J, S. Lokanathan g, J. Lord i, N.S. Lukicheva k, S.B. Luo q, L.K. Mangotra e, N.A. Marutyan d, N.V. Maslennikova ", I.S. Mittra b, S. Mookerjee g, C. Mueller ~, H. Nasrulaeva f, S.H. Nasyrov f, V.S. Navotny k, G.I. Orlova a, I. Otterlund n, H.S. Palsania g, N.G. Peresadko a, N.V. Petrov f, V.A. Plyushchev h, W.Y. Qian J, R. Raniwala g, S. Raniwala g, N.K. Rao ~, V.M. Rappoport a, J.T. Rhee ~, N. Saidkhanov k, N.A. Salmanova ~, L.G. Sarkisova d, V.R. Sarkisyan d, W. Schulz ~, G.S. Shabratova P, T.I. Shakhova ~, B. Singh b, D. Skelding i, K. SSderstrSm ", Z.I. Solovjeva h, E. Stenlund n, S.C. Strausz i, J.F. Sun r, L.N. Svechnikova k, K.D. Tolstov P, M.I. Tretyakova a, T.P. Trofimova r, U. Tuleeva r, S. Vokal P, H.Q. Wang J, Z.Q. Weng r, R.J. Wilkes i, G.F. Xu s, D.H. Zhang q, P.Y. Zheng s, S.I. Zhochova k, D.C. Zhou J and J.C. Zhou J

Published
1991

35. Slow, target associated particles produced in ultrarelativistic heavy-ion interactions

Author

F. G. Kadyrov, Z. I. Solovjeva, T. I. Shakhova, D. Skelding, J. T. Rhee, H. Huang, M. I. Tretyakova, L. N. Svechnikova, N. A. Salmanova, S. K. Badyal, X. Cai, N. G. Peresadko, E. S. Basova, K. G. Gulamov, S. Lokanathan, Manjit Kaur, V. I. Bubnov, V. M. Rappoport, P. J. Lindstrom, S. Mookerjee, V. Kumar, J. J. Lord, N. V. Petrov, J. Grote, S. A. Krasnov, G. Z. Eligbaeva, T. Koss, Gautam Kaul, S. C. Strausz, F. A. Avetyan, A. S. Gaitinov, E. K. Kanygina, L. K. Mangotra, L. G. Sarkisova, V. A. Plyushchev, M. Karabova, L. E. Eremenko, S. P. Kharlamov, W. Schulz, L. P. Chernova, Bo Jakobsson, S. Vokal, P. Lal, V. G. Bogdanov, C. Mueller, D. C. Zhou, H. Q. Wang, V. R. Sarkisyan, S. B. Luo, D. H. Zhang, W. Y. Qian, T. H. Burnett, S. Garpman, I. Y. Chasnikov, Anju Bhasin, N. Saidkhanov, Y. A. Alexandrov, N. A. Marutyan, Renu Arora, N. P. Andreeva, Z. Q. Weng, G. S. Kalyachkina, N. V. Maslennikova, G. F. Xu, Evert Anders Stenlund, U.I. Tuleeva, S. G. Gerassimov, T. P. Trofimova, V. N. Lepetan, M. M. Chernyavsky, Madan M. Aggarwal, S. I. Zhokhova, V. S. Bhatia, E. R. Ganssauge, M. I. Adamovich, L. S. Liu, V. G. Larionova, V. S. Navotny, Z. V. Anson, I. S. Mittra, K. B. Bhalla, S. Kachroo, K. Söderström, B. Judek, N. S. Lukicheva, E. M. Friedlander, Sudhir Raniwala, Rashmi Raniwala, B. Singh, N. K. Rao, P. Y. Zheng, R. J. Wilkes, S. K. Gupta, G.S. Shabratova, H. Nasrulaeva, G. I. Orlova, Vivek K. Gupta, I. Otterlund, B. Dressel, K. D. Tolstov, H. S. Palsania, J. F. Sun, S. H. Nasyrov, and H. H. Heckman

Subjects
Physics, Nuclear and High Energy Physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Charged particle, Nuclear physics, medicine.anatomical_structure, medicine, Heavy ion, Nuclear emulsion, Atomic physics, Nuclear Experiment, Nucleus
Abstract

The slow, target associated particles produced in ultrarelativistic heavy-ion interactions are a quantitative probe of the cascading processes in the spectator parts of the target nucleus. These processes are directly influenced by the proper timescale for the formation of hadronic matter. In this letter we show experimental data on singly and multiply charged particles, with velocities smaller than 0.7 c , produced in ultrarelativistic heavy-ion interactions in nuclear emulsion.

Published
1991

36. STOCHASTIC EMISSION OF PARTICLES IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS

Author

S. Mookerjee, S. Kachroo, N. G. Peresadko, E. S. Basova, L. K. Mangotra, F. G. Kadyrov, Z. I. Solovjeva, S. I. Zhochova, T. I. Shakhova, Sudhir Raniwala, N. V. Petrov, H. Nasrulaeva, G. I. Orlova, Gautam Kaul, I. Otterlund, Rashmi Raniwala, K. Söderström, M. M. Chernyavski, T. H. Burnett, D. Skelding, Madan M. Aggarwal, K. G. Gulamov, F. A. Avetyan, B. Singh, J. T. Rhee, S. P. Kharlamov, Z. V. Anson, V. G. Bogdanov, N. K. Rao, T. P. Trofimova, V. Kumar, V. S. Navotny, P. J. Lindstrom, V. A. Plyushchev, S. Vokal, V. M. Rappoport, H. Huang, E. K. Kanygina, L. N. Svechnikova, I. S. Mittra, U.I. Tuleeva, N. A. Marutyan, Renu Arora, H. S. Palsania, L. E. Eremenko, L. P. Chernova, X. Cai, S. Garpman, E. R. Ganssauge, V. S. Bhatia, K. B. Bhalla, L. S. Liu, V. G. Larionova, P. Y. Zheng, Vivek K. Gupta, G. Z. Eligbaeva, W. Schulz, N. A. Salmanova, Bo Jakobsson, Manjit Kaur, N. P. Andreeva, B. Dressel, K. D. Tolstov, V. R. Sarkisyan, H. H. Heckman, M. I. Adamovich, S. G. Gerassimov, P. Lal, S. A. Krasnov, I. Y. Chasnikov, Y. A. Alexandrov, Anju Bhasin, G. F. Xu, N. Saidkhanov, A. S. Gaitinov, R. J. Wilkes, S. K. Badyal, B. Judek, E. Stenlund, V. N. Lepetan, Z. Q. Weng, Dong-Hai Zhang, N. S. Lukicheva, J. F. Sun, E. M. Friedlander, L. G. Sarkisova, S. H. Nasyrov, S. B. Luo, S. Lokanathan, D. C. Zhou, N. V. Maslennikova, C. Mueller, J. C. Zhou, S. C. Strausz, M. L. Tretyakova, G. S. Kalyachina, S. K. Gupta, G.S. Shabratova, J. J. Lord, J. Grote, T. Koss, M. Karabova, H. Q. Wang, W. Y. Qian, and V. I. Bubnov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Particle number, Elliptic flow, General Physics and Astronomy, Astronomy and Astrophysics, Heavy ion, Relativistic particle
Abstract

In this letter we show that most of the fluctuations in particle densities observed in relativistic heavy-ion collisions are consistent with stochastic emission, i.e., most of the correlations between produced particles are washed out due to the vast number of particles in the environment. We further explore the general trends by investigating different systems, energies and centrality cuts. Comparisons with the Fritiof model show that string fragmentation gives results similar to the data.

Published
1991

37. On the multiplicity fluctuations in relativistic heavy ion collisions

Author

J. J. Lord, J. Grote, D. Skelding, N. G. Peresadko, J. T. Rhee, I. Otterlund, J. F. Sun, P. J. Lindstrom, A. Gill, K. G. Gulamov, S. H. Nasyrov, F. G. Kadyrov, V. Kumar, L. P. Chernova, Madan M. Aggarwal, Gautam Kaul, K. B. Bhalla, M. M. Chernyavsky, S. Kachroo, S. P. Kharlamov, D. H. Zhang, B. Judek, N. S. Lukicheva, Renu Arora, S. Garpman, G. F. Xu, S. I. Gadzhieva, U. G. Gulyamov, V. S. Bhatia, L. S. Liu, Y. A. Alexandrov, V. G. Larionova, N. V. Petrov, C. Mueller, B. Dressel, I. S. Mittra, M. I. Adamovich, V. S. Navotny, H. Q. Wang, Anju Bhasin, W. Y. Qian, Z. O. Weng, Evert Anders Stenlund, W. Schulz, S. G. Gerassimov, S. Mookerjee, K. Söderström, L. N. Svechnikova, G. I. Orlova, N. V. Maslennikova, H. H. Heckman, M. I. Tretyakova, S. B. Luo, X. Cai, V. S. Shukla, T. H. Burnett, L. K. Mangotra, Manjit Kaur, P. Lal, J. C. Zhou, S. Lokanathan, D. C. Zhou, N. A. Salmanova, S. Hackel, Stefan Persson, E. R. Ganssauge, Rashmi Raniwala, B. Singh, N. K. Rao, E. M. Friedlander, Sudhir Raniwala, P. Y. Zheng, and R. J. Wilkes

Subjects
Nuclear reaction, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Dispersion relation, Hadron, Negative binomial distribution, Observable, Multiplicity (mathematics), Elementary particle, Nuclear Experiment, Ion
Abstract

In the present letter we discuss the general features of the multiplicity distributions in relativistic heavy ion collisions. It is shown that from simple statistical considerations it is possible to predict the dependence of the dispersions of multiplicity distributions on the average multiplicities in any given rapidty wwindow. The applicability of the negative binomial distribution to multiplicity distributions from collisions with heavy ions is discussed.

Published
1990

38. ON THE ENERGY AND MASS DEPENDENCE OF THE MULTIPLICITY IN RELATIVISTIC HEAVY-ION INTERACTIONS

Author

G. F. Xu, S. I. Gadzhieva, K. Söderström, R. A. Bondarenko, L. N. Svechnikova, D. C. Zhou, I. Otterlund, D. Skelding, J. T. Rhee, S. P. Kharlamov, P. J. Lindstrom, M. I. Adamovich, R. S. Storey, H. Kallies, N. V. Maslennikova, R. J. Wilkes, L. K. Mangotra, F. G. Kadyrov, B. Judek, N. S. Lukicheva, P. Lal, Anju Bhasin, S. Mookerjee, N. Saidkhanov, S. Kachroo, Madan M. Aggarwal, Renu Arora, E. M. Friedlander, N. A. Salmanova, V. S. Bhatia, S. Hackel, N. G. Peresadko, E. S. Basova, L. S. Liu, V. G. Larionova, H. H. Heckman, M. I. Tretyakova, Stefan Persson, N. V. Petrov, X. Cai, E. R. Ganssauge, V. S. Navotny, K. B. Bhalla, E. Stenlund, Manjit Kaur, H. Q. Wang, W. Y. Qian, Gautam Kaul, J. F. Sun, L. P. Chernova, S. Lokanathan, S. H. Nasyrov, S. Garpman, J. J. Lord, J. Grote, W. Schultz, Z. O. Weng, A. Gill, Y. A. Alexandrov, S. G. Gerassimov, J. C. Zhou, P. Y. Zheng, U. G. Gulyamov, T. P. Trofimova, C. Mueller, I. S. Mittra, Sudhir Raniwala, G. I. Orlova, V. S. Shukla, B. Dressel, Rashmi Raniwala, M. M. Chernyavsky, N. K. Rao, K. G. Gulamov, V. Kumar, T. H. Burnett, and Dong-Hai Zhang

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, General Physics and Astronomy, Binary number, Astronomy and Astrophysics, Multiplicity (mathematics), Relativistic particle, Nuclear physics, Heavy ion, Nuclear emulsion, Atomic physics, Nuclear Experiment, Nucleon
Abstract

The average multiplicities of singly charged relativistic particles in oxygen-induced interactions with a nuclear emulsion target are studied over the energy range 2.1–200 A GeV. A similar energy dependence as for proton-induced interactions is observed. Both the number of participating nucleons and the number of binary collisions are shown to be of importance for the particle production.

Published
1990

39. Target nucleus fragmentation in 16O+(Ag,Br) interactions at 200 A GeV

Author

M. M. Chernyavsky, V. Kumar, K. Söderström, R. A. Bondarenko, C. Mueller, S. Hackel, K. B. Bhalla, U. G. Gulyamov, J. J. Lord, Stefan Persson, S. Lokanathan, J. Grote, L. P. Chernova, S. Kachroo, E. R. Ganssauge, Sudhir Raniwala, M. I. Adamovich, H. Q. Wang, P. J. Lindstrom, L. K. Mangotra, F. G. Kadyrov, S. Mookerjee, B. Judek, W. Y. Qian, A. Gill, Renu Arora, N. S. Lukicheva, I. S. Mittra, V. S. Bhatia, P. Y. Zheng, P. Lal, N. A. Salmanova, L. S. Liu, V. G. Larionova, H. H. Heckman, J. C. Zhou, R. S. Storey, H. Kallies, N. V. Maslennikova, I. Otterlund, D. Skelding, J. T. Rhee, D. C. Zhou, B. Dressel, E. Stenlund, Rashmi Raniwala, W. Schultz, J. F. Sun, L. N. Svechnikova, S. H. Nasyrov, N. K. Rao, Y. A. Alexandrov, G. F. Xu, S. I. Gadzhieva, R. J. Wilkes, N. V. Petrov, Madan M. Aggarwal, T. P. Trofimova, Dong-Hai Zhang, V. S. Navotny, G. I. Orlova, Z. O. Weng, T. H. Burnett, V. S. Shukla, E. M. Friedlander, Anju Bhasin, N. Saidkhanov, Manjit Kaur, N. G. Peresadko, E. S. Basova, Gautam Kaul, S. Garpman, S. G. Gerassimov, M. I. Tretyakova, X. Cai, S. P. Kharlamov, and K. G. Gulamov

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Cascade, Multiplicity (chemistry), Nuclear Experiment, Particle Physics - Experiment, Nucleus fragmentation
Abstract

The multiplicity distributions of low-energetic target-associated particles from 200 A GeV oxygen-induced interactions with emulsion nuclei are presented. The experimental distributions are compared with distributions obtained using the Ranft and Fritiof simulation codes. It is found that the intra-nuclear cascade plays an important role in ion-induced interactions, similar to what is the case for hadron-induced interactions.

Published
1990

40. Backward emitted protons in interactions of neutrinos with nuclei in photoemulsion

Author

Yu.A. Batusov, V. Klukhin, J. Gress, Barbara Wosiek, D. Coppage, A. Bakich, O. K. Egorov, W. Wolter, V. A. Gapienko, V. I. Koreshev, V. V. Shamanov, P. V. Pitukhin, O.M. Kuznetsov, R. Rosenbladt, B. Wilczynska, N. Kwak, H. A. Rubin, V.V. Lyukov, M.I. Dayon, V. I. Baranov, M. Ivanova, A. Jurak, Andrzej Olszewski, V. Smirnitsky, P. Goritchev, Henryk Wilczyński, E. A. Pozharova, R. Ammar, V. M. Rappoport, J. J. Lord, V.I. Sirotenko, R. J. Wilkes, E. D. Kolganova, L. Voyvodic, H. Tchernev, S. Krzywdzinski, V. V. Ammosov, L.S. Peak, R. Stump, T. H. Burnett, R. Riemer, W. M. Smart, R. Davis, and S.A. Bunyatov

Subjects
Physics, Nuclear reaction, Range (particle radiation), Particle physics, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Hadron, Charged particle, Ion, Nuclear physics, Baryon, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Engineering (miscellaneous)
Abstract

Backward emitted protons with momentump>0.3 GeV/c in interactions of neutrino in the energy range 10–200 GeV with photoemulsion nuclei were investigated. Energy spectrum slope parameter of backward protons was measured to beT0=48.9±7.9 MeV. TheA-dependence power index of relative mean yield of backward protons was found to bea=0.68±0.12. A drop in the mean yield of backward protons at the four momentum squared over ∼15 (GeV/c)2 (the neutrino energy over ∼50 GeV) was observed.

Published
1992

41. Nuclear decay following deep inelastic scattering of 470 GeV muons

Author

R. W. Finlay, S. Magill, Janet Conrad, Timothy J. Carroll, K. Olkiewicz, K. P. Schüler, G. Siegert, W. Dougherty, B. Baller, U. Ecker, I. Derado, S. Wolbers, R. B. Nickerson, H. Venkataramania, M. Erdmann, R. S. Guo, K. A. Griffioen, Richard Wilson, F. S. Dietrich, G. Y. Fang, H. M. Braun, Shuichi Kunori, A. Manz, V. Papavassiliou, R. A. Swanson, H. Schellman, H. Breidung, E. J. Ramberg, V. W. Hughes, K. Hicks, P. Stopa, Jan Figiel, F. M. Pipkin, C. Halliwell, D. G. Michael, G. A. Snow, C. W. Salgado, D. H. Potterveld, R. Davisson, S. Söldner-Rembold, W. Wittek, Jorge G. Morfin, Tiefu Zhao, A. Zghiche, M. D. Baker, B. Pawlik, L.S. Osborne, H. E. Jackson, D. McLeod, D. Hantke, H. G. E. Kobrak, E. R. Kinney, A. Banerjee, P. Spentzouris, R. Otten, J. J. Ryan, J. J. Lord, H. E. Stier, H. L. Melanson, Mark Raymond Adams, T. Dreyer, T. Kirk, Norbert Schmitz, D. A. Averill, S. O'Day, M. Wilhelm, R. D. Kennedy, P. Madden, S. Kaufman, H. L. Clark, J. Haas, A. A. Bhatti, D. M. Jansen, S. Aïd, Wit Busza, H. J. Gebauer, A. Salvarani, Z. Jin, Michael Schmitt, Andris Skuja, V. Eckardt, H. E. Montgomery, Henry Lubatti, G. Jancso, P. L. Anthony, D. E. Jaffe, U. Bratzler, D. F. Geesaman, S. K. Dhawan, A. Röser, and A. V. Kotwal

Subjects
Nuclear reaction, Physics, Muon, Nuclear Theory, General Physics and Astronomy, Inelastic scattering, Deep inelastic scattering, Nuclear physics, Deuterium, Neutron, High Energy Physics::Experiment, Atomic physics, Nucleon, Nuclear Experiment, Radioactive decay
Abstract

We detected 1-10 MeV neutrons at laboratory angles from 80° to 140° in coincidence with 470 GeV muons deep inelastically scattered from H, D, C, Ca, and Pb targets. The neutron energy spectrum for Pb can be fitted with two components with temperature parameters of 0.7 and 5.0 MeV. The average neutron multiplicity for 40

Published
1995

42. Shadowing in Inelastic Scattering of Muons on Carbon, Calcium and Lead at Low XBj

Author

H. M. Braun, A. Salvarani, G. Jancso, K. P. Schüler, P. L. Anthony, Z. Jin, H. Venkataramania, F. S. Dietrich, H. Breidung, E. J. Ramberg, Janet Conrad, W. Wittek, Timothy J. Carroll, E. R. Kinney, M. Erdmann, J. Novak, U. Bratzler, J. J. Lord, T. Kirk, K. Hicks, H. E. Stier, D. A. Averill, G. A. Snow, W. Dougherty, L.S. Osborne, A. Zghiche, P. Stopa, H. G. E. Kobrak, Wit Busza, N. Schmitz, H. J. Gebauer, A. Banerjee, S. Magill, K. A. Griffioen, A. A. Bhatti, M. R. Adams, R. D. Kennedy, Henry Lubatti, G. Y. Fang, V. Papavassiliou, Andris Skuja, Shuichi Kunori, Satish Dhawan, C. Halliwell, D. E. Jaffe, R. B. Nickerson, B. Baller, R. A. Swanson, H. Schellman, F. M. Pipkin, J. J. Ryan, H. E. Jackson, U. Ecker, V. Eckardt, P. Madden, H. L. Clark, Michael Schmitt, H. E. Montgomery, D. H. Potterveld, T. Dreyer, D. F. Geesaman, Jorge G. Morfin, D. M. Jansen, V. W. Hughes, C. W. Salgado, J. Haas, S. Söldner-Rembold, Jan Figiel, I. Derado, Tiefu Zhao, S. Wolbers, H. L. Melanson, R. Otten, S. B. Kaufman, K. Olkiewicz, B. Pawlik, D. McLeod, A. Manz, G. Siegert, P. Spentzouris, M. D. Baker, D. Hantke, R. Davisson, Roger W. Finlay, Richard Wilson, A. Röser, D. G. Michael, S. O'Day, M. Wilhelm, R. S. Guo, S. Aïd, and A. V. Kotwal

Subjects
Physics, Muon, Physics and Astronomy (miscellaneous), chemistry.chemical_element, FOS: Physical sciences, Calcium, Inelastic scattering, High Energy Physics - Experiment, Momentum, Nuclear physics, High Energy Physics - Experiment (hep-ex), Deuterium, chemistry, High Energy Physics::Experiment, Fermilab, Atomic physics, Nuclear Experiment, Engineering (miscellaneous), Carbon
Abstract

Nuclear shadowing is observed in the per-nucleon cross-sections of positive muons on carbon, calcium and lead as compared to deuterium. The data were taken by Fermilab experiment E665 using inelastically scattered muons of mean incident momentum 470 GeV/c. Cross-section ratios are presented in the kinematic region 0.0001 < XBj, 22 pages, incl. 6 figures, to be published in Z. Phys. C

Published
1995

43. PRODUCTION OF CHARGED HADRONS BY POSITIVE MUONS ON DEUTERIUM AND XENON AT 490 GEV

Author

K. Dziunikowska, S. Magill, R. B. Nickerson, Jim Hanlon, J. J. Lord, A. Salvarani, S. K. Dhawan, M. Aderholz, M. Erdmann, W. Wittek, G. A. Snow, T. Dreyer, H. G. E. Kobrak, Janet Conrad, B. Pawlik, R. Davisson, A. Röser, Henry Lubatti, W. Dougherty, D. M. Jansen, J. Haas, D. G. Michael, V. W. Hughes, S. Söldner-Rembold, S. Krzywdzinski, J. F. Bartlett, I. Derado, W. Mohr, Tiefu Zhao, M. Wilhelm, Shuichi Kunori, C. W. Salgado, T. J. Caroll, S. B. Kaufman, H. L. Melanson, J. Wilkes, Jan Figiel, G. Jancso, G. Coutrakon, H. E. Jackson, M. C. Green, S. Aïd, Mark Raymond Adams, H. E. Stier, S. Wolbers, H. J. Trost, R. L. Talaga, L.S. Osborne, F. M. Pipkin, U. Ecker, V. Papavassiliou, A. Manz, J. J. Ryan, S. O'Day, K. Olkiewicz, D. F. Geesaman, P. L. Anthony, E. J. Ramberg, Ronald Gilman, Richard Wilson, H. Venkataramania, H. M. Braun, Andris Skuja, A. A. Bhatti, C. Halliwell, V. Eckardt, H. E. Montgomery, M. D. Baker, D. Hantke, H. J. Seyerlein, P. Stopa, R. D. Kennedy, T. Kirk, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, Jorge G. Morfin, K. P. Schüler, Norbert Schmitz, Wit Busza, Michael Schmitt, S. Tentindo-Repond, H. J. Gebauer, D. E. Jaffe, P. Malecki, and D. McLeod

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Hadron, Tevatron, Elementary particle, Deep inelastic scattering, Charged particle, Nuclear physics, Physics::Accelerator Physics, Rapidity, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Engineering (miscellaneous)
Abstract

Results on the production of charged hadrons in muon-deuteron and muon-xenon interactions are presented. The data were taken with the E665 spectrometer, which was exposed to the 490 GeV muon beam of the Tevatron at Fermilab. The use of a streamer chamber as vertex detector provides nearly 4π acceptance for charged particles. The μD data are compared with the μXe data in terms of multiplicity distributions, average multiplicities, forward-backward multiplicity correlations, rapidity and transverse momentum distributions and of two-particle rapidity correlations of charged hadrons. The data cover a range of invariant hadronic masses W from 8 to 30 GeV. © 1994 Springer-Verlag.

Published
1994

44. Sigma --nucleus interactions in emulsion at 350 GeV

Author

Krzysztof Wozniak, J. J. Lord, Henryk Wilczyński, M. Szarska, R. J. Wilkes, and W. Wolter

Subjects
Physics, Particle physics, Nuclear Theory, Hadron, Hyperon, Elementary particle, Inelastic scattering, Sigma baryon, Nuclear physics, Baryon, Pion, High Energy Physics::Experiment, Nuclear emulsion, Nuclear Experiment
Abstract

Experimental data on multiplicities and angular distributions of heavy ionizing and shower particles in inelastic interactions of 350 GeV ${\ensuremath{\Sigma}}^{\ensuremath{-}}$ hyperons in nuclear emulsion are presented. The data are compared with the results of other experiments on proton and pion interactions in emulsion at energies of 60-800 GeV. We observe no significant differences in the global characteristics of strange hyperon interactions relative to nonstrange baryon interactions at equivalent energies, other than those attributable to the differing cross sections.

Published
1993

45. Linear and nonlinear aspects of relativistic heavy ion interactions from EMU01 results

Author

G. S. Kalyachkina, V. G. Larinova, I. S. Mittra, D. C. Zhou, M. I. Adamovich, K. Söderström, L. K. Mangotra, F. G. Kadyrov, N. P. Andreeva, H. S. Palsania, E. Stenlund, J. F. Sun, E. R. Ganssauge, S. G. Gerassimov, T. I. Shakhova, P. Lal, V. A. Plyushchev, S. Vokal, Anju Bhasin, P. Y. Zheng, Joakim Nystrand, N. Saidkhanov, S. H. Nasyrov, Renu Arora, S. C. Strausz, T. P. Trofimova, N. G. Peresadko, E. S. Basova, H. Nasrulaeva, M. Karabova, V. S. Bhatia, H. Q. Wang, L. S. Liu, D. Skelding, W. Y. Qian, J. T. Rhee, G. I. Orlova, S. Kachroo, Z. Q. Weng, A. S. Gaitinov, N. A. Marutyan, Gautam Kaul, S. B. Luo, N. V. Maslennikova, H. Huang, I. Otterlund, L. G. Sarkisova, S. Mookerjee, J. J. Lord, S. K. Gupta, G.S. Shabratova, J. Grote, N. A. Salmanova, Rashmi Raniwala, S. P. Kharlamov, T. Koss, S. I. Zhokhova, V. G. Bogdanov, Z.V. Anzon, L. P. Chernova, B. Judek, M. I. Tretyakova, M. M. Chernyavsky, I. Y. Chasnikov, X. Cai, H. H. Heckman, E. K. Kanygina, N. S. Lukicheva, U.I. Tuleeva, Y. A. Alexandrov, N. V. Petrov, S. Garpman, Z. I. Solovieva, F. A. Avetyan, S. K. Badyal, N. K. Rao, S. Lokanatan, V. I. Bobnov, S. A. Krasnov, K. D. Tolstov, T. H. Burnett, J. Ravina, Sudhir Raniwala, G. F. Xu, R. J. Wilkes, V. N. Lepetan, L. E. Eremenko, Bo Jakobsson, V. R. Sarkisyan, K. B. Bhalla, Madan M. Aggarwal, V. S. Navotny, L. N. Svechnikova, V. M. Rappoport, Dong-Hai Zhang, K. G. Gulamov, V. Kumar, and G. Z. Eligbaeva

Subjects
Physics, Nuclear reaction, Physics::Instrumentation and Detectors, Detector, Fractal dimension, law.invention, Nonlinear system, Fractal, law, Intermittency, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, Nucleon
Abstract

The recent status of the EMU01 experiment where nuclear emulsions are used as both target/detector material for horizontally exposed stacks and as detector for vertically exposed chamber plates is discussed. An investigation of the behaviour in the number of produced particles per participating nucleon reveal weak nonlinear effects for the most central collisions. Intermittency index can be obtained from the density distributions for S+Au and S+Ag interactions which corresponds to fractal dimensions somewhat smaller than unity.

Published
1993

46. Observation of early photon conversions in high-energy cosmic-ray interactions

Author

A. Iyono, Thomas A. Parnell, W. Wolter, H. Oda, B. Wilczynska, J. Iwai, Y. Takahashi, R. Hol, J. P. Wefel, H. Wilczynski, F. E. Roberts, J. C. Gregory, T. H. Burnett, T. Tominaga, T. Hayashi, J. J. Lord, J. H. Derrickson, E. D. Olson, Michael Cherry, K. Asakimori, W. F. Fountain, E. Zager, O. Miyamura, yński, John W. Watts, S. Dake, A. Jurak, M. J. Christl, W. V. Jones, S. C. Strausz, T. Ogata, R. J. Wilkes, Barbara Wosiek, and M. Fuki

Subjects
Nuclear reaction, Nuclear physics, Physics, High energy, Photon, Angular distribution, Angular correlation, Cosmic ray, Multiplicity (chemistry), Electromagnetic radiation
Abstract

High energy cosmic ray interactions were studied by the JACEE Collaboration using balloon‐borne emulsion chambers at high altitude. In high energy, yet low multiplicity interactions many secondary vertices were observed, probably due to decays of short‐lived particles. Early conversions of photons were found in the vicinity of these vertices. Conversion distances and angular distributions of the photons were studied.

Published
1993

47. DUMAND-II progress report

Author

U. Berson, M. Jaworski, T. Lozic, H. Suzuki, K. K. Young, T. Aoki, M. Ito, R. Mitiguy, R. H. March, R. Lord, E. Hazen, Ugo Camerini, W. Grogan, L. McCourry, S. Narita, H. Hanada, Tadaichi Kitamura, E. Gergin, D. Orlov, Shunsuke Uehara, G. Wurm, T. Hayashino, C. M. Alexander, Vincent Z. Peterson, M. Jenko, K. Miller, P. Koske, P. Minkowski, D. Nicklaus, Makoto Sakuda, S. Kondo, C. Ley, K. Kobayakawa, H. Bradner, Peter Gorham, R. J. Wilkes, A. Yamaguchi, A. Okada, J. J. Lord, A. Mavretic, V. J. Stenger, Peter K.F. Grieder, K. Mitsui, P. Bosetti, Yasuo Ohashi, S. Tanaka, John G. Learned, C.H. Wiebusch, Stephen T. Dye, D. Harris, A. Roberts, J. W. Bolesta, P. E. Boynton, G. Wilkins, I. Yamamoto, S. Matsuno, T. Matsumoto, M. Mignard, Michael S. Webster, and H. Kawamoto

Subjects
Shore, Physics, geography, Particle physics, geography.geographical_feature_category, Physics::Instrumentation and Detectors, DUMAND Project, Optical detector, Detector, Particle detector, Nuclear physics, Neutrino detector, Software deployment, Systems engineering, Junction box
Abstract

The design, scientific goals, and capabilities of the DUMAND II detector system are described. Construction was authorized by DOE in 1990, and construction of various detector subsystems is under way. Current plans include deployment of the shore cable, junction box and three strings of optical detector modules in 1993, with expansion to the full 9‐string configuration about one year later.

Published
1992

48. DISTRIBUTIONS OF CHARGED HADRONS OBSERVED IN DEEP-INELASTIC MUON DEUTERIUM SCATTERING AT 490-GEV

Author

M. Wilhelm, H. Venkataramania, U. Ecker, M. Erdmann, A. Salvarani, S. Söldner-Rembold, S. Krzywdzinski, H. M. Braun, Tiefu Zhao, V. W. Hughes, F. M. Pipkin, Ronald Gilman, P. Stopa, Shuichi Kunori, Jan Figiel, C. Halliwell, S. B. Kaufman, S. Aïd, Richard Wilson, Henry Lubatti, T. Dreyer, E. J. Ramberg, R. B. Nickerson, G. A. Snow, W. Dougherty, Michael Schmitt, S. Tentindo-Repond, J. Haas, G. Jancso, S. O'Day, S. Magill, G. Coutrakon, R. D. Kennedy, W. Wittek, S. K. Dhawan, D. M. Jansen, D. E. Jaffe, D. Hantke, A. Röser, Norbert Schmitz, H. G. E. Kobrak, L. S. Osborne, H. E. Stier, J. J. Ryan, T. Kirk, Jorge G. Morfin, D. F. Geesaman, D. G. Michael, M. C. Green, K. Olkiewicz, H. J. Trost, Wit Busza, K. Dziunikowska, Pa. Malecki, R. Davisson, A. Eskreys, J. J. Lord, V. Papavassiliou, B. Pawlik, R. A. Swanson, P. H. Steinberg, H. Schellman, D. McLeod, Janet Conrad, A. Manz, S. A. Wolbers, J. Wilkes, A. A. Bhatti, K. P. Schüler, H. L. Melanson, Andris Skuja, V. Eckardt, H. E. Montgomery, Mark Raymond Adams, R. L. Talaga, M. D. Baker, H. J. Gebauer, M. Vidal, P. L. Anthony, H. J. Seyerlein, J. F. Bartlett, I. Derado, W. Mohr, Jim Hanlon, and H. E. Jackson

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Muon, Deuterium, Scattering, Hadron, High Energy Physics::Experiment, Center of mass, Inelastic scattering, Deep inelastic scattering, Nuclear Experiment
Abstract

Longitudinal and transverse momentum spectra of final state hadrons produced in deep-inelastic muon-deuterium scattering at incident muon energy of 490 GeV have been measured up to a hadronic center of mass energy of 30 GeV. The longitudinal distributions agree well with data from earlier muon-nucleon scattering experiments; these distributions tend to increase in steepness as the center of mass energy increases. Comparisons with e + e − data at comparable center of mass energies indicate slight differences. The transverse momentum distributions show an increase in mean p T 2 with an increase in the center of mass energy.

Published
1991

49. DUMAND II status report

Author

Yasuo Ohashi, C. E. Roos, A. Yamaguchi, R. J. Wilkes, J. J. Lord, R. Becker-Szendy, John G. Learned, J. Rathlev, D. O'Connor, S. Matsuno, Vincent Z. Peterson, T. Hayashino, H. Bradner, Stephen T. Dye, Tadaichi Kitamura, C. Ley, M. Jaworski, P. Minkowski, Peter K.F. Grieder, R. H. March, Makoto Sakuda, J. M. Clem, Michael S. Webster, P. E. Boynton, D. Dau, K. K. Young, P. Bosetti, V. Commichau, E. Hazen, T. Aoki, A. Roberts, Ugo Camerini, S. Tanaka, G. Wilkins, I. Yamamoto, P. Koske, K. Mitsui, V. J. Stenger, Shunsuke Uehara, K. Kobayakawa, D. Samm, and A. Okada

Subjects
Physics, Particle physics, Neutrino detector, Software deployment, DUMAND Project, Optical detector, Detector, Systems engineering, Junction box, Status report, Particle detector
Abstract

The scientific goals, design, capabilities, and status of the DUMAND II detector system are described. In June, 1989, the High Energy Physics Advisory Panel recommended support for construction of DUMAND II to the U.S. Department of Energy. Funding began in 1990, and prototype development for various detector subsystems is under way. Current plans include deployment of the shore cable, junction box and three strings of optical detector modules in 1992, and expansion to the full 9‐string configuration in 1993.

Published
1991

50. Elementary particle physics---Experimental

Author

T.H. Burnett, J. J. Lord, and R.J. Wilkes

Subjects
Nuclear reaction, Astroparticle physics, Physics, Particle physics, Muon, Large Hadron Collider, Physics::Instrumentation and Detectors, Particle detector, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Fermilab, Neutrino, Nuclear Experiment
Abstract

We are continuing a research program in high energy experimental particle physics and particle astrophysics. Studies of high energy hadronic interactions were performed using several techniques, in addition, a high energy leptoproduction experiment was continued at the Fermi National Accelerator Laboratory. We are participants in a joint US/Japan program to study nuclear interactions at energies two orders of magnitude greater than those of existing accelerators. The data are being collected with ballon-borne emulsion chambers. The properties of nuclear interactions at these high energies will reveal whether new production mechanisms come into play due to the high nuclear densities and temperatures obtained. We carried out closely related studies of hadronic interactions in emulsions exposed to high energy accelerator beams. We are members of a large international collaboration which has exposed emulsion chamber detectors to beams of {sup 32}S and {sup 16}O with energy 60 and 200 GeV/n at CERN and 15 GeV/n at Brookhaven National Laboratory. The primary objectives of this program are to determine the existence and properties of the hypothesized quark-gluon phase of matter, and its possible relation to a variety of anomalous observations. Studies of leptoproduction processes at high energies involve two separate experiments, one using the Tevatronmore » 500 GeV muon beam and the other exploring the >TeV regime. We are participants in Fermilab experiment E665 employing a comprehensive counter/streamer chamber detector system. During the past year we joined the DUMAND Collaboration, and have been assigned responsibility for development and construction of critical components for the deep undersea neutrino detector facility, to be deployed in 1991. In addition, we are making significant contributions to the design of the triggering system to be used.« less

Published
1990

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